环境温度对空气源热泵供暖性能的影响及优化

Influence of ambient temperature on heating performance of air source heat pump

本文计算分析了环境温度、出水温度和负荷平衡点对严寒地区典型城市(哈尔滨)低温空气源热泵供暖性能的影响及其经济性和节能减排效益。结果表明:相同出水温度下,机组输入功率随环境温度升高而降低,而机组能效与之相反;机组搭配地暖末端形式的年运行费用为30.74元/m^2,且与燃煤锅炉相比,供暖季可节约标准煤14.74 kg/m^2;不同负荷平衡点对热泵供暖系统的能效与经济性具有较大影响,对于所选典型城市哈尔滨而言最佳经济平衡点为-20℃。

This paper calculates and analyzes the influence of different ambient temperature,outlet water temperatures and load balance points on the heating performance of low temperature air source heat pump heating system(ASHPS)in Harbin,a typical city in severe cold region in China,and its application to the city's economy as well as energy-saving and emission reduction benefits.The results show that:at the same outlet water temperature,the total input power of the ASHP at different ambient temperatures decreases with the increase of temperature,while COP of the ASHP is the opposite,during heating season,the annual operating cost of the system using floor heating is 30.74 CNY/m^2,compared with coal-fired boiler,saving standard coal 14.74 kg/m^2.Different load balancing points have a greater impact on the energy efficiency and economy of ASHPS,for Harbin,the best economic balance point is-20℃.