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The coefficient of performance (COP) of PV-SAHP is improved because the evaporating process under insolation. 另一方面，PV-SAHP系统热泵循环的的蒸发过程在太阳直接辐照条件下完成，使得热泵循环的性能系数COP明显提高，也减少了热泵冬季供暖时常出现的运行不稳定和结霜等缺憾。
The coefficient of performance(COP) can reach 10.4 and the average value is about 5.4.The average photovoltaic efficiency is around 13.4%. PV-SAHP系统平均性能系数为5.;4;最高COP可达10
The results show that the refrigeration performance of DME is similar to R134a and the coefficient of performance(COP) is higher than the COP of R134a. 分析表明:二甲醚的制冷性能与R134a基本相似,而性能系数(COP)却优于R134a。
The structure of the system was simplified dramatically, whereas the coefficient of performance (COP) was still comparably high. 为了开发新型制冷器，将升膜理论应用到氨水吸收式制冷系统中，用一个冷凝发生器来实现精馏塔的作用。
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.
Comparing this cycle with the evaporation compression refrigerating cycle, the new cycle has more high coefficient of performance ( COP ) under the same condition. 该循环与现在冰箱中所采用的蒸气压缩式制冷循环相比较，在条件相同的情况下具有较高的性能系数。
The results show that the refrigeration performance of DME is similar to HFC134a and HC600a and the coefficient of performance(COP) is higher than that of HFC134a and HC600a. 分析表明:制冷剂DME的制冷性能与HFC134a和HC600a的制冷性能基本相似,性能系数(COP)却优于HFC134a和HC600a。
A comparison of coefficient of performance (COP) of the new double-effect NH3-H2O absorption cycle was made with those of for the traditional single-effect and doublestage cycles. 热泵蒸发温度与热水入口温度越高,产生适宜出口温度的热水流量调节范围越大,出口温度相同时则系统能效比越高;
In the meantime, it is compared with high-pressure dewater system on system bleed air flow, ram air flow, system weight and system coefficient of performance. 并在系统引气量、冲压空气流量、系统重量、系统性能代偿损失等方面与现有高压除水系统进行了比较。
Using numerical simulation method, detailed dynamic pressure variations, transient gas temperature and mass flow rate in the PTR, and the coefficient of performance of PTR and the exergy losses of all parts of PTR were obtained. 用数值模拟方法得到了制冷机内部各点的压力、温度、质量流率等参数的瞬时变化情况及整机的制冷系数，并得到了制冷机各部件的（火用）损失及整机的（火用）效率。
The cooling mechanism and some basic characteristics of the system, such as entrainment ratio, coefficient of performance (COP) were analyzed. These system characteristics in use of R22 and water respectively as a working fluid were calculated. 描述了其工作原理 ;讨论了关于喷射系数和系统性能系数COP的计算方法 ;分别采用R2 2和水为制冷工质 ;进行多次计算取得最大喷射系数 ;并对系统性能系数COP作了定量的计算 .
The results computed show that 9 5% of coefficient of performance( COP )AND 6 7% of cooling power at 80 K could be gained,if a mixture pair of 10% nitrogen and 90% helium is used instead of pure helium for the pulse tube refrigeration. 计算结果表明 ,如果用10%25氮与 90%25氦的混合工质对代替纯氦 ,脉管制冷机在 80K温度下的制冷系数和制冷量分别可以提高 9 5%25和 6 7%25。
In addition,only sensible cooling is performedby mechanical refrigerating system,so the higher evaporating temperature is required and consequently the coefficient of performance,COP,of mechanical refrigerating system will be higher. 而且由于机械制冷仅仅被用于消除显热，所以可以提高制冷系统的蒸发温度从而提高制冷系统的性能系数。
The results show that the cooling capacity and the coefficient of performance (COP) of the system depend mainly on solar radiation intensity, generating and condensing pressure, as well as evaporating temperature. 研究结果表明太阳能毛细驱动蒸汽喷射式制冷系统的制冷量和性能系数主要受太阳辐照强度、发生压力、冷凝压力和蒸发温度的影响;
On the basis of these results, the optimal operating temperature of the solar collector and the maximum overall coefficient of performance (COP) of the cooling modes of the system are derived. 又在此基础上，结合太阳能集热器作为系统的热源，对整个系统的最优综合性能进行分析，得出了最优集热器的运行温度以及在该温度下的系统最优综合效率性能系数。
The effect of main operation parameters (evaporation temperature, condensation temperature, cycle ratio and the concentration of weak solutions) on the coefficient of performance (cop) was studied. The optimal parameters are obtained. 本文对TFE/NMP吸收式热泵的理想循环进行了模拟，研究了主要操作参数如蒸发温度、冷凝温度、循环倍比、进料浓度等对性能系数COP的影响并结合试验结果得出了最优参数。
Based on experiment, the performance of the lake water heat pump system at heating mode was studied, its energy consumption and Coefficient of Performance (COP) were calculated and analyzed. 通过实地测试,对研究对象冬季供暖工况运行特性和参数匹配进行了试验研究,计算了该系统的性能系数(COP值),分析了其运行状况;
In this paper, an irreversible model of four-heat-source absorption refrigerator is proposed and the optimal relationship between refrigeration rate, coefficient of performance(COP) and distribu- tion ratio of heat transfer areas is investigated. 本文提出了一种不可逆的四热源四温度位吸收式制冷机模型，研究其最佳制冷率，性能系数和传热面积之间的优化关系，并进行了讨论，获得了一些有意义的新结论；
Capable of performing sexually as a male; potent. 有性交能力的作为男性能进行性交的能力的; 有性交能力的
The two-stage generation is adopted at higher heating temperature in absorption refrigeration system for higher coefficient of performance (COP), but the generation pressure increases to a great extent only with ammonia as refrigerant. 在较高的热源温度下 ,吸收制冷系统需采用双效再生流程提高制冷性能系数COP ,从而却使只用氨作为制冷剂的系统再生操作压力大幅度增高。