jverne
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until we master fusion.
i'm talking about geothermal energy.
http://www.ecogeek.org/content/view/2055/76/
http://en.wikipedia.org/wiki/Geothermal_power
it's probably the only real and abundant alternative source that could power us in the near future.
edit: read the "potential" section of wiki quite interesting
i'm talking about geothermal energy.
http://www.ecogeek.org/content/view/2055/76/
http://en.wikipedia.org/wiki/Geothermal_power
it's probably the only real and abundant alternative source that could power us in the near future.
edit: read the "potential" section of wiki quite interesting
The MIT report calculated the world's total EGS resources to be over 13,000 ZJ. Of these, over 200 ZJ would be extractable, with the potential to increase this to over 2,000 ZJ with technology improvements - sufficient to provide all the world's present energy needs for several millennia.[11]
The key characteristic of an EGS (also called a Hot Dry Rock system), is that it reaches at least 10 km down into hard rock. At a typical site two holes would be bored and the deep rock between them fractured. Water would be pumped down one and steam would come up the other. The MIT report estimated that there was enough energy in hard rocks 10 km below the United States to supply all the world's current needs for 30,000 years. [11]
Drilling at this depth is now possible in the petroleum industry, albeit expensive. (Exxon announced an 11 km hole at the Chayvo field, Sakhalin. Lloyds List 1/5/07 p 6) Wells drilled to depths greater than 4000 metres generally incur drilling costs in the tens of millions of dollars. The technological challenges are to drill wide bores at low cost and to break rock over larger volumes. Apart from the energy used to make the bores, the process releases no greenhouse gases.