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Accelerated rising for energy needs, energy cost,our dependency on foreign energy sources and also competition conditions as well as in the world also makes it obligatory for the efficient use of existing energy resources in Turkey, therefore the energy saving work stands out in the industry. Iron and Steel Industry is one of the most energy consuming sectors in the world. Energy intensive use of iron and steel sector, its share in total energy consumption in Turkey, 7.5% and the share of industrial consumption is around 22.9%. In iron industry areas where energy consumption is very high, coke plants, blast furnace, coke, electric arc furnaces, annealing furnace, energy plants that supply the furnace, and cooling water and dust holding facilities are carried out to reduce energy expenditures. In the Iron and Steel sector, the share of energy input costs is second after raw material and has a high amount of 15-25%. The share of energy use in production costs is sufficient to show how energy has a priority in the iron and steel industry. Energy management and saving in rolling mills holds an important place in Iron and Steel Industry. In this study, the effect of energy efficiency and efficiency in iron and steel industry has been investigated by making an industrial energy study. In many industries and Iron-Steel sectors keep hold in sector and the effort for keeping the position at enough level with production capacity at competition race, efforts for achieving standards and besides high quality, low cost strategies because of variable energy prices and high energy costs entailed energy saving. Energy saving is an important way to increase predictable winnings and decreases dependence on costs and energy supply.

International Iron & Steel Symposium
UDCS

Yaşar YETİŞKEN İsmail EKMEKCİ Nevzat ŞADOĞLU

Iron and steel sector is one of the most energy intense sector in the world, and industrial furnaces used in this sector have high importance in terms of energy efficiency. Industrial furnaces should be investigated carefully to be able to decrease the production costs. For this aim, firstly, the heat and mass flows through the furnace should be established. Then, waste heat sources should be revealed. Finally, the potential of waste heat recovery should be determined. In this study with a general point of view, waste heat recovery potential of industrial furnaces used in iron-steel sector was evaluated by setting heat and mass balances. The necessary calculations were done to introduce the waste heat recovery potential for the chimney which is one of the most important zone such equipment. In addition, effects of different process parameters (fuel consumption, yearly working hours, flue gas temperature and flue gas oxygen rate) on energy recovery potential were evaluated. Our main conclusion is that energy saving potentials are promising for the furnaces used in iron-steel sector. Furthermore, all the parameters considered in this study are significant in terms of energy efficiency potential.

International Iron & Steel Symposium
UDCS

Şaban PUSAT İsmail EKMEKCİ Hasan Hüseyin ERDEM

— 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

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