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根据有限时间热力学理论,在给定各换热器总热导率的情况下,对变温热源条件下等温加热过程修正的不可逆回热式Brayton循环的功率特性进行了优化。研究表明,该情况下全局性的优化结果并不存在。在给定CCC(收敛型燃烧室)和回热器热导率分配的情况下,通过数值计算,得到了最佳的透平出口温度及RCC(常规燃烧室)和低温侧换热器的热导率分配,讨论了循环参数对最佳热导率分配的影响。另外,本文还对文献[7]中的错误进行了修正,并分析了循环工质与热源的热容率匹配问题。
According to the theory of finite time thermodynamics, given the total thermal conductivity of each heat exchanger, the power characteristics of the irreversible recuperative Brayton cycle with the isothermal heating process under the condition of variable temperature and heat source are optimized. Research shows that the global optimization results do not exist in this case. Given the CCC (Convergent Combustion Chamber) and Regenerator Thermal Conductivity distribution, the best turbine outlet temperature and RCC (Conventional Combustor) and the heat of the low temperature side heat exchanger are obtained numerically Conductivity distribution, the effect of cycle parameters on the optimal thermal conductivity distribution is discussed. In addition, the paper also revised the error in [7], and analyzed the matching of heat capacity of circulating working fluid and heat source.