Study on Bath Water Energy Loss of Campus Dormitory Air-Source Heat-Pump Water Heater

Abstract

South dorms use widely hot water to bath, which is produced by air-source heat-pump water heater. In this study, taking dormitory air-source heat-pump water heater system as the object, the air temperature and wall temperature were tested to get the bath compartment thermal environment, and the outlet temperature and hot water temperature were recorded to obtain the bath water energy loss. The results show that the heat loss of bath hot water has a significant effect on the thermal environment of the compartment and improves the thermal comfort. The average rate of heat loss during the period when the bath hot water touching the body from the outlet to the ground is about 29%, the average heat loss rate of the hot water flowing from the ground to the floor drain is about 71%, and about 64% of the bath hot water is discharged directly into the floor drain. It has practical significance to improve the heat utilization efficiency of bath water.