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View Diary: NREL Study: Solar Power could provide 100 Times the Amount of Current U.S. Electricity Needs! (251 comments)

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  •  There's already lots of pumped hydro (5+ / 0-)

    throughout the world.

    Especially in Norway, and even in Germany.

    The others are already happening now, as well.

    "A candle loses nothing by lighting another candle" - Mohammed Nabbous, R.I.P.

    by Lawrence on Tue Jul 31, 2012 at 10:28:26 AM PDT

    [ Parent ]

    •  Wikipedia (5+ / 0-)

      gives pumped storage a practical efficiency of 70-75%. Not bad when you consider it's "bought" at off-peak and "sold" at peak. Oddly tho, no one talks about siting. They always show a plant conveniently situated at the bottom of a large dam.

      We are, of course, ignoring political feasibility here.

      GOP: Bankers, billionaires, suckers, and dupes.

      by gzodik on Tue Jul 31, 2012 at 11:15:46 AM PDT

      [ Parent ]

      •  German Wiki states that it is around 75 to 80% (2+ / 0-)
        Recommended by:
        radical simplicity, Larsstephens

        efficient, sometimes even higher.

        It only works in areas with mountains, though(Although the Germans are exploring the potential for pumped hydro in old mine shafts, which is interesting).  Japan, for example, has excellent pumped hydro potential and, in fact, also already has lots of it.

        The proximity of the power source is not all that important, as long as it is not really far away.... the pumped storage plant basically just needs to be properly tied to the grid.

         

        "A candle loses nothing by lighting another candle" - Mohammed Nabbous, R.I.P.

        by Lawrence on Tue Jul 31, 2012 at 02:32:54 PM PDT

        [ Parent ]

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