Experimental study on actual operation performance of air-source heat pump in green buildings

 In order to study the actual operation performance of air-source heat pump (ASHP) systems in green buildings, tests the ASHP system performance of four green building projects in Beijing, Qinhuangdao and Nantong during the heating season from 2017 to 2018.Analyses the actual operation performance and common problems of ASHP systems. The test results show that the operation performance of ASHP systems in the green buildings is generally dissatisfied, with unit COP of 1.25 to 2.80 and the system COP of 0.80 to 2.23. There are some common problems, such as false defrosting, high flow rate and small temperature difference in transmission and distribution system, frequent start and stop of group control management, excessive heat loss on the side of the unit, and so on. Points out the problems of ASHP applied to green buildings, which benefits for promoting the efficient application of ASHP.