what is geothermal energy? why is geothermal important? · why isn't all subsurface water hot?...
TRANSCRIPT
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What is geothermal energy?
Why is geothermal important?
Where do we find it?
How do we use it?
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Why is geothermal important?
● Clean energy● Renewable● Cheap
http://geothermal.marin.org/GEOpresentation/images/img037.jpg
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What is clean energy?
http://arthurpage.files.wordpress.com/2009/02/coal-power-plant.jpg
http://paradiseprofits.files.wordpress.com/2009/07/geothermal-power-plant-i01.jpg
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Where do we find geothermal resources?
http://www.latimes.com/media/graphic/2008-11/43174037.gif
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http://smu.edu/geothermal/heatflow/geothermal_all_us_clipped_150dpi_pagesize_legend.gif
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Why is it hot?
http://www.geothermal-energy.org/pliki/Image/geo/What_is_geothermal_en_html_m79881583.jpg
http://oceansjsu.com/images/exp5_interior_earth.gif
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Why isn't all subsurface water hot?
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Why isn't all subsurface water hot?
● Ground water: Water that exists beneath the earth's surface in underground streams and aquifers
● Aquifer: an area that contains large amounts of water under the surface of the earth
● Geothermal water: water heated by the natural heat inside the Earth
● Geothermal reservoir: a large volume of underground hot water and steam in porous and fractured hot rock. Geothermal reservoirs are sometimes covered by a layer of impermeable rock.
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Where does Boise's geothermal come from?
http://www.geothermal-energy.org/pliki/Image/geo/What_is_geothermal_en_html_4983ad05.jpg
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Geothermal recharge
http://www.volker-goebel.biz/Geothermal_energy_plant_Swizerland_egs.jpg
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Efficiency
http://www.geothermal-energy.org/pliki/Image/geo/What_is_geothermal_en_html_m22e51466.jpg
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Direct use geothermal
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How do we extract the energy?