Floating offshore wind power generation facility
AssigneesToda Corporation, Kyoto University, Hitashi, Ltd.
InventorsIku Sato, Hitoshi Asano, Tomoaki Utsunomiya, Shigeo Yoshida
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Abstract
A floating offshore wind power generation facility includes a floating body, a mooring cable, a tower, and a windmill installed at the top of the tower, the windmill including a nacelle and a plurality of blades. The rotation axis of the windmill has a predetermined upward angle to avoid contact between the blades and the tower, and the windmill is of a downwind type in which the blades are attached to the leeward side of the nacelle and installed with the back surfaces of the blades facing windward, and the mooring point of the mooring cable to the floating body is set at a position below the surface of the sea and higher than the center of gravity of the floating body.
Claims7
A floating offshore wind power generation facility comprising
- a floating body, a mooring cable, a tower, and a windmill installed at a top of the tower, the windmill including a nacelle and a plurality of blades, wherein
- the rotation axis of the windmill has a predetermined upward angle, and the windmill is a downwind windmill, in which the blades are attached to the leeward side of the nacelle and installed with the back surfaces of the blades facing windward,
- the mooring cable is attached to the floating body at a mooring point below the surface of the sea and higher than the center of gravity of the floating body,
- the floating body has a lower concrete floating body structure formed of concrete precast cylindrical bodies which are formed into cylindrical shapes having a same cross-sectional shape along planes which are perpendicular to an axial direction of the concrete floating body structure, and which are stacked in a direction of height, and each cylindrical body is connected along the height direction with a steel material, and wherein an upper steel floating body structure is provided on an upper part of the lower concrete floating body structure and wherein
- each of the concrete precast cylindrical bodies is composed of a plurality of split cylindrical bodies joined to each other along a circumferential direction of the concrete precast cylindrical bodies,
- each concrete precast cylindrical body comprises outer cables under tension wound around an outer circumference of the respective concrete precast cylindrical body, and
- wherein the cables have first ends and second ends, and the first ends are anchored to a first anchoring device on the respective concrete precast cylindrical body and the second ends are anchored to a second anchoring device on the respective concrete precast cylindrical body, wherein the first and second anchoring devices face each other along a diametrical direction of the respective concrete precast cylindrical body, and wherein each outer cable is positioned around a first circumferential side or a second circumferential side of the respective concrete precast cylindrical body and wherein a number of outer cables positioned around the first circumferential side of the respective concrete precast cylindrical body are the same as a number of outer cables positioned around the second circumferential side of the respective concrete precast cylindrical body.
Dependencies are inferred from the claim text.