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View Diary: "Climate change: it's even worse than we think." A sobering reality for Thanksgiving ... (114 comments)

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  •  Made up ... (0+ / 0-)

    illustrative ... and ignoring that wind often blows when the sun isn't shining ... and that with a decent enough grid, one can provide very high predictability with renewable (intermittent) resources spread across a wide-enough geographic expanse.

    Blogging regularly at Get Energy Smart NOW! for a sustainable energy future.

    by A Siegel on Fri Nov 23, 2012 at 07:14:37 AM PST

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    •  Are there any *real* figures on the (0+ / 0-)

      availability of wind and solar power?  I thought that I once saw that wind turbines averaged about 2/3rds of their "nominal" rating.  If that's true, it would require overbuilding wind turbines by only 1.5 times, not 4 times.  And that's without allowing for solar fill-in.  

      Renewable energy brings national global security.     

      by Calamity Jean on Sat Nov 24, 2012 at 10:38:50 AM PST

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      •  Actually ... (2+ / 0-)
        Recommended by:
        JeffW, Calamity Jean

        A reasonable planning figure for US land-based wind installations, at this time, is 40% capacity. (Has been getting better with each year -- there are some facilities going in with plans/expectations of topping 50%. Improvements are combination of better technology and better planning/siting.) Off-shore wind is better.  E.g., using "overbuilding', plan about 2.5 to 1.  

        Think solar about 15-20% and you are in the zone of reasonable.

        Blogging regularly at Get Energy Smart NOW! for a sustainable energy future.

        by A Siegel on Sat Nov 24, 2012 at 08:42:41 PM PST

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