Ground source heat pumps using the soil or groundwater as the heat source.
In the evaporator (heat exchanger) the energy transferes from the cold medium to the refrigerant. The refrigerant will then evaporate. The refrigerant is transported in the circuit by the compressor to increase the pressure and temperature of the refrigerant. In the condenser (heat exchanger) the refrigerant cools and condense. The energy is then transfered from the refrigerant to the heating system of the house, hot water system or airsystem The expansion valve regulates the mass flow of the refrigerant to maintain the pressure difference between the high pressure and the low pressure side.
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