How Does A Geothermal System Work?

How does a geothermal system work? The efficiency of the geothermal power is that it uses the stable temperature in the earth as a heat source, so the refrigerant is exchanging heat with water that is circulating through the ground.

A heat pump works on the same principal as the refrigerator. So, if you can picture a refrigerator continually chilling down your ice box. It can work also on reverse, so I can continually pump heat into a space. There is a refrigerant gas that's continually changing state; evaporating and condensing. When it changes state, that's how it gains its efficiency. A lot of heat is taken up or given off when the refrigerant changes state from a gas to a liquid and back to a gas.

The efficiency of the geothermal power is that it uses the stable temperature in the earth as a heat source, so the refrigerant is exchanging heat with water that is circulating through the ground. Heat pump efficiency depends on what that source temperature is. It just so happens that the earth is at a stable constant temperature, and that's what makes the geothermal heat pump more efficient than an air source heat pump.

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