Underwater ducted turbine
First Claim
1. A hydro turbine generator for generating electrical power from water flow, said apparatus comprising a hub substantially parallel to a water flow and at least one generator and characterized by:
- (a) at least one rotor disk comprising a plurality of hydrofoil blades rotatably attached to said hub and extending radially from said hub;
(b) a generally cylindrical housing defining a duct, said duct being proximate to the tips of said blades and attached to said hub by a plurality of curved guide vanes extending radially between said hub and said duct, such that said curved guide vanes are operable to change the direction of said water flow.
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Accused Products
Abstract
An apparatus is disclosed for a turbine for generating electrical power from water or air flow comprising at least one rotor disk having a plurality of hydrofoil blades, a guide vanes, a cylindrical housing, and a generator means. A rim generator comprising a magnet race rotor rim and fixed stator coils in the housing is used. The apparatus is fitted with a screen to stop the ingress of debris and marine life, and a skirt augmenter device to reduce the Betz effect. The apparatus is preferably for sub-sea deployment and driven by tidal currents, but may be powered by river current or wave driven air or by wind. The apparatus may be deployed on at least one telescoping pole, tethered to the sea-bed and kept buoyant by buoyant concrete in the housing, inserted in a dam, under a barge or in a tidal power array.
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Citations
39 Claims
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1. A hydro turbine generator for generating electrical power from water flow, said apparatus comprising a hub substantially parallel to a water flow and at least one generator and characterized by:
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(a) at least one rotor disk comprising a plurality of hydrofoil blades rotatably attached to said hub and extending radially from said hub; (b) a generally cylindrical housing defining a duct, said duct being proximate to the tips of said blades and attached to said hub by a plurality of curved guide vanes extending radially between said hub and said duct, such that said curved guide vanes are operable to change the direction of said water flow. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39)
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Specification