EXPERIMENTAL INVESTIGATION OF A HIGH-TEMPERATURE AIR-SOURCE HEAT PUMP WATER HEATER

摘要

This work experimentally investigates the impact of several operating parameters on the heating performance of a high-temperature air-source heat pump water heater.The operating parameters considered in the study are the air inlet temperature,hot water inlet temperature,flow rate of hot water,while the heating performance studied here include the heating capacity of the condenser,power consumption of the compressor,and COP of the heat pump.The effect of temperature lift of heat pump on COP is also discussed.The results show that the temperature lift of heat pump could be served as an indicator for the assessment of COP.The COP will decrease by 15.8％ for each 10K increment of temperature lift for the moderate-temperature air-source heat pump.The COP is 2.1,when the temperature lift of the heat pump is 75.1℃ and the supply temperature of hot water is 85℃.