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Geothermal Energy

Geothermal Energy. Responsible for information in Yellow. Geothermal Features. Boyle, Renewable Energy, 2 nd edition, 2004. 1. Geysers – Hot water and steam. Clepsydra Geyser in Yellowstone. http://en.wikipedia.org/wiki/Geyser. 2. Hot Springs – Hot water only.

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Geothermal Energy

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  1. Geothermal Energy Responsible for information in Yellow..

  2. Geothermal Features Boyle, Renewable Energy, 2nd edition, 2004

  3. 1. Geysers – Hot water and steam Clepsydra Geyser in Yellowstone http://en.wikipedia.org/wiki/Geyser

  4. 2. Hot Springs – Hot water only Hot springs in Steamboat Springs area. http://www.eia.doe.gov/cneaf/solar.renewables/page/geothermal/geothermal.html

  5. 3. Fumaroles – Steam only Clay Diablo Fumarole (CA) White Island Fumarole New Zealand http://lvo.wr.usgs.gov/cdf_main.htm http://volcano.und.edu/vwdocs/volc_images/img_white_island_fumerole.html

  6. Geothermal Energy

  7. Geothermal in Context U.S. Energy Consumption by Energy Source, 2000-2004 (Quadrillion Btu) http://energybusinessdaily.com/renewables/how-much-renewable-energy-do-we-use/ http://www.eia.doe.gov/cneaf/solar.renewables/page/geothermal/geothermal.html

  8. Advantages of Geothermal • Low CO2 production • Very cheap http://www.earthsci.org/mineral/energy/geother/geother.htm

  9. Global Geothermal Sites http://www.deutsches-museum.de/ausstell/dauer/umwelt/img/geothe.jpg

  10. Geothermal Sites in US

  11. Extracting Geothermal Energy

  12. Geothermal Energy for Electricity: How it works • Holes are drilled down to the geothermal hot region, steam or hot water comes up which is used to drive turbines. The turbines drive generators that make electricity. http://www.worldbank.org/html/fpd/energy/geothermal/technology.htm

  13. Types of Geothermal Power Plants: • Dry steam power plant: Steam comes directly from ground to drive turbines. • Single flash power plant: Hot water (360F) under pressure is pumped from ground and “flashed” to steam which drives turbines. • Binary Cycle power plant: Hot water (225-360F) is used to turn an organic liquid into a vapor which drives turbines. Boyle, Renewable Energy, 2nd edition, 2004

  14. Dry Steam Schematic Boyle, Renewable Energy, 2nd edition, 2004

  15. Single Flash Steam Schematic Boyle, Renewable Energy, 2nd edition, 2004

  16. Binary Cycle Schematic Boyle, Renewable Energy, 2nd edition, 2004

  17. Hot Dry Rock Technology • Wells drilled 2-3 miles into crust • Water pumped in, • Hot water/steam returns to surface • Steam used to generate power http://www.ees4.lanl.gov/hdr/

  18. Hot Dry Rock Technology Fenton Hill, NM plant http://www.ees4.lanl.gov/hdr/

  19. Is Geothermal Renewable? • Heat is depleted as ground cools but it is considered a renewable resource as long as the ground is not cooled too fast. http://en.wikipedia.org/wiki/Geothermal

  20. Instructions: Use a Texas geothermal map to answer the following questions: • What is the temperature of the geothermal reservoir in Collin County? • Power plant an option? • Other uses?

  21. Geothermal Heat Pump Heats and cools your house

  22. Geothermal Heat pump: How it works For heating: A substance called a refrigerant carries the heat from one area to another. When compressed, it is a high temperature, high-pressure liquid. This hot liquid heats the house. For cooling: If the refrigerant in the lines is allowed to expand, it turns into a low temperature, low pressure gas. The gas then absorbs heat from the house and transfers it down into the ground.

  23. Geothermal Heat pump diagram/Video http://www.consumerenergycenter.org/home/heating_cooling/geothermal.html http://energy.gov/energysaver/articles/geothermal-heat-pumps

  24. Geothermal Heat Pump Efficiency Heat pumps are about 45% more efficient than a traditional air conditioning/heater combination. You spend about 30%-40% less on your electric bill. (Pays itself off in about 5-10 years.)

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