SEARCH RESULT

— Nowadays, the demand for energy has increased in parallel with the increasing world population and the necessity to provide diversity in energy supply has emerged. It is of great importance to ensure energy efficiency and to improve waste heat recovery applications in sectors where energy is used intensively in supplying this energy demand and supply diversity. How much more energy if the benefit is reduced to that amount of production costs and emissions, emission caused environmental problems by reducing wastes, imply avoided. In this study, the evaluation of waste heat generated by steel production with basic oxygen furnace by absorption cooling system is investigated. In this study, theoretical analysis and inference method was used. The obtained results showed that the energy thrown into the atmosphere as a waste heat is evaluated with the right methods and it contributed positively to the environment, production costs and yield.

International Iron & Steel Symposium
UDCS

Aytaç AYDIN Mustafa Karagoz Emrah Deniz

Today, the most important factors in the evolution of people's living standards are the development of industrialization and production capabilities. In the industrial sector, fossil-based energy sources are widely used and cause production costs to increase and competitiveness to decline, especially in countries that are dependent on energy supply. In addition to this, the use of energy as efficiently as possible and the recycling of waste energy can reduce both costs and adverse environmental problems. In the study, the use of the waste heat from the basic oxygen converter process used in the iron and steel industry has been examined again to meet the demand for demineralized water and to convert the overproduced water into a financial resource and to avoid adverse environmental effects. For this purpose, a demineralized water production system that operates on the basis of a humidification-dehumidification method compatible with the amount of waste heat, whose investment costs are more advantageous than other methods, is designed and the production capacity is calculated. It has been determined that the obtained data is at a very high level of demineralized water producing potential of the designed system and that this recycling application can be funded considerably.

International Iron & Steel Symposium
UDCS

Aytaç AYDIN Mustafa Karagoz Emrah Deniz

Today, rapid industrialization, manufacturing innovations and the growing population rate has caused an increase in energy needs in many countries. This increase in energy needs of people to produce more energy, energy efficiency and led the search for renewable energy. The next few centuries studies renewable energy sources and focus on the efficient use of energy has been caused because of run out of fossil origin fuels. The industrial sector of energy consumption of fossil origin energy sources are widely used and especially in countries that are dependent on foreign energy supply of increased production costs and causes it to fall of its competitiveness of firms. How much more energy if the benefit is reduced to that amount of production costs and emissions, emission caused environmental problems by reducing wastes, imply avoided. In the study, both the iron & steel industry is being used in basic oxygen converter process occurring from organic rankine cycle from waste heat produced electricity with satisfying the energy needs of a partition and use in order to prevent negative environmental impacts have been studied. To this end, the waste heat from power generation system with organic rankine of cycle designed and production capacity was calculated. The data from the potential for producing electricity system designed fairly high level, and that substantial financial resources through the application of recycling have been identified that can be instantiated.

International Iron & Steel Symposium
UDCS

Mustafa Karagoz Aytaç AYDIN Emrah Deniz

— In our day, due to the both depletion of the reserves and the significant environmental problems of fossil based fuels, efforts to improve and smooth use of alternative energy sources have gained momentum. The work on alternative energy sources is mainly focused on the solar, wind and biogas fields and studies have been carried out and being continued to carry out to develop new systems and application methods in order to develop these resources. Biogas, one of the alternative energy sources, is a gas which is obtained by deterioration of biological wastes in a anaerobic environment. The pollutants in the biogas can decrease the lower heat value of the fuel and also cause corrosion and rust in the equipment and components used. Therefore, before using the biogas, it is necessary to remove contaminants in it. In this performed study, biogas has been produced from animal waste by co-fermentation method. In order to purify the pollutant gases in the produced biogas content, the effect of granular slag (an iron steel plant waste) in H2S removal from the biogas, has been experimentally investigated for different flow rates. As a result of the experiments, it was determined that the 198 ppm H2S value of the biogas measured before entering the purification tower with slag material was purified with a ratio of 76,8% and decreased to 46 ppm without methane loss.

International Iron & Steel Symposium
UDCS

Mustafa Karagoz Nuri TUNÇ Burak Ciftci İsmail EKMEKCİ Emrah Deniz

Abstract: In this study, adaptive neuro-fuzzy inference system (ANFIS) and multi linear regression analysis (MLRA) methods are used to predict the thermal efficiency (TE), brake specific fuel consumption (ÖYT) and volumetric efficiency (VE) values of a biogas engine with spark ignition at different methane (CH4) ratios and engine load values. The biogas used in the experiments is obtained by the anaerobic fermentation from bovine manure. CO2 and H2S in the biogas content are purified to use in the motor. By repeating the purification process, three different biogas fuels having different CH4 content (%51, %57, %87) are produced. The data obtained experimentally from a 4-stroke four-cylinder, spark ignition engine, at constant speed for different load and CH4 ratios are used in the developed models. ANFIS and MLRA models are developed using some of these experimental data, and the developed models are tested with the other part of the data. The CH4 ratio, the engine load, the inlet air temperature (Tin), the maximum cylinder pressure, and the air fuel ratio are selected as the input parameters, and TE, ÖYT and VE are used as the output parameters in the models. It is found that the MLRA models were better than ANFIS method in the prediction of TE and VE, and the result of ANFIS model is better than MLRA method in the estimation of ÖYT. Özet: Bu çalışmada otto çevrimi ile çalışan bir biyogaz motorunun farklı yükleme değerlerinde ve farklı metan oranlarında özgül yakıt tüketimi (ÖYT), volumetrik verim (VE) ve termal verim (TE) değerlerinin tahmini için, uyarlamalı ağ tabanlı bulanık çıkarım sistemi (ANFIS) ve çoklu lineer regresyon analizi (MLRA) yöntemleri kullanılmıştır. Deneylerde kullanılan biyogaz yakıtı büyük baş hayvan atığından anaerobik yöntemle elde edilmiş ve motorda kullanılabilmesi için biyogaz içeriğindeki CO2 ve H2S’in saflaştırılması sağlanmıştır. Saflaştırma işleminin tekrarı ile farklı oranda CH4 içeriğine sahip (%51, %57, %87) üç farklı yakıt elde edilmiştir. Geliştirilen iki farklı modelde de kullanılan veriler, 4 zamanlı, dört silindirli, buji ateşlemeli biyogaz motorunda, sabit devirde farklı yük koşulları altında, üretilen üç farklı yakıtın kullanılmasıyla elde edilmiş deneysel verilerdir. Bu verilerin bir kısmı kullanılarak ANFIS ve MLRA modelleri geliştirilmiş, verilerin diğer kısmı ile geliştirilen modeller test edilmiştir. Modellerin giriş parametreleri yakıtın CH4 oranı, motor yükü, giriş havası sıcaklığı (Tin), silindir içi maksimum basınç ve hava yakıt oranından oluşmaktadır. Modellerin çıkış parametreleri için ise TE, ÖYT ve VE kullanılmıştır. TE ve VE tahmininde MLRA modellerinin ANFIS yöntemine göre daha üstün olduğu ve ÖYT tahmininde ise ANFIS modelinin MLRA yöntemine göre daha iyi sonuçlar verdiği görülmüştür.

International Combustion Symposium
INCOS2018

Mustafa Karagoz Yusuf Kurtgoz Emrah Deniz

Abstract: Increasing energy consumption, depleting fossil fuel reserves and arising environmental concerns have increased the demand form alternative energy sources. Increasing demand for the alternative energy sources also promoted the researches on producing and using cheap, clean and adequate amount of energy. As an alternative energy source, biogas has a high heating value and can be produced by agricultural, animal or biological waste through different production methods. Biogas, according to its methane content, can be used seamlessly in many areas from cooking to electricity production, from cooling to heating. In this study, annual amount of animal waste in Karabuk city is determined and the potential of biogas production from this waste is calculated. Besides, a domestic type biogas plant is designed, and cost analysis is performed. Özet: Son yıllarda artan enerji tüketimi, fosil kaynaklı yakıtların tükenmeye başlaması ve önemli çevresel sorunlara neden olması, alternatif enerji kaynaklarına olan talebin artmasını sağlamıştır. Alternatif enerji kaynaklarına olan talebin artması, ucuz, temiz ve yeterli miktarda enerji üretmek ve sorunsuz kaynak kullanımı konusundaki çalışmaları ivme kazandırmıştır. Alternatif enerji kaynaklarından biri olan biyogaz; tarımsal, hayvansal ya da biyolojik atıklardan farklı yöntemlerle üretimi mümkün olan ısıl değeri yüksek bir gazdır. Biyogaz içeriğindeki metan oranına bağlı olarak pişirmeden, elektrik üretimine, soğutmadan ısıtmaya kadar birçok alanda sorunsuz bir şekilde kullanılabilmektedir. Yapılan çalışmada, Karabük iline ait yıllık hayvansal atık miktarı belirlenmiş, belirlenen atığın biyogaz potansiyeli ortaya koyulmuştur. Çalışmada ayrıca aile tipi bir biyogaz tesisi tasarımı gerçekleştirilmiş ve maliyet analizi yapılmıştır.

International Combustion Symposium
INCOS2018

Mustafa Karagoz Burak Ciftci Emrah Deniz Ahmet Korhan Binark