内可逆四热源吸收式热变换器的基本优化关系及其性能分析

应用内可逆四热源吸收式热变化器循环模型，分析热变换器受传热不可逆性影响时的基本性能。导出了牛顿传热定律下循环的比泵热率和泵热系数的基本优化关系以及工质的最佳工作温度和传热面积的最佳分配关系。由此讨论了循环的各种优化性能，并通过数值算例，得出循环参数对循环特性的影响规律。所得结果对实际四热源吸收式热变换器的优化设计具有一定指导意义。

THE OPTIMAL RELATION OF AN ENDOREVERSIBLE FOUR-HEAT-RESERVOIR ABSORPTION HEAT-TRANSFORMER AND ITS PERFORMANCE ANALYSIS

On the basis of a four-heat-reservoir endoreversible absorption heat-transformer cycle model with linear heat transfer law, the fundamental optimal relation between the specific heating load and the coefficient of performance, as well as the optimal temperature of the working substance and the optimal heat transfer surface areas of the heat exchangers are derived using finite-time thermodynamics. Moreover, the effects of the cycle parameters on the cycle characteristic were studied by detailed numerical examples. The results can provide some guidance for the optimal design of practical absorption heat-transformers driven by solar energy.