重庆村镇空气源热泵供暖系统夜间性能实测分析

针对重庆山地村镇迫切的供暖需求，选取该地区典型村镇搭建了空气源热泵供暖系统实验平台，分析了空气源热泵系统性能影响因素，并从供回水温度、系统耗电量、供热量、性能系数COP等角度对运行过程中的阶段特性(启动、稳定运行及全阶段)进行阐述，发现系统在3个阶段特点差异很大：启动阶段初始温度对COP影响较为明显，除霜时系统性能下降25%；稳定阶段特性与初始温度无关，室外条件较好时，降低设定温度，COP提高明显；总体来看，启动阶段COP最高，全阶段次之，稳定阶段COP最低。

Nighttime performance analysis of air source heat pump heating system in Chongqing rural residential

According to the urgent requirements for the winter heating in a rural residential in Chongqing, it has set up air-source heat pump heating system experiment platform. From the perspective of supply and return water temperature, power consumption, heat supply and coefficient of performance (COP), it has analyzed the system performance factors and phase characteristics (including starting, stable operation and whole stage) during operation, and the system has been very different characteristics in this three stages. Primarily, the initial temperature of the starting phase has obviously influenced COP of the system and when defrosting, it has a 25% drop in performance of the system. For stable operation of the stage, the performance and the initial temperature are not related. Reducing the set temperature, the COP has increased significantly, when there has been a good outdoor condition. Overall, COP in starting stage is the highest, then the whole stage, and COP of stable operation is lowest.