Application of heat pump coupled aquifer thermal energy storage technology

The effect of heat pump coupled aquifer thermal energy storage is examined in this paper,with which a project is used for heating and air-condition for a hotel in Tianjin.The data of the thermal energy storage system are obtained and analyzed.The results indicate that in winter,heat is abstracted from pumping well water and cold water is injected to the injection-well through heat pump,through which cold water can be stored and used in summer.On the contrary,in summer cold water is abstracted from pumping well water and heat is injected to the injection-well through heat pump,through which heat is stored and used for the heat pump in winter.Thermal energy contained in the shallow earth is used so that fossil energy can be saved.The temperature of the underground will fall if the heating load is heavier than the cold load and the temperature of the underground will rise if the heating load is lower than the cold load.In order to protect the balance of the aquifer environment,the system should be run in the case that the heat load is equal to the cold load.