二热源制冷机的(εR)_(max)

(εR)_(max) of a Two-Heat-Source Refrigerator

指出二热源制冷机的制冷系数ε与制冷率R 的乘积εR存在最大界限(εR)_(max)。它是制冷机的一个重要性能参数。讨论了三种不同情况下(εR)_(max)的主要特征,所得结果将有助于对实际制冷机各种性能界限的进一步了解,并可对制冷机最佳工作状态的选择提供一些新的理论依据。

It is first pointed out that there exists a maximum bound (εR)max for the product εR of the coefficient of performance e and the rate of refrigeration R of a two heat-source refrigerator, and (εR)max is an important performance parameter of refrigerators. Then the main characters of (εR)max are discussed under three different cases. The results obtained here will be helpful to the further understanding of the various performance bounds of practical refrigerators, and they can provide some new theoretical bases for the optimal choice of the working state of refrigerators.