摘要
计入工质与高、低温侧换热器和回热器的热阻损失、压气机和透平中不可逆压缩和膨胀及管路系统中的压力损失,用有限时间热力学理论和方法,导出了变温热源条件下闭式不可逆外燃式燃气轮机(IFGT,Indirectly Fired Gas Turbine,又称EFGT,Externally Fired Gas Turbine)无因次生态学函数的解析式,通过详细的数值计算,得到了最大生态学函数条件下高、低温侧换热器和回热器的热导率分配及工质和热源间的热容率匹配的全局最优解。
Analytical formulae of dimensionless ecological function of an irreversible closed IFGT （Indirectly Fired Gas Turbine, or EFGT, Externally Fired Gas Turbine） cycle coupled to variable-temperature heat reservoirs was derived, utilizing the theory and the method of Finite-Time Thermodynamics （FTT）. In the investigation, the irreversibility involved the heat resistance losses in hot and cold side of heat exchangers and regenerator, the irreversible compression and expansion losses in the compressor and the turbine, and the pressure losses in piping. The global optimization results of the distributions of the heat conductance rate among the hot and cold side o{ the heat exchangers and the regenerator and the thermal capacity rate matching between the working medium and the heat reservoirs under maximum ecological function conditions were attained synchronously by detailed numerical calculations.
出处
《热力透平》
2014年第4期269-275,共7页
Thermal Turbine
基金
国家自然科学基金(10905093)
