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Geothermal Energy Harnessing the Energy of the Earth
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What is Geothermal Energy? Geothermal energy is “heat derived from the earth” – Geothermal Resources Council Thermal energy is found in rocks and fluid in the earth’s crust Thermal energy exists at various temperatures and depths around the globe
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Geothermal Energy is: Available continuously Renewable Clean Local
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American Geothermal Resources Western states have particularly strong geothermal sites
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Northwest Infrastructure
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How much power do we need? Northwest uses about 18,000 MW Energy Information Administration, DOE, 2003 – Oregon, Washington, Idaho, Montana Exponential growth at 1.8%/year: –For 2025: 18,000*(1.018)^22 = 26,650 MW –For 2050: 18,000*(1.018)^47 = 41,630 MW Geothermal energy can reduce these numbers
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Geothermal Heat Pumps Reduce heating/cooling energy needs by up to 45% 30% of electricity is used for heating, cooling, and ventilation Heat pumps could reduce electricity needs by 13.5%: 2025: 23,050 MW 2050: 36,010 MW Ductwork Heat Exchanger Warm liquid Fan Buried, closed- loop
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Geothermal Savings: Energy and Dollars Pay less for heating and cooling State governments offer rebates and low-interest loans for installation (35% rebate in Oregon)
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Does Geothermal Add Up? Need: -2025: 23,050 MW -2050: 36,010 MW Geothermal potential*: Oregon: 2200 MW Idaho: 540 MW Montana: 400 MW Washington: 300 MW Northwest: 3,440 MW *Sources: Oregon and Idaho: Testimony of U.S. Geologic Survey Washington: Prof. Gordon Bloomquist; Montana: Dr. John Lund (OIT)
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Does Geothermal Add Up? Iceland Deep Drilling Project: “power output from supercritical wells could be increased by a factor of 10” in relation to a normal well. 34,400 MW (96% of estimated 2050 demand!)
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Geothermal energy has been used since 1904 to generate electricity Many countries around the world are developing geothermal energy
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Looking East Iceland uses geothermal energy to inexpensively provide 17% of its electricity and heat 87% of the nation’s homes
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Closer to Home Geysers provide California with 750 megawatts of electricity. Satisfies 60% of the electricity demands from the Golden Gate Bridge to the Oregon border.
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Oregon Oregon has great potential to develop geothermal energy Oregon is already using geothermal energy to heat buildings
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“This 30-MW, air-cooled geothermal power plant on the Big Island of Hawaii (Puna) blends in well with the natural landscape.” - U.S. Department of Energy
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Clean
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