|Graphic interpretation of Betz' law|
If you take all the energy out of wind you cant get any energy out of the next bit, because in no time, the whole place is gummed up with stationary wind. So we find ourselves forced to slightly less greed, and only take a percentage.
We are forced to take less that 59%. Albert Betz did some apparently good work in finding this theoretical maximum limit for us. I say apparently, because aside from a stack of numbers and letters, his equations include things like triangles and a very great many dots where previously I thought such dots never went. In short, to me they mean nothing. Besides, my keyboard doesn't have a triangle key, so we are just going to have to take his word for it. Anyway, in reality we cant get 59% , because of all kinds of inefficiencies, and my frustrating lack of an infinitely thin rotor in my pile of junk. The best part is we really don't need 100% efficiency because there is plenty more wind where that came from, and the stuff is free.
Hmm, perhaps Nobel simply didn't like triangles.