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GEOTHERMAL ENERGY
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WHAT DOES THE WORD "GEOTHERMAL" MEAN?
WHAT IS GEOTHERMAL ENERGY? Energy that can be extracted from the heat in the
earth Arizona Conditions are most favorable for
geothermal activity where the earth's tectonic plates collide and one slides beneath another.
The best example of these hot regions is the Pacific Ring of Fire
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MAP OF THE WORLD INDICATING THE RING OF FIRE
PacificRing of fire
Arizona
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HOW DOES GEOTHERMAL HEAT GET UP TO EARTH'S SURFACE?
Conduction Heat from the Earth’s interior flows outward. It is
transferred to the outer layer of rock or the crust.
Convection In some regions, the mantle beneath the crust may
be hot enough to partly melt and create magma. Magma rising upward out of the mantle can bring intense shallow Magma or very hot rock heat into the crust
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HOW HAVE PEOPLE USED GEOTHERMALENERGY IN THE PAST?
Bathing:Ancient civilizations
Medical Therapy:Early Romans
Cooking:Native Americans and others
Heating: Early Romans in Pompeii
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HOW DO WE USE GEOTHERMAL ENERGY TODAY?
Domestic Use:Space Heating/Cooling
Water Heating Aquaculture use:
Fish, Shrimp and Alligators
Drying of fruits / vegetables Industrial Use:
Dying of cloth, washing wool, piping under
sidewalks to keep from freezing, manufacturing paper
Electricity Generation
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STATISTIC OF ELECTRICITY GENERATED IN THE U.S.
FROM GEOTHERMAL ENERGY
2700 MW Today , 0.4% of all electrical generation Estimated additional capacity available 5,000 – 18,000 MW
Geothermal-Wind-Solar - 1%
Coal – 53%
Nuclear – 21%
Natural Gas – 15%
Hydro – 7%
Oil – 3%
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HOW IS ELECTRICITY GENERATED USING GEOTHERMAL ENERGY?
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SOME OF THE ADVANTAGES OF USINGGEOTHERMAL ENERGY TO GENERATE
ELECTRICITY
Clean:No emissions, safe to use
Reliable:Continuous, reliable base-load power
Sustainable / Reusable:Water can be recycled back into the earth and reused.
No other fuel mixture required to create electricity. Land Conservative:
No major land requirements. Can be integrated into the local area with no adverse effects
Flexible / Modular:Geothermal power plants can have modular designs, with additional units installed in increments when needed to fit growing demand for electricity
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ADDITIONAL SOURCES OF INFORMATION
http://www.eere.energy.gov/geothermal/ http://www.energyquest.ca.gov/index.html http://www.azgs.az.gov/Summer2001.htm http://www.energy.gov/engine/content.do http://geothermal.marin.org/hotsites.html http://www.geothermal.marin.org/ http://lsa.colorado.edu/summarystreet/texts/geothermal.htm
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THE END