小型住宅用空气源热泵制热运行特性实验研究

Research on heating performance of air source heat pump system in small residential buildings

对小型住宅用空气源热泵系统在使用制热运行时的性能进行实验研究,通过改变室内外干球温度探究热泵系统的冷凝压力、冷凝温度、蒸发压力、蒸发温度对系统功率、制热量、制热系数的影响。结果表明,当系统室外干球温度一定,系统冷凝压力、冷凝温度、系统功率随室内设定干球温度的升高而升高,系统制热量、制热系数随室内设定干球温度的升高而降低,室内干球温度每升高1℃,制热量降低1.62%,制热系数降低1.27%。当系统室内干球温度一定,系统蒸发压力、蒸发温度、系统制热量、制热系数随室外干球温度的升高而升高,系统功率随室外干球温度的升高而降低,室外干球温度每升高1℃,制热量增加1.75%,制热系数增加2.23%。实验结果显示室外干球温度比室内干球温度对系统性能的影响更大。

In order to estimate the heating performance of air source heat pump system in small residential buildings, experimental tests were taken to explore the variation of condensing pressure, condensing temperature, evaporating pressure, evaporating temperature, power consumption, heating capacity and COP by changing the indoor dry - ball temperature and outdoor dry - ball temperature. The results show that under the same outdoor dry - ball temperature, the condensing pressure, condensing temperature and power consumption increase with the indoor dry -ball temperature increase, but the heating capacity and COP decrease. If dry - bulb temperature of indoor air increases by 1℃, followings decrease by 1.62% in heating capacity and 1.27% in COP. Under the same indoor dry - ball temperature, the evaporating pressure, evaporating temperature, heating capacity and COP increase with the outdoor dry - ball temperature increase, but the power consumption decrease. If dry - bulb temperature of outdoor air increases by 1 ℃. followings increase by 1.75% in heating capacity and 2.23% in COP.