A novel air-source heat pump system with integrated desiccant for electric vehicles

摘要

In this study, we proposed a novel air-source heat pump system with integrated desiccant forelectric vehicles (EVs), in which the heat pump absorbs atmospheric thermal energy to heat thecabin and the desiccant dehumidifies the cabin interior to prevent windshields from fogging up. Theproposed system can reduce the amount of incoming fresh air needed and the cabin heat demand,consequently saving on the electricity consumption of batteries. The calculation results show thatcompared to conventional EV heat pumps, the cabin heat load and compressor electric power ofthe proposed system decline by 42 and 38% at an ambient air temperature of -20°C. Furthermore,the defrosting process of the proposed system saves electricity, since it utilizes the adsorption heatof the desiccant.