本文讨论受热阻影响的二热源制冷循环的最优化问题。对循环周期τ和工质在膨胀过程中的熵变σ给定的情况下,导得了各种性能界限。这些性能界限比起可逆界限更有现实意义,指明了不可逆性和约束条件对循环性能的具体影响。此外,还指出,循环时间的最优分配是放热的时间比吸热的时间长。 This article discusses the optimization problem of two heat source refrigeration cycles affected by thermal resistance. Given the cycle τ and the entropy change σ of the working fluid during expansion, various performance limits have been derived. These performance limits are more realistic than reversible limits, pointing out the specific impact of irreversibility and constraints on the performance of the cycle. In addition, it is also pointed out that the optimal distribution of cycle time is the exothermic time longer than the endothermic time.