Geothermal Energy for Greenhouses
Geothermal energy is heat (thermal) derived from the earth (geo). The heat flows along a geothermal gradient from the center of the earth to the surface. Most of the heat arrives at the surface of the earth at temperatures too low for much use. However, plate tectonics ensure that some of the heat is concentrated at temperatures and depths favorable for its commercial extraction (fig. 1). The water may circulate to a depth of at least 4,270 m (14,000 ft). It is then heated and moves upward along fault zones and fractures.
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Author(s): Jacky Friedman
Publication: National Nursery Proceedings - 2008
Event:
Western Forest and Conservation Nursery Association
2008 - Missoula, Montana
