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Geothermal


Geothermal energy is heat energy from deep in the earth. Heat is brought to the near-surface by thermal conduction and by intrusion into the earth's crust of molten magma originating from great depth. Ground water is heated to form hydrothermal resources -- naturally occurring hot water and steam. Use of hydrothermal energy is economic today at a number of high-grade sites. Hydrothermal resources are tapped by existing well-drilling and energy-conversion technology to generate electricity or to produce hot water for direct use. Web sites about ground-source heat pump technology belong in the Heat Pumps category.


Sub-Categories:


Deep Heat Mining - Hot dry rock geothermal energy program in Switzerland. About the technology and the ongoing development program, including photos, maps, and diagrams.
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Geothermal Resource Information Clearinghouse - National Renewable Energy Laboratory provides links to geothermal energy information resources on internet.
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Virginia Tech Geothermal Data - Geothermal resource data for the southeastern U.S. through the Regional Geophysics Laboratory; summary of geothermal resources, technology, and potential of geothermal heat pumps in the southeastern U.S.
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Geo-Heat Center - Center for dissemination of geothermal information and technology transfer, by the Oregon Institute of Technology. Information on geothermal energy, its utilization, and United States's geothermal resources.
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Geothermal Explorers Ltd. - Geothermal exploration and development project: website discusses borehole heat exchangers, hydrothermal systems, and Hot-Dry-Rock system. Available in English and German languages.
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Geothermal Resources Council - Encourages worldwide research and development on geothermal energy resources and utilization. Calendar of events, workshops, membership information, publications, related links and other information.
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New Zealand Geothermal Association - Purposes include encouraging research, development and use of geothermal energy in New Zealand.
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Department of Energy - Geothermal Energy Technical Site - Maintained by Idaho National Engineering and Environmental Laboratory. Information about use of geothermal energy, U.S. laws and standards, calendar of events, FAQ, links and other.
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GEOTHERNET - Geothermal Informations for Europe - Directories of geothermal energy development and research around Europe, journals, and worldwide conferences and events. Some internet links. Includes basic information on geothermal energy technology. English or German.
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Energy Commission Geothermal Program in California - Funding opportunities, contacts, related web sites and overview of geothermal energy in California.
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Office of Scientific and Technical Information - Geothermal Energy Technology - Online document database, updated bimonthly, of hypertext bibliographic citations of current worldwide geothermal information.
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Sandia National Laboratories: Geothermal Research Department - Research in drilling and associated wellbore technologies, environmental drilling, industry partnerships, and laboratory and field-testing to evaluate new concepts.
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National Renewable Energy Laboratory Geothermal Technologies Program - Information organized by topics such as technology description, program summary, research and development projects, and publications.
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Electricity From Earth's Core - News article about a concept for a long, self-contained turbine shaft called a Power Tube that could tap subterranean heat without relying on geysers and steam vents.
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Canadian Geothermal Energy Association - Information about the Canadian Geothermal Energy Association, its members, directors and their on-going projects. Also, a description of geothermal resources in general and specific to Canada. Online bibliography of information about geothermal resources in Canada
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New Energy and Industrial Technology Development Organization - Geothermal Energy Development Department - Information about Japanese research and development activities in this area.
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International Geothermal Association - Information on geothermal energy in use around the world, world conferences on geothermal, and links to related web sites.
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CREST on Geothermal Energy - Includes an introduction to geothermal energy and its benefits, with related links.
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Department of Energy - Geothermal Technologies Program - Describes the U.S. DOE Geothermal Energy Program and provides information and news on geothermal energy.
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