To determine the coefficient of performance, the absolute temperatures of the heating and cooling reservoirs must also be considered in some COP equations. This changes the equation so that the absolute temperature of the hot air reservoir and the absolute temperature of the cold air reservoir are ...
To find the coefficient of performance (COP) defined as a ratio of cooling rate to energy used in cooling, the same principle of isentropic expansion of ideal gas is employed and the equation becomes (5)COP=Qcw and (6)COP=μcCp(Ti-Tc)(γ/γ-1)RTi[(Pi/Pc)γ-1/γ-1] in which Qc...
4) coefficient of performance 性能系数 1. Influence analysis of temperatures on coefficient of performance of absorption heat transformer operating with water/lithium bromide; 温度参数对升温型溴化锂吸收式热泵性能系数影响程度分析 2. The fundamental optimal relation between the coefficient of performance ...
A Clapeyron-type equation to estimate the thermodynamic properties of the volume phase transition under load have been derived on the basis of the triphasic equilibrium. The expression for the coefficient of performance is also derived for the transition process. Experiments by using a poly(N-...
What is the coefficient of performance of a refrigerator or an air conditioner? The coefficient of performance, COP, of a refrigerator is defined as the heat removed from the cold reservoir Qcold (i.e., inside a refrigerator) divided by ...
10. To analyze the squeeze film damping effect of MEMS plates with raised strips, an analytical solution is given to calculate the coefficient of squeeze film damping by using Reynolds equation and the first boundary conditions. 针对带有凸条平板的MEMS结构压膜阻尼效应,利用基本Reynolds方程和特定的第一...
This hypothesis was studied with a simple equation relating this coefficient to the coefficient of system performance (COSP), and with a software model based on an R404A refrigeration system installed in a supermarket in north east England. In both approaches the condenser fan power usage was ...
seasonalcoefficientofperformanceheatpumps热泵性能季节系数 系统标签: pumpsseasonalheatcoefficientperformance季节 PurdueUniversity Purduee-Pubs InternationalRefrigerationandAirConditioning Conference SchoolofMechanicalEngineering 2008 SeasonalCoe cientofPerformanceofHeat Pumps EliasKinab EcoledesMinesdeParis DominiqueMarchio ...
The first one makes use of dimensional considerations similar to those used in the classical theory; the second way is based on the instability theory and the third one on certain assumptions concerning the form of the solutions of the equation of motion in the turbulent quasi-steady state. ...
Although most researchers have considered the use of this index, it also has key limitations which may lead to incorrect conclusions regarding the performance of a model. The main limitations of this index are: (1) It is insensitive to additive and proportional difference, and (2) it is over...