What is geothermal energy?

Why is geothermal important?

Where do we find it?

How do we use it?

Why is geothermal important?

● Clean energy● Renewable● Cheap

http://geothermal.marin.org/GEOpresentation/images/img037.jpg

What is clean energy?

http://arthurpage.files.wordpress.com/2009/02/coal-power-plant.jpg

http://paradiseprofits.files.wordpress.com/2009/07/geothermal-power-plant-i01.jpg

Where do we find geothermal resources?

http://www.latimes.com/media/graphic/2008-11/43174037.gif

http://smu.edu/geothermal/heatflow/geothermal_all_us_clipped_150dpi_pagesize_legend.gif

Why is it hot?

http://www.geothermal-energy.org/pliki/Image/geo/What_is_geothermal_en_html_m79881583.jpg

http://oceansjsu.com/images/exp5_interior_earth.gif

Why isn't all subsurface water hot?

Why isn't all subsurface water hot?

● Ground water: Water that exists beneath the earth's surface in underground streams and aquifers

● Aquifer: an area that contains large amounts of water under the surface of the earth

● Geothermal water: water heated by the natural heat inside the Earth

● Geothermal reservoir: a large volume of underground hot water and steam in porous and fractured hot rock. Geothermal reservoirs are sometimes covered by a layer of impermeable rock.

Where does Boise's geothermal come from?

http://www.geothermal-energy.org/pliki/Image/geo/What_is_geothermal_en_html_4983ad05.jpg

Geothermal recharge

http://www.volker-goebel.biz/Geothermal_energy_plant_Swizerland_egs.jpg

Efficiency

http://www.geothermal-energy.org/pliki/Image/geo/What_is_geothermal_en_html_m22e51466.jpg

Direct use geothermal

How do we extract the energy?