Floating wind turbine systems and methods
A system that comprises a hull assembly that includes a plurality of outer columns including a first outer column, a second outer column and a third outer column, the plurality of outer columns surrounding and spaced about a central axis Y.
1 . A system comprising:
a tower that includes a turbine with a nacelle, hub and a plurality of blades extending from the hub, the tower having a central axis Y;
a hull assembly that includes:
a central column coupled to a base of the tower at a top of the central column, the central column having a central column axis coincident with the central axis Y,
a plurality of outer columns, including no more than three outer columns, and including a first outer column, a second outer column and a third outer column, the plurality of outer columns surrounding and equally spaced about the central column with respective adjacent outer columns being 120° from each other about the central axis Y and defining three planes of symmetry that are coincident with the central axis Y;
a plurality of upper truss members, including at least a first upper truss member, a second upper truss member and a third upper truss member that respectively couple the first, second and third outer columns with the central column and that extend from respective top ends of the first, second and third outer columns;
a plurality of lower truss members including at least a first lower truss member, a second lower truss member and a third lower truss member that respectively couple the first, second and third outer columns with the central column and that extend from respective bottom ends of the first, second and third outer columns;
a plurality of cross-beams, the plurality of cross-beams including at least a first cross-beam, a second cross-beam and a third cross-beam, that respectively couple the first, second and third outer columns with the central column and that extend diagonally between respective upper and lower truss members, wherein a first end of each cross-beam is slidably coupled to the central column and a second end of each cross-beam is rotatably coupled to a respective outer column;
wherein the hull assembly is configured to assume an extended configuration where the first, second and third upper truss members extend between the central column and a respective outer column in a first common plane; and the first, second and third lower truss members extend between the central column and a respective outer column in a second common plane that is parallel to the first common plane and perpendicular to the central axis Y; and the three outer columns have respective outer column central axes that are parallel to each other; and
wherein the hull assembly is configured to assume a collapsed configuration from the extended configuration, where one or two of the three outer columns are configured to fold upward toward and proximate to the tower; and one or two other columns of the three outer columns are configured to fold downward below and proximate to a base of the central column.
2 . The system of claim 1 , wherein the central column and the three outer columns are configured to be filled with water that acts as ballast for the hull assembly.
3 . The system of claim 1 , wherein the system is configured to assume an erected configuration floating in a body of water, on a surface of the body of water, where the hull assembly is in the extended configuration and the tower extends vertically above the surface of the body of water with the three outer columns and the central column partially submerged in the body of water, with the system floating in the body of water at least based on buoyancy of the three outer columns and the central column.
4 . The system of claim 3 , wherein the system in the erected configuration would violate a port draft allowance of 8-12 m and an air draft allowance of 50-70 m, but the system in the collapsed, horizontal configuration would not violate the port draft allowance of 8-12 m nor the port air draft allowance of 50-70 m.
5 . The system of claim 1 , wherein the hull assembly assumes the extended configuration by:
changing buoyancy of a first of the one or more outer columns, thereby causing the cross-beams coupled thereto to translate along tracks of the central column to transition the first of the one or more outer columns to its position in the extended configuration;
locking the first of the one or more columns to its position in the extended configuration;
changing buoyancy of a second of the one or more outer columns, thereby causing the cross-beams coupled thereto to translate along tracks of the central column to transition the second of the one or more outer columns to its position in the extended configuration; and
locking the second of the one or more columns to its position in the extended configuration.
6 . A system comprising:
a hull assembly that includes:
a central column with a central axis Y,
a plurality of outer columns including a first outer column, a second outer column and a third outer column, the plurality of outer columns surrounding and equally spaced about the central column about the central axis Y;
a plurality of upper truss members, including at least a first upper truss member, a second upper truss member and a third upper truss member that respectively couple the first, second and third outer columns with the central column;
a plurality of lower truss members including at least a first lower truss member, a second lower truss member and a third lower truss member that respectively couple the first, second and third outer columns with the central column; and
a plurality of cross-beams, including at least a first cross-beam, a second cross-beam and a third cross-beam, that respectively couple and extend diagonally between the first, second and third outer columns and the central column, wherein a first end of each cross-beam is slidably coupled to the central column and a second end of each cross-beam is rotatably coupled to a respective outer column.
7 . The system of claim 6 , further comprising a tower extending from the hull assembly that includes a turbine.
8 . The system of claim 6 , wherein the hull assembly includes no more than three outer columns.
9 . The system of claim 6 , wherein the hull assembly is configured to assume an extended configuration where the first, second and third upper truss members extend between the central column and a respective outer column in a first common plane; and the first, second and third lower truss members extend between the central column and a respective outer column in a second common plane that is parallel to the first common plane and perpendicular to the central axis Y.
10 . The system of claim 6 , wherein the hull assembly is configured to assume a collapsed configuration where one or two of the plurality of outer columns are configured to fold upward and one or two other columns of the plurality of outer columns are configured to fold downward.
11 . A hull assembly comprising:
a central column extending along a central axis Y;
a plurality of outer columns including a first outer column, a second outer column and a third outer column, the plurality of outer columns surrounding and spaced about a central axis Y;
a plurality of truss members that respectively couple the first, second and third outer columns with the central column, each of the truss members rotatably coupled to the central column; and
a plurality of cross-beams that respectively couple the first, second and third outer columns with the central column, wherein a first end of each cross-beam is slidably coupled to the central column and a second end of each cross-beam is rotatably coupled to a respective outer column.
12 . The system of claim 11 , wherein
the plurality of truss members includes at least a first upper truss member, a second upper truss member and a third upper truss member that respectively couple the first, second and third outer columns with the central column.
13 . The system of claim 11 ,
wherein the plurality of truss members includes at least a first lower truss member, a second lower truss member and a third lower truss member that respectively couple the first, second and third outer columns with the central column.
14 . The system of claim 11 ,
wherein the plurality of cross-beams includes at least a first cross-beam, a second cross-beam and a third cross-beam, that respectively couple and extend diagonally between the first, second and third outer columns and the central column.
15 . The system of claim 11 , further comprising a tower extending from the hull assembly.
16 . The system of claim 11 , wherein the hull assembly includes no more than three outer columns.
17 . The system of claim 11 , wherein the plurality of outer columns are configured to be filled with water that acts as ballast for the hull assembly.
18 . The system of claim 11 , wherein the hull assembly is configured to assume a collapsed configuration where one or two of the plurality of outer columns are configured to fold upward and one or two other columns of the plurality of outer columns are configured to fold downward.
19 . The system of claim 11 , wherein the hull assembly is configured to assume an extended configuration where a first subset of the plurality of truss members extend between the central column and a respective outer column in a first common plane; and a second subset of the plurality of truss members extend between the central column and a respective outer column in a second common plane that is parallel to the first common plane and perpendicular to the central axis Y.
20 . The system of claim 19 , wherein the system is configured to assume an erected configuration floating in a body of water, on a surface of the body of water, where the hull assembly is in the extended configuration and a tower coupled to the hull assembly extends vertically above the surface of the body of water with the plurality of outer columns at least partially submerged in the body of water, with the system floating in the body of water at least based on buoyancy of the plurality of outer columns.
21 . The system of claim 20 , wherein the system in the erected configuration would violate a port draft allowance of 50-70 m, but the system in a collapsed configuration would not violate the port draft allowance of 50-70 m.