Heat losses and energy analysis of reheating furnaces in rolling mill

Today, although energy consumption has started to be considered as a measure of development, countries are trying to quickly control energy consumption due to limited energy resources and environmental reasons. For this reason, there is an increasing demand for energy management especially in high energy consuming sectors such as the iron and steel sector. The foundation of energy management is based on the determination of the energy entering the facility and the areas of use and the amount of energy thrown. Considering limited energy resources and environmental factors, an analysis of a furnace operating in the iron and steel sector, one of the sectors with high energy consumption, was carried out. In the study on the basis of the energy balance basis, the energy entering into the furnace as well as the walls of the furnace, the amount of heat discharged from the exhaust gas and cooling system are calculated. The resulting data and calculations to reduce energy consumption by taking into account the reheat furnace or into energy has been proposed for more efficient use of alternative methods. As a result of the study, the heat losses of the reheat furnace in the rolling mill operating in the Iskenderun region were investigated and analyzed of energy. Taking into account the first law of thermodynamics, the amount of energy entering and exiting the reheat furnace was determined. As a result of these calculations, the energy of natural gas is 91,63%, the energy of the air is 6,94%, the energy of absorbed the cold billet is 1,44%, the energy of absorbed the hot billet was 60,69%, the wall surface losses 7,76%, the infiltration losses 0,81%, the flue gas energy loss 28,54% and the other can not be calculated losses 2,2%. As a result of these values, the reheat furnace's thermal efficiency was 60,12%. Considering these calculations, the system performance improvement methods were investigated and discussed within the scope of the study.