Refrigerator oil having viscosity corresponded to the cross point of refrigerating capacity curve and refrigerating coefficient curve was the optimum product to obtain optimal refrigeration effect.

制冷量与制冷系数变化趋势的交叉点处为压缩机发挥最佳制冷性能的控制点；

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The relation between the optimal coefficient of performance and the rate of refrigeration of a Carnot refrigerator for an idea or van der Waals gas as a working fluids(?)derived.

导出以理想气体或范德瓦耳斯气体为工质的制冷机最佳制冷系数与制冷率间的关系。

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Study on the coefficient of PTFE heat exchangers and refrigerator, using the theory calculation and experimental methods.

本文通过实验，研究了塑料管溴化锂吸收式制冷机中聚四氟乙烯换热器的传热性能及制冷机组性能。

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And so instead of defining efficiency the way you've got it written there, I'm going to define what's called something different for a refrigerator which is called the coefficient of performance.

现在我们不用,效率的那个定义，我给出一个,有关制冷机的,新的定义,叫做制冷系数。

麻省理工公开课 - 热力学与动力学课程节选