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本文针对北京市2010年1月出现的持续性低温、冰雪等罕见天气,对采用“喷液增焓技术”的空气源热泵机组进行了为期80 h的连续测试,从机组运行性能、供热性能以及供热效果等方面分析了机组的低温运行特性。研究结果显示,在室外空气平均温度为-11℃的条件下,系统平均COP可达2.21,末端供热需求可得到满足,但机组存在“无霜除霜”以及变频机组频繁启停等问题,影响了系统供热性能的稳定性,是今后需要解决的关键问题。
In this paper, a continuous 80 h continuous air source heat pump unit adopting “liquid injection enthalpy technology ” was used to test the continuous low temperature, snow and other rare weather in Beijing in January 2010, from the running performance of the unit Thermal performance and heating effects and other aspects of the unit’s low-temperature operating characteristics. The results show that under the condition of average outdoor air temperature of -11 ℃, the average COP of the system can reach 2.21 and the end-heating demand can be met, but the unit has “frost-free defrosting” Problems, affecting the stability of the system heating performance, is the key issue to be solved in the future.