INVESTIGATION INTO THE PERFORMANCE OF GAS TURBINE IN COGENERATION PLANT

Gas Turbine plays a major role in power plant especially in cogeneration system which consists of Combined Heat and Power Plant (CHP) and also Gas District Cooling plant (GDC). The main problem that a gas turbine engine encounter is that of efficiency, and one of the ways to overcome this is by increasing the performance of the engine itself before its waste (exhaust) being utilized through cogeneration system. Efficiency of a gas turbine is rated from 23 % to 33 %, and the rest are loses of the system and it being a waste through the exhaust. Cogeneration system has been introduced to improve the efficiency which actually can increase the whole system’s efficiency from 75 % to 85 %. By knowing the factors that leads and affect the engines performance, the percentage of performance can be increased. In this paper the performance of the gas turbine in cogeneration system, will be discussed. This paper will also discuss on the methods to calculate the performance of a gas turbine’s engine which consist of temperature in every stage, chemical reaction due to combustion reaction and fuel composition, engine exhaust flow (expandation) and also the output of the overall engine part.
Keywords-component; Gas turbine, Cogeneration, Efficiency, Performance, Exhaust