Lecture 13 - Geothermal Energy

Lecture 13 - Geothermal Energy - 1 1 Lecture 13 Geothermal...

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Unformatted text preview: 1 1 Lecture 13 Geothermal Energy ECE 4364/5374G Alternate Energy Systems George Hagerman, Research Associate Center for Energy and the Global Environment Virginia Tech - Advanced Research Institute 2 Goals for Lecture 13 Nature and distribution of geothermal energy resource Plate tectonic theory of Earth ` s crust formation and evolution Heat flow and temperature gradients in the upper crust Geothermal energy conversion for electric power generation Dry steam Lardello, Italy and The Geysers, California Flashed steam China Lake, California Binary cycle Steamboat Springs, Nevada and Fang, Thailand Hybrid or combined cycle Upper Mahiao, Philippines, and Puna, Hawaii Hot dry rock European Union project at Soulz, France Geothermal energy conversion for direct heating Ground source heat pumps Depend on heating of ground by sun, not by heat flow from Earth ` s core ECE 4364/5374G-13 2 3 Earth ` s Planetary Structure Temperature of liquid outer core ranges from 4,000 to 5,000 C. Most of the Earth ` s core heat production is thought to be due to radio-isotope decay. ECE 4364/5374G-13 4 Plate Tectonic Boundary Types ECE 4364/5374G-13 3 5 Global Plate Tectonic Boundaries See short animations at www.ucmp.berkeley.edu/geology/anim1.html and www.earthbyte.org/Resources/Movies/pangaea.html ECE 4364/5374G-13 6 Earth ` s Heat Flow ECE 4364/5374G-13 4 7 Temperature Gradients in Earth ` s Crust = Low Heat Flow = High Heat Flow VT-measured gradients in Virginia are at http://rglsun1.geol.vt.edu/va_wells.html ECE 4364/5374G-13 Geothermal Reservoir Formation ECE 4364/5374G-13 8 5...
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Lecture 13 - Geothermal Energy - 1 1 Lecture 13 Geothermal...

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