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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.
This technology makes ground source heating economically viable in any geographical location. In 2004, an estimated million ground-source heat pumps with a total capacity of 15 GW extracted 88 PJ of heat energy for space heating. Global ground-source heat pump capacity is growing by 10% annually. [1]
The 4,000-square-foot (370 m 2) home cost $125 per square foot (or 370 m 2 at $1,351/m 2), similar to the cost of a traditional new home. Active solar heating uses pumps to move air or a liquid from the solar collector into the building or storage area.
Geothermal units are being built at Louisville's Norton Commons. A series of loops are used -- digging down around 350 feet -- for an alternative to traditional HVAC systems.
The Sonoma Calpine 3 geothermal power station of The Geysers. Geothermal energy in the United States was first used for electric power production in 1960. The Geysers in Sonoma and Lake counties, California was developed into what is now the largest geothermal steam electrical plant in the world, at 1,517 megawatts. Other geothermal steam ...
The first geothermal area to be exploited for commercial electricity generation was The Geysers, a complex of 22 geothermal power stations located in Sonoma and Lake counties of California, which was commissioned in September 1960. [1]
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