On 27/01/2013 19:26, The Natural Philosopher wrote:
On 27/01/13 18:20, harry wrote:
http://en.wikipedia.org/wiki/Windbelt
I feel sure he'll love this one.

" One prototype has powered two LEDs, a radio, and a clock (separately)
using wind generated from a household fan"

right so push a couple of hundred watts into the fan, and get out 120mW?


YOu really are clueles harruy.

The Betz limit governs how much energy you can get OUT of the air, and
the swept area of the device used to get it times the wind speed cubed
determines the power IN it.

No amount of technical chicanery and snake oil will get more

Add to which that most of the problems with wind power result from its
intermittency, and its low power density. Not something a better turbine
can do much about.

--
Cheers,

John.

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