变温热源制冷系统有限时间热力学分析

ANALYSIS OF FINITE TIME THERMODYNAMICS FOR REFRIGERATING SYSTEM WITH VARIOUS TEMPERATURE HEAT SOURCES

一、前言 有限时间热力学研究大都假定热源热容为无限大。也有学者研究有限热容热源和外部加热的影响。但关于实际制冷循环的研究还不多,文[3]和[4]从不同角度导出了基本优化公式,如最佳制冷系数与制冷率间的关系。 作者提出性能面积比ε/A为目标函数,并探讨该参数对实际制冷系统设计的指导意义。

In this paper the theory of finite time theromodynamics is applied to analyze the performance of a Carnot refrigeration system having external irreversibilities and a vapor compression refrigerating system. The parameters of unit structure and actual gas state equation are used. The ratio of performance and area e/A are analyzed. Using it as a objective function, an optimal COP value are calculated.