Lighter than air wind energy conversion system utilizing a rotat

Prime-mover dynamo plants – Fluid-current motors – Wind

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290 44, 244 25, 416 84, F03D 900, F03D 104

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active

044503644

ABSTRACT:
A lighter-than-air (LTA) wind energy conversion system (WECS) wherein the LTA envelope carries a main rotor and electrical generator to take advantage of high wind speeds available at high altitudes. The LTA envelope is adapted to rotate with the main rotor and is tethered to a ground based mooring system designed to provide self-orientation for the LTA envelope. In a preferred embodiment, a hollow bladed main rotor is provided at the midpoint of the rotating envelope. The rotor drives an induction turbine positioned within a substantially linear duct which is, in turn, preferably located along the longitudinal axis of the rotating LTA envelope. The output of the induction turbine is coupled to an electrical generator. In another embodiment, small wind-driven generators are positioned on the tips of the blades of the main rotor. The outputs of both embodiments are transmitted to the ground via the tethering system.

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