Southern
Research Station

• Authors: Friedman, Jacky
• Publication Year: 2009
• Publication Series: Proceedings (P)
• Source: In: Dumroese, R. K.; Riley, L. E., tech. coords. National Proceedings: Forest and Conservation Nursery Associations-2008. Proc. RMRS-P-58. Fort Collins, CO: U.S. Department of Agriculture, Forest Service, Rocky Mountain Research Station. p. 17-19

Abstract

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.

• Citation: Friedman, Jacky 2009. Geothermal energy for greenhouses. In: Dumroese, R. K.; Riley, L. E., tech. coords. National Proceedings: Forest and Conservation Nursery Associations-2008. Proc. RMRS-P-58. Fort Collins, CO: U.S. Department of Agriculture, Forest Service, Rocky Mountain Research Station. p. 17-19
• Keywords: alternative energy, heating systems
• Posted Date: May 19, 2009
• Modified Date: April 1, 1980

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