线性唯象传热规律下的内可逆不雷逊热机循环的功率、功率密度和效率的性能优化

以在高温热源服从牛顿传热规律而在低温热源服从线性唯象传热规律并考虑了热阻和热漏的布雷逊热机为模型,导出了该热机的输出功率、输出功率密度和效率的表达式。讨论了高温换热器的效率、低温热导和热漏对热机各种性能参数的影响。所得结果可对实际热机的优化设计提供理论依据。

Power, Power Density and Efficiency Optimization of A Linear Phenomenological Heat Transfer Law Endoreversible Braysson Heat Engine

An endoreversible Braysson heat-engine model which obeys the Newton's heat transfer law in the heat source and the linear phenogmenological heat transfer law in the heat sink and considers heat-resistance and heat leak is set up in this paper.The expressions of output power,output power density and efficiency of the endoreversible Braysson heat engine are derived.The influence of the efficiency of hot-side heat exchanger,the heat conductances of the clod-side exchange and heat leak on the performance parameters of this engine is discussed.The results obtained here provide some significant guidance for the optimal design and operation of practical heat-engine.