The water source heat pump unit is a low temperature and low level thermal resource formed by absorbing solar energy and geothermal energy from shallow water sources on the earth's surface. By using the principle of heat pump, a technology of transferring low-level heat to high level heat energy is realized by input of a small number of high electric energy. The basic principle of water source heat pump is to transfer heat from buildings to water sources in summer. Because of low water temperature, they can efficiently take heat, while in winter, heat is extracted from water.
When the water source heat pump unit is in the refrigeration mode, the refrigerant gas from high temperature and high pressure comes out of the compressor and enters the condenser. The refrigerant releases heat to the cooling water, forming high temperature and high pressure liquid, and makes the cooling water and water temperature rise. The refrigerant is expanded into low temperature and low pressure liquid through expansion valve, and enters the evaporator, absorbs the heat of frozen water, evaporates into low pressure steam, and reduces the temperature of frozen water. The low pressure refrigerant steam enters the compressor and compresses into the high temperature and high pressure gas, so it circulates in the evaporator to get the frozen water.
In the heating mode, the refrigerant gas from high temperature and high pressure comes out of the compressor and enters the condenser. The refrigerant releases heat into the heating water and then is cooled to high pressure liquid, and the water temperature of the heating water rises. The refrigerant is expanded into low temperature and low pressure liquid through expansion valve, and enters the evaporator, absorbs the heat from the low temperature heat source, evaporates into low pressure steam, and reduces the temperature and water temperature of the low temperature heat source.
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