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该文研究定常态变温热源制冷机的有限时间热力学性能,导出内可逆卡诺制冷机和布雷顿制冷机的最佳制冷率制冷系数关系,分析了工质热容率(水当量)有限和热源热容率有限对制冷机性能的影响,比较了两种制冷机在相同边界条件下的性能特点。所得结果对制冷机工作参数和工质的最优选择有一定指导意义.
This paper studies the finite-time thermodynamic properties of a constant-temperature, variable-temperature, heat-source chiller and derives the relationship between the optimal cooling rate and the coefficient of heat capacity of the inner-reversible Carnot chiller and the Brayton chiller. And the limited heat source heat capacity on the performance of the refrigerator were compared. The performance characteristics of the two refrigerators under the same boundary conditions were compared. The results obtained for the refrigerator operating parameters and the optimum choice of working fluid has some guiding significance.