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1·The coefficient of performance at cryogenic temperatures is typically 4-5%.

在性能系数在低温的温度通常是4 - 5 %。

2·The coefficient of performance is taken as an objective function. The performance of the refrigeration system is optimized.

以制冷系数为目标函数，对制冷循环系统的性能进行优化分析。

3·It points out that the relation between optimal heating rate and coefficient of performance of a Carnot heat pump is useless.

指出了卡诺热泵的最佳泵热率与致热系数间的关系是没有实际意义的。

4·Acknowledge the main factors which have influence on coefficient of performance of refrigeration cycle and the way to improve it.

了解分析影响各种制冷循环的制冷系数的主要因素及提高制冷系数的途径。

5·The mathematics model of coefficient of performance for SWHP-RFH is presented after analyzing the operation principle in different conditions.

分析该系统在不同工况运行原理的前提下，建立系统性能系数的数学模型。

6·Through experiment, the relation figures of engine rotation speed, coefficient of performance of heat pump and engine thermal efficiency are presented and analyzed.

通过实验，得出了发动机转速与热泵性能系数、发动机热效率的关系曲线，并进行了分析。

7·Secondly, the curves of the cooling load per unit heat-transfer area varying with the coefficient of performance are investigated based on the fundamental optimum relation.

其次，从基本优化关系式出发，对单位面积制冷负载随制冷系数变化的曲线做详细的研究。

8·The concept of Associated Coefficient of Performance was presented, and the feasibility of air-conditioning system assisted by medium-high temperature heat pump was analyzed.

提出了联合性能系数的概念，分析了利用中高温热泵辅助太阳能空调系统的可行性。

9·Results from the experiment show that there exists a maximum coefficient of performance and it depends on the evaporation temperature and outlet temperature of the gas cooler.

实验结果表明，系统运行时的最大制冷(热)系数取决于系统的蒸发温度和气体冷却器出口温度。

10·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。