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Feb22-12, 03:01 AM
P: 4,078
Quote Quote by Blast12345 View Post
Let us say, for example, that we have a windmill with a 3 meter diameter. The windmill would only capture the energy from the wind within the area [approx. 7 square meters] of its rotation (give or take), correct?

So, if you were to build a cone (or a pyramidal funnel) with an area of 28 square meters, wouldn't the energy from the entire area (the 28 square meters) be exerted on the windmill?
You don't have to build a funnel much larger in area than the turbine. You just need the right shape to increase the pressure difference.

It acts similar to the fan shrouding below, but it's not quite the same thing: