WO2023140736A1 - Construction d'éolienne et son procédé d'installation - Google Patents

Construction d'éolienne et son procédé d'installation Download PDF

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Publication number
WO2023140736A1
WO2023140736A1 PCT/NO2022/050021 NO2022050021W WO2023140736A1 WO 2023140736 A1 WO2023140736 A1 WO 2023140736A1 NO 2022050021 W NO2022050021 W NO 2022050021W WO 2023140736 A1 WO2023140736 A1 WO 2023140736A1
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WO
WIPO (PCT)
Prior art keywords
foundation
windmill
floating
arm
windmill construction
Prior art date
Application number
PCT/NO2022/050021
Other languages
English (en)
Inventor
Bjarte Nordvik
Original Assignee
Bjarte Nordvik
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
Application filed by Bjarte Nordvik filed Critical Bjarte Nordvik
Priority to PCT/NO2022/050021 priority Critical patent/WO2023140736A1/fr
Publication of WO2023140736A1 publication Critical patent/WO2023140736A1/fr

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
    • F03D—WIND MOTORS
    • F03D13/00—Assembly, mounting or commissioning of wind motors; Arrangements specially adapted for transporting wind motor components
    • F03D13/20—Arrangements for mounting or supporting wind motors; Masts or towers for wind motors
    • F03D13/25—Arrangements for mounting or supporting wind motors; Masts or towers for wind motors specially adapted for offshore installation
    • F03D13/256—Arrangements for mounting or supporting wind motors; Masts or towers for wind motors specially adapted for offshore installation on a floating support, i.e. floating wind motors
    • 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
    • B63B1/107—Semi-submersibles; Small waterline area multiple hull vessels and the like, e.g. SWATH
    • 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
    • B63B21/507—Anchoring arrangements or methods for special vessels, e.g. for floating drilling platforms or dredgers with mooring turrets
    • 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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00—Energy generation through renewable energy sources
    • Y02E10/70—Wind energy
    • Y02E10/72—Wind turbines with rotation axis in wind direction
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00—Energy generation through renewable energy sources
    • Y02E10/70—Wind energy
    • Y02E10/727—Offshore wind turbines

Definitions

  • the present invention relates to a windmill construction comprising a floating foundation which is partially submerged in a body of water, where the partially submerged foundation supports at least one tower equipped with a windmill, and where the floating foundation is rotatably anchored about a bottom-fixed foundation that extends up from a seabed.
  • the invention also relates to a method for installation of a floating part of a windmill construction to a bottom-fixed foundation which extends up through a water surface.
  • the description relates to an invention in the technical field of offshore wind energy.
  • a technical solution for stabilization and anchoring for floating elements that can rotate about the anchoring point is described.
  • Offshore wind is a particularly interesting resource related to renewable energy exploration. There is a great potential in utilizing ocean areas and the wind over such areas to extract electrical energy.
  • One challenge related to the extraction of energy from offshore wind is the cost.
  • For offshore wind to be a competitive energy source it is crucial that costs related to production, installation and operation and maintenance of offshore wind turbines are reduced. To achieve this goal, it is important to develop new, cost-effective technology.
  • floating foundations which are anchored to the seabed by means of anchor lines with associated anchoring to the seabed.
  • anchor lines with associated anchoring to the seabed.
  • the main part of said devices is anchored in a way which means that they cannot rotate but use a windmill which can rotate relative to the tower.
  • FIG. 1 Another type of floating platforms is designed in a way that allows them to rotate about the anchorage point, further referred to as (rotating platforms).
  • This type of device will be able to allow more of a windmill as it adjusts itself to the wind, which means that the windmills do not come in the shadow of each other.
  • Anchoring of floating devices today consists of several anchor lines which connect the floating device to respective anchors which lie in a pattern where they typically have approximately the same angle in relation to each other and spread over a relatively large area. Another type is the tension leg, where the anchor lines go relatively straight down and hold the platform at a certain depth. Described solutions apply to both rotating and non-rotating platforms, and are solutions normally found for offshore rigs used in the oil and gas industry.
  • the present invention relates to anchoring of rotating platforms, and a known anchoring type for this type of device is described in SE-1850590-9, where the rotating platform uses a typical tension leg configuration.
  • DE 29908897 U1 which describes a floating, partially submerged foundation where at least one tower with a windmill is arranged, and where the floating foundation is rotatably anchored to a bottom-fixed foundation.
  • WO 2019102434 A1 , DE 20209000 U1 , DE 102009040648 A1 and DE 201 1 1441 U1 all show floating wind power plants that are rotatably anchored to a bottom-fixed foundation.
  • the rigid installation can typically, but not be limited to, be of the type Monopile, Tri-pod, Jacket, suction caisson and gravity base or a combination of these types, where an alternative would be to attach a typical monopile design, in the form of a tube to the top of a Jacket.
  • This document describes a technical solution that has advantages over the prior art, in that floating, rotating platforms can be anchored cheaper and more efficiently in shallower water. Then, by using rigid structures that extend from a seabed. And it is also possible to use existing bottom-fixed foundations on existing offshore wind parks as attachments for floating platforms. And in that way, the individual windmill installations could be upgraded from solid to liquid and typically increase the power from 2-3 MW to 20-30 MW.
  • a windmill construction comprising a floating foundation which is partially submerged in a body of water, where the partially submerged foundation supports at least one tower equipped with a windmill, in which the floating foundation is rotatably anchored about a bottom-fixed foundation which extends up from a seabed, where the floating foundation comprises an elongated, floating element which is rotatably mounted to said bottom-fixed foundation in a turret mooring.
  • the bottom-fixed foundation is preferably an existing foundation for a bottom-fixed offshore installation. Alternatively, there can be a new installation.
  • the turret mooring preferably provides a freely rotatably anchorage about the bottom-fixed foundation.
  • the turret mooring can comprise a turntable arrangement which connects the bottom-fixed foundation to a mounting arm extending from the floating foundation.
  • the turntable arrangement can comprise a pivot pin provided with a head and which is adapted to be inserted into an open cavity in an opposite fastening part.
  • the pivot pin can be mounted in an electric swivel, said swivel is set up for the transmission of electric power between a first part of a power line and a second part of the power line.
  • the pivot pin can comprise a through-running boring for the first part of the power line.
  • the floating foundation can further comprise one or more projecting stabilizer arms, where said stabilizer arm(s) extend out from the foundation in an area above a water surface to the body of water.
  • the floating foundation can support a first and a second tower which, relative to each other, are placed side by side and inclined, where a first stabilizer arm of the first tower extends in the opposite direction relative to a second stabilizer arm of the second tower.
  • Each stabilizer arm can include an upper arm and a lower arm.
  • the lower arm can be connected to the upper arm in a joint or hinge connection, or the lower arm can be freely suspended from the upper arm.
  • first and the second stabilizer arms can be attached to a shoulder shaft which runs between the first and second towers.
  • each stabilizer arm can comprise a lower brake collar, such as a projecting circular disc provided on the outer and lower ends of the stabilizer arm.
  • the bottom-fixed foundation can comprise a rotatable, fastening ring and the floating foundation can comprise an underlying block disc, where a cable runs from the fastening ring, over the block disc and to a weight which hangs in the body of water.
  • the lower part of the tower can comprise a wave-breaking and arcuate construction.
  • An integrated control system can be used to regulate and limit the thrust forces generated by the turbines, so that the forces do not exceed the design criteria of the windmill construction.
  • a turntable arrangement can be mounted between an upper part of the bottom-fixed foundation and an extending fastening arm of a floating foundation, whereupon the floating foundation of the floating part of the windmill construction is hooked onto said turntable arrangement.
  • the bottom-fixed foundation can comprise a transition piece which is modified to provide a turret mooring.
  • the bottom-fixed foundation Before mounting the floating part of the windmill construction to the bottom-fixed foundation, the bottom-fixed foundation can be reinforced.
  • Figures 1 -3 show a first embodiment of a windmill construction according to the invention, seen in perspective, front view and top view, respectively.
  • Figure 4 shows in perspective a second embodiment of a windmill construction according to the invention.
  • Figures 5a and 5b show examples of how the windmill construction according to the present invention can replace a conventional construction.
  • Figure 6 shows examples of bottom-fixed foundations with which the present invention can be combined.
  • Figure 7 shows a further embodiment of a windmill construction according to the invention.
  • Figure 8 shows an example of a turret mooring according to the invention mounted on the upper part of a bottom-fixed foundation.
  • Figure 9 shows in section the rotatably turret mooring shown in figure 8.
  • Figure 10 shows a section of the turret mooring shown in figure 9.
  • Figure 1 1 shows power production as a function of wind speed for two different windmills.
  • Horizontal force for the smallest turbine 25m from the seabed which corresponds to the same bending moment generated that the turbine at maximum power placed on top of the tower.
  • Windmill construction comprised of a floating foundation 12 which floats partially immersed in a body of water 20, where the floating foundation 12 supports at least one tower 14 equipped with a wind turbine or a windmill 16.
  • the lower part of the tower 14 will naturally form part of the floating foundation 12, and consequently the floating foundation 12 is perceived to comprise the lower part of the tower 14.
  • Said floating foundation 12, or tower 14, can further comprise one or more extending stabilizer arms 30, where said stabilizer arm(s) 30 extend from the foundation 12 in an area above a water surface 60 of the water mass 20.
  • the part of the foundation 12 which floats down in the body of water 20 can be partially filled with water to further stabilize the windmill construction.
  • the floating foundation 12 comprises a substantially elongated and horizontally arranged floating element 40 which, in a forward part, has or is connected to a turret mooring 42 for rotatably anchoring.
  • the rotatably turret mooring 42 is mounted to a bottom-fixed foundation 50 which extends from a sea surface 62 and can rotate freely about the bottom-fixed foundation 50.
  • the bottom-fixed foundation 50 thus constitutes a rigid, upwardly supporting device which holds the floating foundation 12 and thus the windmill construction in place in the body of water 20.
  • the turret mooring 42 allows the floating foundation to move "slightly" in the form of axial rotation, up/down and laterally relative to the bottom foundation. This limited freedom of movement between the bottom-fixed foundation and the floating foundation is to prevent forces in excess of the main features of the horizontal features set up from the windmills and the vertical forces which shall be trapped in the bottom-fixed foundation.
  • the turret mooring 42 can be freely rotatably mounted or supported to the bottom- fixed foundation 50 in several ways. By “freely rotatably” is meant that the windmill construction can swing under the influence of wind and water movement.
  • the turret mooring 42 is a turret in the form of a sleeve enclosing the upper part 52 of the bottom-fixed foundation 50.
  • the sleeve can be an existing transition piece on the bottom-fixed foundation 50.
  • Another variant of the turret mooring is shown in the figures 7-10 and shall be explained later.
  • the sleeve can also be arranged for vertical movement to be adapted to how deep the floating element 40 is immersed and floats in the body of water 20.
  • the rotatably turret mooring 42 can comprise an articulated connection to the floating element 40 and which allows corresponding movement.
  • the turret mooring 42 can be rotatably attached to the floating element 40 so that the floating foundation 12 and thus the windmill construction can rotate or tilt about the centre axis of the floating element 40 in the longitudinal direction of the floating element.
  • the centre axis of the floating element 40 extends substantially perpendicularly from the vertical longitudinal axis of the bottom-fixed foundation 50.
  • the bottom-fixed foundation 50 can be an existing foundation for a bottom-fixed offshore windmill, as explained in connection with fig. 6.
  • Figs. 5a and 5b show how the present windmill construction can replace a conventional fixed windmill construction.
  • Fig. 5b shows in solid lines a bottom-fixed foundation 50 in the form of a monopile extending from the seabed 62 and which is equipped with a tower 14 with a windmill 16 and which is fixed in an "anchorage" 42’ in the form of e.g., adapter.
  • the present windmill construction is shown with dashed lines.
  • fig. 5a the existing tower 14 and the windmill 16 shown in broken lines in fig. 5b are removed and the present windmill construction shown in solid lines is mounted to the bottom-fixed foundation.
  • the existing anchor 42' can be modified by providing the adapter with bearings or the like which provide a turret mooring as previously described. The latter case can be performed without removing the existing tower.
  • a further variant of an anchorage in the form of a turret mooring 42 is shown in the figures 7-10.
  • the design and working role can be reminiscent of a trailer hitched between a vehicle and a trailer.
  • a fastening rod or fastening arm 48 is fastened outwardly to the floating foundation 12, preferably in the front part of the substantially elongated and horizontally arranged floating element 40.
  • the fastening arm 48 has an approximate L-shape, but preferably with an angle of more than 90 degrees and extends up and over the upper part of the bottom-fixed foundation 50 which projects above the water surface 60.
  • the fastening arm 48 is provided on the underside with a fastening part 76 in the form of, for example, a hood with an inner and open cavity 80.
  • the turntable arrangement 70 can be mounted on the same flange as the old tower was mounted.
  • the turntable arrangement 70 comprises a fastening or pivot pin 74 provided with a head 72 in the form of a ball, where the head 72 fits into the inner and open cavity 80 of the fastening part 76 on the underside of the fastening arm 48.
  • the head 72 can be locked securely in the open cavity 80 of the fastening part 76.
  • the pivot pin 74 can be mounted in a swivel anchor 78 on the underside of the turntable arrangement 70, and the pivot pin 74 can be fixed or rotatably mounted.
  • the turntable arrangement 70 is provided with roller or plain bearings which allow said rotation of the pivot pin 74.
  • the turntable arrangement is mounted in an opposite way to that described above, in the sense that the pivot pin 74 is mounted extending downwardly from the fastening arm 48 and the fastening part 76 is mounted on the upper part of the bottom-fixed foundation 50.
  • a first part of a power line 82 for transmitting current can run through the fastening arm 48, down through the inner and open cavity 80 of the fastening part 76 and through a boring in the pivot pin 74.
  • the boring in the pivot pin 74 can pass through the head 72 of the pivot pin or through the pivot pin 74 itself. Or one places the open cavity for the head of the pivot pin in the turntable arrangement and allows the first part of the power line to pass through the mentioned rotatably holders for cavities.
  • the swivel anchor 78 can be an electric swivel and be connected to a second part of the power line 82 for transmitting power from the first part to the second part of the power line 82.
  • the first part of the power line 82 is connected to the turbines of the windmills and/or to other equipment on the windmill construction and the other part of the power line 82 is connected to other windmill constructions or in an external common meeting point, which is most convenient. Buoyancy in the floating foundation 12 is regulated so that stress on the rotatably turntable arrangement 70 is minimal.
  • a filling pipe 100 can be used for filling so that the floating part can be lowered in a controlled manner onto the bottom-fixed part. This filling pipe 100 is usually removed after the installation is completed.
  • a device can be used which produces a downward force.
  • a fastening ring 90 can be rotatably mounted about the bottom-fixed foundation 50, in an area below the turntable arrangement 70, and a block disc 94 is mounted on the underside of the floating foundation 12, such as to the floating element 40.
  • a cable 92, wire or the like runs from the fastening ring 90, over the block disc 94 and to a heavy weight 96 which hangs down in the water. A force corresponding to the weight of the weight 96 will thus be applied to the parts of the turntable arrangement 70.
  • the existing tower 14 and the windmill 16 in the conventional windmill construction can be removed in a known manner by means of a vessel with a crane. After the windmill 16 has been dismantled, the tower 14 can be hoisted by the bottom-fixed foundation 50. Thereafter, the present windmill construction which has been towed out to the relevant location can be hooked to the bottom-fixed foundation 50 so that the turntable anchor 42 is rotatably mounted to an upper part 52 of the bottom-fixed foundation 50.
  • the turntable arrangement 70 is mounted to the upper part 52 of the existing bottom-fixed foundation 50 by bolting or welding, whereupon the floating part of the windmill construction is hooked on.
  • the vessel can be equipped with a similar turntable arrangement as described and to which the floating part of the windmill construction can correspondingly be hooked.
  • the existing bottom-fixed foundation 50 can be reinforced and adapted for floating platforms for wind turbines if necessary. It can be in the form of ropes or rigid constructions that reinforce the existing foundation or be in the form of a pipe that is placed down on the outside, here there are many alternatives. Power and signal cables can either go inside the bottom-fixed foundation or in separate ways on the outside of the bottom-fixed foundation.
  • the lower part of the tower 14, in the transition to the floating foundation 12, can comprise a bow-shaped structure 150 which breaks the waves before they hit the tower 14, this in order to limit the loads against the tower at high seas.
  • the arcuate structure can be designed as a V-shaped or U-shaped arcuate cover.
  • Fig. 6 shows examples of bottom-fixed foundations 50 for use with the invention, (a) shows a gravity-based foundation, (b) shows a monopile foundation, (c) shows a lowering box foundation, (d) shows a multi-pile foundation, (e) shows a foundation with several lowering boxes and (f) shows a jack-up foundation.
  • the monopile construction shown in (b) constitutes the most commonly used variant with a proportion of approx. 74% (as of December 2012), and is the variant illustrated in the figures together with the present windmill construction.
  • the invention can of course be combined with the other variants as well or as a combination of the variants.
  • the monopile construction comprises a pipe that is forced (driven) into the seabed until it is fixed.
  • the pipe normally comprises a transition piece for receiving a tower to a windmill.
  • the windmill construction according to the invention can be attached to said transition piece or directly in the pipe which is driven down.
  • the stabilizer arm(s) 30 can protrude or hang rigidly, adjustably or freely from the floating foundation 12 in such a way that a change is obtained in a part of the stabilizer arm which is immersed in the water mass 20 by tilting the windmill construction.
  • the stabilizer arms 30 are rigidly attached to the floating foundation 12, i.e., to the lower part of the tower 14, and where each stabilizer arm 30 comprises an upper arm 32 attached to or equipped with a lower arm 34.
  • the upper arm 32 extends mainly straight out, while the lower arm 34 extends downwards towards the body of water 20.
  • the lower arm 34 is rigidly attached to the upper arm 32 via a rigid articulated connection 36 so that the lower arm is arranged at a fixed angle relative to the upper arm 32.
  • the angle between the upper arm 32 and the lower arm 34 is at right angles, but the lower arm 34 can also be arranged tilted relative to the upper arm 32 at any other angle.
  • the articulated joint 36 can be a hinge or hinge joint that allows free or controlled movement of the lower arm 34 relative to the upper arm 32.
  • the stabilizer arm(s) 30 are freely suspended, in the sense that the lower arm 34 is freely movable relative to the upper arm 32.
  • the lower arm 34 can be suspended from the upper arm 32 via an articulated connection 36 in the form of a strut, chain, wire or the like.
  • the stabilizer arm 30 can typically comprise or consist of a material of high specific gravity. It can further be advantageous if the stabilizer arm 30 comprises or consists of a material which is relatively inexpensive, which is relatively environmentally friendly and/or which can withstand harsh weather conditions offshore.
  • the lower part of the stabilizer arm 30 which is in the wave zone, like the tower 14, can be fitted or designed with an arcuate, elongated shape in the form of a cover 150 or the like set up to break incoming waves, and thus limit the load impact of the waves against the construction.
  • the stabilizer arm 30, that is more specifically the lower arm 34, can further comprise a lower collar 38 which, during movement in the water, gives a braking effect.
  • the collar 38 can be in the form of an outwardly extending circular disc.
  • the floating foundation 12 can support a first and a second tower 14 which, in relation to each other, are set up side by side and inclined.
  • Figs. 1 -4 show two twin towers 14 which are attached to the floating foundation 12, and where the foundation comprises a substantially elongated and horizontally arranged floating element 40 which, in a forward part, has an anchor 42 for rotatably anchoring and which, in a rear part, comprises said tower 14.
  • a shoulder shaft 44 extends between the two towers 14 and can be connected to upper arms 32 of the stabilizer arms 30, where a first stabilizer arm 30 of the first tower 14 extends in the opposite direction in relation to a second stabilizer arm 30 of the second tower 14.
  • beams or struts 46 can run between the floating element 40 and the towers 14 and can act as braces for the foundation and also as walkways for service personnel.
  • the foundation 12 can comprise two stabilizer arms 30, each suspended via the joint connection 36 from a shoulder shaft 44 in the form of a beam, for example rigidly connected to a rigid foundation structure.
  • the rigid shoulder shaft 44 can be said to be part of the rigid structure of the foundation.
  • the upper arm 32 can be attached to the foundation/tower 12,14 in a manner which causes it to extend downwards towards a sea surface when the foundation is in the normal position. This can be advantageous because the angle can affect whether a stabilizer arm 30 moves closer or further from a foundation centre of gravity at tilt. It can be advantageous if a stabilizer arm moves away from a centre of gravity on a side where increased torque from the stabilizer arm is desired to stabilize the foundation against tilt, and/or it can be advantageous if a stabilizer arm moves towards the centre of gravity on a side where less torque from the stabilizer arm is desirable to stabilize the foundation against tilt. Since the torque is given by force times the arm, it is advantageous, if it is desired to increase the torque to increase both the force and the arm, while it is advantageous to reduce the force and arm if a lower torque is desired.
  • the stabilizer arm 30 In a tilt of the foundation in one first direction, the stabilizer arm 30 lowers so that the part which is below the surface is increased, while a tilt in a second, opposite direction, will raise the stabilizer arm so that the part which is below the surface is reduced.
  • the force which is applied to the foundation from the stabilizer arm will decrease.
  • the force which is applied to the foundation from the stabilizer arm will increase.
  • the stabilizer arm can be suspended on one side of the foundation, in front of the foundation, or behind the foundation.
  • the stabilizer arm can be formed as a cylinder, as a cone, as a cube, or have any other shape which is suitable for the purpose of the stabilizer arm.
  • Centre of Buoyancy - COB describes the centre of gravity of buoyancy (centre of the upward force of the installation).
  • Centre of Gravity - COG describes the centre of gravity of the facility (centre of the downward acting force of the facility).
  • Righting arm Distance - GZ the longer the straightening arm, the less buoyancy needed at the end of the arm to get the same stability.
  • Figs. 1 -5 and 7 show a body (floating element 40) which lies horizontally in a body of water. In the cases shown, the centre of buoyancy is close to the water mass, which results in a high-lying COB which in turn is good for stability. When installing in shallow water, it will be possible to trim the floating element 40 in a way that means that the rear part will be slightly higher than the forward part which is anchored.
  • Figure 11 shows power production as a function of wind speed for two different windmills.
  • Fig. 1 1 shows a typical curve for turbines where 200 describes energy production for a 2 * 10 MW turbine installation at different wind speeds.
  • 202 describes thrust power for a 2 * 10 MW turbine at different wind speeds and
  • 203 shows maximum thrust power of a bottom-fixed anchorage for a 3 MW windmill that can withstand 25m above a seabed.
  • 204 shows an imaginary curve controlled by a control system, where one reduces the maximum power from 2000 KW to approx. 15,000 KW at wind speeds of 10 to 12.5 m/s to achieve reduced maximum thrust power from 3100 to 2500 KN from the turbines.
  • a built-in control system can be used which ensures that the thrust forces from the turbines do not exceed a set force. Adjustment of these forces can be done, among other things, by tilting the turbine blades, which is a well-known technology.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • Ocean & Marine Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • Sustainable Energy (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Wind Motors (AREA)

Abstract

La présente invention concerne une construction d'éolienne comprenant une fondation flottante (12) qui est partiellement immergée dans une masse d'eau (20), la fondation partiellement immergée (12) supportant au moins une tour (14) équipée d'une éolienne (16) et la fondation flottante (12) étant ancrée de manière rotative autour d'une fondation fixe inférieure (50) qui s'étend à partir d'un fond marin (62), caractérisée en ce que la fondation flottante (12) comprend un élément flottant allongé (40) qui est monté de manière rotative sur ladite fondation fixe inférieure (50) dans un amarrage à tourelle (42). L'invention concerne également un procédé d'installation d'une construction d'éolienne.
PCT/NO2022/050021 2022-01-24 2022-01-24 Construction d'éolienne et son procédé d'installation WO2023140736A1 (fr)

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Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE29908897U1 (de) * 1999-05-20 1999-08-26 Kusan Kristian Schwimmende Windenergieanlage zur Gewinnung, Speicherung und zum Verbrauch elektrischer Energie
EP1035325A1 (fr) * 1999-03-09 2000-09-13 Hartwig Dr.-Ing. Irps Eolienne transportable
GB2402109A (en) * 2003-05-27 2004-12-01 Ocean Synergy Ltd Multiple turbine offshore support structure
JP2012201191A (ja) * 2011-03-25 2012-10-22 Penta Ocean Construction Co Ltd 浮体式洋上風力発電装置の設置工法および撤去工法とその構造
US20140044541A1 (en) * 2010-11-17 2014-02-13 Ideol Installation and method for exploiting wind energy
US20190217926A1 (en) * 2016-09-26 2019-07-18 Aerodyn Consulting Singapore Pte Ltd Mooring Buoy for a Floating Wind Turbine
WO2019143283A1 (fr) * 2018-01-19 2019-07-25 Freia Offshore Ab Plateforme d'énergie éolienne flottante doté d'un dispositif à lignes tendues
WO2021219787A1 (fr) * 2020-04-30 2021-11-04 Bassoe Technology Ab Plateforme éolienne flottante semi-submersible dotée d'un ponton en forme de t
NO20200725A1 (fr) * 2020-06-19 2021-12-20

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1035325A1 (fr) * 1999-03-09 2000-09-13 Hartwig Dr.-Ing. Irps Eolienne transportable
DE29908897U1 (de) * 1999-05-20 1999-08-26 Kusan Kristian Schwimmende Windenergieanlage zur Gewinnung, Speicherung und zum Verbrauch elektrischer Energie
GB2402109A (en) * 2003-05-27 2004-12-01 Ocean Synergy Ltd Multiple turbine offshore support structure
US20140044541A1 (en) * 2010-11-17 2014-02-13 Ideol Installation and method for exploiting wind energy
JP2012201191A (ja) * 2011-03-25 2012-10-22 Penta Ocean Construction Co Ltd 浮体式洋上風力発電装置の設置工法および撤去工法とその構造
US20190217926A1 (en) * 2016-09-26 2019-07-18 Aerodyn Consulting Singapore Pte Ltd Mooring Buoy for a Floating Wind Turbine
WO2019143283A1 (fr) * 2018-01-19 2019-07-25 Freia Offshore Ab Plateforme d'énergie éolienne flottante doté d'un dispositif à lignes tendues
WO2021219787A1 (fr) * 2020-04-30 2021-11-04 Bassoe Technology Ab Plateforme éolienne flottante semi-submersible dotée d'un ponton en forme de t
NO20200725A1 (fr) * 2020-06-19 2021-12-20

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