If i understand correctly, this means that electric power is directly related to air flow = air speed. So if, you put a relevant rotor in the vacuum cleaner, you get 2000W. Should not be too difficult.

No you won't. With a pressure gradient on the order of tenths of atmosphere per meter, you get a considerable loss from friction. You'd be lucky to recover 200 W from a setup like that.

Hard to believe. Can a rotor and couple of gears rise price from 3e/MW to 80e/MW?

And a tower. And grid connection. And transformers. And installation. And output governors. And you're converting a pressure gradient into electricity, which is a lot harder than converting electricity into a pressure gradient.

- Jake

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