E111 Development of Gas Engine-Gas Turbine Combined Cycle Systems

The integration of gas engine with gas turbine was developed as a potential high thermal efficiency technology for the advanced combined cycle systems. The high performance analysis was carried out to obtain the best engine operating condition in combined cycle systems. The effect of engine suction/exhaust pressure on the system performance was analyzed and found to be one of the major parameters. The engine pressure of LPS/LPE (low pressure suction and exhaust) and HPS/LPE (high pressure suction and low pressure exhaust) are proposed as the preferable conditions, enabling the expected thermal efficiency of around 65%LHV even with a low temperature gas turbine (TIT 1200℃ class).