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  1. #1
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    Geothermal could power the world

    Interesting article about geothermal.
    https://www.economist.com/news/scien...ots-head-steam

    A report prepared several years ago by scientists at Massachusetts Institute of Technology (MIT), which examined the potential for enhanced geothermal systems, reckoned $1 billion spent over 15 years on research and development could lead to 100 gigawatts of geothermal generating capacity being established by 2050 in the United States alone. Worldwide, the amount of geothermal energy that might be extracted this way could exceed 200 zettajoules (ie, over 50 million-billion kilowatt-hours). With further refinement, the MIT researchers estimated that ten times more geothermal energy could be made available—enough to meet the world’s current needs for several thousand years.

  2. #2
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    Don't you ever pay attention?
    This is exactly what destroyed Krypton.

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    Thailand Expat VocalNeal's Avatar
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    Sounds reasonable it powers the planet. Why not the population? The easy bit is that if all it means is drill a hole then we just drill next to existing coal/gas fired plants.

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    Geo thermal is one of many energy sources available which should be incorporated in all new build projects at the design stage. Along with Solar, renewables, water, wind and wave power can, in the right combinations, prevent money being wasted on greedy energy companies.
    All it needs is governments to promote, incentivise and sponsor regulations for all new build domestic and commercial property.
    Unlikely to happen because energy is such a powerful political lobbyist.
    Heart of Gold and a Knob of butter.

  5. #5
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    In Iceland geothermal accounts for 66% of their energy consumption.
    Geothermal | National Energy Authority of Iceland

    Would be a good model for other places like Anchorage AK.

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    Quote Originally Posted by VocalNeal View Post
    Sounds reasonable it powers the planet. Why not the population?
    Because it's not profitable for the respective corporations [as Chaz has touched upon] and governments to concern themselves with the well being of the commons and populations.....

  7. #7
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    There are two types of geothermal heat mining, volcanic and plutonic.

    Volcanic uses shallow drill holes near volcanic vents which will provide heat for as long as the magma chamber below is feeding heat to the surface through the vent. The geothermal in use in Iceland and in New Zealand is of this type. It is fairly reliable but the pipes have to be replaced every 5 years or so because they get clogged by precipitated metals brought up from the hot rocks and deposited inside the pipes.

    Plutonic is much deeper, up to 5km, and involves fracking the subsurface pluton to free up pore spaces allowing the water to circulate. This type of heat mining has to be moved to a new location above the pluton every 10 to 20 years after the heat is depleted. The problem with this type of heat mining is that the infrastructure to transmit the generated electricity also has to be moved along with it. There is a long standing project in central Australia that has been shown to be viable mining a pluton that is about a quarter the size of the Australian continent but it has never got off the ground because the transmission lines are all concentrated around the coastal regions and it would require a massive investment and joint agreement by the federal and state governments involved.

    http://www.geodynamics.com.au/Our-Pr...cka-Deeps.aspx

    http://reneweconomy.com.au/2013/geod...l-assets-40047
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