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Sommat to make PJC cream his environmentally friendly globally warmed jeans
Well I am 'sceptical' (in the original meaning of the word) that you can double the efficiency of a turbine by putting a rim round it, but we'll see when they publish.
Intermittency adds an insignificant amount to the cost of wind, when used in a properly integrated grid. The wind is always blowing (or the sun shining, or the tide turning, or the river flowing or the geothermal, erm geo-thermalling) somewhere. Why Wind Intermittency is NOT a Big Deal | CleanTechnica
My subconscious is annoying. It's got a mind of its own.
I can't find a reliable or scholarly source on this, apart from the Japanese site. Maybe too early. Seems a bit hard to believe, and if the efficiency were significantly greater as claimed, wind turbines would likely need to be spaced out more.
Please do your homework .... intermittency was put to bed half a decade ago
Most comprehensive assessment on intermittency ever undertaken finds reports suggesting renewable energy is costly or limited by intermittency are out of step with majority of expert analysis
The UK Energy Research Centre (UKERC) today launches a definitive report on the costs and impacts of intermittent energy supplied by renewable sources, such as wind. Some commentators have suggested that renewable energy is made much more costly, or is drastically limited by intermittency.
However, the report finds that these views are out of step with the vast majority of international expert analysis. Intermittency need not present a significant obstacle to the development of renewable sources.
My subconscious is annoying. It's got a mind of its own.
Thanks TW. Looks really promising.... if it will scale up ...
I had a quick look and got a bit lost in all the various designs in a quick 1st pass, but it appears that the shroud they use is 1.1 times the blade length (or 1.2 times the blade diameter), which is what I was interested in. Power is proportional to swept area (and wind speed cubed) so I'd expect a 21% increase in power with that extra length, if it were all rotor, but they claim about 2x the power, and even more with a baffle of type C (which I assume isn't too long), but I got bored at that point. Have to wait and see what others make of it in the field, and as you say to see if it will scale up. They also cite another design from an earlier group that claimed 2x the power IIRC. Interesting.
Last edited by TimberWolf; 9 September 2011, 21:11.
Reason: Mishtakes
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