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考虑一类存在热漏和低温热源有限的两热源制冷机，寻求其在给定循环周期和吸热量（也即给定制冷率）下制冷系数最大的最优构型。所述模型包括了４种特殊情形：（１）无热漏且无限热容低温热源；（２）无热漏但低温热源有限；（３）有热漏但低温热源无限；（４）有热漏且低温热源有限。分析中设传热服从牛顿定律。结果表明，对无限热容热源情形，热漏的存在不改变循环最优构型；对无热漏情形，有限热容热源使循环构型成为某种“广义卡诺制冷循环”；同时存在热漏且有限热源时，循环的构型与前几种完全不同。
Consider a class of two heat-source chillers with heat leak and low-temperature heat source, and find the optimal configuration with the highest cooling coefficient for a given cycle and heat absorption (ie, given cooling rate). The model includes four special cases: (1) no heat leak and infinite heat capacity low temperature heat source; (2) no heat leak but low temperature heat source is limited; (3) there is heat leak but low temperature heat source is unlimited; (4) Leakage and low temperature heat source is limited. Heat transfer in the analysis obeyed Newton’s law. The results show that the existence of heat leak does not change the optimal configuration of the cycle for an infinite heat capacity heat source. For the case of no heat leakage, the finite heat capacity heat source makes the cycle configuration a kind of “generalized Cano refrigeration cycle” Lost and limited heat source, the cycle configuration and the previous few completely different.