即热式空气源变频热泵热水系统性能的试验研究

Experimental Study on the Performance of an Instant-heated and Frequency-conversion Air Source Heat Pump Hot Water System

介绍了一种即热空气源变频热泵热水系统,分析了水路模块与热泵模块的理论耦合,得到冷凝器出水流量和温度与热泵系统制热量的关系,以及承压水箱流量和温度与热泵系统制热量的关系。测试了机组在变工况下给用户提供42℃、6L/min热水的的运行特性,结果表明:运行时压缩机排气比循环加热式热泵热水器的排气温度和压力低并且稳定;运行的环境工况范围大,即在高温43℃和低温-7℃均可运行;制热COP随环境变化呈抛物线状变化,且在43℃、20℃和-7℃时,制热COP分别为12.6、4.5和3.8。

An instant-heated and frequency-conversion air source heat pump hot water unit was introduced.The essay includes the theoretical coupling of water way module with the heat pump module.It draws out the relationship between condenser water flow and the heat pump system,and the relationship between pressure tank flow and the heat pump system.The essay also includes the operation when the system produces 42℃,6L/min hot water in changing environment conditions.And the result indicates that the exhaust pressure and temperature are lower and more stable than traditional cyclic-heated heat pump water heater, the system can run in a large and variable environmental conditions such as 43℃ and -7℃,and the heat COP varies with the environment in shape of a parabola,and when the ambient temperature is 43℃,20℃and -7℃,heat COP are respectively 12.6、4.5 and 3.8.