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Geothermal Energy Resources

Geothermal Energy Resources. San Jose State University FX Rongère March 2009. Geothermal Energy Resource. Huge resource: At 10 km under the ground the resource are 13 M Quads Equivalent of 130,000 year of USA energy overall consumption 100 GWe possible in the USA by 2050

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Geothermal Energy Resources

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  1. Geothermal EnergyResources San Jose State University FX Rongère March 2009

  2. Geothermal Energy Resource • Huge resource: • At 10 km under the ground the resource are 13 M Quads • Equivalent of 130,000 year of USA energy overall consumption • 100 GWe possible in the USA by 2050 • In California, Geothermal Energy is big: 2,068 MW installed in California in 2006 compared to 2,313 MW for the USA Source: EIA.gov Source: CEC-300-2007-007 2006 NET SYSTEM POWER REPORT

  3. Types of Geothermal Energy • 3 types of Geothermal Energy • Power Generation (>3km - >150oC) • District Heating (500m - <100oC) • Geothermal Heat Pumps (100m - <20oC) Source: http://www.geothermal.ch/eng/vision.html

  4. Geothermal Resource • Heat comes from the core of the earth, the natural earth radioactivity, and chemical reactions http://www.worldbank.org/html/fpd/energy/geothermal/technology.htm

  5. Estimation of the heat flux • Conduction through the lithosphere k Thermal conductivity of the crust (2 W.m.K-1) TS Temperature at the surface of the crust (20oC) n Normal to the surface TM Temperature of the surface of the mantel ( 930oC) dcrust Depth of the crust is about 30 km A Area (1 m2)

  6. Capture the energy deep in the crust • Water flow allows much higher flux • Drill a well deep enough to get the required temperature Assuming uniform crust depth

  7. Plate Tectonics • Best resources are at the boundaries of main plates

  8. Current Drilling Cost Source:The Future of Geothermal Energy 2006

  9. Geothermal Resources USA

  10. Geothermal Resources USA

  11. Geothermal Resources USA

  12. Geothermal Resources USA

  13. California Geothermal Resources Geothermal Power Plants

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