Analysis of finite time thermodynamics on a real combined power cycle

Based on the irreversible heat transfer process in finite time, a thermodynamics model of endo-reversible combined power cycle operating between Internal Combustion Engine and Stirling Engine was investigated. The expressions about power output and thermal efficiency was derived, which were denoted by the compression ratio and temperature ratio and other parameters. The relations between the power output and the temperature ratio, the relation between the thermal efficiency and the temperature ratio, and the relation between power output and efficiency of the combined cycle were analyzed by detailed numerical examples. The results obtained herein can provide the better guidance for the performance study of practical combined power cycle.