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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。
Aiming at the urgent heating demand of mountainous villages and towns in Chongqing, this paper selected the typical villages and towns in this area to set up the experiment platform of air source heat pump heating system, analyzed the influencing factors of air source heat pump system performance, and analyzed the influence factors of air source heat pump system from the supply and return water temperature, system power consumption, (COP), the COP (phase difference) and coefficient of performance (COP) are used to illustrate the characteristics of the system during start-up, steady operation and all phases. The results show that the system has very different characteristics in three stages: initial temperature has a significant effect on COP during start- Decreased by 25%. The characteristics of the stable phase had no relation with the initial temperature. When the outdoor conditions were good, the set temperature was decreased and the COP increased obviously. Generally speaking, the COP was the highest in the startup phase, the lowest in the whole phase, and the lowest in the steady phase.