105 results listed
Diyarbakır houses that is formulated in accordance
with local and regional climate conditions, is important within
the context of sustainable architecture. The examination of these
houses can be guide in terms of maintaining sustainable criteria.
In this study, energy performance analysis of an example
Diyarbakir house is made with the help of dynamic simulation
program and the current situation has been determined. If it is in
the following stage, the energy saving is determined if the
building envelope components of Diyarbakir houses are changed
by upgrading to desired building envelope properties in the
Passive House Standard. As a result, it has been observed that
there is considerable energy savings even when only building
envelope components of Diyarbakir houses are replaced
according to Passive House Standard.
Yerel ve bölgesel iklim koşullarına uygun olarak
biçimlenen verniküler mimari örneklerinden Diyarbakır evleri,
sürdürülebilir mimarlık bağlamında önemlidir. Bu evlerin
incelenmesi, yeni binaların sürdürülebilir ölçütleri sağlaması
açısından yol gösterici niteliktedir. Bu bağlamda, çalışma
kapsamında dinamik simülasyon/benzetim programı yardımı ile
örnek bir Diyarbakır evinin enerji performans analizi yapılmış
ve mevcut durum saptanmıştır. İzleyen aşamada ise Diyarbakır
evinin kabuk bileşenleri Pasif Ev Standardında istenen kabuk
özelliklerine yükseltilerek, Diyarbakır evlerinin sadece kabuk
bileşenleri özellikleri değiştirildiğinde elde edilen enerji kazancı
tespiti yapılmıştır. Çalışma sonucunda Diyarbakır evlerinin
sadece kabuk bileşenleri değiştirildiğinde bile önemli ölçüde
enerji tasarrufu sağlandığı gözlenmiştir.
International Conference on Advanced Technologies, Computer Engineering and Science
ICATCES
Gülçin Süt
Merve Tuna Kayılı
Nilay Özeler Kanan
The number of papers published in the field of
sustainable design and management of biomass based fuel/energy
supply chains has risen considerably in recent years, in parallel
with the academic and corporate interest in sustainable supply
chains. The practical challenges related to economical,
environmental and social sustainability considerations have to be
overcome using proper criteria and methodologies to select the
promising configuration options and assess the existing systems
in terms of sustainability. Considering this fact, the aim of this
study is to provide a comprehensive review of the papers in this
field focusing on sustainability assessment as well as design and
implementation of sustainable bioenergy/biofuel systems to
reveal the body of knowledge in this field and highlight the
future research directions to fulfil the gaps in current efforts
1.st International Conference Energy Systems Engineering
ıcese'17
Şebnem Yılmaz Balaman
Output characteristic curve of photovoltaic arrays has
one global peak and one or more local peak under partially
shaded conditions. The conventional maximum power point
tracking (MPPT) algorithms such as Incremental Conductance
(IC) may be trapped in the local maximum power point. So they
may not find global maximum power point. However; soft
computing methods such as Bat algorithm may find it. This
paper proposes MPPT of photovoltaic system using modified BA
and IC algorithm. The standard BA has been modified by adding
a similar feature to tabu list of Tabu Search algorithm. In search
process, firstly, modified BA is used to determine the area of
global peak, then IC algorithm is replaced to track the maximum
power point in the area of global peak. If the power varies
greatly and rapidly, the search process starts again. Standard BA,
IC algorithm and the proposed method are simulated under
standard test condition and partially shaded conditions.
Simulations show that the proposed method is successful even in
difficult conditions such as partial shadowing.
1.st International Conference Energy Systems Engineering
ıcese'17
Hüseyin DEMİREL
M. Kadir KARAGÖZ
Bilgehan ERKAL
The demand for dielectric materials has increased
rapidly since the energy storage systems have an important place
in many areas such as medical, defense, military,
telecommunication and aerospace applications. The interaction
of the electromagnetic waves with matter provides valuable
information about the stored energy by material. Therefore, in
order to have knowledge about the characteristic structure of a
material, it is important to know the dielectric properties of
material which are dielectric constant and loss tangent. Hence,
the capacitor as an example of energy applications, which owes
its energy storage capability to the internal dielectric material, is
designed by using Ansys Maxwell software program to indicate
the dependence of the capacitance on the dielectric constant and
different design. The relationship between energy storage
capacity and different design is shown by using different
structures which are parallel plate and multi layered models.
Furthermore, a new model has been designed and analyzed to
increase the performance of energy storage. It is aimed to
increase the interaction between surface area of dielectric
material and conductive pipes/wires with this operation.
1.st International Conference Energy Systems Engineering
ıcese'17
Turgut Ozturk
In this numerical study, flow control over NACA 0018
with bumpy surface at low Reynolds number was investigated.
Solutions were performed at angle of attack 10° and Reynolds
number of 60.000 and 80.000. Results demonstrated that at
Reynolds number of 60.000 the bubble burst took place over the
base airfoil whereas flow over the bumpy reattached the surface
except a small laminar separation bubble. At Reynolds number
of 80.000, a small laminar separation bubble formed over the
base airfoil and this bubble got smaller over the bumpy airfoil.
1.st International Conference Energy Systems Engineering
ıcese'17
İlyas Karasu
H. Demir
Kemal Koca
Mustafa Özden
M.S. Genç
Özkan Ramazan
It is very well known that radiant cooling systems
provide better thermal comfort than conventional systems and
they also minimize the energy consumption. Due to that reasons,
radiant cooling systems have been getting more interest of
scientists recently.
In this study, the effect of a radiant cooling system (which was
located on the walls of a standard room) and ventilation system
on the thermal comfort was investigated numerically. For this
purpose, these investigations were compared to each other
according to the PMV-PPD parameters. As a result of the study,
it is clearly obvious that ventilation with radiant cooling system
provides better thermal comfort in terms of Indoor Air Quality.
In respect to the CFD results; ceiling ventilation which is located
next to the window creates thermal protection curtain. Thus the
ventilation system blocks the heat transfer from the window in to
the room. And hence, the ventilation system positively
contributes to indoor air quality.
1.st International Conference Energy Systems Engineering
ıcese'17
Onur Oruç
İ.Teke
Zafer Gemici
E.Tütüncü
The largest share of energy resources used in the
world is about 90% of fossil fuels such as coal, oil and natural
gas. However, the reserves of the subject fuels are limited and
exhausted. In addition to the economic dimension of energy
consumption, the negative effects on the environment are also
known. The energy efficiency we have been hearing more and
more over the past few years as the global consequences of global
warming become apparent are not the use of energy and
prosperity. Energy efficiency, in other words, more efficient
heating, better quality lighting, using some techniques, materials,
devices to produce more and more conscious, reducing energy
consumption and doing the same work with less energy. In this
study, as the amount of population and energy consumption
increased, the energy efficiency situation of the world and
Turkey was analysed and some evaluations were made for the
future.
1.st International Conference Energy Systems Engineering
ıcese'17
Hilmi Zenk
The Energy Development Index (EDI) was developed
by the International Energy Agency (IEA) as a measure of the
progress of an economy in modern fuels and modern energy
services. EDI provides an analytical basis for the creation of
policies to measure energy poverty in a country. To calculate
EDI , there are two indicators of access to modern energy
systems for households; Access to electricity and clean cooking
facilities etc. In this study, four indications were set out from two
indicators in order to capture all dimensions of energy
development. They are ; Annual electricity consumption per
person (kWh), share of households using electricity for lighting
(%), share of gaseous fuels used by households for cooking (%)
and the share of households in total energy consumption (%).
The values of each indicator were found and then normalized.
Hence, the average of the four indicators were obtained and
Turkey's EDI value was determined. as well.
1.st International Conference Energy Systems Engineering
ıcese'17
Gülbahar Bilgiç
Electric Water Heater (EWH) is one of the most
power consuming devices in a house and it is very convenient
for demand response applications. However, demand
response potential of EWH is not utilized by the users. In
order to provide the greater participation of EWHs to
demand response, they should be controlled automatically,
not with human hand. Active control of the EWH in
accordance with the price information from the network is
recommended for this purpose. Active control (AC) is
performed via Smart Meter (SM) and Active Control Units
(ACU) in the house. While electricity prices are sent by the
smart grid to ACU via SM, the users introduce their comfort
temperature zone and demand response participation rate to
the ACU. Updated temperature set point for water heating is
determined by ACU using network information and the user
preferences. When electricity price is high, the temperature
set point is set to a lower value and when the electricity price
is low, temperature set point is adjusted a higher value
according to the user requests. In this study, active control of
the temperature set point is carried out on physical model of
EWH. Energy consumption quantity and cost are compared
for the cases where AC is implemented and AC is not
implemented. Active control of EWH provides decrease in
energy consumption costs for the user and to reduce the peak
loads in terms of grid, as well.
1.st International Conference Energy Systems Engineering
ıcese'17
Ahmet Doğan
Mustafa Alçı
Bu çalışmada, güneş enerjisi destekli ve ısı pompalı
akışkan yataklı bir kurutucu tasarlanmış, imal edilmiş ve
deneysel olarak test edilmiştir. Kurutma sistemi; havalı güneş
kolektörleri, parabolik oluklu güneş kolektörü ve ısı pompası
sisteminden oluşmaktadır. Sistemde nane yaprakları
kurutulmuştur. Sistemin kurutma performansının tespiti için
nem içeriği (MC) ve nem oranı (MR) parametrelerinden
yararlanılmıştır. Nane yaprakları 5.67 g su/g kuru madde
başlangıç nem içeriğinden, 0.17 g su/g kuru madde nem içeriğine
kadar on bir saatte kurutulmuşlardır. Sistem performansının
değerlendirilebilmesi için enerji ve ekserji analizi
gerçekleştirilmiştir. Sistemde havalı güneş kolektörlü çalışma
modu için sistem verimi değerleri ortalama olarak %78.55
olarak hesaplanmıştır. Parabolik oluklu sistem için verim ise
ortalama %22.69 olarak bulunmuştur. Isı pompası sisteminin
COPts değeri ortalama olarak 5.21 olarak hesaplanmıştır. Ekserji
verimleri havalı güneş kolektörlü çalışma modu için %29.63
olurken, parabolik oluklu güneş kolektörlü çalışma modu için bu
değer %14.63 olarak hesaplanmıştır. Isı pompalı çalışma
modunda ise bu değer %25.81 olmuştur. Sistemin genel ekserji
verimi ise %26.66 olarak hesaplanmıştır.
1.st International Conference Energy Systems Engineering
ıcese'17
İlhan Ceylan
Ali Etem Gürel
Supply of the energy without corruption is critical for
the countries. Especially, in the developing countries such as
Turkey, Indonesia, Malaysia, Pakistan and Iran sustainable
energy directly depend on the economy. Geopolitical and social
problems hit the energisers and weigh down the countries lots of
time. In this respect, governments should have one more
alternatives to back up their energy policy. In this paper, energy
sustainability and security vision of Turkey has been evaluated.
1.st International Conference Energy Systems Engineering
ıcese'17
Selcuk Selimli
Günümüz dünyasında değişen ve gelişen teknoloji araç
sayısındaki hızlı artış petrol kökenli yakıtların sınırlılıkları ve
çevreye vermiş olduğu zararlar düşünüldüğünde yenilebilir
enerjiye hızlı bir dönüş olması düşünülmektedir. Biyodizeller
petrol kökenli yakıtlarda karşılaştırıldığı zaman emisyon
değerleri daha düşüktür yani çevreyi ve insan sağlığını daha az
tehdit etmektedir. Biyodizel yakıtlar bitkisel ve hayvansal
yağlardan elde edilir. Günümüzde biyodizel yakıtların yaygın
olarak kullanılmamasının sebebi üretim maliyetinin yüksek
olmasıdır. Bu aşamada atık yağlardan üretilen biyodizel büyük
önem arz etmektedir. Çünkü atık bitkisel yağın biyodizel yakıtı
olarak geri dönüşüm maliyeti çok düşüktür. Ayrıca atık
yağlardan biyodizel üretmek iki türlü çevreye katkı
sağlamaktadır. Birincisi emisyon değerlerinin dizel yakıtına göre
daha düşük olması, ikincisi de atık yağın, çevreye direk atılarak
toprağı ve suyu zehirlemesinin önlenmesidir. Biyodizel yakıtın
diğer bir artı yönü ise dizel motorların yapısında kapsamlı bir
değişikliğe gitmeden kullanılabilir olmasıdır.
The rapid increase in the number of technological
vehicles that are changing and evolving in today's world
considering the limitations of petroleum-based fuels and the
damages they have caused to the environment, it is considered
that there is a rapid return to renewable energy. When
compared to petroleum fuels, biodiesel is lower in emission
values, which means less threat to the environment and human
health. Biodiesel fuels are derived from vegetable and animal
oils. Today, the fact that biodiesel fuels are not used extensively is
a high cost of production. At this stage, biodiesel produced from
waste oils is of great importance. Because the cost of production
is very low. Producing biodiesel from waste oils also contributes
to the environment in two ways. The first is that the emission
values are lower than the diesel fuel, and the second is the
prevention of soil and water poisoning by throwing waste oil
directly into the environment. Another positive aspect of
biodiesel fuel is that it can be used without extensive changes in
the structure of diesel engines.
1.st International Conference Energy Systems Engineering
ıcese'17
M. Afşar
M.Aydin
M.B. Çelik
Nowadays, fossil fuels that have risked extinct and
increasing the cost of those fuels are increased using electric
energy and researches on this issue. Devices such as Mobile
phones, portable computers, electric cars, electric aircraft, etc.
are provided electrical demand by batteries. Knowing the state of
batteries during to continuous using is important for the not
tardiness of work. Many studies on this subject are made. In this
study, the filling rate of the battery modeled in MATLAB
environment was estimated with Coulomb Counting Method and
BP Neural Network methods. Performance comparison between
methods was made
1.st International Conference Energy Systems Engineering
ıcese'17
Musa Matlı
Ali Uysal
Nowadays, the energy efficient design of building
shells in new buildings and the improvement of building shells
in existing buildings is one of the priority applications in
order to provide energy efficiency in buildings.According to
the International Energy Agency (IEA) Energy Efficiency
Report 2017, politics have focused primarily on the issue of
building shell instead of heating and cooling equipment. The
same report states that energy efficiency has been improved
and that more will still be possible. For this reason, it is
necessary to review recent political documents and to compile
applications and reports on energy efficiency of buildings,
especially in the case of building envelope. In this study, it is
aimed to compare the developments in HVAC technology in
Turkey with Japan and Denmark that are the major countries
being made effective progress in structure shell and HVAC
technology according to OECD and IEA 2017 data. By this
study, it is also targetedto collectbasic information for
updating and/or restoring policies related to energy efficiency.
Yeni binalarda yapı kabuğunun enerji verimli olarak
tasarlanması, mevcut binalarda ise yapı kabuğunun
iyileştirilmesi günümüzde binalarda enerji verimliliğinin
sağlanması adına öncelikli uygulamalar arasında yer
almaktadır.Uluslararası Enerji Ajansı (IEA) 2017 yılı Enerji
Verimliliği Raporuna göre; politikalar ısıtma ve soğutma
ekipmanlarından ziyade öncelikli olarak yapı kabuğu
konusuna odaklanmıştır.Aynı raporda binalarda enerji
verimliliği alanında gelişme yaşandığı ve daha fazlasının hala
mümkün olacağı belirtilmektedir.Bu nedenle son politik
dökümanların incelenmesi ve özellikle yapı kabuğu özelinde
binalarda enerji verimliliğine dair yapılan uygulama ve
raporların derlenmesi gerekmektedir.Bu çalışmada OECD ve
IEA 2017 verilerinde HVAC teknolojisinde ve yapı
kabuğunda etkin ilerleme gösteren başlıca ülkeler olan
Japonya ve Danimarka ile Türkiye’deki gelişmelerin
karşılaştırılması hedeflenmektedir.Çalışma ile binalarda
enerji verimliliği ile ilgili politikaların güncellenmesi ve/veya
yeniden oluşturulması için bir altlık bilginin toparlanması da
amaçlanmaktadır.
1.st International Conference Energy Systems Engineering
ıcese'17
Nilay Özeler Kanan
Merve Tuna Kayılı
Gülçin Süt
Bu çalışmada, bir binanın elektrik, soğutma ve ısıtma
ihtiyaçlarına destek olabilecek bir sistem tasarlanmış ve prototipi
üretilmiştir. Isıtma amacıyla binanın çatısını kaplayan
fotovoltaik panellerin panel arkası sıcaklığı kullanılırken
soğutma amacıyla ise yine binaya entegre edilen ve fotovoltaik
panellerde üretilen elektrik enerjisinin bir kısmını kullanan
absorpsiyonlu soğutma sistemi kullanılmıştır. Panellerden elde
edilen elektrik enerjisinin ısıtma ve soğutma faaliyetindeki
kullanımdan artakalan kısmı ise akümülatörde depo edilmiştir.
Yapılan deneyler neticesinde sistemin soğutma esnasındaki
termal enerji verimi %37 olarak hesaplanırken, ısıtma
esnasındaki termal enerji verimi %46 olarak hesaplanmıştır.
1.st International Conference Energy Systems Engineering
ıcese'17
Sadık Zuhur
İlhan Ceylan
Bu çalışmada, bir entegre tekstil üretim işletmesinde
enerji verimliliğinin artırılması için bazı önemli çalışmalar
yapılmıştır. Bu kapsamda basınçlı hava sistemleri, sıcak
hatlar ve yüzeyler, aydınlatma sistemleri, ring iplik
makineleri, ram makineleri, buhar ve kızgın yağ kazanları
incelenmiştir. Üretim aşamasında ring iplik makinelerinde
kullanılan masuraların daha düşük kütleli masuralar ile
değiştirilmesi analiz edilmiştir. Ram makinelerinde kızgın yağ
ile ısıtma yerine doğalgaz brülörlü ısıtma sistemi incelenmiş
ve yapılabilecek enerji tasarruf potansiyeli hesaplanmıştır.
Basınçlı hava sistemlerinde kompresörlerin çalışma sistemi ve
basınç değerleri analiz edilmiş ve enerji tasarruf
potansiyelleri hesaplanmıştır. Sıcak hatların ve yüzeylerin
kontrolü yapılarak, izolasyon eksikliklerinin giderilmesi ve
ayrıyeten, işletmedeki mevcut aydınlatma sistemlerinin LED
teknolojisine dönüşümü ile elde edilecek enerji tasarruf
potansiyeli belirlenmiştir.
In this study, some important studies have been
realized to increase energy efficiency in an integrated textile
production operation. In this scope, compressed air systems,
hot lines and surfaces, lighting systems, ring spinning
machines, stenter machines, steam and hot oil boilers have
been examined. Replacement of the rollers (bobbins) used in
ring spinning machines with the rollers with lower mass was
analyzed during the production process. Instead of heating
with hot oil, natural gas burner heating system has been
investigated in stenter machines and energy saving potential
has been calculated. The operating system and pressure
values of the compressors in the compressed air systems are
analyzed and the energy saving potentials are calculated,
accordingly. By checking the hot lines and surfaces, it is
determined that the deficiency of insulation is eliminated and
additionally, the energy saving potential which can be
obtained by conversion of existing lighting systems into LED
technology is determined in the operation
1.st International Conference Energy Systems Engineering
ıcese'17
Mehmet Önder SERT
Muharrem EYİDOĞAN
Fatma Çanka Kılıç
Durmuş KAYA
Günümüzde soğutma sistemlerinin elektrik enerjisi
tüketmesi ve elektrik enerji maliyetlerinin yüksek olmasından
dolayı atık ısı kaynağı ile çalışan absorbsiyonlu soğutma
sistemleri önem kazanmıştır. Enerji kaynağı olarak her türlü
atık ısıl ısı enerjiyi kullanabilen absorbsiyonlu soğutma
sistemleri, atık ısı dışında ek bir enerjiye ihtiyaç
duymamalarından dolayı soğutma ve iklimlendirme
uygulamalarında tercih edilmektedirler. Bu çalışmada, bir
kimyasal üretim tesisinde mevcut mekanik chiller kullanımı
yerine kojenerasyon atık ısısının absorbsiyonlu chillerde
kullanılması ile yapılabilecek enerji tasarruf potansiyeli
incelenmiştir. Çalışma kapsamında mevcut kojenerasyon atık
ısının kullanım potansiyeli araştırılmış ve tesiste kullanılan
mekanik soğutucuların uygulama öncesi enerji tüketimleri ile
soğutma yükleri belirlenmiştir. Mevcut mekanik soğutucuların
yerine kojenerasyon atık ısısı kullanılarak absorbsiyonlu
soğutuculara dönüştürülmesi ile elde edilecek tasarruf miktarı
hesaplanmıştır.
Nowadays, absorption cooling systems are gaining
importance because of the excessive electricity consumption and
the high energy costs of the cooling systems. Absorption cooling
systems, which can use any type of heat energy as an external
energy source and they are preferred for cooling and air
conditioning applications because they do not need an additional
energy source. In this study, it was aimed to increase energy
efficiency by using cogeneration waste heat in an absorption
chiller instead of using existing mechanical chiller in a chemical
production plant. In the scope of the study, the usage potential of
existing cogeneration waste heat was investigated and energy
consumption and cooling loads of the mechanical coolers were
measured in the pre-application period. The amount of energy
savings was also calculated in the case of replacing existing
mechanical coolers with absorption coolers by using
cogeneration waste heat
1.st International Conference Energy Systems Engineering
ıcese'17
İbrahı̇m Mert Yıldırım
Durmuş KAYA
Muharrem EYİDOĞAN
Fatma Çanka Kılıç
Necmi Cemal Özdemir
Economical dispatch (ED) problem is defined to
obtain an equilibrium point between power generator and cost of
each generator. As a conventional definition, the ED problem is
defined as the sum of cost from each generator under
constraints. Even total cost is defined as the main objective of the
problem, the loss at the transmission lines is included as that
total power generation must be equal to the loss at the
transmission lines and demand at the load. However loss as the
transmission line is an important topic for efficiency. Therefore,
in this paper transmission loss is defined as a new objective
without changing the constraints. This multi-objective ED
problem is solved by using multiobjective optimization
algorithms. For this purpose three MOEA are applied to the
problem and compared with each other. These algorithms are
Multi-Objective Particle Swarm Optimization (MOPSO),
Strength Pareto Evolutionary Algorithm 2 (SPEA2) and Nondominated Sorting Genetic Algorithm II (NSGA-II). The
performance of these algorithms is aimed to improve with chaosbased random number generator. In total, 6 set of results from
multiobjective optimization (both conventional and chaos
improved) results are compared and discussed with each other.
1.st International Conference Energy Systems Engineering
ıcese'17
O. Tolga ALTINÖZ
The residual of poultry litter is rising in
parallel with increase in number of poultry farming, and
that waste causes environmental problems due to
difficulties in disposal of waste. Although biochar
production is an alternative technology to solve this
problem, evaluation of biochar is also an important case
for economical sustainability. Depending on the
application area, biochar, that had variable
characteristics, can be produced by different thermal
processes. In this study, the characteristics of products
(biochar and gas) produced by torrefaction were
investigated to reveal the evaluation of products, especially
biochar. The poultry litter was torrefied at low
temperature (300°C) in long residence time (60 minute).
The products were characterized according to heating
value, proximate, ultimate and chemical analysis along
with gas analysis. Characteristic of feedstock was also
determined for comparison. As a result, about 1.5 fold
improvement in properties of feedstock by torrefaction
was observed. The poultry-litter based biochar had the
similar properties with lignite and thus it would be used as
alternative fuel in coal-fired plants for Turkey. Although
heavy metal concentration of biomass is changed in wide
range, the biochar produced from poultry litter had
acceptable amount of heavy metal and adequate content of
nutrient for improvement of plant growth. For that
reason, the application of biochar as soil amendment could
also be proposed.
1.st International Conference Energy Systems Engineering
ıcese'17
Kutlu Ozben
Kocar Gunnur
Hydrogen can be produced by many processes, by a
series of chemical reactions, many of which have been known for
centuries. However, most of these reactions raise severe
environmental and safety problems. The analysis of Hydrogen
production without CO2 emissions is one of the most challenging
activities that have been initiated for a sustainable energy supply.
As one of the tracks to fulfil such objective, direct methane
cracking has been proposed.
In this context comes this numerical simulation of the methane
cracking phenomenon. The cracking phenomena of the methane
into hydrogen and carbon black takes place in a cylindrical
cavity of 16 cm in diameter and 40 cm in length under the heat of
concentrated solar radiation without any catalyst. The low
Reynolds K - ε turbulence model was applied. A time step of
0.04s has been used. A commercial calculation code "ANSYS
FLUENT" is used to simulate the cracking phenomena. The
effect of temperature, methane flow rate and residence time has
been analysed. From the view point of solar energy two cases
were studied: the first one applying a maximum solar radiation
of 16MW/m2 on the side wall of the reactor and the second one
applying a maximum solar radiation of 5 MW/m2. The CH4 flow
rates used at the inlet of the reactor are 0.10, 0.30, 0.58, 0.60, 0.62,
0.76, 0.94 and 1.25L/min. From the view point of phase numbers
three cases with were considered: first, the mixture is considered
to be biphasic formed by a gaseous phase with methane,
hydrogen gases and carbon black powder solid phase, this
powder is formed by solid particles with same diameter
(d=50nm); the second case is a mixture of 3 phases, i.e. a carbon
powder of 2 different diameters plus a gas phase; the third case
is a mixture of 5 phases, i.e. a carbon powder of 4 different
diameters plus a gas phase.
1.st International Conference Energy Systems Engineering
ıcese'17
Rabah Gomri
Belkacem Nezzari
Buhar sıkıştırmalı soğutma sistemlerinde doyma
çevrimleri, genleşme prosesini doymuş sıvı eğrisine, sıkıştırma
prosesini ise doymuş buhar eğrisine yaklaştırmak amacıyla
düşünülmektedir. Buhar sıkıştırmalı çevrimlerde kompresör ve
kısılma vanasındaki tersinmezlikleri azaltmak amacıyla
kullanılması düşünülen doyma çevriminin ekserjetik analizi
Engineering Equation Solver (EES) yardımıyla yapılmıştır. İş
gören akışkan olarak R410A’nın kullanıldığı düşünülmüştür.
Doyma çevrimlerinde kademe sayısının, toplam ve her bir
elemandaki tersinmezlik miktarı ve sistemin ekserji verimi
üzerine etkisi araştırılmıştır. Çok kademeli doyma çevrimlerinde
ekserji veriminin evaporatör ve kondenser sıcaklıkları ile
değişimi incelenmiştir. Elde edilen sonuçlara göre, bir kademeli
sistemden iki kademeli sisteme geçerken, tersinmezliğin daha
büyük oranda düştüğü, kademe sayısı üç veya dört olduğunda bu
iyileşme oranının azaldığı bulunmuştur. Çok kademeli doyma
çevrimlerinin uygulanılması ile tersinmezliklerin en çok
kompresörde, sonra da genleşme valfinde azaldığı belirlenmiştir.
En çok tersinmezliğe sahip çevrim elemanının kompresör en az
tersinmezliğe sahip çevrim elemanının separatör olduğu tespit
edilmiştir. Kademe sayısı 2, 3 ve 4 olduğunda, ekserji verimi bir
önceki kademeye göre sırasıyla %28, %6 ve %2,6 oranında
artmıştır. Kondenser sıcaklığı arttıkça ekserji veriminin azaldığı,
evaporatör sıcaklığı arttıkça ekserji veriminin yükseldiği tespit
edilmiştir.
Saturation cycle is proposed in order to approximate
the expansion process to the saturated liquid curve and the
compression process to the saturated vapor curve for vapor
compression refrigeration systems. Engineering Equation Solver
(EES) software was used for the exergetic analysis of the
saturation cycle, which is intended to reduce the irreversibility of
the compressor and throttle valve in vapor compression cycles.
R410A was selected as the working fluid. The effect of the
number of stages on total irreversibility amount, irreversibility
amount of each cycle member and exergy efficiency of system
was investigated in saturation cycles. The variation of exergy
efficiency with evaporator and condenser temperatures was
investigated in multi-stage saturation cycles. According to the
results obtained it was found that the decrease in irreversibility
occurred most as the transition from one-stage system to twostage system occurred. As the stage number was increased to three or four the decrease rate of irreversibility fell. It was
determined that the implementation of multi-stage saturation
cycles reduces the irreversibilities most in the compressor and
then in the expansion valve. It was determined that the
compressor has the most irreversibility among the cycle
members and the separator has the least irreversibility among
the cycle members. As the stage number was increased to 2, 3
and 4, the exergy efficiency according to previous stages were
increased as 28%, 6% and 2.6%, respectively. It was found that
as the condenser temperature increases exergy efficiency
decreases and as the evaporator temperature increases exergy
efficiency increases.
1.st International Conference Energy Systems Engineering
ıcese'17
Yusuf Ziya Akman
Halil Kürşad Ersoy
Offshore wind energy is a powerful renewable energy
source. The floating platform systems are being developed to
increase the capacity of installed wind power, and to take
advantage of the high wind energy potential on the offshore
fields. This study is focused on the design of an offshore floating
platform system and on hydrodynamic analysis of the platform
mooring system for a 5 MW reference wind turbine. The
hydrodynamic model of the system has been developed and the
hydrodynamic analysis has been applied to the several
alternative designs. Behaviour of the floating platform and the
mooring system under different sea conditions were analysed
using a commercially developed computer program considering
the different mooring systems including the catenary mooring
and the tension leg. The effect of different mooring systems on
the motion and mooring load characteristics is presented and
discussed in detail.
1.st International Conference Energy Systems Engineering
ıcese'17
Sabri ALKAN
Power production of photovoltaic (PV) modules is
strongly depends on environmental conditions such as, solar
radiation, ambient temperature and wind speed. In other
words, PV operating point is changed with environmental
factors. Therefore, PV power prediction is significantly
important according to environmental conditions. One of the
most important issues of PV power prediction is PV operating
temperature estimations. While the rising PV module
temperature is its short circuit current slightly increases, it
causes on sharply decreases its voltage. Thus, power
production decreases. This study focuses on PV temperature
estimation methods such as, nominal cell operating
temperature (NOCT) model, Faiman model, Ross model, King
model, Muzathik model and finite differences. These methods
are reviewed and compared. Influence of the wind speed on the
PV module operating temperature and power production is
also investigated. Finally, advantages and disadvantages of the
methods are discussed. In all the models, it is reported that
while the results of the NOCT, Ross and King models are close
to each other’s, those of the Faiman and the remaining models
are respectively overestimated and underestimated.
1.st International Conference Energy Systems Engineering
ıcese'17
Cihan Demircan
Hilmi Cenk Bayrakçı
Ali Kecebas
Onur Vahip Güler
The problem of batteries in electric vehicles is one of
the biggest problems. Late charging and premature discharge of
the battery makes it difficult to travel to distant ranges on
electric vehicles. For this reason, it is necessary to regularly use
the energy that is charged in the battery. At the same time, the
torque to be produced in the electric vehicle must be sufficiently
low to oscillate and the torque must not sinusoidally move. The
fluctuation in torque also affects motor speed. Thus, it is
necessary to improve the speed control performance by reducing
the fluctuation of the torque the least. Direct Torque Control
(DTC) and field oriented control (FOC) methods become an
industrial standart for induction motor driving. The aim of this
paper is to compare the performance of field oriented and direct
torque control of 3-phase induction motor. Speed, torque, stator
currents, stator flux linkages, flux plane characteristic of
induction motor which is controlled by DTC and FOC methods,
are obtained from simulation applying reference speed to
induction motor. Furthermore, output energy and power by
induction motor, are calculated and plotted. The analysis of this
chracteristics are simulated by Matlab. İn this study, energy
efficiency is achieved by consuming less power through the
proposed method.
1.st International Conference Energy Systems Engineering
ıcese'17
Gökhan Bahadır
Onur Karaoğlu
Mustafa Aktaş
Intended to use of our country’s high wind energy
capacity studies with support under the Renewable Energy Law,
green energy investments continue. In this paper, based on this
law, a cost analysis simulation program, which calculates wind
energy costs according to selected location and turbine model,
was developed. This program help wind power plant’s both
economical and energy feasibility. In the part of financial
parameters, the developed tool calculate unit facility cost,
investment cost, capital expenditure, total and unit investment
cost, unit energy cost and unit operational and management cost.
In the power plant data part, installed power and yearly
produced amount of energy is obtained according to chosen
turbine model, region and turbine number.
1.st International Conference Energy Systems Engineering
ıcese'17
Kübra Nur Akpınar
Muammer Özdemir
Bu çalışmada, yer çekimi destekli bir ısı borusu
(termosifon) tasarlanarak imal edilmiş ve performansı deneysel
olarak incelenmiştir. Isı borusunda çalışma akışkanı olarak su ve
CuO/su nanoakışkanı kullanılmıştır. CuO/su nanoakışkanı için
ağırlıkça %1 ve %2 konsantrasyon oranlarında CuO
nanopartikülleri temel akışkan su içerisine karıştırılmıştır. Isı
borusu evaporatör bölgesine uygulanan ısı yükü ile buharlaşan
çalışma akışkanından ısı enerjisi kondenser bölgesinde soğutma
suyu tarafından çekilmiştir. Deneyler su ve CuO/su nanoakışkanı
için 400 W sabit ısı yükünde, 18, 27, 36, 45 ve 54 L/h soğutma
suyu debilerinde ve ısı borusunun 90 0C eğim açısında
gerçekleştirilmiştir. Deneylerde ısı borusu yüzey sıcaklıkları,
soğutma suyu giriş çıkış sıcaklıkları, soğutma suyu debisi
ölçülerek kaydedilmiştir. Deneysel ölçümler sonucu elde edilen
veriler kullanılarak ısı borusu performansı belirlenmiştir.
Hesaplamalar neticesinde elde edilen sonuçlara göre; %1CuO/su
ve %2CuO/su nanoakışkan kullanımı temel akışkan su
kullanımına göre performansta yaklaşık olarak sırasıyla %9 ve
%15 oranlarında iyileştirme yaptığı görülmüştür.
1.st International Conference Energy Systems Engineering
ıcese'17
Engin Gedik
Metin KAYA
Osman Mert
Bu çalışmada Kastamonu ili şartlarında direk genleşmeli
güneş destekli ısı pompasının (D-GDIP) su ısıtma ve mahal
ısıtma amaçlı uygulamalarındaki ısıtma performansı incelendi.
Evaporatör olarak 10 m2 güneş kollektörü belirlendi. Isı
pompasında akışkan olarak R-134a, su ısıtma uygulamasında
500 L hacmindeki su deposu seçildi. Sistemin ısıtma kapasitesi ise
10 kW olarak belirlenerek hesaplamalar yapıldı ve Kasım,
Aralık, Ocak, Şubat, Mart, Nisan ve Mayıs aylarındaki
performansı incelendi. Yapılan hesaplamalarda sistemin COP
değeri en fazla 3.38 ile Mayıs ayında 2.00 ile ise en düşük Aralık
ayında olduğu görüldü. Su deposunda ısıtma uygulamasında en
fazla sıcaklığa 94.5 °C ile Mayıs ayında ulaşılırken en düşük 44.4
°C ile Aralık ayında ulaşıldı.
In this study, the performans of the direct expansion
solar assisted heat pump water heaters (DX-SAHP) were
investigated in the Kastamonu region. 10 m2 solar collectors
were used in the system as an evaporator. R-134a were used in
the vapor compression cycle as a working fluid and 500 L water
reservoir were chosen for the energy storage system. Heating
capacity of the system were designed 10 kW. System assumed to
work in Nowember, December, January, February, March,
April, May and the required calculation were made accordingly.
The calculated results showed that COP of the system reached up
to 3.38 in May and decreased to 2.00 in the December. At the
water heater, the maximum temperature of the water was
achieved 94.5 °C in May and the lowest temperature was
calculated 44.4 °C in December.
1.st International Conference Energy Systems Engineering
ıcese'17
Ahmet Ümit TEPE
İsmail EKMEKCİ
Yaşar YETİŞKEN
Induction heating has many advantages over the
conventional heating systems. Therefore, it is used in many
applications from cooking in the kitchen to surface hardening in
the industry. In this study, an induction heating system is
designed to dry a metal pipe passed through the painting process.
The half-bridge inverter is used at the power stage of the system
and the power switches are turned on under ZVS conditions.
FLC is preferred to perform the closed-loop power control and
the switching frequency of the inverter is selected as the control
variable. The temperature of the pipe used as feedback to set up
the inputs of the FLC is set to the reference value of 50 °C. A
low-cost DSPIC microcontroller is used to operate the FLC,
digitize the feedback, and generate gate signals for the switches.
1.st International Conference Energy Systems Engineering
ıcese'17
Salih Nacar
Selim ÖNCÜ
Environmental friendly energy sources like solar,
fuel or wind cells provide low voltage levels. Grids work with
higher voltage levels so voltage step up is required before
connecting these new energy sources to grid. Conventional boost
converter is not able to provide a large DC gain. There are some
topologies available in literature which provides the required
high DC gain. This paper develops a MATLAB® toolbox for
analysis and design of two stage charge pump based boost
converter suggested by Liang, et al. (2013). Developed software
solves the converter’s differential equations and draws the
circuit’s different waveforms. So, selection of components can be
done easily using these information. Developed software also
calculates the small signal transfer functions. So, controller
design can be done easily using MATLAB’s control system
toolbox. Contact corresponding author to receive the software.
1.st International Conference Energy Systems Engineering
ıcese'17
Farzin Asadi
Nurettin Abut
, Mehmet Keskin Kılıç
Bu çalışmada, saflaştırıcıdan soğurucuya dönen, sıcaklığı
azalmış fakir karışımın ısı değiştiricisinden geçerken sıcaklığının
arttırılmasını sağlamak amacıyla DAS sistemlerinin termal
kompresör bölgesinde bulunan ısı değiştiricisinin modellemesi
yapılmıştır. Sistemde soğutucu-soğurucu akışkan çözeltisi olarak
NH3-H2O (%25-%75) kullanılmıştır. Analiz için kanatçıklı ve
ticari olarak kullanılan kanatsız (düz borulu) ısı değiştiricisi
modellenmiştir. Tasarlanan ısı değiştirici kanatçıkları düz
tasarlanmış olup fakir eriyiğin temas ettiği boru cidarının dış
yüzeyine yerleştirilmiştir. Tasarlanan eşanjör sonlu hacimler
metoduna göre çalışan HAD programı olan Fluent yazılımıyla,
sayısal analizi yapılmış ve sistem COP’unun hesaplamasında
kullanılan kaynatıcı sıcaklıkları bulunmuştur. Kanatlı ve
kanatsız ısı değiştiricilerin ısıl performansları karşılaştırılmıştır.
Kanatsız ısı değiştiricisinde kaynatıcı sıcaklığı ortalama 150.09°C
olarak belirlenmiştir. Tasarımlanan kanatlı ısı değiştiricisinde ise
bu değer ortalama 157.21°C bulunmuştur. Yapılan çalışmayla
kaynatıcı sıcaklığında %3.3’lük bir atış sağlanmıştır. Bu sıcaklık
artışıyla, sistem çalışması için verilen ısı kaynağından
yararlanma oranı ve sistemin performansının iyileştiği
belirlenmiştir.
In this study, the heat exchanger in the thermal
compressor zone of the DAS systems was modeled to increase the
temperature while passing through the heat exchanger of the
lean mixture, which returns from the purifier to the absorber.
NH3-H2O (25% -75%) was used as the refrigerant-absorbing
fluid solution in the system. The winged and commercially
available wingless (flat pipe) heat exchanger is modeled for
analysis. The designed heat exchanger fins are designed in a
straight line and placed on the outer surface of the pipe wall
where the poor melt contacts. Numerical analysis was performed
with the Fluent software, which is a HAD program operating
according to the designed heat exchanger finite volume method,
and the boiler temperatures used in the calculation of the system
COP were found. The thermal performances of poultry and
wingless heat exchangers have been compared. The average
temperature of the boiler in the wingless heat exchanger was
determined as 150.09°C. For the designed finned heat exchanger
this value was found to be 157.21°C on average. With the work
done, a shot of 3.3% was obtained at the boiler temperature.
With this increase in temperature, the utilization rate of the heat
source provided for the system operation and the improvement
of the performance of the system have been determined.
1.st International Conference Energy Systems Engineering
ıcese'17
Önder ŞAHİN
Engin Özbaş
Tayfun MENLİK
Adnan Sözen
Dilek KALE
The speed control of electric motors has been a
reseach subject since the induction machines were developed. At
the last years, recent studies on induction motors have focused on
field oriented control and direct torque control methods, which
provide high performance control and are based on vector
control. In this study direct torque control of induction motor
was simulated by using mathematical model. Later, DSP based
vector control of induction machine was performed
experimentally thanks to designed an inverter circuit. In addition
to operation on motor mode, induction machine was operated in
regenerative braking by operating on generator mode and thus,
recovery of energy was provided
1.st International Conference Energy Systems Engineering
ıcese'17
O. Metin
M. Aktaş
H. Aygün
—The plate heat exchangers are commonly used for
process heating and cooling applications in chemical, food
processing and pharmaceutical industries. In this study, the first
law (energy) analysis was performed theoretically and the heat
efficiencies were compared under similar operating parameters
of the counterflow plate heat exchangers with 30o, 45o and 60o
chevron angles using water-water pairs
1.st International Conference Energy Systems Engineering
ıcese'17
M. A. Ersöz
Abdullah Yıldız
Heat transfer from/to the metal hydride bed is a
significant factor affecting the performance of metal hydride
storage tanks (MHSTs for short). This study presents a novel
design for metal hydride tank equipped with a heat pipe. The
experimental study explains the use of heat pipe to enhance the
heat transfer in MHST, which built using LaNi4.75Al0.25 as the
storage media and under various hydrogen pressure supplies in
range of 2 to10 bar. This study also presents comparisons
between the two different MHSTs which are designed with and
without heat pipe. Methanol is used as a working fluid inside the
heat pipe. Results show that the usage of heat pipes can be a good
choice to increase hydrogen storing performance in both
absorption and desorption. The absorption time at 10 bar
hydrogen inlet pressure was reduced more than 30%, and the
mass of hydrogen storage increased by 15%
1.st International Conference Energy Systems Engineering
ıcese'17
Muhammet Kayfec
Fawzi ELHAMSHRI
Gökan OZKUL
This study investigates the heat transfer
enhancements of CuO nanofluid according to nanoparticle size.
For maximum heat transfer enhancement, optimum nanoparticle
diameter is going to be found. In this numerical study, forced
convection nanofluid flow in a 0.01-m x 0.01-m cross-sectioned
and 3-m long square duct under turbulent flow regime was
investigated. Constant heat flux of 20 kW/m2 was applied to the
surfaces of the duct. CuO/water nanofluid was used in analyses
to enhance the convective heat transfer of the base fluid.
Thermo-physical properties of nanofluid are constant. Analyses
were performed for Reynolds numbers between 104 and 105, also
for volume concentrations between 0% and 4%. The finite
volume discretization method was used to solve the governing
equations. Single phase model was considered. Thermophysical
properties of the nanofluid were found thanks to the single phase
correlations which depended on nanoparticle diameter. The
effects of nanoparticle diameter on velocity distribution, average
Nusselt number, and average Darcy friction factor were
investigated in detail. The results indicate that higher volume
concentrations of CuO/water nanofluid offers more average
convective heat transfer enhancement. Higher nanoparticle size
nanofluids offer lower enhancement
1.st International Conference Energy Systems Engineering
ıcese'17
Mutlu TEKİR
Recep EKİCİLER
Kamil ARSLAN
For this experiment, a spark ignition engine designed
to use gasoline has been modified to use LPG, so it has become
bi-fuel engine. Catalyst temperature for different speeds and
engine loads is evaluated. Thanks to an OBD2 diagnostic
interface and its specific software, a handful of sensors of the car
can be reached.
It is widely accepted that LPG causes overheating of engine, and
so LPG converted engines have lower lifespan. In order to
evaluate the effect of LPG on catalyst, catalyst temperatures are
used. Experiments are executed under real life driving
conditions, on a straight track at various speeds using cruise
control feature for more accuracy.
The results indicate that there isn’t any significant temperature
increase when the engine is running on LPG. Most important
reasons of increasing temperature in cylinders are incorrect
air/fuel ratio under LPG operating conditions, and lack of
control over advance timing on LPG. Reasons of this are going to
be discussed further
1.st International Conference Energy Systems Engineering
ıcese'17
Mutlu TEKİR
Current-Voltage (I-V) and Power-Voltage (P-V)
characteristic of Photovoltaics (PV) modules are important issues
in order to provide maximum power point (MPP) of PV. I-V and
P-V characters are related to the environment, which certainly
means that the efficiency of these cells affected by the
environmental factors like temperature, radiation, dust, etc.
Most recent trends in solar design use computer modeling to
connect solar lighting systems, solar heat and ventilation
considering weather data due to their effects on the solar cell
performance. This paper presents the modeling and simulation
of PV module using the MATLAB/ Simulink for calculating and
plotting the I-V and P-V characteristics of PV module. Datasheet
parameters of Mitsubishi PV-UD190MF5 PV module has been
used for simulation. Effects of irradiance, temperature and
connection types on the PV efficiency are investigated. The
output performance of the PV panels is evaluated under different
test conditions.
1.st International Conference Energy Systems Engineering
ıcese'17
E. Aza Khan
Ahmet Doğan
Mustafa Alçı
Biyogaz tesislerinde organik atıklarının
değerlendirilmesi ile metan gazı üretilmekte ve elde edilen
metan gazı ise kojenerasyon sistemlerinde ısı ve elektrik
enerjisine dönüştürülmektedir. Biyogaz üretim ve
kojenerasyon sisteminde kullanımı için ölçme ve kontrol
sistemi gerekmektedir. Bu kapsamda basınç, seviye,
sıcaklık ölçümleri yapılmakta ve biyogaz içeriği analiz
edilmektedir. Ölçüm sisteminden alınan bilgiler
doğrultusunda pompa, karıştırıcı, blower ve ısıtma sistemi
kontrol edilmektedir. Bu çalışmada, endüstriyel bir
biyogaz tesisinde kullanılan ölçüm ve kontrol sistemi
ayrıntılı olarak ele alınmıştır
Biogas is produced by evaluating the organic
wastes in the biogas plant. The obtained biogas is
converted into heat and electricity energy in the
cogeneration systems. A measurement and control system
is required for use in biogas production and cogeneration
systems. In this scope, pressure, level, temperature
measurements are made and biogas content is analyzed.
The pump, mixer, blower and heating system are
controlled according to the information obtained from the
measuring system. In this study, the measurement and
control system used in an industrial biogas plant is
discussed in detail
1.st International Conference Energy Systems Engineering
ıcese'17
Fatih Mehmet KAYA
Muharrem EYİDOĞAN
Durmuş KAYA
In this study, the optimum run time of each electrical
appliances is scheduled to reduce the total energy consumption
cost in smart homes and to flat the electrical load curve. The
participation of residents in the price-based Demand Response
(DR) program through the time-varying price tariffs, largely
determines their energy consumption habits. The energy
management for the smart home, which includes distributed
generation, energy storage system, electric vehicle (EV) and
controllable electrical appliances is optimized by using genetic
algorithm method. Thanks to bidirectional power flow
technology, the excess energy of EVs, considered as a mobile
energy storage system and the distributed generation unit, can be
transferred to the smart home or to the grid. EVs are an
important option to supply energy demands at smart home
during peak hours and to eliminate instabilities such as voltage
drop and frequency fluctuation that may occur in the grid
1.st International Conference Energy Systems Engineering
ıcese'17
Efe Isa Tezde
H. Ibrahim Okumus
In this study, regression learning methods such as
linear regression, linear Support Vector Machines (SVM) and
Gaussian SVM are used to estimate the wind speed on monthly
time series. The wind speed data is consisted of ten-minute bars
taken from the wind central in Zonguldak province in Turkey. In
the pre-processing stage, Moving Average (MA), Weighted MA
and Exponential MA filters are performed by using between 3
and 10 delay times on the wind speed data set. The data range is
converted to the range [0, 1] in the normalization operation.
Three different regression methods are used to estimate the wind
speed. In the training phase of the models 10-fold crossvalidation method is used. The performance of the models is
compared with statistical indicators such as Mean Absolute
Error (MAE), Mean Squared Error (MSE) and Root Mean
Squared Error (RMSE). The minimum estimation error value is
determined for used models. It has been observed that Gaussian
SVM model approach gives the least error to estimate wind
speed with MA filters and delay steps when compared to other
methods
1.st International Conference Energy Systems Engineering
ıcese'17
Seçkin Karasu
Aytaç Altan
Zehra Saraç
Rıfat Hacıoğlu
The heat transfer characteristics of the heat
transfer devices can be enhanced by changing the properties and
flow features of working fluids. In this regard, heat transfer
characteristics of a two–phase closed thermosyphon (TPCT) with
clinoptilolite/water nanofluid are experimentally determined for
3 different particle size of clinoptilolite nanoparticles, that is 50
nm, 340-370 nm and 450-500 nm, respectively. The TPCT is
fabricated from the copper tube with the 13 mm inner and 15
mm outer diameters, whereas the length of it is 1 m. The
experimental work was carried out under different operating
conditions ranging from 200 W to 400 W and 5 g/s to 10 g/s for
the heater power and coolant mass flow rate, respectively. The
input parameters such as effects of mass flow rates of cooling
water, heater power and thermal resistance of the TPCT were
investigated. It is observed that the efficiency of the TPCT
increases when clinoptilolite/water nanofluid was used as the
working fluid instead of deionized water. Moreover, the
maximum enhancement in the thermal performance was
obtained as approximately 16% for all conditions in the
experiments in which TPCT was charged with the nanofluid as
the working fluid.
1.st International Conference Energy Systems Engineering
ıcese'17
E. Y. GÜRBÜZ
Erdem ÇİFTÇİ
Adnan Sözen
U. KARAKAYA
The electrical efficiency of photovoltaic panels
decreases as the temperature of PV cells increases as a result of
converting most of the absorbed solar energy to heat, which
needs to be dissipated effectively and economically. In this study,
a sheet of 0.25 mm silicon isolator type Sil-Pad 400 supplied by
Henkel Electronics materials company with thermal conductivity
of 0.9 W/m.K was laminated at the back of solar cells instead of
tedlar layer to enhance the thermal conductivity of PV panel
back layers. The constructed silicon isolator PV panel is outdoor
tested at the same time with another standard PV panel having
the same parameters under the same conditions and in the same
position and location. The experimental results showed an
improvement in electric power generation and cells temperature
for the constructed silicon isolator panel. The front surface
temperature of the silicon isolator panel was lower than that of
standard panel by 8 °C to 1.5 °C, where the back surface
temperature of the silicon isolator panel was 6 °C to 1 °C lower
than that of standard panel. The overall average increase in
power generation for silicon isolator panel was about 13% with
respect to the standard panel.
1.st International Conference Energy Systems Engineering
ıcese'17
Muhammet Kayfec
Salaheldin ALOUS
Ali Uysal
Bu çalışmada bir kurutma işlemi için farklı geometrik
yapıya sahip güneş enerjili ısı boruları karşılaştırılmıştır. Bunun
için oval (O-Tipi) ve dairesel (D-Tipi) iki tip ısı borusu imal
edilmiştir. Isı boruları aynı özelliklere sahip silindirik yapıdaki
iki adet kurutma haznesine yerleştirilmiştir. Haznenin boş
bırakıldığı deneylerde en yüksek ısıtıcı sıcaklığı O-Tipinde
199.3°C, D-Tipinde ise 190.4°C olmuştur. Kurutmanın yapıldığı
deneylerde ise taze nane ve taze kırmızıbiber kullanılmıştır. DTipi kurutucuda taze nane ağırlıkça %77.39 kurutulurken, OTipinde %84.36 kurutma sağlanmıştır. Kırmızıbiber için yapılan
deneyde D-Tipinde ağırlıkça %27.12 kurutma sağlanırken, OTipinde %39.74 kurutma gerçekleşmiştir.
1.st International Conference Energy Systems Engineering
ıcese'17
Engin Özbaş
Adem Bozkır
Bu çalışmada aynı hidrolik çapa sahip fakat farklı kesitli
mikrokanallarda hesaplamalı akışkanlar dinamiği (CFD) analizi
gerçekleştirilmiştir. Mikrokanalın geometrisi istenen
performansı elde etmek için önemli bir tasarım değişkenidir.
Günümüzde çoğu mikrokanal deneme yanılma yöntemiyle
tasarlandığından, sistematik bir optimal geometrik tasarım
yöntemi oluşturma ihtiyacı vardır. Hesaplamalı akışkanlar
dinamiği (CFD), mikrokanalların şeklinin, akış alanında, ısı ve
kütle taşınımı olayları üzerinde etkisini titizlikle incelemek için
sıklıkla kullanılır. Bu çalışmada pürüzsüz mikro kanallarda tek
fazlı akış ve ısı transferini incelemek için ticari bİr yazılım olan
Fluent 16.0 kullanılarak nümerik çalışma yapılmıştır. Dört
farklı geometrili; (1) kare kesitli (2) üçgen kesitli (3) dairesel ve
(4) dikdörtgen kesitli mikrokanallar için sayısal analizler
gerçekleştirilmiştir. Tüm mikro kanalların hidrolik çapları 100
μm ve uzunluğu 10 cm'dir. Sayısal analizde ısı transferi, çıkış
sıcaklığı ve basınç düşümü hesaplanarak farklı geometriler için
karşılaştırma yapılmıştır.
1.st International Conference Energy Systems Engineering
ıcese'17
Zeynep KÜÇÜKAKÇA MERAL
Nezaket PARLAK
Son yıllarda fotovoltaik sıcaklığının kontrolü için
uygulanan en önemli iki yöntem faz değişim malzemesinin panele
entegresi ve hava kanalları içerisinden zorlanmış taşınım ile fazla
ısının alınmasıdır. Faz değişim malzemesi içeren panel
tasarımında güç üretim miktarını belirleyen önemli tasarım
parametreleri; faz değişim malzemesinin cinsine bağlı olarak
değişen erime sıcaklığı, faz değişim malzemesinin kütlesi
belirleyen kalınlığı ve fotovoltaik panelde kullanılan yarıiletken
cinsi parametreleridir. Çalışmada İzmir ili ortam şartlarında
bulunan faz değişim malzemeli fotovoltaik panel sistemi tasarımı
ve optimizasyonu gerçekleştirilmiştir. Bu kapsamda, fotovoltaik
panel sistemlerinin performansını belirleyen en önemli etken
olan güç üretim miktarının yanında bu tür sistemlerin
uygulanabilirliğini önemli ölçüde etkileyen maliyeti de göz
önünde bulundurulmuş, her iki faktöründe en iyilendiği bir
tasarım belirlenmesi amaçlanmıştır.
1.st International Conference Energy Systems Engineering
ıcese'17
Şebnem Yılmaz Balaman
Cem Kalkan
Tugay Aşkın Ateş
Mehmet Akif Ezan
It is well known that the efficiency of PV panels vary
under temperature changes and the high temperature decreases
the power output of PV panels. There are some technical
solutions to lower the temperature of PV panels. One of them is
using the Earth-Air Heat Exchanger (EAHX). EAHX systems
used for cooling the air in summer and heating in winter by using
the energy that soil has. EAHX can supply cool air in order to
decline the temperature of PV panels. In this study, the PV panel
was cooled with cool air which is obtained from EAHX. The
temperatures of Monocrystalline PV panels with EAHX and
without EAHX, air velocity and the solar radiation were
measured in Şanlıurfa, Turkey which has hot and dry climatic
conditions. The Current- Voltage (I-V) Characteristic Curves are
also determined during the experimental study. The measured
results of PV panels with EAHX and without EAHX were
compared each other. It was determined that the surface
temperature of the cooled PV panel decreased by about 20 ° C
and the power obtained from the panel increased by 5 %.
Consequently, it was observed that the high temperature has
negative effect on the power produced from PV panels and
EAHX can be used for cooling PV panels in order to produce
more energy.
PV panellerin verimliliğinin sıcaklık değişimleri altında
farklılık gösterdiği ve yüksek sıcaklığın PV panellerden elde
edilen gücü olumsuz etkilediği bilinmektedir. PV panellerin sahip
olduğu yüksek sıcaklığı düşürmek için bazı teknik çözümler
bulunmaktadır. Bunlardan biri de Toprak-Hava Isı Değiştirici
(THID) sistemlerinin kullanılmasıdır. THID; toprağın sahip
olduğu enerjiyi kullanarak, yazın havanın soğutulması, kışın ise
ısıtılması için kullanılan sistemlerdir. THID; PV panelin
sıcaklığını düşürmek amacıyla soğuk hava sağlayabilir. Bu
çalışmada PV panelin yüzey sıcaklığı THID’ den elde edilen
soğuk hava ile düşürülmüştür. THID sistemi kullanılan ve
kullanılmayan monokristal PV panellerin sıcaklığı, hava hızı ve
güneş ışınımı değerleri sıcak ve kuru bir iklime sahip olan
Şanlıurfa ili için hesaplanmıştır. Ayrıca Akım-Gerilim (I-V)
Karakteristik Eğrileri, deneysel çalışma sırasında tespit
edilmiştir. THID kullanılan ve kullanılmayan PV panellere ait
ölçüm sonuçları kendi içinde karşılaştırılmıştır. Soğutulan PV
panelin yüzey sıcaklığının yaklaşık 20°C azaldığı, panelden elde
edilen gücün ise % 5 arttığı belirlenmiştir. Sonuç olarak yüksek sıcaklığın PV panellerden üretilen gücü olumsuz etkilediği ve
THID’ nin daha fazla enerji üretmek için PV panelleri soğutmak
amacıyla kullanılabileceği görülmüştür.
1.st International Conference Energy Systems Engineering
ıcese'17
Y. Demirtaş
H. Bulut
Y. İşıker
M.A. İlkhan
Kurutma, tarımsal ürünlerin bozulmadan korunması
için kullanılan en eski yöntemdir. Kurutma işlemi ile birlikte
gıda ürünlerindeki su aktivitesi değeri düşer. Böylece gıdaların
bozulma süreci yavaşlar. Endüstriyel talepleri karşılayacak
birçok kurutucu modeli geliştirilmiştir. Bu kurutucu
yapılarından biri de akışkan yataklı kurutuculardır. Akışkan
yataklı sistemlerin temel prensibi, kurutulacak tanecikli
ürünlere akışkan özelliklerine benzer özellikler
kazandırılmasıdır. Bu sistemlerde kurutulacak ürünler akışkan
bir ortam (hava) içinde askı halinde tutulurken kuruma işlemi
gerçekleşir. Akışkan yataklı kurutucularda kurutma havası
ürünün her bir noktasına homojen olarak dağılır. Bu nedenle
bu kurutucular yüksek bir kurutma performansına sahiptirler.
Ayrıca bu tip kurutucular, ülkemizde bol miktarlarda bulunan
bakliyat, tahıl gibi ürünlerin kurutulmasında da çok
kullanışlıdırlar. Bu çalışmada, literatürde bulunan ve gıda
kurutulmasında kullanılan farklı yapılardaki akışkan yataklı
kurutucular incelenmiştir.
Drying is the oldest method used for the protection
of agricultural products. With the drying process, the water
activity in the food products is reduced. Thus, the degradation
process of foods slows down. Many dryer models have been
developed to meet industrial demands. One of these dryer
structures is fluid bed dryers. The basic principle of fluidizedbed systems is to impart properties similar to fluid properties to
the granular products to be dried. In these systems the drying
process takes place while the products to be dried are
suspended in a fluid environment. In fluidized bed dryers, the
drying air is homogeneously distributed at each point of the
product. For this reason, these dryers have a high drying
performance. These types of dryers are also very useful for
drying crops such as pulses and grains, which are abundant in
our country. In this study, fluidized bed dryers in the literature
and in different structures used for food drying were
investigated.
1.st International Conference Energy Systems Engineering
ıcese'17
Ali Etem Gürel
İlhan Ceylan
Doğancan Uz
Son In recent years, the decline in energy
resources has led to the need for efficient use of these resources.
Power factor correction is a very important issue in the efficient
use of energy. A large majority of today's loads are working with
the direct current and they take their energy from the grid
through a power electronic circuit. These power electronic
circuits are circuits that distort the power factor. Power factor
correction (PFC) is required according to international
standards (EN61000-3-2). Power factor correction circuits which
using electronic circuits and control circuits have become much
cheaper and more efficient than conventional methods. Active
PFC circuits can keep the power factor in the range of 0.95-0.99
and the total harmonic distortion (THD) below 5% under wide
voltage and load values. In power factor correction applications,
numerical control allows the implementation of complex
algorithms. It brings the use of flexibility and simplified circuit
structure. In this study, Boost-PFC Converter simulated in
Matlab-Simulink environment based on selected parameters was
performed.
Son yıllarda, enerji kaynaklarının azalması, bu
kaynakların verimli kullanılması zorunluluğunu doğurmuştur.
Enerjinin verimli kullanılmasında güç faktörünün düzeltilmesi
oldukça önemli bir konudur. Günümüzdeki yüklerin büyük bir
çoğunluğu doğru akımla çalışmaktadır ve enerjilerini bir güç
elektroniği devresi üzerinden şebekeden alırlar. Bu güç
elektroniği devreleri güç faktörünü bozan devrelerdir. Güç
faktörünün düzeltilmesi (PFC) uluslararası standartlara
göre(EN61000-3-2) zorunludur. Elektronik devre ve kontrol
devreleri kullanarak güç faktörü düzelten devreler, klasik
yöntemlere göre çok daha ucuz ve verimli hale gelmiştir. Aktif
PFC devreleri geniş gerilim ve yüklenme değerlerinde güç
faktörünü 0.95-0.99 aralığında ve toplam harmonik
bozunumu(THD) %5’in altın da tutabilmektedir. Güç
faktörünün düzeltilmesi uygulamalarında sayısal kontrol,
karmaşık algoritmaların gerçekleştirilmesine olanak sağlamakta,
kullanıma esneklik getirmekte ve devre yapısı basitleşmektedir.
Bu çalışmada, seçilen parametrelere göre yükseltici tip güç
katsayısı düzelten dönüştürücünün (Boost-PFC Converter)
benzetimi Matlab-Simulink ortamında gerçekleştirilmiştir.
1.st International Conference Energy Systems Engineering
ıcese'17
Mert Lama
Tarık Erfidan
M. Zeki Bilgin
Bu çalışmada güneş enerjili doğal akışlı ısıtıcı tipleri ile
termoelektrik jeneratörden elektrik üretimi deneysel olarak
incelenmiştir. O-Tipi, T-Tipi ve C-Tipi olmak üzere üç farklı
yapıdaki doğal akışlı ısıtıcılar vakumlu cam tüp içerisine
yerleştirilerek termoelektrik jeneratörlerin güneş enerjisiyle
ısıtılması sağlanmıştır. Termoelektrik jeneratörlerin soğutma
işlemi ise demir yüzeyden hava temasıyla sağlanmıştır. Deneyler
sonucu en yüksek açık gerilim değerleri O-Tipi, T-Tipi ve C-Tipi
ile sırasıyla 0.15V, 0.22V ve 0.21V olarak gerçekleşmiştir.
1.st International Conference Energy Systems Engineering
ıcese'17
Engin Özbaş
Bu çalışmada güneş enerjili ısı borularında yansıtıcı
kullanımının etkisi deneysel olarak karşılaştırılmıştır. Bunun için
aynı özelliklere sahip üç adet ısı borusu imal edilmiştir. Su
ısıtmasında kullanılan ısı borularının buharlaştırıcı bölgelerine
5lt’lik su depoları bağlanmıştır. Isı boruları yansıtıcısız, yarımyansıtıcılı ve tam-yansıtıcılı olmak üzere aynı anda deneysel
olarak karşılaştırılmıştır. Yapılan deneyler sonucu en yüksek
depo suyu sıcaklığı yansıtıcısızda 53.0°C, yarım-yansıtıcılıda
58.8°C ve tam-yansıtıcıda 66.7°C olmuştur.
1.st International Conference Energy Systems Engineering
ıcese'17
Engin Özbaş
Bahadır ACAR
Üretim ve tüketim sistemini besleyen enerjinin petrol ve
doğalgaz gibi sınırlı yakıtlardan elde edilmesi dünyanın
geleceğini tehdit etmektedir. Fosil yakıtla beslenen araçlardan
doğaya salınan sera gazları da azımsanacak seviyede değildir.
Dünya çapında bu duruma karşı önlem alınması için fosil yakıtlı
araçlardan elektrikli araçlara geçilmesi hedeflenmiştir. . Bu geçiş
döneminde hibrit araçlar, elektrikli araçlara geçişin ilk adımını
oluşturmaktadır. Hibrit araçlarda elektrikli motor ile benzinli
motorun devreye girmeleri farklı modlarda ve koşullarda
olmaktadır. Her marka ve modelin işletme şartları farklı
olmakla birlikte hemen hemen tamamında güzergah bilgisine
göre bir işletme yapılmamaktadır. Bu çalışmada, hibrit
araçlarda elektrik enerjisinin kullanımını en yüksek seviyede
tutarak, fosil yakıt kullanımını en aza indirmek amaçlanmıştır.
Amaca yönelik olarak bir enerji yönetim algoritması
oluşturulmuştur. Sürücünün belirleyeceği güzergah için
similasyonun önceden yapılıp, mevcut batarya durumu, yol ve
sürüş bilgilerine göre optimum işletme şartları belirlenmiştir.
Yol benzetimi ile elektrik motorunun motor/generatör çalışacağı
bölgeler belirlenmiş, bu bölgelerde harcanan ve geri kazanılan
güçler hesaplanarak benzinli motora mümkün olan en az
kullanım imkanı verilerek elektrik enerjisinin daha verimli
kullanımı sağlanıp yakıt tasarrufu yapılmaya çalışılmıştır. Aynı
güzergah için önerilen yöntem ile mevcut yöntem sonuçları
karşılaştırılıp avantajlar ve yapılacak yakıt tasarrufu
bulunmuştur.
Achieving energy from the limited fuel, such as oil
and natural gas, that feeds the production and consumption
system threatens the future of the world. The greenhouse gases
released into the environment from vehicles exhaust is also at a
dismal level. In order to take measures against this situation, it is
aimed to switch from fossil fueled vehicles to electric powered
vehicles. . During this transition period, hybrid vehicles are the
first step towards the transition to electric vehicles. In hybrid
vehicles there are different modes and different conditions in
which the electric motor and the petrol engine are switched on.
Not all brands and models are operating in accordance with the
route information with the operating conditions being different.
In this study, it is aimed to minimize the use of fossil fuel by
keeping the usage of electric energy at the highest level in hybrid
vehicles. An energy management algorithm was created for the
purpose. Simulation for the route to be determined by the driver
is made in advance and optimum operating conditions are
determined according to the current battery condition, road and driving information. By means of the road simulation, the
regions where the motor / generator will work for the electric
motor are determined and the consumed and recovered powers
are calculated and the gasoline motor is given the least possible
usage possibility. The proposed method and the results have been
compared with the classical methods and their outcomes used
previously as stated in the literature review, And that clarified
explicitly the advantages of the proposed method and its ability
to get a big value from ecominal point of view and energy save
1.st International Conference Energy Systems Engineering
ıcese'17
Eyyüp Aslan
M. Zeki Bilgin
Tarık Erfidan
Tek enerji kaynağının kullanıldığı sistemlerin bir
zayıf noktası, yenilenebilir enerji kaynaklarının her coğrafi
konum ve yerleşimde erişilebilir olmamasıdır. Iki ya da daha
fazla yenilenebilir enerji sisteminin bütünleşik olarak çelıştığı
hibrit sistemlerde enerji kaynaklarından biri mevcut
olmadığında, var olan diğer kaynağı kullanarak bu sorunun
üstesinden gelinebilir. Buna ek olarak yenilenebilir enerji üretim
projelerinin yatırım maliyetleri, teknolojik olgunluk nedeniyle
fosil yakıtlı enerji üretim projelerine göre genellikle daha
yüksektir. Bu çalışmada, tüm bu olumsuzluklar göz önünde
bulundurularak, yenilenebilir enerji sistemi seçimi ve
optimizasyonu için bir karar modeli geliştirilmiş, geliştirilen
karar modelinin uygulaması bir firmanın var olan enerji
sisteminin yenilenebilir enerji sistemine dönüştürülmesi amacıyla
yapılmıştır.
1.st International Conference Energy Systems Engineering
ıcese'17
Şebnem Yılmaz Balaman
İrem Boylu
Hatice Üstündağ
Hasan Selim
A SEPIC (single-ended primary inductance converter)
DC-DC converter has become popular in recent years
particularly some applications where output voltage may be
above or below the converter input voltage. In this paper, the
interleaved SEPIC converter with coupled inductors is designed
and employed in photovoltaic (PV) system applications for
maximum power point tracking. The interleaved SEPIC is
constructed as two parallel conventional converter module. Thus,
the controller generates two PWM control signals with 180
degrees out of phase. In the designed SEPIC, the peak-currentmode controller is employed to control each inductor current
according to inductor current references (IL1 and IL2). The sum
of the inductor currents is the input (PV) current. In this study,
MPPT process is realized the reference voltage (Vref) generated
from MPPT algorithm is directly applied the PI controller, and
thus ILref is obtained for peak-current-mode-controller. The
system is analyzed for sudden irradiation varying conditions and
sudden load change. Simulation results show that the proposed
converter is very efficient in the MPPT process and has a fastdynamic response due to the peak-current-mode-controller and
the PI controller.
1.st International Conference Energy Systems Engineering
ıcese'17
Onur BIYIKLIOĞLU
Murat Ünlü
Sabri Çamur
Hydrothermal carbonization (HTC) is a
thermochemical conversion process, which is applied to biomass
to enhance its fuel properties. As a basis, HTC is a thermal
degradation process in the presence of water under moderate
temperature (200-280°C) and corresponding pressure. Despite
the fact that the high content of moisture is a disadvantage for
the traditional methods, it is an advantage for HTC.
This study mainly focuses on producing a fuel, a hydrochar,
which is produced from orange peel wastes from orange juice
production facilities. Due to the reason that HTC is mainly
affected from retention time and biomass/water ratio,
experiments were done at constant temperature (220°C) but at
variable retention times (1h, 3h, 5h) and biomass/water ratio
(10g /0 ml, 10 g/10 ml, 10 g/15 ml). Based on results, it is clear
that volatile content was decreased and fixed carbon percentage
was increased at all HTC applications. Moreover, HTC resulted
in hydrochars with higher calorific values. Among the results,
the best conditions, which provide lowest volatile matter (46.3%),
highest fixed carbon content (49.4%), are the retention time of 5
hours and biomass/water ratio of 10g/10ml. Based on FT-IR
results, at all HTC conditions experimented, hemicellulose
degradation was clear, due to the disappearance of 1732 cm-1
band of C=O vibration. Moreover all of the hydrochar samples
represented vibrations at 1694-1697 cm-1 denoting carboxylic
acid and their esters (COOH and -COOH3) on the surface.
As a conclusion, hydrochar samples obtained from orange peel
wastes can be regarded as good fuel candidates in terms of their
surface characteristics, volatile matter, fixed carbon content and
heating value
1.st International Conference Energy Systems Engineering
ıcese'17
Sibel Başakçılardan Kabakcı
Medya Hatun Tanış
Circulating Fluidized Bed Boilers (CFBB) provide the
most suitable combustion system for efficient and clean burning
and gasification of low quality lignite. In this study, the bed
material volume fraction, temperature and the pressure
distribution in the furnace were investigated by burning four
different types of coal in a ÇAN TS furnace geometry
underspecified boundary conditions. A CPFD(Computational
Particle Fluid Dynamics)method was used for the numerical
analyzes in this study. A MP-PIC (Multiphase-Particle in Cell)
method was used to solve gas-solid multiphase flows in the
numerical analyzes. An EMMS-YANG 2004 drag model, a
SIMPLE solution algorithm, a Particle Donor Cell Differencing
discretization method and the LES turbulence method were also
used in the numerical analyzes. Time steps for the numerical
analyzes were taken every 5 s, and the analyzes were
performed over 200 seconds. The numerical models were verified
by ÇAN TS experimental results. The temperature, pressure,
particle velocity and bed material volumetric ratio distributions
in the CFBB combustion chamber were compared for four
different lignites. The study results showed that the average sand
volume ratio in the base of the furnace and in the combustion
chamber varied from 0.4 to0.6, but after secondary air
combustion was used in the furnace, the volume ratio of sand in
the furnace’s combustion chamber changed from 0.07 to 0.10.
1.st International Conference Energy Systems Engineering
ıcese'17
Osman İPEK
Barış GÜREL
Mehmet KAN
This paper proposes an improved MPPT controller
without system dependency. This controller consists of three
stages which are initialization, action and perturb and observe
(P&O) algorithm. First, value of solar irradiance is estimated by
measuring PV current under certain condition. Then, a look-up
table is used to calculate duty ratios in the action stage. Finally,
P&O algorithm is used to complete MPPT precisely. To validate
the superior performance of the proposed MPPT controller, a
single ended primary inductance converter (SEPIC) and MPPT
system are modelled in MATLAB/Simulink environment.
Besides that, experimental results show that proposed controller
has better performance compared with P&O algorithm.
1.st International Conference Energy Systems Engineering
ıcese'17
Mustafa Engin Başoğlu
Bekir Çakır
Hydrogen storage is still one of the most important
problem for hydrogen energy, this problem has been resolved
highly by using carbon based materials in recent years. Carbon
nanotubes have been targeted by coating with various adsorbent
materials, transition metals and some compounds to realize this
storage at maximum level. In this study, alumina doped multiwalled carbon nanotubes were synthesized. The characteristics,
polarizations and thermal properties of the synthesized
nanotubes have been investigated. It was observed that the bonds
of the nanotubes, with the alumina addiction, surface area
increased and the hydrogen storage was realized at higher level.
Hydrogen energy was stored to the carbon nanotubes, in which
surface areas modified by alumina addiction was investigated. As
a result, it is seen that alumina doped multi-walled carbon
nanotubes will be useful in the field of hydrogen storage and can
be used efficiently in this area.
1.st International Conference Energy Systems Engineering
ıcese'17
Songül Kaskun
Muhammet Kayfec
In this study, the optimum insulation thickness, total
cost, energy saving, payback period and the environmental
pollution resulting from fuel consumption for heating purposes
were investigated as a case study for Ankara. Extruded
polystyrene (XPS) foam, expanded polystyrene (EPS) foam and
rock wool as insulation material, natural gas and coal as fuel,
sandwich and externally insulated walls as wall construction
types were chosen for said purpose. Life cost analysis and degree
hour method was used for heating cost and optimum insulation
thickness calculations, respectively. In addition, considering the
work done for the province of Ankara by the Ministry of Energy
and Natural Resources in 1998, some calculations and
evaluations were made for the fuels used for heating purposes
and their quantities. A realistic analysis was made on this side;
economic and emission reduction benefits of building exterior
wall insulation are shown in graphs, and the amount of emissions
per capita and their reductions are proportional.
Bu çalışmada, Ankara’da farklı duvar bileşenlerinin
optimum yalıtım kalınlığı, toplam maliyet, enerji tasarrufu, geri
ödeme süresi ve dış duvar konstrüksiyonunun ısıtma amaçlı
yakıt tüketimi sonucu oluşan çevre kirliliğine etkisi incelenmiştir.
Yalıtım malzemesi olarak sıkıştırılmış polistren köpük (XPS),
genleştirilmiş polistren köpük (EPS) ve taş yünü, yakıt olarak
doğal gaz ve kömür, duvar konstrüksiyonu olarak sandviç duvar
ve dıştan yalıtımlı duvar tipleri seçilmiştir. Isıtma maliyeti
hesabında ömür maliyet analiz yöntemi, optimum yalıtım
kalınlığı hesabında ise derece saat yöntemi kullanılmıştır. Bu
çalışmada, 1998 yılında Enerji ve Tabii Kaynaklar Bakanlığı
tarafından İstanbul ili için yapılan çalışmayı dikkate alarak
ısıtma amaçları ve miktarları için kullanılan yakıtlar için bazı
hesaplamalar ve değerlendirmeler yapılmıştır. Bu sayede
gerçekçi bir analiz yapılmış; bina dış duvar yalıtımının ekonomik
ve emisyon azatlımı faydaları grafiklerle gösterilmiştir.
1.st International Conference Energy Systems Engineering
ıcese'17
Onur Vahip Güler
Ali Dasdemir
Mustafa Erturk
Ali Kecebas
Circulating Fluidized Bed Boilers (CFBB) provide
the most suitable combustion system for efficient and clean
burning and gasification of low quality lignite. In this study, the
CO, CO2, H2O, SO2 and NOx emissions distribution in the
furnace were investigated by burning four different types of coal
in a ÇAN TS furnace geometry under specified boundary
conditions. A CPFD(Computational Particle Fluid
Dynamics)method was used for the numerical analyzes in this
study. A MP-PIC (Multiphase-Particle in Cell) method was used
to solve gas-solid multiphase flows in the numerical analyzes. An
EMMS-YANG 2004 drag model, a SIMPLE solution algorithm,
a Particle Donor Cell Differencing discretization method and the
LES turbulence method were also used in the numerical analyzes.
Time steps for the numerical analyzes were taken every 5
s,and the analyzes were performed over 200 seconds. The
numerical models were verified by ÇAN TS experimental results.
The NOx emission, SO2 emission, CO2 molar ratio, CO molar
ratio, H2O molar ratio and O2 molar ratio distributions in the
CFBB combustion chamber were compared for four different
lignites. For the lignites burnt under the specified boundary
conditions, the highest average CO2 molar rate at the furnace
exit was found when analyzing the burning of Çan lignite, the
highest average CO molar rate at the furnace exit was found
when burning Beypazarı lignite, the highest average NOx
emissions in the furnace exit was found when burning GLİ-
Tunçbilek lignite, the highest average SO2 emission rates at the
furnace exit were seen when burning Ilgın lignite
1.st International Conference Energy Systems Engineering
ıcese'17
Osman İPEK
Barış GÜREL
Mehmet KAN
Bu çalışmada uzun dönemli sıcaklık dağılımı Karabuk ili
için analiz edilmiştir. Dış sıcaklık dağılımına bağlı olarak ısıtma
ve soğutma derece-saat değerlerindeki trend belirlenmiştir.
Isıtma derece saat değerlerinde azalma olduğu gözlemlenmiştir.
Bunun tam tersine soğutma derece saat değerlerinde arttığı
belirlenmiştir. Konuyla ilgili detaylı analiz sonuçları ve grafikler
çalışmada sunulmuştur. Analiz sonuçları Karabuk ili için
soğutma enerji gereksiniminin artış göstereceğini ortaya
koymuştur.
Anahtar Kelimelers— Dış Sıcaklık Dağılımı, Isıtma Derece-Saat,
Soğutma Derece-Saat, Karabük
In this study, long-term temperature distribution has
been analysed for Karabük province. The trend in the heating
and cooling degree-hour valves defending on the distribution of
outside temperatures was determined. A decrease was observed
in the heating degree-hour valves. On the other hand, it was
determined that there had been an increase in the cooling degreehour valves. Detailed analysis results and graphs. Relevant to the
topic are presented in this study. The analysis results revealed
that there would be an increase in cooling energy need for
Karabuk province
1.st International Conference Energy Systems Engineering
ıcese'17
Can Coskun
Mustafa Erturk
Kenan Balcı
Zuhal Oktay
The management of municipal solid waste is a
very important issue especially in the developing countries
where there is lake of environmental awareness. To
determine the most feasible municipal solid waste
management system, a comparison between two simple
alternatives was performed for the MSW of the
Governorate of Dakahlia in Egypt. Data were collected
about the generation of solid waste in Egyptian cities from
literature and from plants in Mansoura City and Talkha
city. Eco-Indicator as a tool and methodology of Life cycle
assessment to indicate the environmental impact was
performed. The results showed that applying separation
process and recycling the 20% separated material is more
environmentally benign.
1.st International Conference Energy Systems Engineering
ıcese'17
Rami S. El-Emam
Hasan OZCAN
In molten salt reactor, where the average
concentration of solids amounts to 0.2- 0.3 t/m3, i.e. the
conditions for residence time are long enough for the thermal
combustion of biomass waste and coal and extensive gas mixing
with 70-80% excess air so enhancing biomass combustion and
heat transfers to the boilers. It is necessary to create conditions of
internal circulation without the transported coal and waste in
molten salt reactor and boiler, 90-95% combustion yield were
observed at the end of combustion. Total heat values of biowastes
were of approximately 17.8 kJ/ kg for corn stalk and 16.2 kJ/ kg
for forest wood waste for molten salt gasification.
There are various objectives to make the necessary arrangements
to increase the use of biomass and solar energy as the other
device. Considering the known biomass area of the potential high
forest fields in northern Anatolia and located in central and
eastern Anatolia it is seen as having low to medium heat
resources. As we have seen in our country there is a significant
potential for biomass resources will be invested. The low heat
waste will be great source for waste heat and in comparison the
electricity production may reach on 60-70 % thermal
performances by co gasification.
1.st International Conference Energy Systems Engineering
ıcese'17
Yıldırım İ. Tosun
Bu çalışmada dikdörtgen kesite sahip tek bir mikrokanal
içerisine, farklı yerleşim düzenlerinde konulmuş dikdörtgen
kanatçıkların akış ve ısı geçişine etkisi sayısal olarak
incelenmiştir. Ticari bir yazılım olan Ansys Fluent 17.2
kullanılarak hesaplamalı akışkanlar dinamiği (HAD) analizi
gerçekleştirilmiştir. Çalışmada iş akışkanı olarak su seçilmiş,
HAD analizleri Reynolds sayısının 300 ila 2000 olduğu aralıkta
yapılmıştır. Çalışmadan elde edilen sonuçlar, basınç düşümünün
ve Nusselt sayısının kanal içine yerleştirilen kanatçıklar ile
arttığını göstermiştir.
1.st International Conference Energy Systems Engineering
ıcese'17
Nezaket PARLAK
Halime Çelik
This paper presents a modified global maximum
power point tracking (GMPPT) algorithm which may be suitable
in module integrated converters (MICs) used in distributed
MPPT (DMPPT) system. Algorithm developed for this type of
system uses basic voltage - current (V-I) and voltage - power (VP) characteristic features of photovoltaic (PV) modules. It
employs the relationship between maximum power voltage and
open circuit voltage of a PV module and number of bypass
diodes included in a module. To verify the effectiveness of the
proposed algorithm, single ended primary inductance converter
(SEPIC) is designed. Simulative and experimental results show
that GMPPT is realized for all shading conditions with small
convergence time owing to the searching of large duty range.
1.st International Conference Energy Systems Engineering
ıcese'17
Mustafa Engin Başoğlu
Bekir Çakır
Ionanofluids are a very new class of heat transfer
fluids with multiple applications in many area and especially in
the solar area. Ionic liquids (ILs) are the organic salts having a
low melting point (below 100 °C), which are already considered
as a potential new heat transfer fluid in the solar thermal
collector and potential replacement of several organic solvents in
chemical industry for reaction and separation systems. The
increasing interests of ILs are due to their excellent physical and
chemical properties.
It has to be pointed out in this stage that Ionanofluids are mostly
developed for use in the medium-to-high-temperature heat
transfer systems, different from the nanofluids based on water
and ethylene glycol that are to be considered at lower
temperatures. Moreover, the thermophysical properties of ILs
can be enhanced by inserting and dispersing small percentages of
nanoparticles, which is called Nanoparticle Enhanced Ionic
Liquids (NEILs) or, shortly, ionanofluids. Results on
temperature and concentration dependence of thermal
conductivity and viscosity of various ionanofluids obtained from
different groups together with the data of water based nanofluids
from literature are to be presented and discussed in this paper,
outlining the benefits and drawbacks.
1.st International Conference Energy Systems Engineering
ıcese'17
M. Chereches
I.E. Dinu
A.A.Minea
Energy consumption in daily life is showing an
increasing rate of curve. Governments tries the new alternatives
to solve the energy problem to ensure the sustainability of the
development of their countries. In this respect, nuclear is seeing
an exciting alternative if they make sure their citizens about the
reliability of the nuclear plants. Today, 449 nuclear power plant
operating in the world and 60 new reactors is constructing in 15
countries. Against the misfortunate accidents, there is a
consensus about the nuclear is the safest energy. This paper
assesses the current and future status of nuclear energy.
1.st International Conference Energy Systems Engineering
ıcese'17
Selcuk Selimli
Laser sintering technology(LST), which has been
widely used recently, is a very important method to produce
precise and qualified parts which cannot be manufactured with
conventional methods. In this paper, the thermal behaviors and
heat transfer performances of brazed plate heat exchanger
(BPHE) and monoblock heat exchanger (MBHE) produced by
laser sintering method from the AISI 316 stainless steel powder
are numerically analyzed and experimentally investigated in an
experiment setup. In analyzes, the inlet temperatures and mass
flow rates of the hot and cold water are ,
and , ,
respectively . According to analysis results; outlet temperatures
of cold and hot fluids circulated in MBHE
are , respectively, while that in
BPHE are and . According to
experimental results, outlet temperatures of cold and hot fluids
in MBHE were measured as , ,
respectively. As results of numerical and experimental analysis,
heat transfer performance of the MBHE is 47.7% higher than
BPHE, while its volume is 44.39% less. By comparing the results
obtained from numerical and experimental analysis, it is
observed that the results are consistent with each other
1.st International Conference Energy Systems Engineering
ıcese'17
Mehmet KAN
Osman İPEK
Barış GÜREL
The heat transfer characteristics are significantly
affected at the points where the flow separation and the
reattachment regions are observed inside the ducts. Heat
transfer is enhanced by placing the blockages such as the fins, the
turbulators to trigger the flow separation between the parallel
plates. The fins placed between the horizontal parallel plates,
cause the rotational flows in front of the fins and the flow
separation by interrupting both thermal and hydrodynamic
development lengths. Furthermore, these fins are very effective
as an extended surface area element for the heat transfer
enhancement. However, the fins increase the required pumping
power in the meantime owing to the ascending pressure loss in
such systems. This aforementioned method is based on the
production of the secondary flows and the fluctuations due to the
fins and used for the heat exchangers, the solar collectors, the
cooling of electronic devices. In this study, the effect of the
rectangular cross-sectional fins on the flow characteristics has
been numerically investigated via two-dimensional analyses of k-
ω Shear Stress Transport (SST) turbulence model. The fins with
constant dimensions have been mounted on the internal surfaces
of the bottom and the top plates, periodically and symmetrically.
The flow characteristics have been presented by comparing at
the values of Reynolds numbers as 10000, 15000 and 20000.
1.st International Conference Energy Systems Engineering
ıcese'17
Ilker Goktepeli
Ulas Atmaca
Using the power of the sun is becoming more and
more popular to generate the heat besides needing electricity.
Solar air heating systems which are used for supplemental
heating are extremely effective and most economical way of the
building heating. In addition, solar air heating systems are
important in view of CO2 reduction strategies since these systems
decreases the greenhouse gas emissions as a result of reducing
the using of fossil-based sources. The performances of these
systems are depending on their designs and operating
parameters.
In the presented paper, three different types of solar air
heaters were designed and analyzed in the thermally by using
computational fluid dynamics (CFD). The solar radiation values
were given by the Solar Load module in the ANSYS Fluent
programme. Mesh independence was taken into account in
numerical solutions. The results of three different designs were
thermally interpreted and the yield values of the designs were
compared.
1.st International Conference Energy Systems Engineering
ıcese'17
Gamze Genç
Barış Karakaya
A. GUNES
In the present work, forced convection heat transfer
were investigated numerically for the fully developed fluid flow
of incompressible viscous laminar flow (Re=50-500) under the
constant wall heat flux in sudden expansion channels. Various
fluids were used with different concentration of nanoparticle
such as TiO2, ZnO and SiO2. These nanoparticles were dispersed
with the range of 0.5-2% volume concentrations in pure water to
form stable suspensions of nanofluids. The flow assumed to be
uniform in the channel inlet and numerical computations were
performed for the fully developed laminar flow conditions.
ANSYS Fluent15.0 code, commercially available software based
on finite volume approach was used to calculate the governing
continuity, momentum and energy equations. Obtained results
from numerical study was plotted graphically and discussed in
detail. Effect of nanoparticle volume fraction and Reynolds
number on the convective heat transfer, Nusselt number,
pressure drop and Darcy friction factor were determined.
1.st International Conference Energy Systems Engineering
ıcese'17
Engin Gedik
Cuneyt Uysal
Ozan Gülser
Hüseyin Kurt
An optimum Horizontal Axis Wind Turbine (HAWT)
geometry can be generated by comparing the power efficiency of
different Tip Speed Ratios (TSR). The properties that generate
the optimum geometry are sorted as choosing the right airfoil
varying along the blade, blade width, twist angle and the Design
Tip Speed Ratio (DTSR). The blade length and twist angle can be
determined with the DTSR. The study chooses three different
DTSR values 6, 7 and 8 for the investigation, since in literature,
some researchers advice to choose between 5-10 and some others
6-8 [14] [15]. According to the three DTSR and chosen three
standard airfoils (NACA 64-415, RISØ-A1-21, NREL S809), nine
different HAWT geometries are generated. The chord length and
twist angle of the nine geometries are calculated based on the
Schmitz theory. For the theoretical calculation of the rotor
power efficiency, an algorithm is programmed in MATLAB®,
based on the Blade Element Momentum (BEM) theory. Also, the
nine HAWT dimensions are integrated to a Computer Aided
Design (CAD) code for the numerical calculation of the power
efficiency by ANSYS® Fluent Computational Fluid Dynamics
(CFD) computer package simulation program based on the
Finite Element Method (FEM). The results found in both BEM
and CFD are interpreted. How to determine the right geometry
dimensions that generate the highest power efficiency is
presented
1.st International Conference Energy Systems Engineering
ıcese'17
Mehmet Bakirci
Sezayi Yilmaz
Nowadays, the ratio of the wind energy is increasing
over time in terms of energy requirement. Therefore, a lot of
studies have been conducted to improve the performance of wind
turbines with different designs for wind turbines. Analyzes of the
blade designs are investigated by using numerical programs. In
this study, the length of support rods in a vertical axis wind
turbine was changed and investigated numerically how the
length of the support rods affected the moment coefficient. The
blade profile used in the vertical axis wind turbine is NACA 4412
and the number of blades is 3. 120 rpm angular velocity is
defined for the turbine and input velocity is 7 m/s in x-direction.
According to the results, it was seen that the moment coefficient
was the highest when the length of the support rods was 0.4 m.
Moreover, there was no linear relationship with between the
length of the support point and the aerodynamic performance of
the turbine.
1.st International Conference Energy Systems Engineering
ıcese'17
M.S. Genç
H. Demir
Özkan Ramazan
H.Hacı Açıkel
Burak Karakaya
One of the important parameters that affect the
performance of a fixed solar system is its tilt angle with the
horizontal. The variation of tilt angle changes the amount of
solar radiation falling the fixed solar system surface. In this
study, the optimum tilt angle for a fixed solar system and the
total solar radiation on a tilted surface in Uşak of Turkey is
determined. Total solar radiation on the fixed solar system
surface with an optimum tilt angle is computed for specific
periods (monthly, seasonal, and yearly). The loss in the amount
of collected energy when using the yearly average fixed angle is
compared with the monthly and seasonal optimum tilt angles.
1.st International Conference Energy Systems Engineering
ıcese'17
Abdullah Yıldız
Bu çalışmada, ORÇ prensibine göre çalışan bir sistemin
tasarımı ve imalatı yapılarak güç üretimi elde edilmeye
çalışılmıştır. Sistemde R134a, R134a-propan karışımı, R22, R22-
propan karışımı, R22 ve mix (bütan, isobütan, propylene,)
akışkanlarını kullanarak deneysel çalışma yapılmış sistemin
performansı ve verim analizleri elde edilmiştir. R22-mix karışım
akışkanının verimi kullanılan diğer akışkanlardan daha yüksek
olduğu tespit edilmiştir. R22-propan karışım akışkanı ile yapılan
deneyde daha yüksek net iş elde edilmiştir.
In this study, a system working according to the ORC
principle was designed and manufactured to obtain power
production. Performance and efficiency analyzes of the system
have been carried out using the R134a, R134a-propane mixture,
R22, R22-propane mixture, R22 and mix (butane, isobutane,
propylene) fluids in the system. The efficiency of R22-mix fluid
was be higher than the other fluids. Also higher net work was
obtained with R22-propane mixtures.
1.st International Conference Energy Systems Engineering
ıcese'17
Alper ERGÜN
Mehmet KALE
Absorption cooling systems are more environment
friendly, capable of utilizing low grade heat. By consuming very
small electric power, the half-effect absorption chillers can be
driven by low temperature solar energy.
The half-effect absorption cooling system contains five
temperature levels and three pressure levels. For a given set of
generators, evaporator, condenser and absorbers temperatures,
the intermediate pressure (Pi) must be optimized to get a
maximum coefficient of performance ‘COP’ and exergy
efficiency of the system. The energy and exergy analysis is
carried out for each component of the half-effect absorption
cooling system. All exergy flows within the system are calculated.
The flow rate ratio, the coefficient of performance and the exergy
efficiency of the system are estimated. The effect of generator
temperature, absorber temperature and condenser temperature
are analyzed for a commonly used chilled water temperature
(12°C/7°C).
New analytical expression of the intermediate pressure is
developed. The derived correlation can help the researchers to
predict the values of the intermediate pressure of the half-effect
absorption cooling system before carrying out their experiments
1.st International Conference Energy Systems Engineering
ıcese'17
Rabah Gomri
Khellaf Nabil
Investment in renewable energy sources, an
alternative to reducing the use of fossil resources, is rapidly
increasing worldwide. Wind energy is one of the most used and
popular sources of green energy. Wind speed for investment in a
profitable wind power plant; area selection, system performance
and planning are important. Several methods such as statistical,
artificial neural network and fuzzy logic are used for predicting
wind speed.
In this study, wind speed estimation in MATLAB and
NeuroSolutions programs was made by artificial neural network
(ANN) method using 10-minute intervals wind data from
Ondokuz Mayıs University location and the results were
compared. The purposed wind speed prediction system uses 3
climate data which are temperature, humidity and pressure of
the place as input data. The output is hourly wind speed
prediction. The results of both programs are compared each
other via RMSE and MSE
1.st International Conference Energy Systems Engineering
ıcese'17
Kübra Nur Akpınar
Global warming means the increase of seasonal
average temperature of the earth surface and the atmosphere.
The main reason of this case is determined as the manipulation
of the atmosphere. There are lots of parameter promotes the
global warming. Global growth of the industry and the
population could be assessed as the reason of the polynomial
increase in air pollutants and so manipulation of the atmosphere.
In this paper, global warming evaluated due to the main
disruptors and current prevention efforts against them.
1.st International Conference Energy Systems Engineering
ıcese'17
Selcuk Selimli
The DC voltage obtained by using MPPT from solar
panels in PV systems varies continuously depending on the
radiation and temperature. However, in different applications
using these systems, a constant voltage is desired to supply the
load. In this study, LLC resonant converter is used to convert
DC voltage obtained from the output of MPPT to the constant
output voltage value. The reason for preference of the converter
is that in a wide input voltage range and at high switching
frequencies, the switches on the primary and secondary side can
operate in the ZVS and ZCS conditions respectively. Thus, the
switching losses, which are the result of the conventional PWM
technique at high switching frequencies, are reduced and the
power density is increased. The voltage values varying between
40 and 60 V are applied to the input of the converter simulated in
PSIM and the output is fixed at 25 V. The control of the
converter is performed by changing the switching frequency in
the range of 90-106 kHz with PI controller constituted by using
simplified c block.
1.st International Conference Energy Systems Engineering
ıcese'17
Salih Nacar
Selim ÖNCÜ
According to the Hydraulic Institute data, about
20% of the electricity generated in the world is used by pump
systems. This figure is a very impressive proof that fluid
transport is important and must be done consciously.
Considering the lifetime cost of a pump, it can be seen that the
operating costs can be up to 20 times higher than the
procurement costs. With a good system design and
appropriate pump selection, it is possible to save up to 30% of
the energy consumed by the pumps. In this study; energy
saving potentials that can be applied in pumping systems have
been examined and some suggestions have been put forward
for pumping systems in Turkey.
1.st International Conference Energy Systems Engineering
ıcese'17
Ergün KORKMAZ
In this work, the combination of solar thermal
systems with heat pumps has been numerically analyzed via
POLYSUN simulation program. Heating systems are compared
according to heat pump only reference solution. Potential benefit
of combining heating system with solar collector are investigated
for different collector areas as 4 m2, 8 m2, 12 m2, 16 m2, 20 m2
and 40 m2. The relative increases of seasonal performance factors
(SPF) and fractional electricity savings are found for six various
collector areas. Hot water demand of houses is assumed to be the
same in seven cities. Cities are Ankara, Edirne, Erzurum, İzmir,
Muğla, Mardin and Rize which are chosen from Central
Anatolia, Marmara, Eastern Anatolia, Aegean, Southeastern
Anatolia and Black Sea Regions. Another parameter is taken into
account in simulations is the energy level of the houses. Houses
have been tested for three different energy level such as normal,
low and passive energy building. Results presented in this work
show that the relative increases of SPF and fractional electricity
savings for seven cities, three energy level building and six
various collector areas.
1.st International Conference Energy Systems Engineering
ıcese'17
Tolga Ural
Gülşah Karaca
In auger pressurized reactor, where the average
concentration of solids amounts to 0.2- 0.3 t/m3.and the
conditions for residence time were sufficient and long enough for
the thermal combustion of biomass waste and coal with extensive
gas mixing with 60-65% excess air. Even the enhanced biomass
combustion and heat transfers were managed into the pyrolysis
and gasification. It was necessary to create conditions of internal
circulation without the transported coal and waste in pressurized
reactor, over 95% combustion yield were observed at the
gasification. Total heat values of biowastes were of
approximately 17.8 kJ/ kg for corn stalk and 16.2 kJ/ kg for
forest wood waste in auger gasification.
There are various objectives to make the necessary arrangements
to increase the use of biomass and solar energy as the other
device. Considering the known biomass area of the potential high
forest fields in northern Anatolia and located in central and
eastern Anatolia it is seen as having low to medium heat
resources. As we have seen in our country there is a significant
potential for biomass resources will be invested. The low
pressure caused great source for high mass transfer and
conduction heat in comparison with the atmospheric gas
production. Auger with pressurrized chamber provided thermal
performances of 80-90 % by co gasification.
1.st International Conference Energy Systems Engineering
ıcese'17
Yıldırım İ. Tosun
Turkey's electricity demand increases continuously
due to the population growth and industrial development. For
this reason, diversification of energy sources becomes an
important requirement for Turkey, in order to provide security
of energy supply and reliable and continuous energy. In this
context, many changes have been made in electricity market and
usage of renewable energy sources in electricity generation has
been encouraged with many incentives in Turkey. It can be said
that there is almost no barrier for investors in photovoltaic (PV)
electricity. In this study, the latest status of PV electricity of
Turkey and recent developments in renewable energy incentives
are evaluated. Besides that, energy performance of a three phase
grid-connected PV power system is evaluated by some commonly
known indicators such as performance ratio, specific energy and
yearly solar electricity etc. for technical feasibility of PV system.
Besides that performance comparison of three different solar
modules are made under İzmit, Kocaeli weather conditions.
1.st International Conference Energy Systems Engineering
ıcese'17
Mustafa Engin Başoğlu
Bekir Çakır
Rüzgar türbinlerinde ve aerodinamik kuvvetlerle çalışan
alanlarda kullanılmak üzere standart kanat kesitleri geliştirilmiş
olup çeşitli alanlar ve amaçlar için istenilen özelliğe sahip yeni
kanat kesitlerine olan ihtiyaç devam etmektedir.
Rüzgar türbinlerinden, belirli rüzgar hızlarında sahip oldukları
kaldırma kuvvetine göre elde edilen güç bellidir. Sahip
olduğumuz kanat profili yapısında belirli değişiklikler yapılarak
aynı rüzgar hızlarında hatta daha düşük rüzgar hızlarında daha
fazla güç elde edilmesi mümkündür. Böylece rüzgar
türbinlerinin daha verimli olabilmesi için mevcut taşıma
kuvvetinden daha fazla taşıma kuvveti elde edilmesi ve mevcut
sürükleme kuvvetinden ise daha az sürükleme kuvveti elde
edilmesi gerekir.
Kord uzunluğu 1m olan ve kök - uç arası mesafenin 5m olduğu
kanat modelinin 3 boyutlu tasarımı yapılmıştır. Tasarımı yapılan
kanat üst yüzeyini kord uzunluğu boyunca kanat boyuna 90
derece, 30 derece, 45 derece ve 60 derecelik açılar ile yerleştirilen
türbülatörlerin etkisi hesaplamalı akışkanlar dinamiği
programları kullanılarak analiz edilmesi sağlanmıştır.
Aerodinamik analiz yapılırken sadece tamamen türbülanslı
akışlar için geçerli olan k-epsilon modeli kullanılmıştır. ANSYS /
Fluent programında 15m/s hızdaki basınç ve hız dağılımları
incelenmiştir.
Work with wind turbines and aerodynamic force
field developed the standard wing sections for use in a variety of
fields and is not intended to have the desired functionality as
their needs new wing section.
The power obtained from the wind turbines according to the
lifting force they have at certain wind speeds is certain. We have
made certain changes in the structure of the wing profile is the
same wind speeds even lower wind speeds, it is possible to get
more power. Thus, in order to have more efficient wind turbines
more than the existing transport force moving power from the
drag force available and is less drag force must be obtained.
Cord length 1 m distance between the and root-end 3D design of
the model of the wing is made of 5 m. The upper surface of the
wings made the design of the cord along the length of the wing
longitudinal 90 degrees, 30 degrees, 45 degrees and 60 degree angles placed with swirl-effect analysis using computational fluid
dynamics programs. Aerodynamic analysis is valid for only fully
turbulent flows when k-epsilon model. ANSYS/Fluent program
of 15 m/s velocity distributions of the pressure and speed.
1.st International Conference Energy Systems Engineering
ıcese'17
Ufuk Ali AYGEN
Ünal UYSAL
Bu çalışmada; eş merkezli silindirik metoda göre fuzel
yağının ısı iletim katsayısını belirlemek için deneyler yapılmıştır.
Cihazın doğruluğunu test etmek için ilk olarak cihaz ısıtıcı gücü
28 W, 45 W, 64 W, 88 W ve 115 W değerlerinde ısı iletim
katsayısı bilinen saf su ile deneyler yapılmıştır. Deney setinde
soğutma suyu debisi 20 g/s, 25 g/s ve 30 g/s debilerde saf suyun ısı
iletim katsayısına etkisi gözlemlenmiştir. Yapılan deneylerin
sonucunda, soğutma suyu debisinin 30 g/s’den küçük olması
durumunda ısı iletim katsayısının gerçek değerinden daha düşük
çıktığı gözlemlenmiştir. Tasarımı ve imalatı yapılan deney setinin
doğruluğu 30 g/s soğutucu debisinde elde edilmiştir. Daha sonra
Fuzel yağı ile soğutucu akışkan debisi 30 g/s’de ve deney setinin
ısıtıcı gücü saf su ile yapılan deneylerde olduğu gibi 28 W – 115
W arasındaki güç değerleri ile deneyler tekrarlanmıştır. Deney
sonuçlarına göre ısı iletim katsayıları hesaplanmıştır. Saf su ve
Fuzel yağının ısı iletim katsayıları karşılaştırılmış ve Fuzel
yağının ısı iletim katsayısının, literatürdeki saf su ısı iletim
katsayısına göre 24 – 29 % daha yüksek olduğu gözlemlenmiştir.
1.st International Conference Energy Systems Engineering
ıcese'17
H. İbrahim VARİYENLİ
Mustafa Bahadır Özdemir1
Hydrogen production plays a very important role in
the development of hydrogen economy. Hydrogen gas production
through solar energy which is abundant, clean and renewable is
one of the promising hydrogen production approaches. This
study overviews the available technologies for hydrogen
production by using solar energy as main source. Photochemical,
electrochemical and thermochemical processes for producing
hydrogen with solar energy are analyzed from thermodynamic,
environmental, and economic points of view. It is concluded that
developments of improved processes for hydrogen production via
solar resource are likely to continue in order to reach competitive
hydrogen production costs. Hybrid thermochemical processes
where hydrocarbons are exclusively used as chemical reactants
for the production of syngas and the concentrated solar radiation
is used as a heat source represent one of the most promising
alternatives: they combine conventional and renewable energy
representing a proper transition towards a solar hydrogen
economy
1.st International Conference Energy Systems Engineering
ıcese'17
Canan Acar
Due to the rapidly growing human population in the
world, the use of many underground diesel engines such as
transportation, energy production, heavy industrial machinery
also showed a rapid increase. Due to the widespread use of diesel
engines, increasing performance and reducing harmful emissions
while lowering fuel consumption are at the forefront of research
into these engines. Due to the increase in environmental
awareness around the world, both fossil fuels and fuel systems
are being investigated for diesel engines. The main fuel used in
diesel engines is diesel fuel. Diesel fuel from the secondary energy
source class is also called motor. In diesel engines, many liquid or
gaseous fuels are used as alternative fuels. They are alternative
gas fuels used in hydrogen, natural gas, LPG, DME and biogas
diesel engines. The fuels that are currently the easiest to find and
access in this class of fuel are LPG and natural gas. In this study,
the effect of diesel / LPG dual fuel on engine performance and
emissions was investigated experimentally. The tests were carried
out at constant engine speed and five different engine loads.
Experimental results show that there has been some increase in
NOx emissions from reductions in CO and HC emissions to diesel
fuel. It was observed that there has been improvement in specific
fuel consumption, specific energy cost and effective
efficiency.This document presents the formatting instructions for
the Proceedings of the International Conference of Advanced
Materials and Manufacturing Technologies (ICESE). This
document can serve as the base template for a Microsoft Word
based typesetting system.
1.st International Conference Energy Systems Engineering
ıcese'17
Ahmet Irgin
Mustafa Aydin
M.B. Çelik
Bu çalışmada, hibrit mühendislik bölümlerinden biri olan,
Türkiye'deki üniversiteler bünyesinde 2006 yılından itibaren
açılmaya başlanan, Enerji Sistemleri Mühendisliği
Bölümü(ESMB) ve 2010 yılında eğitim kurumlarımız arasında
yerini alan Teknoloji Fakültelerinin(TF) tarihsel gelişim süreci
ve eğitim programlarından bahsedilmiştir. Bu fakülteler için özel
kontenjan ayrılan Mesleki ve Teknik Orta Öğretim Kurumları
(MTOK) öğrencileri ve bu öğrencilerin eğitim süreçleri ele
alınmış, TF ve özelde ESMB öğrencilerinin genel problemleri ve
çözüm önerileri değerlendirilmiştir.
1.st International Conference Energy Systems Engineering
ıcese'17
Bayram Köse
Ahmet Zahid Küçük
Muhammed Kerim
Bu çalışmanın amacı, yaz aylarında sıcaklıkların
yükselmesinden kaynaklı olarak insanların gün içinde kliması
olan ortamlardan çıktıktan sonra yani dış ortamda, spor
yaparken, çalışırken veya seyahat ederken vb. vücut ısısının
artmasıyla hissedilen sıcaklığı azaltmak ve serinlik hissini
portatif bir şekilde yanlarında taşıyabilmelerini sağlamaktır. Bu
amaç ile kolay taşınabilir iklimlendirme sistem tasarımı
gerçekleştirilmiş, bilgisayar destekli akış analizi yapılarak deney
düzeneği kurulmuştur. Yapılan deneysel sonuçlar ile CFD
sonuçları karşılaştırılmış ve sonuçların birbirleri ile uyumlu
olduğu görülmüştür. Termoelektrik modül kullanılarak üretilen
küçük ölçekli taşınabilir iklimlendirme deney setinde çevre hava
ile insan tenine gönderilen hava arasında yaklaşık 7 oC’lik bir
sıcaklık farkı elde edilmiştir. Bu sıcaklık farkı insan konfor
şartlarını olumsuz etkilemeyecek mertebede olduğu için kabul
edilebilir bulunmuştur.
The purpose of this study is to reduce the temperature
felt due to increased body temperature when people are doing
sports outside, working or traveling during the summer, and to
carry the coolness sensation with them in a portable manner. For
this purpose, an easy portable climate system design has been
realized, a computer aided flow analysis has been carried out and
an experimental setup has been established. The experimental
results and the CFD results were compared and the results were
found to be compatible with each other. In the small-scale
portable air-conditioning experiment set produced using the
thermoelectric module, a temperature difference of about 7 °C
was obtained between ambient air and air sent to human skin.
1.st International Conference Energy Systems Engineering
ıcese'17
G. Gurlek
K.S. Onat
In this study, thermoelectric cooling system was
designed to use in small scale greenhouse environment. Saffron
onions were placed in small scale greenhouse with 52x42x28 cm
dimensions that was filled with soil. The control of heatingcooling system was achived using PIC system which had 6 pieces
12V – 1 A thermoelectricy Peltiers located the bottom surface of
the greenhouse. In designed system, temperature of the contacted
surface between Peltiers and soil was kept as constant between
13,5°C and 14°C through 47 days. Later, the temperature of this
surface was increased to 19 °C by means of rectifying the peltiers
current directions. As a result, the saffron onions were bloowing
by this approach that was consist of cooling during 47 days and
heating during 30 days. Besides, the second bloowing process was
achived within 77 days
Yapılan çalışmada, termoelektrikli ısıtma soğutma
sisteminin mini sera ortamında kullanılabilmesi için tasarım
yapılmıştır. Bu tasarımda 52x42x28 cm ebatlarında toprakla
doldurulmuş mini bir sera içerisine yerleştirilen safran bitkisi
soğanlarının, seranın alt yüzeyine yerleştirilen toplam 6 adet 12V,
1A termoelektrik peltierler tarafından pic sistemi ile ısıtma ve
soğutma kontrolü gerçekleştirilmiştir. Bu sistemde peltierlerin
toprakla temas eden yüzeylerinin 47 gün süresince 13,5°C ile
14°C arasında tutularak toprağın soğuk kalması sağlanmış daha
sonra peltierlerin akım yönü ters çevrilerek toprakla temas eden
bu yüzeylerin 19°C çıkarılıp toprağın ısınması
gerçekleştirilmiştir. Yapılan bu deney neticede yılda bir kez açan
ve altın değerinde olan safran çiçeği soğanlarının şaşırtılarak, 47
gün soğutulup sonra 30 gün ısıtılması ile çiçek açması sağlanmış
ve toplam 77 günde ikinci çiçeklerini vermesi gerçekleştirilmiştir.
1.st International Conference Energy Systems Engineering
ıcese'17
Bahadır ACAR
This study aims to investigate the suitability and
Abstract— Demand for clean, renewable and safe energy
technologies is increasing gradually with increasing energy needs
in the world. One of these technologies, fuel cells, attract a great
attention due to their high power density and scalability,
furthermore they only release water vapour as product.
Generating high power density at high temperatures (100°C-
180°C) with phosphoric acid doping, polybenzimidazole (PBI)
membrane based proton exchange membrane (PEM) fuel cells
have been used for stationary and portable systems. In this study,
membrane electrode assemblies (MEA) were fabricated by
doping the PBI membrane with different acid doping levels (
4.53, 4.95, 5.51 H3PO4 / RPU PBI) in the laboratory environment.
Each MEA was connected to test cell and run for 24 hours at a
temperature ranging from 120°C to 160°C with steps of 10°C
and 5% to 20% relative humidity levels with steps of 5%. The
effect of phosphoric acid doping, compression pressure,
operating temperature and time on deformations in the structure
of MEAs by were analysed by Scanning Electron Microscopy
(SEM). It was observed that MEA structure was less brittle as
phosphoric acid doping increases
1.st International Conference Energy Systems Engineering
ıcese'17
Mert TAŞ
Murat ÇELİK
Gülşah ELDEN
In this study, the effect of the Reynolds numbers for
different sinusoidal decoupled strip elements placed separately
from the pipe in turbulent flow on heat transfer was investigated
experimentally. Experiments were carried out under forced
convection and constant heat flux conditions. Corrugated strip
elements were positioned axially to the pipe center, which draws
a sinusoid used as a turbulator. Experiments were repeated for
three different amplitudes of sinusoidal strip elements with D/2
width, 3D/16 , D/4, D/8. Experiments showed that although the
strip elements enhanced heat transfer at different rates. As a
result, it was seen that heat transfer ratio i.e. Nusselt number
increased as the amplitude value increased. While this rate is
55% in D/8 amplitude, it was about 75% in 3D/16 and 105% in
D/4.
1.st International Conference Energy Systems Engineering
ıcese'17
A.Hakan Altun
M.Gurdal
A.Berber
In this study the effect of nanofluids on collector
performance was numerically investigated when using as
working fluids in solar collectors which are commonly used in
solar energy applications. Nanofluids are produced by adding
nanoparticles to a base fluid as known. Thermophysical
properties of base fluids change. The most important property of
nanofluids is thermal conductivity enhancement. In this study
ethylene glycol – water mixture was used as a base fluid which is
especially used as cold climates for reducing freezing point. The
reasons for this are expanding the range of working temperature
and preventing the flow from higher density and viscosity of
ethylene glycol at the same time. TiO2/EG-Pure Water
nanofluids were used as working fluids in an evacuated U-tube
solar collector at 1.0 – 4.0% volumetric concentrations with 30-
70% EG-PW base fluid for determining the effect of nanofluids
on collector thermal efficiency. An evacuated tube solar collector
with copper U-tube was modeled in FLUENT 17.0 and thermal
efficiency of it was calculated by solving of flow field of the
collector. 18.1% enhancement was obtained as maximum in
thermal efficiency when using nanofluid as a working fluid. It
was determined that the flow rate of the fluid was a significant
parameter on thermal efficiency of the solar collector. The
highest collector efficiency was obtained at 4.0% nanoparticle
volume concentration and ṁ=0.045 kg/s.
1.st International Conference Energy Systems Engineering
ıcese'17
Hüseyin Kaya
Kamil ARSLAN
Corresponding author E-mail: hasanozcan@karabuk.edu.tr
Abstract— This study aims to investigate the suitability and
fidelity of three optimization metaheuristics applied to a simple
thermal system costing problem and to discuss their generic
comparison by taking into account the cost assessment of an air-
cooling unit. Undertaken thermodynamic plant consists of an air
chiller plant, which requires additional heat reservoir to keep the
air temperature at a desired level. The temperature level of this
reservoir is kept constant by using a cooling tower. A pre-cooler
is also introduced as a black-box mathematical model for
enhanced chiller performance. Three stochastic population-based
metaheuristics, namely particle swarm optimization (PSO),
differential evolution (DE) and backtracking search algorithm
(BSA), are applied for many case studies throughout the studied
system and the results are validated with Lagrange multipliers
method (LM) as the only direct search algorithm. Optimization
results suggest that a successful optimum cost is easily achievable
by using each algorithm with a trade-off. While BSA provides a
useful amount of minimum costs for all considered cases by
reporting the best system parameters selection, PSO and DE
algorithms perform faster to reach the optimal value at the
specified
solution
space
with
a
requirement
of
suitable
.
initialization
1.st International Conference Energy Systems Engineering
ıcese'17
Hasan OZCAN
Leandro dos Santos COELHO
Mehmet Özdemir
Bu çalışmada, TiO2 nanoakışkanı kullanarak paralel akışlı
iç içe borulu eş merkezli ısı değiştiricide ısıl iletkenliğin
arttırılması amaçlanmıştır. Deney düzeneğinde saf suyun
içerisine %2 (kütle/ kütle) derişimi sağlanacak şekilde süspanse
edilen ortalama 44 nm boyutunda %97 saflıkta TiO2
nanopartikülü kullanılmıştır. Isı değiştiricide sıcak akışkan
olarak TiO2-saf su nanoakışkanı, soğuk akışkan olarak ise saf su
kullanılmıştır. Isı değiştirici paralel Sonuçlar saf su-saf su
akışkanları kullanılarak hesaplanan değerlere göre
karşılaştırılmıştır. Nanoakışkan kullanımı sonucu paralel akışlı
ısı değiştiricisinde sıcak akışkanın sahip olduğu ısı transfer
katsayısında %38, soğuk akışkanın sahip olduğu ısı transfer
katsayısında ise %3 iyileşme sağlanmıştır. Sistemin toplam ısı
transfer katsayısı %17 artmıştır.
In this study, increasing thermal performance was
objected with using TiO2 nanofluids in the parallel-flow
concentric, nested tube heat exchangers. At the experimental
setup 44 nm size and 97% purity TiO2 nanofluids was using
which is suspending at 2%(mass/mass) concentration. TiO2-pure
water nanofluids used as the hot fluid and pure water used as
cold fluid at the heat exchanger. Results were compared with
other experiment which is making by using pure water-pure
water fluids. At the parallel flow condition the heat transfer
coefficient of hot nanofluid was 38% greater than pure water
and heat transfer coefficient of cold fluid was 3% greater than
pure water. And also total heat transfer coefficient of system was
17% greater than pure water.
1.st International Conference Energy Systems Engineering
ıcese'17
Emre EROL
Tayfun MENLİK
Adnan Sözen
Bu çalışmada, yüksek oranlarda kül içeren ülkemiz
linyitlerinin sabit yataklardan daha hızlı bir şekilde yakılması amacı
ile, 40 kW lık döner yanma odalı bir yakma sistemi tasarlanmış ve
prototip üretimi yapılmıştır. Sistemde, kömür bir sonsuz vida
tarafından bunkerden sabit devirde kendi ekseni etrafında sürekli
olarak döndürülen silindirik yanma odasının arkasına sürekli olarak
taşınmaktadır. Hava eski sistemlerden farklı olarak, kömür yatağına
başlık ekseninden radyal doğrultuda sağlanmıştır.
Sistemin performansının ortaya konulması amacıyla Tunçbilek
linyitinin yakılmasında, baca gazı bileşimine linyit ve hava besleme
hızlarının ve ayrıca yanma verimine yanma odası eğimi ve dönme
hızının da etkisi araştırılmıştır.
Deneysel sonuçlar, Tunçbilek linyitinin böyle bir sistemde oldukça
hızlı, verimli, pratik ve düşük atmosferik kirletici emisyon düzeyleri
ile yakılabileceğini göstermiştir.
In this work, a 40 kW coal combustion system with
a rotary chamber, to burn our country’s lignites, which usually
contain high level of ash, faster than fixed beds was designed and a
prototype model was constructed. In the system, coal has been
continuously carried by a screw conveyor from an hopper to the
cylindrical burner head rotating continuously at a constant speed. As
a difference among the previous systems, combustion air was
supplied, by an axially-centred air tube carrying screw conveyor, into
the air head in radial directions to the coal bed.
In order to evaluate the performance of the system, the effects
of feed rates of lignite and combustion air, angle of tilt and rotation
speed of the burner head on the flue gas compositions and
combustion efficiency were investigated.
The results of the experiments showed that Tunçbilek lignite
could be burned with this kind of system in fast, efficient and
practical and acceptable atmospheric pollutants levels.
1.st International Conference Energy Systems Engineering
ıcese'17
Cengiz ÖNER
Burak TANYERİ
ibrahim can
Cumali İLKILIÇ
The energy demand is responsible about 80% of air
pollution in Turkey. This ratio is very close to the many
countries. And according to the authorities, the increasing will
not stop since the economical development is lasting on.
The economy is always showing parallel behavior with energy
consumption. Energy is needed for heating, processing,
producing, transporting, constructing and many operations.
Therefore, the energy effects on climate change are unavoidable.
In the country base consideration of climate change problem,
energy is the main GHGs sources that affect the atmosphere and
environment.
Turkey has started to work on Climate Change problems after
the ratification of United Nations Framework Convention on
Climate Change (UNFCCC) in 2004 and the ratification of Kyoto
Protocol (KP) in 2009. The effect of climate change in Turkey is
an important subject since being Annex I country to the protocol.
Although Turkey has not any obligation for the protocol, it has to
deal with emission sources and try to decrease their emission
levels not only for international purposes but also for national
purposes.
In this study, the main aim is to consider the GHGs emission
trend of Turkey’s and determine its behaviour towards to the
Climate Change Problem. The atmospheric GHGs emission is
increasing in Turkey. In 2020, the CO2 emission will reach 545
million tonnes. The CH4 and N2O values will be approximately
6.5 and 7.8 million tonnes CO2 equivalent values. Therefore, the
future emission will increase approximately 417% compared to
the 1990’s level.
1.st International Conference Energy Systems Engineering
ıcese'17
Ali Can
Sustainability of the energy is the main subject of the
Turkey similarly as other industrialized countries. Fossil fuels is
the main source of the energy demand and it is known that world
may suffer from the scarcity of fossil fuels in this century. In the
worldwide, researchers in a hurry to speed up their studies on
alternative energy. Wind energy is the one of the attractive
alternative and currently Turkey is doing investments
intensively. This paper discusses about the interest on the
investment and wind energy potential of the Turkey.
1.st International Conference Energy Systems Engineering
ıcese'17
Selcuk Selimli
In this study, the studies that have been realized to
increase the electricity energy efficiency in the production of
Medium-Density Fiberboard (MDF) is presented and also, the
effect of the technologies used in medium-density fiberboard
production on the energy efficiency have been examined by
comparing the data obtained from different companies in
Turkey. The main energy sources used in fiberboard
production are electricity, biomass and natural gas. The use of
wood (biomass), which is used as a raw material in the
production of fiberboard, as an energy input in production
processes, makes an important contribution to increase
energy efficiency.
When comparing electricity energy efficiency studies in some
MDF plants in Turkey, the energy-saving potential headings
are; refinery capacity, fans, pumps, compressors, absorption
chiller, edge cutting/surface sanding tolerances and lighting.
In addition, the changes in electricity specific energy
consumption of companies that have started their energy
management studies have been evaluated. As a result of the
studies; it has been seen that there is a saving potential as
18.75% in fan applications, 7.12% in pump applications and
3.26% in compressor applications compared to the total
consumption of these applications
1.st International Conference Energy Systems Engineering
ıcese'17
Hilal Bilgin
Muharrem EYİDOĞAN
Fatma Çanka Kılıç
Durmuş KAYA
Tuzlu sudan içme suyu elde edilmesinde kullanılan termal
yöntem sıkça uygulanan bir yöntemdir. Literatürde bu alanda
güneş enerjisindan faydalanılan sistemler üzerinde yapılan
çalışmalar olmakla birlikte ısı pompası destekli sistemler
üzerinde çok fazla çalışma bulunmamaktadır. Bu çalışmada
tuzlu sudan güneş destekli ısı pompası ile içme suyu elde edilmesi
yöntemi analatik olarak incelenmiştir. Isı pompasında R134a,
R22 ve R12 gazları kullanılmış ve sistem performansına olan
etkileri araştırılmıştır. Tuzlu suyun kaynama noktasına
getirilmesi ve buharlaştırılmasında güneş enerjisi ve ısı pompası
birlikte kullanılmıştır. Tuzlu suyun kaynama sıcaklığını ısı
pompasının kondenser sıcaklığının altına indirmek için basıncı
10 kPa’a düşürülmüştür. Sistemde ısı pompasının kondenseri ve
evaporatörü ısı değiştirici görevi görmektedir. 20 °C olarak ısı
pompasının kondenserine gelen tuzlu su, burada kaynama
noktasına çıkarılarak su-buhar karışımı elde edilmiştir.
Kondenserden çıkan tuzlu suya güneş enerjisi ile ısı enerjisi
verilerek tuzlu suyun buharlaştırılması sağlanmıştır.
Buharlaşarak tuzdan arındırılan içilebilir su buharı, ardından ısı
pompasının evaporatörüne giderek burada kısmen
yoğuşturulmuştur. Ardından ikinci bir kondensere girerek sıvı
faza dönüştürülmüş ve bir pompa vasıtasıyla tekrar atmosfer
basıncına çıkarılmıştır. Yapılan hesaplamalarda sistemde en
verimli çalışan akışkanın sırasıyla R22, R12 ve R134a olduğu
görülmüştür. Kompresör işinin arttırılmasıyla güneşten alınması
gereken enerji miktarının azalması sağlanmıştır. Böylelikle 0,1
kg/s içilebilir su elde etmek için harcanması gereken minimum
enerji miktarı 59,68 kW olarak bulunmuştur. Termal yöntemde
ısı pompasının kullanılmamış olması durumunda ise aynı
miktardaki içilebilir su eldesi için 249,9 kW enerji harcanması
gerektiği görülmüştür. Yapılan bu çalışma ile tuzlu sudan
içilebilir su elde edilirken, termal yöntemde güneş destekli ısı
pompasının kullanılması, harcanması gereken enerji miktarını
azalttığı sonucuna varılmıştır.
fluids were used in the heat pump. Solar energy and heat pump
are used together to bring salt water to the boiling point. The
pressure was reduced to 10 kPa to lower the boiling temperature
of the salt water below the condenser temperature of the heat
pump. The condenser of the heat pump and the evaporator work
as a heat exchangers. Salt water enters to the condenser of the
heat pump, where its temperature reaches to the boiling point.
Then, solar energy is added to salty water for completely
evaporation of water from salt. Water vapor enters firstly
condenser of heat pump and the second condenser of the system
respectively for condensation. Calculations show that, the most
efficient fluid for the system is R22. When the compressor work
is increased, the need of the solar energy for the system is
reduced. Thus, the minimum amount of the energy to be
consumed to obtain 0.1 kg/s of drinking water was found to be
59,68 kW. If the heat pump is not used in this system, 249,9 kW
of energy is to be consumed for the same amount of drinking
water.
Desalination of water, heat pump, solar energy,
renewable energy.
1.st International Conference Energy Systems Engineering
ıcese'17
Ahmet Ümit TEPE
Yaşar YETİŞKEN
Ekrem GÜLSEVİNÇLER
Fuel injection system is one of the most important
equipment which affect the engine performance in internal
combustion engine. In available systems fuel is sended
pressurized to combustion chamber, behind intake valve or
intake manifold throat and fuel-air mixed is created. The most
important advantages of injection systems are increase the
combustion efficiency by atomizing the fuel. The atomization of
the fuel is provided by high pressure.
In this study, the effects of using ultrasonic atomization method
as a new atomization method in internal combustion engines
were investigated on the vehicle performance under road
conditions. Therefore, an ultrasonic fuel injection system was
designed and a four-stroke, four-cylinder, spark ignition
carbureted motor was installed. The road simulation was
determined on the vehicle chassis dynamometer and the fuel
consumption and exhaust emission values were obtained by
operating the vehicle for a certain period in urban conditions for
a certain period under intercity conditions. Existing conditions
have been repeated in the performance of the engine with the
original fuel system. The results are converted into graphics and
interpreted.
As a result, it has been observed that there is a significant
reduction in fuel consumption and exhaust emission values
1.st International Conference Energy Systems Engineering
ıcese'17
Burak TANYERİ
Cengiz ÖNER
Fatma TEBER
Hüseyin SEVİNÇ
A smart home is one that serves automatic house
management and remote control system to its homeowner. It is
the integration of technologies applied to homes, offices and
small buildings to provide security, comfort, communication and
energy saving with less human interaction. Home technology is
the adaptation of control systems used in many fields of industry
to daily life, while home automation is the application of these
technologies to individual needs and desires. One of the most
important features of smart house is that it can be remotely
controlled and monitored when necessary. Thanks to this system
that can be controlled via Raspberry Pi-based web, users will be
able to access the system from smartphone, laptop, tablet,
desktop computer. In this low-cost system, it is aimed to use
technology easily in daily life. Additionally, intelligent home
technology can be carried out more easily and more effectively
by means of building information modeling technology. Room
temperature control system module, lighting system based on
daylight module, a security camera system module controlled by
PIR sensor, parking sensor module via ultrasonic HC-SR04
sensor are realized in this project.
1.st International Conference Energy Systems Engineering
ıcese'17
Nesrin Aydın Atasoy
Mehmet Tankül
Ferhat Atasoy
Dünyada teknolojik gelişmelere bağlı olarak artan enerji
talebinin yanı sıra birçok enerji kaynakları da hızlı bir şekilde
azalmaktadır. Bu enerji kaynaklarında yararlanılırken küresel
ısınma, iklim değişikliği ve sera etkisi gibi çevre ile ilgili
problemlerin oluşmasına yardımcı olan kirletici ürünler ortaya
çıkmaktadır. Bu enerjilerin kullanımı çevreye zarar verdikleri
için, bunların yerine çevre ile dost, yenilenebilir kaynakların
kullanımı araştırılmaktadır. Bu kaynaklar sırasıyla; güneş,
rüzgâr, hidrolik, jeotermal, dalga, biokütle ve hidrojen enerji
kaynaklarıdır. Bu çalışmada, yakıt pillerinin tanıtımı yapılarak,
enerji teknolojisindeki uygulama alanları temel hatları ile
sunulmuştur. Çalışmada, yakıt pili ve yapısı, çalışma prensibi,
kullanılan yakıtlar, yakıt pili çeşitleri hakkında bilgiler
verilmiştir.
-In addition to rising demand for energy in the world
due to technological developments, many energy sources are also
rapidly declining. When utilized in these energy sources,
pollutant products are emerging that help to create
environmental problems such as global warming, climate change
and greenhouse effect. Since the use of these energies harms the
environment, instead of these they are exploring the use of
environmentally friendly, renewable resources
These sources are; solar, wind, hydraulic, geothermal,
wave, biomass and hydrogen energy sources. In this study, the
fuel cells are introduced and the application areas of energy
technology are presented with basic lines. In the study,
information was given about the fuel cell and its structure,
working principle, used fuels, fuel cell types.
1.st International Conference Energy Systems Engineering
ıcese'17
Cumali İLKILIÇ
Cengiz ÖNER
Zeynep İLKILIÇ AYTAÇ
Halis DEVİREN
Hanbey HAZAR
The prediction of ship resistance has a vital
importance for the hull form design for better performance. In
the last decade, computer simulations have been widely used by
the ship designers. Within the developments in computer
technology, some software’s have been applied to a variety of
problems in ship hydrodynamics, especially prediction of ship
resistance. In particular, these factors have a direct effect on fuel
consumption and economy, therefore it is necessary to design
more effective and energy-efficient hull form. So, these efforts
contribute to greener ships. Design of boat underwater forms
directly affect the resistance characteristics. Thus, the required
hull form optimizations of boats should be done during the
design phase.
In this study, computer-aided resistance and effective power
estimation by using Compton method for a semi-displacement
mono-hull motorboat designed and built for Bartın University
are presented. The hull form is modeled and generated the
surface structure in 3-D. Analyses are then performed on a
personal computer system. By the numerical results, total
resistance is calculated for the ship model. The main aim of this
study is the estimation of the ship total resistance and effective
power for main engine selection
1.st International Conference Energy Systems Engineering
ıcese'17
Sabri ALKAN
Bu çalışmada bir yayınımlı soğurmalı soğutucuda helyum
gazı basıncının buharlaştırıcı sıcaklığına etkisi deneysel olarak
incelenmiştir. Bunun için soğutucuya kütlesel olarak %25’lik
amonyak-su çözeltisi şarj edilmiştir. Basıncın etkisini görmek
amacıyla soğutucu 5bar, 10bar ve 15bar olmak üzere üç farklı
helyum gazı basıncında çalıştırılmıştır. Yapılan deneyler sonucu
5bar, 10bar ve 15bar için buharlaştırıcı giriş sıcaklıkları sırasıyla
19.8°C, -4.5°C ve -6.0°C olmuştur.
1.st International Conference Energy Systems Engineering
ıcese'17
Engin Özbaş
Ramazan UÇAR
Günümüzde özellikle konutlarda kullanılan bireysel
ısıtma sistemlerinin ülkemizin yakıt tüketimi üzerinde etkin bir
rol oynamaktadır. Bireysel ısıtma sistemlerinde kullanılan kombi
ve benzeri cihazlarda genellikle çift borulu tesisatlar ile mobil
sistem (kollektörlü) tesisatlar kullanılmaktadır. Kullanılan
tesisatlar da çoğunlukla yakıt olarak doğalgazın kullanıldığı
bilinmektedir. Ülkemizde doğalgazın yaklaşık % 80’lik kısmının
yurt dışından temin edilmektedir. Bundan dolayı bireysel ısıtma
sisteminde kullanılan tesisatların harcadığı yıllık yakıt
tüketimleri ülkemiz ekonomisinde önemli paya sahiptir. Bu
çalışmanın amacı, bireysel ısıtma sistemlerinde kullanılan çift
borulu tesisat bağlantısının ve aynı zamanda kollektörlü tesisat
bağlantısının aynı şartlar altında harcadıkları yıllık yakıt
tüketimleri incelenerek yakıt miktarları arasındaki değişimlere
bakılmıştır. Bununla birlikte ortaya çıkan sonuçlar ışığında yakıt
tüketimini etkileyen faktörler ve aynı zamanda enerjinin
kullanımının daha verimli hale getirilmesi için tesisatların
karşılaştırılması yapılarak avantajları ve dezavantajları ortaya
konulmuştur.
Today, especially in individual heating systems used
in housing plays an active role on the fuel consumption of our
country. Especially two-pipe and mobile system (collector)
plumbing are used in individual heating systems with Wall-hung
boilers and similar devices. Our country is approximately 80%
of the natural gas from abroad. Therefore, annual fuel
consumption of plumbing used in individual heating systems has
an important role in our economy. In this study, annual fuel
consumption of two-pipe and collector plumbing connections in
individual heating systems and changes on fuel amount under
same conditions were examined. Also, with these results factors
that effects fuel consumption were presented and comparison
and advantages/disadvantages of plumbing that will make energy
consumption more efficient were demonstrated.
1.st International Conference Energy Systems Engineering
ıcese'17
Metin KAYA
Murat KORKMAZ
The aim of the study is to experimentally investigate
the useful efficiency at the highest heat power and at the partial
heat of the condensing hot water boiler which power is 980 kW.
Natural gas with a lower heating value of 8400 kcal / m3 was used
in the study. During the test, the pressure of the stand is 4 bar
and the ambient temperature is 15 °C. Without condensation,
the measured efficiency at the highest heat power was 97.7%
when the boiler water return temperature was 60 °C and the
boiler water outlet temperature was 80 °C, while the measured
efficiency at the partial load was 96.5% at 30% of the nominal
heat input when the average water temperature was 50 °C. The
CO value during the experiment was measured as 9 ppm. The
useful efficiency in the partial load at the condensation was
measured as 107.6% at a return temperature of 30 ° C and The
CO value was measured as 1 ppm. It was observed that
condensation occured intensively at the second and third
transition pipes when the boiler was operated under conditions
of 30 °C return water temperature. It was determined that the
efficiency of the boiler increased by 11.5% when condensation
occured. The study can help in the selection of boilers used in
central heating systems and in the work to be done to increase
efficiency in boilers.
Yapılan çalışmanın amacı 980 kW gücündeki yoğuşmalı
sıcak su kazanının en yüksek ısı gücünde faydalı veriminin ve
kısmi yükte faydalı veriminin deneysel olarak incelenmesidir.
Yapılan çalışmada alt ısıl değeri 8400 kcal/m3 olan doğalgaz
kullanılmıştır. Deney esnasında standın basıncı 4 bar, ortam
sıcaklığı 15 ℃ ’ dir. Yoğuşma olmadan, kazan suyu dönüş
sıcaklığı 60℃ , kazan suyu çıkış sıcaklığı 80℃ olduğunda en
yüksek ısı gücünde ölçülen verim %97,692 iken anma ısı
girdisinin %30’undaki ortalama su sıcaklığı 50℃ olduğundaki
kısmi yükte ölçülen verim %96,516’dır. Deney esnasında CO
değeri ise 9 ppm olarak ölçülmüştür. Yoğuşmadaki kısmi yükteki
faydalı verim, 30℃ dönüş suyu sıcaklığında %107,56, CO değeri
1 ppm olarak ölçülmüştür. Kazan 30 ℃ dönüş suyu
sıcaklığındaki şartlarda çalıştığında yoğuşmanın ikinci ve üçüncü
geçiş borularında yoğun bir şekilde oluştuğu görülmüştür.
Yapılan çalışma neticesinde yoğuşma olduğunda kazanın
veriminin %11,44 arttığı tespit edilmiştir. Yapılan çalışma,
merkezi ısıtma sistemlerinde kullanılan kazanların tercihinde ve
kazanlarda verimliliğin artırılmasına yönelik yapılacak
çalışmalara yardımcı olabilir.
1.st International Conference Energy Systems Engineering
ıcese'17
Mustafa Bahadır Özdemir1
Mehmet Mustafa Yatarkalkmaz
Halil İbrahim Variyenli