A heat pump can be used to heat a house in winter and to cool it in summer HEAT PUMP OPERATION-HEATING MODE Outdoor coil Reversing valve or coil.* Fan Fan Compressor Expansion valve High-pressure liquid HEAT PUMP OPERATION-COOLING MODE Low-pressure liquid-vapor Outdoor coil Reversing valve Low-pressure vapor High-pressure vapor Indoor coil Fan Fan (heat pumps:air-source, water-source,ground-source...) Compressor Expansion valve 上降文通大学 May9,2019 17 SHANGHAI JIAO TONG UNIVERSITYMay 9, 2019 17 A heat pump can be used to heat a house in winter and to cool it in summer (heat pumps: air-source, water-source, ground-source…)