水源热泵机组变工况性能的实验研究

Experimental study of performance with variable operating condition for water source heat pump units

由于吸热源(或放热源)的温度及水流量不同,水源热泵机组运行工况往往远远偏离名义工况,因此机组实际性能与名义工况相差较大。但厂家给定的数据往往只有名义工况的性能参数,缺乏变工况性能的参数。本文通过实验研究给出了水源热泵机组在蒸发器侧变水量、冷凝器侧变水量、部分负荷以及冷冻水出口温度变化四种工况下机组性能测试数据,并对结果进行了分析。结果表明,冷却水流量的变化对机组性能的影响远大于冷冻水流量的变化。

Because the difference of extracting heat source（ or releasing heat source） in the temperature and water volume, the operating condition for water source heat pump units is always deviated from normal condition. So the performance of units in operating condition is different from that in normal condition. But producer only supply the rating without data in variable condition. The measured data of heat pump performance are given in such four different operating conditions for water source heat pump units as the condition of varying water volume change in evaporator side and in condenser side, part load and cooled water outlet temperature change The data analysis shows that the effect on heat pump performance by the change of cooling water volume is more than that by the change of cooled water volume.