Research of Aquifer Thermal Energy Storage System Integrated Underground Water Heat Pump

Abstract

Effect of aquifer thermal energy storage (ATES) of underground water heat pump system was researched. In winter, the heat pump extracted heat from underground water for space heating, at the same time, cold water was re-injected to underground and stored up around in-rejecting well, which would be used as the cool source of heat pump in summer. Similarly, in summer, underground water absorbed discharged heat of heat pump, and then temperature was raised and was re-injected to underground, which was stored up around the other in-rejecting well and would be supplied higher temperature water for the heat pump in winter. In this paper, the temperature and flux of production and re-injection wells had been tested in one year. Based on this datum, the ration of heat and cool energy storage was calculated; it indicated that the thermal and cool energy storage efficacy of the ATES system was 10.97% and 7.98% respectively.