一类复杂燃气轮机循环的热力学研究

Thermodynamics Research a Kind of Complex Gas Turbine Cycle

对一类复杂的燃气轮机循环进行了热力学分析和研究,导出了循环输出功、热效率、熵产和火用效率的解析式;通过数值算例,分别讨论了各个性能目标与中冷压比和总压比的关系,并对中冷压比进行了优化;分析了回热度、循环温比、压气机和涡轮机内效率、中间冷却终点温度等循环参数,对性能目标的影响,所得结果对实际燃气轮机装置的参数选择和优化设计具有一定的参考作用。

Thermodynamics analyses and investigation have been performed for a kind of complex gas turbine cycle. Analytical formulae of the cycle work, thermal efficiency, entropy generation and exergy efficiency are derived. The relations of the performance objectives versus intercooling pressure ratio and total pressure ratio are discussed numerical examples, and the intercooling pressure ratio is optimized. The effects of cycle parameters （such as degree regeneration, cycle temperature ratio, efficiencies of compressors and turbine, terminal temperature of intercooling process and so on） on the performance objectives are analyzed. The results obtained in this paper may provide some guidelines for the parameter selection and optimal design of practical gas turbine plant.