Study On The Performance Of Ice Source Heat Pump-air Source Heat Pump Coupled System

The latent heat released by water freezing at 0 ℃ is 80 times of the sensible heat released by water freezing at 1 ℃ of the same mass.Making full use of the phase change latent heat of water is a new direction of energy storage development.In China,especially in the north,coal-fired heating in winter produces a lot of pollution,which affects people’s production and life.However,the low-temperature surface water in northern China can not be effectively used.Therefore,the use of controlled freezing heat release of low-temperature surface water for heating can effectively save coal consumption and reduce air pollution.Ice source heat pump system uses low-temperature surface water to control freezing and heating.However,the operating efficiency of ice source heat pump system may be reduced due to the change of surface water temperature.Therefore,in order to improve the stability of ice source heat pump system,a new type of ice source heat pump air source heat pump coupling system is proposed to meet the annual cooling and heating demand of buildings.Based on the air source heat pump module,heat pump host module and water temperature prediction module,the ice source heat pump air source heat pump coupling system simulation model is established.By changing the design load ratio of ice source heat pump and air source heat pump,the design capacity of them is adjusted,and the annual operation energy consumption and energy efficiency ratio of the coupling system under different design capacity are obtained by simulation.Finally,the operation cost and initial investment of the coupling system and the conventional system under different design capacities are calculated,and the economy and environmental protection of the two systems are compared and analyzed,and the best application scheme is obtained.The research shows that when the design load ratio of the ice source heat pump system is 0.60,the application value of the ice source heat pump air source heat pump coupling system is the highest;compared with the conventional system,the ice source heat pump air source heat pump coupling system has the advantages of low life cycle cost and less pollutant emission.The results of this paper can provide theoretical guidance and technical support for the application of ice source heat pump coupled with air source heat pump.