恒温热源不可逆闭式中冷回热燃气轮机循环的功率和效率

POWER AND EFFICIENCY OF AN IRREVERSIBLE CLOSED INTERCOOLING REGENERATED BRAYTON CYCLE COUPLED TO CONSTANT-TEMPERATURE HEAT SOURCE

用有限时间热力学方法首次研究了恒温热源条件下不可逆闭式中冷回热燃气轮机循环的功率、效率以及中间压比特性,导出了无因次功率及效率的解析式。通过数值计算方法,分析了中冷度、回热度对循环最优功率、最优效率及其对应的中间压比分配的影响。

Finite-time thermodynamics was applied to analyze the characteristic of the cycle dimensionless power output, the cycle efficiency and the optimal intercooling pressure ratio of an irreversible closed intercooling regenerated Brayton cycle coupled to constant-temperature heat source. The analytical expressions of the dimensionless power output and the cycle efficiency were deduced. The effects of the intercooling exchanger and the regenerator on the optimal cycle power output, the optimal cycle efficiency and corresponding intercooling pressure ratio were calculated.