1. Technical principle of ground source heat pump
Ground source heat pump (GSHP) is an efficient energy-saving and environmental friendly air-conditioning system which can supply heat and cool by using the shallow geothermal resources. By inputting a small amount of high-grade energy (electric energy), the energy can be transferred from low-temperature heat source to high-temperature heat source.
2. heating in winter
In the heating state, the compressor in the ground source heat pump unit works on the refrigerant and reverses the direction of refrigerant flow through the four-way valve. The heat in the ground water or soil is absorbed by the underground water circulation, and the heat in the water circulation is absorbed into the refrigerant through the evaporation of the refrigerant in the refrigerant / water heat exchanger. At the same time of the refrigerant circulation, the heat carried by the refrigerant is absorbed by the air circulation through the condensation of the refrigerant in the refrigerant / air heat exchanger. In the process of heat transfer from underground to indoor, heating is carried out in the form of forced convection, natural convection or radiation.
3. cooling in summer
In the refrigeration state, the compressor in the ground source heat pump unit works on the refrigerant to make it carry out the cycle of vapor-liquid conversion. The heat carried by the indoor air circulation is absorbed into the refrigerant through the evaporation of the refrigerant in the refrigerant / air heat exchange. At the same time, the heat carried by the refrigerant is absorbed by the water circulation through the condensation of the refrigerant in the refrigerant / water heat exchange, and finally transferred to the groundwater or soil by the water circulation. In the process of indoor heat transfer to the underground, through the refrigerant air heat exchange, the room is cooled in the form of cold air below 13°C.
In short:
In winter, the heat in the soil is "taken out", and it is supplied to the room for heating after the temperature is raised; in summer, the heat in the room is "taken out" and released into the soil.