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A heat pump in combination with heat and cold storage. A ground source heat pump (also geothermal heat pump) is a heating/cooling system for buildings that use a type of heat pump to transfer heat to or from the ground, taking advantage of the relative constancy of temperatures of the earth through the seasons.
As of 2017, the International Renewable Energy Agency estimates the Philippines' net installed geothermal energy capacity to at 1.9 gigawatts (GW)—out of the global geothermal installed capacity of 12.7 GW ranking behind the United States (2.5 GW) and ahead of Indonesia (1.5 GW). [10]
That heat can be extracted with a geothermal heat pump more efficiently than it can be generated by conventional furnaces. [10] Geothermal heat pumps are economically viable essentially anywhere in the world. In theory, geothermal energy (usually cooling) can also be extracted from existing infrastructure, such as municipal water pipes. [14]
Geothermal (ground source) heat pumps represented an estimated 30 GWth of installed capacity at the end of 2008, with other direct uses of geothermal heat (i.e., for space heating, agricultural drying and other uses) reaching an estimated 15 GWth. As of 2008, at least 76 countries use direct geothermal energy in some form. [66]
A direct exchange (DX) geothermal heat pump is a type of ground source heat pump in which refrigerant circulates through copper tubing placed in the ground unlike other ground source heat pumps where refrigerant is restricted to the heat pump itself with a secondary loop in the ground filled with a mixture of water and anti-freeze. [1]
Larry Kaelin, who's been in the geothermal installation business for 30 years and owns the local company Geothermal by Design, said the key consideration for a single-family home installation is time.
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