This is an alternative to wind powered electric generators. Instead of having large propellers the wind is collected by a funnel that compresses the air to increase the velocity. This can turn a 5 MPH wind into a more powerful force capable turning a larger generator. The funnel could sit atop a building and not be as conspicuous as a propeller. It would sit on a rotating platform that could turn at least 180 degrees. The turbine is basically a fan that is turned by the wind instead of creating it. The horizontal rotation is converted to vertical and passed into the building where the generator is located. Some sort of mechanical governor would be needed to limit the RPM of the shaft.

This is a couple older drawings I did.