【摘要】 评价热泵经济性的最重要的指标之一———性能系数 ,一直以来没有体现出开式系统与闭式系统的不同点 .为此以理论分析为依据 ,提出了计算开式热泵系统性能系数的更完善表达式 ε开系 =( qH +wB) /(we+wB) .同时 ,利用该公式对热泵蒸发系统的性能系数进行了计算 ,并与闭式系统表达式为依据的计算结果进行了比较 ,比较结果进一步显示了传统热泵性能系数计算模型应用于开式热泵蒸发系统的不合理性 .更多还原

【Abstract】 Presents the improved expression for calculating the coefficient of performance for open heat pump system based on theoretical analysis,ε open-system =q H+w Bw e+w B,calculates the coefficients of performance for open and closed heat pump evaporation systems using this improved expression,and compares the results obtained with two different systems,and concludes that the model used for calculation of coefficient of performance for traditional heat pump system is applicable to open heat pump evaporation system.更多还原