WO2024039343A1 - A stable and economical submerged floating platform for offshore wind turbines - Google Patents

A stable and economical submerged floating platform for offshore wind turbines Download PDF

Info

Publication number
WO2024039343A1
WO2024039343A1 PCT/TR2023/050809 TR2023050809W WO2024039343A1 WO 2024039343 A1 WO2024039343 A1 WO 2024039343A1 TR 2023050809 W TR2023050809 W TR 2023050809W WO 2024039343 A1 WO2024039343 A1 WO 2024039343A1
Authority
WO
WIPO (PCT)
Prior art keywords
weight
platform
chains
floating platform
floaters
Prior art date
Application number
PCT/TR2023/050809
Other languages
French (fr)
Inventor
Bergüzar ÖZBAHÇECİ
Ünver ÖZKOL
Yüksel ALKAREM
Original Assignee
İzmi̇r Yüksek Teknoloji̇ Ensti̇tüsü Rektörlüğü
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from TR2022/012963 external-priority patent/TR2022012963A1/en
Application filed by İzmi̇r Yüksek Teknoloji̇ Ensti̇tüsü Rektörlüğü filed Critical İzmi̇r Yüksek Teknoloji̇ Ensti̇tüsü Rektörlüğü
Publication of WO2024039343A1 publication Critical patent/WO2024039343A1/en

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING 
    • B63B21/00—Tying-up; Shifting, towing, or pushing equipment; Anchoring
    • B63B21/50—Anchoring arrangements or methods for special vessels, e.g. for floating drilling platforms or dredgers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING 
    • B63B1/00—Hydrodynamic or hydrostatic features of hulls or of hydrofoils
    • B63B1/02—Hydrodynamic or hydrostatic features of hulls or of hydrofoils deriving lift mainly from water displacement
    • B63B1/10—Hydrodynamic or hydrostatic features of hulls or of hydrofoils deriving lift mainly from water displacement with multiple hulls
    • B63B1/12—Hydrodynamic or hydrostatic features of hulls or of hydrofoils deriving lift mainly from water displacement with multiple hulls the hulls being interconnected rigidly
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02B—HYDRAULIC ENGINEERING
    • E02B17/00—Artificial islands mounted on piles or like supports, e.g. platforms on raisable legs or offshore constructions; Construction methods therefor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING 
    • B63B1/00—Hydrodynamic or hydrostatic features of hulls or of hydrofoils
    • B63B1/02—Hydrodynamic or hydrostatic features of hulls or of hydrofoils deriving lift mainly from water displacement
    • B63B1/10—Hydrodynamic or hydrostatic features of hulls or of hydrofoils deriving lift mainly from water displacement with multiple hulls
    • B63B1/12—Hydrodynamic or hydrostatic features of hulls or of hydrofoils deriving lift mainly from water displacement with multiple hulls the hulls being interconnected rigidly
    • B63B2001/128—Hydrodynamic or hydrostatic features of hulls or of hydrofoils deriving lift mainly from water displacement with multiple hulls the hulls being interconnected rigidly comprising underwater connectors between the hulls
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING 
    • B63B21/00—Tying-up; Shifting, towing, or pushing equipment; Anchoring
    • B63B21/20—Adaptations of chains, ropes, hawsers, or the like, or of parts thereof
    • B63B2021/206—Weights attached to mooring lines or chains, or the like; Arrangements thereof
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING 
    • B63B35/00—Vessels or similar floating structures specially adapted for specific purposes and not otherwise provided for
    • B63B35/44—Floating buildings, stores, drilling platforms, or workshops, e.g. carrying water-oil separating devices
    • B63B2035/4433—Floating structures carrying electric power plants
    • B63B2035/446—Floating structures carrying electric power plants for converting wind energy into electric energy

Definitions

  • the present invention relates to floating offshore wind turbines to be used in offshore wind energy and marine renewable energy sectors.
  • It relates to a submerged floating platform for offshore wind turbines designed to decrease the cost of the platform and to decrease the oscillations due to forces and rotations under various wind and wave conditions in all 6 degrees of freedom (DoF).
  • Wind turbines installed on the sea can generate more power than their land-based counterparts because high wind speeds can be reached at lower altitudes. However, in order to feel this high wind speed, it is necessary to move at least a few kilometers away from the coastline. In regions of the world where water depths exceed 50 meters in a short distance, fixing the turbine towers to the seabed is not economically feasible. Therefore, installing offshore wind turbines by placing them on floating platforms is an important option.
  • FOWT Floating Offshore Wind Turbines
  • Semi-submerged platforms are stabilized by buoyancy and the large platform area on the water's surface. They usually consist of 3 semi-submerged cylinder columns. Liu et al. (2016) summarized the developments in the semi-submersible platform and reviewed different designs working on the principle of the semi-submersible platform.
  • the stability of the spar-type platform is provided by the deep water cut (draft) and by pulling the center of gravity down with the help of ballast (concrete or water) placed at the bottom of the structure. Improvements in the spar are made by connecting the mooring chains in the form of a delta, reducing the draft, or attaching swinging wings to the bottom.
  • the tension-legged platform works on the principle of balancing the load with the mooring chains.
  • the turbine tower is fixed to the platform under the water, while the platform is anchored to the bottom with taut steel cables.
  • the platform can be crossshaped or rectangular or in the form of columns similar to a semi-submersible as in Gicon- TLP.
  • the targeted platform should be resistant to rotations like a semi-submersible, up and down displacement like a spar, and not have a large water surface area like a barge-type platform. For this reason, three floats are used in the newly developed platform to compensate for rotational moments, but the floats were designed as fully submerged. Ballast weights and weight disks were used to reduce up and down displacement, but they were connected to the tower and floaters with chains. Using chains to connect the ballast weight to the platform aims to decrease the platform's cost.
  • the Chinese patent document CN214401876 (U), which was encountered in the literature search, describes a semi-submersible platform for floating wind turbines. Unlike the platform subject to the description, the mentioned platform is semi-submerged. It also needs a design to balance the wave forces coming from three axes. For this reason, it is possible to encounter balance problems, especially excessive up and down movement. The rotations and displacements caused by wind and wave forces cannot be counterweighted sufficiently in the known floating submerged platforms. There is no design for balancing these forces in six degrees of freedom.
  • the present invention relates to a floating submerged platform that fulfills the abovementioned requirements, eliminates disadvantages, and brings additional advantages.
  • the invention aims to provide a new floating platform that eliminates the stability problems encountered in offshore wind turbines caused by wind and wave-induced triaxial forces and rotational moments.
  • Another object of the invention is to provide a fully submerged floating platform to move the floating platform away from the water surface where wave forces are most effective.
  • Another aim of the invention is to provide a new floating submerged platform that, thanks to its weight disks on different axes, compensates for the various axial forces experienced by the wind turbine.
  • Another object of the invention is to provide a new floating submerged platform with improved balancing performance by connecting the weight disks with chains that allow freedom of movement as a counterweight instead of rigid rods.
  • the inventive design incorporates the best features of the three leading existing platforms. These are:
  • ballast weight reduces pitch motion, which is especially important in generating stable energy.
  • the stabilizer weight was not placed in a long draft of the platform as in the SPAR.
  • the ballast weight was suspended from the turbine tower with chains. Therefore, a much more economical platform was obtained.
  • Figure 1 shows schematically in perspective view a detail of the present invention which is a submerged floating platform for offshore wind turbines according to an embodiment.
  • the numbered parts in Fig.1 are explained below: Explanations:
  • the floating platform which is the subject of the present invention is fully submerged, including the part of the legs connecting the floaters and the tower.
  • the wind turbine is placed on the turbine tower (1 ) in the platform's uppermost part.
  • Three submerged floaters (3) are connected to the tower through three inclined legs (2). The number of floaters and the angle of the legs can vary. However, the best stability performance is achieved with the design seen in Figure 1.
  • Floaters (3) are connected to a ballast weight (4) through a bundle of chains (5) in the platform.
  • weight discs (6) are generally positioned at the bottom of the floaters or the ballast weight in the existing platform technologies and called heave disks, in the present innovative platform, they are used both on the inclined chains (5) between the floaters (3) and the balancing weight (4) and the vertical chains (5) between the turbine tower (1) and the balancing weight (4). While the traditional heave disks can decrease the motion only on the vertical axis (heave motion), in this invention, they can balance the forces and rotations in 6 DoF since the weight discs (6) are positioned at different angles.
  • ballast weight is used in the existing floating platform technologies.
  • the ballast weight is placed at the bottom of the extended cylinder platform structure. It may also be suspended by rigid legs.
  • the ballast weight (4) is connected to the tower(1 ) and floaters(3) through a bundle of chains(5).
  • At least one weight disc (6) is used on the chain (5) between the turbine tower (1) and the ballast weight (4).
  • Weight disks (6) are positioned on the chain (5) to be perpendicular to the chain.
  • various types of material can be used in the floaters and the chains.
  • At least one weight disc (6) is used on the chain (5) between the floaters (3) and the ballast weight (4).
  • Weight disks (6) are positioned on the chain (5) to be perpendicular to the chain.
  • various types of material can be used in the chains.
  • weight disk (6) at the bottom of the ballast weight (4).
  • the weight disk is similar to the heave disk and is used to decrease the motion in the Z direction.
  • the platform has weight disks positioned at different angles that counterweight the forces in different directions.

Abstract

A floating platform for offshore wind turbines comprises fully submerged floaters, a ballast weight, weight disks, chains, and legs. Vertical and inclined chains are used to connect ballast weight to floaters and the tower. Therefore, it decreases the cost of the platform. Weight disks are used at the bottom of the ballast weight and on the chains to reduce the oscillations due to wind and wave-induced forces and rotations in all 6 degrees of freedom.

Description

A STABLE AND ECONOMICAL SUBMERGED FLOATING PLATFORM FOR OFFSHORE WIND TURBINES
Technologic Area:
The present invention relates to floating offshore wind turbines to be used in offshore wind energy and marine renewable energy sectors.
It relates to a submerged floating platform for offshore wind turbines designed to decrease the cost of the platform and to decrease the oscillations due to forces and rotations under various wind and wave conditions in all 6 degrees of freedom (DoF).
BACKGROUND ART:
Wind turbines installed on the sea can generate more power than their land-based counterparts because high wind speeds can be reached at lower altitudes. However, in order to feel this high wind speed, it is necessary to move at least a few kilometers away from the coastline. In regions of the world where water depths exceed 50 meters in a short distance, fixing the turbine towers to the seabed is not economically feasible. Therefore, installing offshore wind turbines by placing them on floating platforms is an important option.
Placing vertical or horizontal axis wind turbines on a floating platform and connecting this platform to the bottom with chains or ropes makes it possible to obtain a stable and economical wind power plant against factors such as wind, waves, and currents in the open sea. These turbines are called Floating Offshore Wind Turbines (FOWT). FOWTs consist of a turbine, a floating platform, and connections to the bottom. The most crucial part in terms of stability is the floating platforms. Floating platforms are connected to the seabed at several points with keel (catenary) or taut anchor ropes or chains. Although different platforms have been developed for floating wind turbines in the last 10-15 years, some typical platform geometries have come to the fore. These are the semi-submerged platform, the spar platform, and the tension-legged platform (TLP).
Semi-submerged platforms are stabilized by buoyancy and the large platform area on the water's surface. They usually consist of 3 semi-submerged cylinder columns. Liu et al. (2016) summarized the developments in the semi-submersible platform and reviewed different designs working on the principle of the semi-submersible platform.
The stability of the spar-type platform is provided by the deep water cut (draft) and by pulling the center of gravity down with the help of ballast (concrete or water) placed at the bottom of the structure. Improvements in the spar are made by connecting the mooring chains in the form of a delta, reducing the draft, or attaching swinging wings to the bottom.
The tension-legged platform (TLP) works on the principle of balancing the load with the mooring chains. The turbine tower is fixed to the platform under the water, while the platform is anchored to the bottom with taut steel cables. The platform can be crossshaped or rectangular or in the form of columns similar to a semi-submersible as in Gicon- TLP.
Gouppe et al. (2014) conducted an experimental study and compared semi-submerged, spar, and tension-legged platforms (TLP). They found that the spar has less longitudinal translation (surge) motion than the others, while the tension-legged type is advantageous in pitch motion. Bagbanci et al. (2015) compared spar and semi-submerged types with the help of numerical modeling. The study results found that longitudinal translation and heave movements are more common in semi-submerged platforms. The barge-type platform, which works on the principle of buoyancy like a semi-submersible, is the most straightforward design in terms of production. Still, since the platform is entirely on the sea surface where the wave is most effective, it is very much affected by wave forces, creating problems in stability and stable energy production (Jonkman and Matha, 2011 ). TLP appears stable in comparative studies (Oguz et al. 2018, Nihei et al. 2014). However, its attachment to the bottom with a large number of taut steel cables creates reservations regarding both economy and application in the deep sea (Jonkman and Matha, 2011 ). Therefore, each of these typical platforms has advantages and disadvantages, and efforts are ongoing to achieve a more stable and economical floating platform design for the commercialization and widespread deployment of floating wind turbines. The targeted platform should be resistant to rotations like a semi-submersible, up and down displacement like a spar, and not have a large water surface area like a barge-type platform. For this reason, three floats are used in the newly developed platform to compensate for rotational moments, but the floats were designed as fully submerged. Ballast weights and weight disks were used to reduce up and down displacement, but they were connected to the tower and floaters with chains. Using chains to connect the ballast weight to the platform aims to decrease the platform's cost.
The Chinese patent document CN214356565 (U) encountered in the literature research mentions a completely submerged platform. In the Chinese patent document, it is seen that three disks are used in the lower section. Since these disks are in a horizontal position, they allow only uniaxial balancing. In addition, rigid connecting rods are used between the weights instead of chains. This prevents the platform from remaining balanced due to wave-induced movements from different axes.
The PCT patent document numbered WO2021211121 (A1 ), which was encountered in the literature search, describes a floating submerged platform that is entirely underwater. No disk is used in the mentioned floating submerged platform. Only weights are used. These weights do not provide balancing performance in three different axes. For this reason, there is a high probability of encountering balance problems on the platform.
The Chinese patent document CN214401876 (U), which was encountered in the literature search, describes a semi-submersible platform for floating wind turbines. Unlike the platform subject to the description, the mentioned platform is semi-submerged. It also needs a design to balance the wave forces coming from three axes. For this reason, it is possible to encounter balance problems, especially excessive up and down movement. The rotations and displacements caused by wind and wave forces cannot be counterweighted sufficiently in the known floating submerged platforms. There is no design for balancing these forces in six degrees of freedom.
As a result, there is a need for a new floating platform where the known state of the technique is overcome, and its disadvantages are eliminated.
SUMMARY:
The present invention relates to a floating submerged platform that fulfills the abovementioned requirements, eliminates disadvantages, and brings additional advantages.
Based on the state of the art, the invention aims to provide a new floating platform that eliminates the stability problems encountered in offshore wind turbines caused by wind and wave-induced triaxial forces and rotational moments.
Another object of the invention is to provide a fully submerged floating platform to move the floating platform away from the water surface where wave forces are most effective.
Another aim of the invention is to provide a new floating submerged platform that, thanks to its weight disks on different axes, compensates for the various axial forces experienced by the wind turbine.
Another object of the invention is to provide a new floating submerged platform with improved balancing performance by connecting the weight disks with chains that allow freedom of movement as a counterweight instead of rigid rods.
The inventive design incorporates the best features of the three leading existing platforms. These are:
• Since the platform is submerged, the effects ofwave forces are kept to a minimum. • A ballast weight reduces pitch motion, which is especially important in generating stable energy. However, the stabilizer weight was not placed in a long draft of the platform as in the SPAR. The ballast weight was suspended from the turbine tower with chains. Therefore, a much more economical platform was obtained.
• As a result of the spatial spreading of the platform with three floaters, the pitch and roll oscillations are again reduced.
• To reduce the heave (in the direction of gravity), the weight disks used at the bottom of the semi-submersible columns in the existing technologies are suspended on chains in the invention.
• In the comparison studies using the numerical model, under the same conditions, the oscillations of the invented platform are less, and the cost is lower than the existing platforms like semi-submersible and spar.
BRIEF DESCRIPTION OF THE DRAWINGS:
The invention will be described with reference to the accompanying figures so that the features of the invention will be more clearly understood. However, this is not intended to limit the invention to these particular embodiments. On the contrary, it is also intended to cover all alternatives, modifications, and equivalents of the invention which may be included within the field defined by the appended claims. It is to be understood that the details shown are shown for the sole purpose of describing preferred embodiments of the present invention and are presented to provide the most useful and readily understood description of both the embodiment of the methods and the rules and conceptual features of the invention. In these drawings:
Figure 1 shows schematically in perspective view a detail of the present invention which is a submerged floating platform for offshore wind turbines according to an embodiment. The numbered parts in Fig.1 are explained below: Explanations:
• Turbine tower
• Legs to connect floaters to the tower
• Floater
• Ballast weight
• Chains
• weight disks
Detailed description of embodiments:
In this detailed description, the inventive floating submerged platform is explained only for a better understanding of the subject matter, with examples that will not have any limiting effect. The description describes a floating submerged platform with a design realized to reduce the up-and-down oscillation motion and rotational moments caused by sea waves and wind and increase its stability capability.
The floating platform, which is the subject of the present invention is fully submerged, including the part of the legs connecting the floaters and the tower. The wind turbine is placed on the turbine tower (1 ) in the platform's uppermost part. Three submerged floaters (3) are connected to the tower through three inclined legs (2). The number of floaters and the angle of the legs can vary. However, the best stability performance is achieved with the design seen in Figure 1. Floaters (3) are connected to a ballast weight (4) through a bundle of chains (5) in the platform.
While the weight discs (6) are generally positioned at the bottom of the floaters or the ballast weight in the existing platform technologies and called heave disks, in the present innovative platform, they are used both on the inclined chains (5) between the floaters (3) and the balancing weight (4) and the vertical chains (5) between the turbine tower (1) and the balancing weight (4). While the traditional heave disks can decrease the motion only on the vertical axis (heave motion), in this invention, they can balance the forces and rotations in 6 DoF since the weight discs (6) are positioned at different angles.
A ballast weight is used in the existing floating platform technologies. For example, in a spar platform, the ballast weight is placed at the bottom of the extended cylinder platform structure. It may also be suspended by rigid legs. In the present invented platform, the ballast weight (4) is connected to the tower(1 ) and floaters(3) through a bundle of chains(5).
In the present invention, at least one weight disc (6) is used on the chain (5) between the turbine tower (1) and the ballast weight (4). Weight disks (6) are positioned on the chain (5) to be perpendicular to the chain. However, it is also possible to place weight discs (6) on the chain at different angles changing between 0-90°. Different angles of weight disks may counterweight the forces in different directions. In addition, it is also possible to change the number of chains in a bundle and the diameter of the chains. Moreover, various types of material can be used in the floaters and the chains.
Similarly, in the prevent invention, at least one weight disc (6) is used on the chain (5) between the floaters (3) and the ballast weight (4). Weight disks (6) are positioned on the chain (5) to be perpendicular to the chain. However, it is also possible to place weight discs (6) on the chain at different angles changing between 0-90°. Different angles of weight disks may counterweight the forces in different directions. In addition, it is also possible to change the number of chains in a bundle and the diameter of the chains. Moreover, various types of material can be used in the chains.
Furthermore, in the present invention, there is also one weight disk (6) at the bottom of the ballast weight (4). The weight disk is similar to the heave disk and is used to decrease the motion in the Z direction.
Therefore, the platform has weight disks positioned at different angles that counterweight the forces in different directions.

Claims

1- A submerged floating platform for offshore wind turbines comprising:
Legs (2) in different numbers and angles floaters (3) in various numbers and materials a ballast weight (4) connected to the tower and the floaters by chains chains (5) in different numbers, inclined or vertical weight disks (6) positioned at different angles developed to decrease the wind and wave-induced motions and rotations in 6 DoF and increase the stability
2- The submerged floating platform, according to claim 1 , wherein the ballast weight (4) is connected to the turbine tower (1) by vertical chains (5), allowing the free motion of the ballast weight.
3- The submerged floating platform, according to claim 2, wherein there is at least one weight disk (6) positioned perpendicular to the chain (5) between the tower(1 ) and the ballast weight (4).
4- The submerged floating platform, according to claim 2, wherein there is at least one weight disk (6) positioned at an angle of 0-90° to the chain (5) between the tower(1) and the ballast weight(4).
5- The submerged floating platform, according to claim 1 , wherein the ballast weight (4) is connected to the floaters (3) by inclined chains (5), allowing the free motion of the ballast weight. 6- The submerged floating platform, according to claim 5, wherein there is at least one weight disk (6) positioned perpendicular to the chain (5) between the tower (1 ) and the floaters (3). 7- The submerged floating platform, according to claim 5, wherein there is at least one weight disk (6) positioned at an angle of 0-90° to the chain (5) between the tower(1) and the floaters(3).
8- The submerged floating platform, according to claim 1 , wherein at least one weight disk (6) is positioned at the bottom of the ballast weight (4).
PCT/TR2023/050809 2022-08-16 2023-08-15 A stable and economical submerged floating platform for offshore wind turbines WO2024039343A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
TR2022012963 2022-08-16
TR2022/012963 TR2022012963A1 (en) 2022-08-16 AN ECONOMIC FLOATING SUBMERSIBLE PLATFORM THAT REDUCES THE OSCILLATIONS OF OFFSHORE WIND TURBINES AGAINST WIND AND WAVE LOADS

Publications (1)

Publication Number Publication Date
WO2024039343A1 true WO2024039343A1 (en) 2024-02-22

Family

ID=89942151

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/TR2023/050809 WO2024039343A1 (en) 2022-08-16 2023-08-15 A stable and economical submerged floating platform for offshore wind turbines

Country Status (1)

Country Link
WO (1) WO2024039343A1 (en)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20160341182A1 (en) * 2014-02-06 2016-11-24 University Of Maine System Board Of Trustees Method Of Assembling A Floating Wind Turbine Platform
EP3170730A1 (en) * 2014-07-17 2017-05-24 Modec, Inc. Method for constructing offshore structure and offshore structure
WO2018018103A1 (en) * 2016-07-26 2018-02-01 Gaia Importação, Exportação E Serviços Ltda. Offshore deployable wind turbine system and method with a gravity base
EP4201798A1 (en) * 2021-12-24 2023-06-28 TotalEnergies OneTech Mooring device for an offshore wind turbine

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20160341182A1 (en) * 2014-02-06 2016-11-24 University Of Maine System Board Of Trustees Method Of Assembling A Floating Wind Turbine Platform
EP3170730A1 (en) * 2014-07-17 2017-05-24 Modec, Inc. Method for constructing offshore structure and offshore structure
WO2018018103A1 (en) * 2016-07-26 2018-02-01 Gaia Importação, Exportação E Serviços Ltda. Offshore deployable wind turbine system and method with a gravity base
EP4201798A1 (en) * 2021-12-24 2023-06-28 TotalEnergies OneTech Mooring device for an offshore wind turbine

Similar Documents

Publication Publication Date Title
JP7014498B2 (en) Floating wind turbine assemblies, as well as methods for mooring such floating wind turbine assemblies
US8668452B2 (en) Floating device for production of energy from water currents
US7686543B2 (en) System for mounting equipment and structures offshore
JP6607867B2 (en) Floatable support structure for offshore wind turbines or other devices
US20070266704A1 (en) Wave energy converter (WEC) with heave plates
KR20160023660A (en) Submersible active support structure for turbine towers and substations or similar elements, in offshore facilities
JP6505840B2 (en) Floating platform for utilizing wind energy
KR101786063B1 (en) Support structure for an offshore wind turbine
US20140042749A1 (en) Ocean floor mounting of wave energy converters
CN108473185B (en) Low-motion semi-submersible type well platform
CN112648149B (en) Marine formula fan basis and offshore wind turbine that floats
EP1339600B1 (en) Vessel comprising transverse skirts
JP2014510665A (en) Buoyancy device with special mooring system
TWI689446B (en) Floating support structure with horizontal section varying with depth
CN114408110A (en) Strong wind resistant fully-submersible wind power platform
KR20140120154A (en) Truss Type Lower Structure of Floating Offshore Wind Turbine
WO2024039343A1 (en) A stable and economical submerged floating platform for offshore wind turbines
JP2023546750A (en) Minimizing offshore wind turbine movement
GB2471863A (en) Wave powered generator responsive to wave impact
WO2021256939A1 (en) Floating windmill construction
NL2010709C2 (en) Floating wind turbine.
TR2022012963A1 (en) AN ECONOMIC FLOATING SUBMERSIBLE PLATFORM THAT REDUCES THE OSCILLATIONS OF OFFSHORE WIND TURBINES AGAINST WIND AND WAVE LOADS
JP2024505494A (en) wind power plant
WO2023135166A1 (en) Hull structure for a semi-submersible wind power turbine platform
CN117561198A (en) Anchor system and method for installing a floating platform using the same

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 23855254

Country of ref document: EP

Kind code of ref document: A1