1. Joined
    26 May '08
    Moves
    2120
    13 Mar '09 20:132 edits
    http://www.newscientist.com/article/mg20126972.000-salt-solution-cheap-power-from-the-rivers-mouth.html

    This link explains how electric energy can be obtained by exploiting the chemical difference between the fresh water of a river as it enters the sea and see water.
    Perhaps about 7% of all our would energy can be obtained from this one renewable source.
  2. Subscribersonhouse
    Fast and Curious
    slatington, pa, usa
    Joined
    28 Dec '04
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    52619
    13 Mar '09 20:26
    Originally posted by Andrew Hamilton
    http://www.newscientist.com/article/mg20126972.000-salt-solution-cheap-power-from-the-rivers-mouth.html

    This link explains how electric energy can be obtained by exploiting the chemical difference between the fresh water of a river as it enters the sea and see water.
    Perhaps about 7% of all our would energy can be obtained from this one renewable source.
    I think money would be better spent on improving solar energy and battery technology like this liquid battery I mentioned. It seems to me there would have to be a hundred thousand stations to make significant energy that way, the article didn't seem to show the generation of much energy in the lab experiment, milliwatts, I think. Of course that would be scaled up but it seems to be a bit weak on the power end to justify spending billions or tens of billions on such a project. It certainly could be an adjacent generation to add to a grid but 7% of the world? I think the world is generating something like 50 terawatts so that sounds like the possiblities extend to 4 or 5 terawatts at best. That is still a lot of energy for sure. I just think solar energy could beat it. Prices going under a dollar a watt now for production costs and that's not the end of that process, it will undoubtedly get to more like 50 cents a watt for production costs in the near future. That and the Magnesium/antimony liquid battery could really set up a real grid.
  3. Germany
    Joined
    27 Oct '08
    Moves
    3081
    13 Mar '09 20:31
    I've heard of this before, not sure how commercially viable it is though.
  4. Standard memberzozozozo
    Thread Killing Chimp
    In your retina!:D
    Joined
    09 May '05
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    42859
    14 Mar '09 00:52
    Originally posted by sonhouse
    the article didn't seem to show the generation of much energy in the lab experiment, milliwatts, I think.
    hmm, the article sais something else, i dont know if its alot tho..
    "While their first membranes generated about 100 milliwatts per square metre, the latest version generates over 3 watts per square metre, close to their target of 5 watts."
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