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View Diary: Solar Photovoltaic Generating Capacity Averaging 65% Compound Annual Growth Rate for Last 5 Years (161 comments)

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  •  What states does this include? (2+ / 0-)
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    JeffW, G2geek
    Find me a solution for the band of territory that comprises the northern most 25% of the continental US from coast to coast.  
    PV panels work better in cooler temperatures, so even the northern part of the "Lower 48" should get some solar electricity.  And most of that area is decently windy, too.  

    Actually, I think most of the problem will be in the Southeast; it's got lots of sun but is a "wind desert", so what will they do overnight?  Unless the Old Confederacy imports wind power from Texas, they may be burning coal for night power long after the rest of the nation is all renewables.  Solar thermal may cover some nighttime.  

    Renewable energy brings national security.      -6.25, -6.05

    by Calamity Jean on Wed Jul 06, 2011 at 10:45:35 AM PDT

    [ Parent ]

    •  that's where any kind of storage is important. (0+ / 0-)

      Molten salt, pumped hydro, and the new design for gravitational storage using 3,000 - 6,000' deep holes that are used as hydraulic cylinders filled with water and with huge heavy "pistons" as the actual energy storage medium (gravity-driven, and the water is the working fluid that turns turbines).

      All of that and more needs to be developed and built and then standardized.

      The storage problem is the same whether for sun or wind: someone needs to calculate the intermittency time factors (e.g. overnight, X number of cloudy days in a row, etc.) and design the storage capacity to meet it.  

      The engineering on all of this is straightforward; the thing that is holding us back is lack of money which really means lack of will.  

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