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Blast furnaces are essential departments that consuming the largest energy amount in integrated iron and steel factories. Blast furnaces consist of many vital subsections for survival of iron and steel production. Hot stoves are fundamental auxiliary subsections of blast furnaces consuming fuel and providing hot air into blast furnaces. In this study heat recovery and energy saving potential of hot stoves were investigated and new heat recovery possibilities were recommended. For this purpose, energy production costs per unit energy, specifications of hot stoves construction and fuel components were received from Kardemir A. Ş. blast furnace management. Three heat recovery options were considered in order to determine optimum heat recovery device in terms of energy recovery, saving and investment cost.

International Iron & Steel Symposium
UDCS

Erhan Kayabasi Fikret Furtun Mehmet Ozkaymak

In this study, a gas to gas heat exchanger (recuperator) was designed to increase combustion air temperature entering hot stoves by recovering the heat of flue gas released from hot stoves. Firstly, thermal calculations were done for different flow arrangement to determine the most efficient flow option in terms of heat transfer surface area (AR) and recovered heat (QR). In second step, a static simulation method was utilized to determine outlet temperatures of hot and cold flows and temperature distribution in entire recuperator for steady state condition for different three case studies. Thirdly economical calculations were performed to monitor total savings (E) of three case studies. Overall, 2823 kW thermal energy and 95 377 $ economic saving potential was discovered by application of a heat recovery system to conventional hot stoves in our study.

International Combustion Symposium
INCOS2018

Erhan Kayabasi Enes Kilinc Rahman Calhan Ahmet Canan Abdulsamed Tabak Fikret Furtun Kamil Arslan Mehmet Ozkaymak Mehmet Ozalp

Motivated by the global importance on economic and environmental issues of energy consumption, current work presents main status of energy in transport in terms of energy distribution and consumption, energy management and optimization of energy usage methods by the different transport types separately. Modern transport techniques and vehicles, energy usage distribution of the transport types, the ratio of the energy consumption of transport type in global energy usage were investigated. In addition, energy management and route determination and optimization by using different artificial intelligence methods according to transport type transported good type, delivery distances were also taken into account. After a general overview of the status, recommendations on the energetic and economic saving opportunities and optimization of energy management in transportation were given in order to provide less economic and ecologic lose by minimizing energy consumption in global transport.

International Symposium on Railway System Engineering
ISERSE

Özlem Battal Erhan Kayabasi M. Kürşat Çubuk

A fuzzy logic (FL) simulation was used to estimate surface roughness values (Ra) for an n-type single crystalline Silicon (c-Si) ingot cutting operation with a Diamond Wire Saw (DWS) cutting machine. The three parameters affecting surface quality: spool speed, z axis speed and oil ratio in a coolant slurry were assumed as input data for DWS cutting operation. Other parameters such as wire tension, wire thickness, and work piece diameter were assumed as constant. The DWS cutting machine performed 28 cutting operations with different values of the selected three parameters and new cutting parameters were derived for different cutting conditions to achieve the best surface quality by using FL. Wafers 400 μm thick were cut from a same n-type c-Si ingot in a STX 1202 DWS cutting machine. Ra values were measured three times from different regions of the wafers. In present study Ra values corresponding to the cutting parameters, and proper cutting parameters for specific Ra values were determined for DWS cutting using FL.

International Symposium on Industry 4.0 and Applications
ISIA

Savaş Öztürk Cihan Mizrak Erhan Kayabasi Hüseyin Kurt Erdal Çelik

Present study includes an overview about problems and overcoming methods of micro and nano sized defects came out during production of crystalline silicon (c-Si) substrates for electronic applications. All surface treatment steps such as diamond wire saw (DWS), lapping, polishing, micro and nano sized shaping on surface are performed respectively. Defects occurred during and after the operations and reasons of these were investigated and given via the of scanning electron microscope (SEM), reflectance and roughness measurements. Solutions methods explored and results after application of solution methods were evaluated. Reasonable solutions were discovered in order to overcome the problems behind the production a defect-free Si substrate surface for many electronic applications.

International Conference of Advanced Materials and Manufacturing Technologies
ICAMT

Erhan Kayabasi Savas OZTURK Erdal CELIK Huseyin Kurt