The shallow water source on the surface of the earth (usually within 1000 meters), such as groundwater, rivers, lakes and oceans on the surface, absorbs the considerable radiant energy of the sun entering the earth, and the temperature of the water source is generally very stable. The working principle of water source heat pump technology is to transfer low-temperature heat energy to high temperature position by inputting a small amount of high-grade energy (such as electric energy). The water body is used as the heat source for the heat pump heating in winter and the cold source for the air conditioner in summer. That is, the heat in the building is “taken out†in the summer and released into the water body. Because the water source temperature is low, the heat can be efficiently removed to reach the summer. In the winter, the purpose of cooling the building indoors is to use the water source heat pump unit to “extract†the heat from the water source and send it to the building for heating.
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