Performance Analysis of Gas-Steam Combined Cycle with Coke Oven Gas

In this paper, the performance analysis mode has been established for gas and steam combined cycle with coke oven gas according to actual industry. The exergy analysis and calculation are carried on for the specific working condition. The exergy destruction of the whole system mainly concentrates on the combustion chamber and the waste heat boiler. Especially the combustion chamber occupied more than 50% of the exergy loss in the whole system. The thermal efficiency of the whole system reaches 71.42% and the exergy efficiency reaches 62.46% according to design operation condition of the combined cycle system. In order to increase the efficiency of the system, to send up the gas flow appropriately or to decorate the units reasonably for increasing has been prove feasible.