不同换热形式的污水热泵工程运行能效分析

Analysis on Coefficients of Performance of Two Sewage-source Heat Pump Projects with Different Heat Exchange Modes

对分别采用直接式、间接式换热系统的两个不同的污水源热泵工程,进行了系统运行参数实测,并计算得到了冬季热泵系统的运行能效比。数据对比表明,直接换热式污水热泵系统的能效比较高,实际工况与样本工况的COP值偏差仅为7%,而间接式系统则为27%。

The operation parameters of two sewage-source heat pump projects with direct and indirect heat exchange modes were measured, and the coefficients of performance （COP） of the heat pump systems in winter were calculated. The data comparison shows that the COP of the heat pump system with direct heat exchange mode is higher than that of the heat pump system with indirect heat exchange mode. For the direct heat exchange mode, the deviation of COP between the actual condition and the standard condition is 7% , while for the indirect one, it is 27%.