Energy and exergy analysis of a coal fired thermal power plant operating at supercritical conditions

Nowadays, because of with the development of industry and growing the life condition, energy using became more important. With increasing the energy using, the serious studying and plannig are made about the energy generation technology, using the natural resource efficiently and the relationship with environment of plant. In the future energy consumption is expected to grow by day. So it is inetivable to use existing reserves of natural resources in the most efficient manner. This will be possible to design power plants and energy consuming device more efficiently. A large part of energy generation of our country in realized in thermal power plant. These power plants, fired the fuels like coal, natural gas and fuel oil etc than thermal energy is converted to mechanical and electrical energy. At coal-fired power plants the fired coal in the furnace heat the water which circulating in boiler. Than water take the form of steam. The steam is superheated with flue gases than enter the steam turbine to rotate generator. After turbine, by entering the condenser steam is returned to the water and continue the cycle. Especially in these systems, make heat recovery for increasing the efficient from the flue gas is very important. In this regard, economiser, superheater, reheater and air preheater devices are used in power plant process for decrease the fuel. Also boiler feedwater should be higher temprature. Therefore, turbine driven boiler feedwater pump and main turbine shaft driven oil pump is using in power plants for increasing the efficient. In the big capacity power plants, supercritical work condition system is designed for increasing the thermodynamic efficient. The power plant efficient is increasing with high steam temperature and steam pressure. In this study, energy and exergy analysis will be done for a supercritical work condition thermal power plant. Also device and general power plant efficient will be calculated and thermoeconomic analysis will be examined.