The device below is known as WindCube, and is developed by Green Energy Technologies. It incorporates a fan and a wind concentrator system, which directs the wind at a higher speed though the fan, producing up to eight times more electricity than if it wasn’t used.
The WindCube is suited for urban usage, where wind intensity is not enough to drive a regular wind generator. WindCube can produce up to 60kW of electricity, which makes it interesting for high office buildings. Put one on top of another, they can multiply the power output without sacrificing space. You can even stick some ads, to pay for them. Sources say that the initial investment will cover itself in about 3 years.
The video below is the company’s presentation of WindCube:
It’s an interesting idea – it should be pursued seriously and developed to become cheap.