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View Diary: For electric power generation, the end of fossil fuel is in sight (215 comments)

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  •  Intermittency (1+ / 0-)
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    gmoke

    isn't a large problem until renewables become a large percentage of electricity consumption.

    Right now they are at about 20%, and they have electricity exchanges with the Scandinavian countries which act as a big hydro 'storage' reserves.

    •  German Experiment (2+ / 0-)
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      Sandino, Calamity Jean

      The diary referred to is about a regional grid that is 100% renewable, from what I understand.  How large that region is and how many households it services I have not been able to ascertain but it is all wind, solar, and biomass with a little hydro, including some pumped hydro storage for excess wind.

      No coal, no oil, no gas, no nuclear.

      Solar is civil defense. Video of my small scale solar experiments at solarray.

      by gmoke on Mon Feb 04, 2013 at 08:31:15 PM PST

      [ Parent ]

      •  The paper linked to in the diary (1+ / 0-)
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        gmoke

        shows a proposal for a high fraction of renewables, not an operating, 100% renewable, isolated grid.

        Even with the relatively small fraction of renewable power that Germany now uses, they still rely on cross-border exchanges with France and Scandinavia to sell power when they over produce, and buy power when they need it and the paper linked in the diary assumes the same.

        It also looks like the are re-engineering houses adding PCM (phase change materials) insulation as a thermal energy heat sink to help even out demand or hot water storage tanks. That's a pretty ambitious project indeed.

        Additionally, the paper proposes distributed micro-turbines or trigeneration systems, both of which appear to be driven by natural gas fuel. An interesting read, but a far cry from a 100% renewable grid.

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