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 %。
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。
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。
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。
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。
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。
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。
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。
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。
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。
The influences of generation temperature, evaporation temperature, absorption temperature to the coefficient of performance, circular ratio and cooling capacity were also studied.
并讨论了循环的发生温度、蒸发温度、吸收温度对循环性能系数、循环倍率和制冷量的影响。
The present invention provides a heat pump with a high coefficient of performance and a dehumidifying apparatus that consumes a small amount of energy per amount of moisture removal.
根据本发明，提供一种具有高性能系数的热泵、及一种每单位水分去除量仅需消耗少量能量的减湿设备。
The results show that the parallel-flow cycle yields the highest coefficient of performance among the cycles while the maximum pressure and temperature in the reverse-flow cycle are lowest.
结果显示在不同的循环方式中，平行流系统产生最大的热力系数而逆串联系统的最高发生温度和压力比其他系统都低。
To meet the designed target of the AHT experiment, we assign the coefficient of performance as the objective function, and optimize the system cycle in a specified range of operating parameters.
针对高温热泵样机的设计要求，以系统性能系数为目标函数，对循环系统进行了有限定范围的优化。
Comparing with traditional construction materials, the ceramic grain concrete possesses the advantages of smaller thermal conductivity coefficient, less weighty and better structural performance.
与传统的建筑材料相比，陶粒混凝土具有导热系数小、重量轻、结构性能好等优点。
A set of formulas for the computation of quadratic performance function associating with first and second-order sensitivities of feedback coefficient matrix is given in this paper.
本文给出了连续系统中计算二次型性能函数对反馈系数阵的一阶和二阶灵敏度的全套公式。
The correlative coefficient between desired signal and interference affects the filtering performance strongly, which changes the direction of optimal interference.
期望信号和干扰信号相关性越强，阵列滤波性能差异越明显，且相关系数的相位影响着“最佳”干扰信号的空间到达角。
The experiment shows that by changing the velocity coefficient , the separation of boundary layer on pump vane can be controlled, and the performance of pump is improved and its hydraulic efficiency.
实验证明通过改变叶片型线参数方程中的速度系数的取值，可以控制边界层的分离，进而改善泵的性能，提高其水力效率。
Reducing the inlet temperature of cooling water and increasing its mass flow are favorable to increase refrigerant performance coefficient, and can decrease optimal pressure at high pressure side.
降低冷却水进口温度和提高其质量流量不仅有利于提高制冷性能系数，而且能降低最佳高压侧压力。
Secondly, in the prefabricated system, through the addition of raw materials with lower heat conduction coefficient, raising warming performance of lining material.
其次，在该预制件体系中通过添加导热系数较低的原料，提高内衬材料的保温性能。
The determination of material structure, performance parameters and membrane resistance, membrane diffusion coefficient of the F4112 ion exchange membrane were introduced.
介绍了F4112离子交换膜的材料结构、性能参数及膜电阻、膜中扩散系数的测定方法。
High strength bolts are widely applied in engineering practice. The torque coefficient is important evaluation parameter of their performance class.
高强度螺栓广泛地应用于工程领域，扭矩系数是评定其性能级别的重要参数。
The intake port performance (swirl number, flow coefficient) has an important effect on power, economy and emissions of diesel engine.
进气道性能(涡流强度、流量系数)对柴油机的动力性、经济性和排放有重要影响。
Changes of sidewall sweep Angle and cowl position can influence inlet performance such as mass capture, total pressure recovery coefficient and uniformity of isolator exit flow field.
侧板后掠角大小和整流罩位置变化时，对进气道的质量捕获、总压恢复系数和隔离段出口流场的均匀性等都有一定的影响。
The disperse coefficient and the volume utilization can be used as criteria to evaluate and compare the performance of hydraulic flocculator.
还提出扩散系数和容积利用率可作为评定絮凝器性能重要指标的观点。
The correlation coefficient is proposed as a criterion to determine the optimal parameter, and evaluate the performance of algorithms. The simulation results demonstrates its possibility.
并提出使用相关系数作为算法最优参数选取和性能评价的标准，计算机仿真实验结果证明了该方法的可行性。
As the key parameter in heat transfer analysis of double skin facade system, the convective heat transfer coefficient is very important in considering energy-efficient and economical performance.
该对流换热系数作为双层换气幕墙传热分析的一个关键参数，对考察双层幕墙热工性能、经济性能有着重要作用。
A test system of pyroelectric coefficient was designed to evaluate the performance of pyroelectric materials.
设计了一个热释电系数测试系统，用它来评价热释电材料的性能。
The design of port is depended on steady flow test to obtain swirl ratio and flow coefficient and use them to evaluate the performance of intake port.
长期以来进气道的设计主要是依靠气道稳流试验测量其涡流比和流量系数来评定气道的性能。
The design of port is depended on steady flow test to obtain swirl ratio and flow coefficient and use them to evaluate the performance of intake port.
长期以来进气道的设计主要是依靠气道稳流试验测量其涡流比和流量系数来评定气道的性能。
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