WO2024256684A1 - Ensemble pale d'éolienne - Google Patents

Ensemble pale d'éolienne Download PDF

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Publication number
WO2024256684A1
WO2024256684A1 PCT/EP2024/066653 EP2024066653W WO2024256684A1 WO 2024256684 A1 WO2024256684 A1 WO 2024256684A1 EP 2024066653 W EP2024066653 W EP 2024066653W WO 2024256684 A1 WO2024256684 A1 WO 2024256684A1
Authority
WO
WIPO (PCT)
Prior art keywords
blade
wind turbine
auxiliary
primary
assembly
Prior art date
Legal status (The legal status 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 status listed.)
Ceased
Application number
PCT/EP2024/066653
Other languages
English (en)
Inventor
James Smyth
Peter Smyth
David Smyth
Gerard Smyth
Andrew Smyth
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Anytime Power Ltd
Original Assignee
Anytime Power Ltd
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 Anytime Power Ltd filed Critical Anytime Power Ltd
Priority to EP24734840.2A priority Critical patent/EP4728178A1/fr
Publication of WO2024256684A1 publication Critical patent/WO2024256684A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

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
    • F03D1/00—Wind motors with rotation axis substantially parallel to the air flow entering the rotor 
    • F03D1/06—Rotors
    • F03D1/0608—Rotors characterised by their aerodynamic shape
    • 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
    • F03D1/00—Wind motors with rotation axis substantially parallel to the air flow entering the rotor 
    • F03D1/06—Rotors
    • F03D1/0608—Rotors characterised by their aerodynamic shape
    • F03D1/0633—Rotors characterised by their aerodynamic shape of the blades
    • F03D1/06495—Aerodynamic elements attached to or formed with the blade, e.g. flaps, vortex generators or noise reducers
    • 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
    • F03D1/00—Wind motors with rotation axis substantially parallel to the air flow entering the rotor 
    • F03D1/06—Rotors
    • F03D1/065—Rotors characterised by their construction elements
    • 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
    • F03D1/00—Wind motors with rotation axis substantially parallel to the air flow entering the rotor 
    • F03D1/06—Rotors
    • F03D1/065—Rotors characterised by their construction elements
    • F03D1/0675—Rotors characterised by their construction elements of the blades
    • 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
    • F03D3/00—Wind motors with rotation axis substantially perpendicular to the air flow entering the rotor 
    • F03D3/06—Rotors
    • F03D3/061—Rotors characterised by their aerodynamic shape, e.g. aerofoil profiles
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05B—INDEXING SCHEME RELATING TO WIND, SPRING, WEIGHT, INERTIA OR LIKE MOTORS, TO MACHINES OR ENGINES FOR LIQUIDS COVERED BY SUBCLASSES F03B, F03D AND F03G
    • F05B2240/00—Components
    • F05B2240/20—Rotors
    • F05B2240/30—Characteristics of rotor blades, i.e. of any element transforming dynamic fluid energy to or from rotational energy and being attached to a rotor
    • F05B2240/305—Flaps, slats or spoilers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05B—INDEXING SCHEME RELATING TO WIND, SPRING, WEIGHT, INERTIA OR LIKE MOTORS, TO MACHINES OR ENGINES FOR LIQUIDS COVERED BY SUBCLASSES F03B, F03D AND F03G
    • F05B2240/00—Components
    • F05B2240/40—Use of a multiplicity of similar components
    • 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

Definitions

  • This invention relates to a wind turbine blade assembly, and in particular to a blade assembly including a main blade and an array of auxiliary blades which is adapted to extract greater power from the oncoming wind.
  • US2014/0271216 discloses a horizontal axis wind turbine include a number of main blades, each of which is augmented with one or more secondary blades mounted to the main blade.
  • a single secondary blade is mounted to the main blade in a position rotationally ahead of the main blade relative to the direction of operational rotation, and also positioned axially behind the main blade in an area in which air has not been disturbed by the main blade.
  • the single secondary blade is mounted to a suction side of the main blade.
  • one secondary blade is mounted to a suction side of the main blade while another secondary blade is mounted to a pressure side of the main blade.
  • a pair of secondary blades are mounted in a stacked configuration to a suction side of the main blade. The secondary blades due not overlap or overlie the main blade and are always positioned axially spaced from the main blade in order to achieve the desired positioned of the secondary blades in an area of undisturbed airflow.
  • a wind turbine blade assembly comprising a primary blade having a leading edge and a trailing edge between which are defined a pressure side and a suction side; a first auxiliary blade mounted in spaced relationship to the pressure side, trailing the leading edge and extending substantially parallel to a longitudinal axis of the primary blade, a second auxiliary blade mounted in spaced relationship to a pressure side of the first auxiliary blade trailing a leading edge thereof, and a third auxiliary blade mounted in spaced relationship to a pressure side of the second auxiliary blade trailing a leading edge thereof.
  • the wind turbine blade assembly comprises at least one auxiliary blade mounted in spaced relationship to the suction side of the primary blade, leading the leading edge and extending substantially parallel to a longitudinal axis of the primary blade.
  • the at least one auxiliary blade has a chord length less than the chord length of the primary blade.
  • the chord length of the at least auxiliary blade is between 20% and 100% of the chord length of the primary blade.
  • the at least one auxiliary blade has a length less than the length of the primary blade.
  • the length of the at least one auxiliary blade is between 20% and 100% of the length of the primary blade.
  • the at least one auxiliary blade is mounted over a tip section and a mid section of the primary blade.
  • the primary blade and the at least one auxiliary blade comprise a twist along the length thereof.
  • the wind turbine blade assembly comprises at least one tertiary blade securing the at least one auxiliary blade to the primary blade.
  • the wind turbine blade assembly comprises three tertiary blades spaced from one another along the longitudinal axis of the blade.
  • the at least one tertiary blade is configured to generate lift directed towards a root of the primary blade.
  • the at least one tertiary blade is configured to generate, during rotation of the blade assembly, an amount of lift sufficient to substantially offset the centrifugal force experienced by the blade assembly during said rotation.
  • the wind turbine blade assembly comprises a plurality of modular sections defined between adjacent tertiary blades.
  • each auxiliary blade located on the pressure side of the main blade at least partially overlaps each immediately adjacent auxiliary blade located on the pressure side of the main blade.
  • the auxiliary blades comprise a different material to the main blade.
  • a wind turbine comprising an array of the wind turbine blade assemblies according to the first aspect of the invention.
  • Figure 1 illustrates a perspective upstream view of a wind turbine according to an aspect of the present invention
  • Figure 2 illustrates a perspective view from an upstream perspective of a wind turbine blade assembly according to an aspect of the present invention and forming part of the wind turbine of Figure 1 ;
  • FIG 3 illustrates an alternative perspective view of the wind turbine blade assembly shown in Figure 2;
  • Figure 4 illustrates the wind turbine blade assembly of Figures 2 and 3 with a plurality of tertiary blades omitted;
  • FIG. 10 a wind turbine blade assembly, generally indicated as 10, for use on an otherwise conventional horizontal axis wind turbine 12, most preferably one including three of the blade assemblies 10 as illustrated in Figure 1 , although it will be appreciated that this number may be varied as required to suit the particular design and/or function of the wind turbine 12.
  • the blade assembly 10 comprises a primary blade 14 which is preferably of relatively conventional design, and may be manufactured from any suitable material or combination therefore, for example carbon composite or the like.
  • the primary blade 14 may be of any suitable size and shape to suit a particular application.
  • the primary blade 14 may for example be somewhere in the region of 50m to 100m in length.
  • the primary blade 14 will preferably include a twist along the length thereof, namely along a longitudinal blade axis AA or longitudinal direction in order to provide the optimum angle of attach at each point along the working length of the blade 14.
  • the chord length and/or aerofoil cross section of the primary blade 14 may also varies from a root 16 to tip 18 as is well known in the art and no further detail is therefore considered necessary regarding this aspect of the design of the primary blade 14.
  • the primary blade 14 comprises a leading edge 20 and a trailing edge 22 between which are defined a pressure side 24 and a suction side 26, again as is well known in the art.
  • the leading edge 20 faces into the oncoming wind which flows around the primary blade 14 causing an increase in pressure over the pressure side and a reduction in pressure over the suction side 26, the net effect of which is the generation of lift in order to cause the primary blade 14 to rotate around the axis of the turbine 12 in order to generate power.
  • Airflow is generally considered to move in an “axial direction”, namely substantially parallel to an axis of rotation RR of the blade assembly 10 of the turbine.
  • auxiliary blades Mounted to the primary blade 14 are a plurality of auxiliary blades, and in the preferred embodiment a first auxiliary blade 28 mounted adjacent and in spaced parallel relationship to the pressure side 24 of the primary blade 14; a second auxiliary blade 30 mounted parallel and in spaced relationship to the first auxiliary blade 28; a third auxiliary blade 32 mounted parallel and in spaced relationship to the second auxiliary blade 30; and a fourth auxiliary blade 34 mounted adjacent and in spaced parallel relationship to the suction side 26 of the primary blade 14.
  • the auxiliary blades 28, 30, 32, 34 are preferably secured to the primary blade 14 by means of a plurality of tertiary blades, and in the preferred embodiment illustrated a first tertiary blade 36 adjacent the tip 18, second tertiary blade 38 longitudinally spaced from the first tertiary blade 36 in the direction of the root 16, and a third tertiary blade 40 longitudinally spaced from the second tertiary blade 38 in the direction of the root 16.
  • the configuration and operation of the tertiary blades 36, 38, 40 will be described in greater detail hereinafter.
  • the first auxiliary blade 28 is mounted above and at least partially overlapping in the axial direction the pressure side 24 of the primary blade 14.
  • the leading edge of the first auxiliary blade 28 is positioned to be trailing or downstream of the leading edge 20 of the primary blade 14 during rotation thereof and relative to the oncoming wind, but leading the trailing edge 22 such as to at least partially overlap or overlie the pressure side of the main blade 10.
  • the amount of overlap and/or offset between the first auxiliary blade 28 and the main blade 10 will be determined by the operating parameters of the wind turbine 12, and most notably by the speed or rotation of the blade assembly 10 and/or the speed of the oncoming wind.
  • the relative position of the first auxiliary blade 28 preferably varies along length of main blade 14, with a greater offset towards the root 16.
  • the auxiliary blade 28 is therefore positioned to augment that area of airflow, as detailed hereinafter.
  • the first auxiliary blade 28 has a chord length less than or equal to the chord length of the primary blade 14, and in a preferred embodiment has a chord length of between 20% and 100% of the chord length of the primary blade 14, more preferably between 20% and 50%.
  • the length of the first auxiliary blade 28 is preferably selected to cover the majority of the lift generating portion of the primary blade 14, and as a result preferably does not extend to adjacent the root 16, although this may vary if required for functional or structural reasons.
  • the first auxiliary blade 28 has a length in the longitudinal direction of between 20% and 100% of the length of the primary blade 14 but again the dimensions may be varied as required. It is for example possible that one or more of the auxiliary blades 28, 30, 32, 34 is connected directly to the hub of the turbine 12.
  • the second auxiliary blade 30 is positioned relative to the first auxiliary blade 28 in a similar configuration, with a leading edge trailing or downstream of the leading edge of the first auxiliary blade 28 but leading or upstream of the trailing edge of the first auxiliary blade in order to be at least partially overlapping in the axial direction, with the second auxiliary blade 30 substantially parallel and spaced from the pressure side of the first auxiliary blade 28.
  • the exact position, size and configuration of the second auxiliary blade 30 may vary and will be determined to a large extend by the performance requirements of the wind turbine 12.
  • the third auxiliary blade 32 is likewise positioned relative to the second auxiliary blade 30, with a leading edge trailing or downstream of the leading edge of the second auxiliary blade 30 but leading or upstream of the trailing edge of the second auxiliary blade in order to be at least partially overlapping in the axial direction, the third auxiliary blade 32 parallel and spaced from the pressure side of the second auxiliary blade 30.
  • the fourth auxiliary blade 34 is located over the suction side 26 and is positioned with a leading edge leading or upstream of the leading edge 20 of the primary blade 14 such that the array of auxiliary blades 28, 30, 32, 34 together with the primary blade 14 form a stepped or so called “delta” array with the fourth auxiliary blade 34 being the most forwardly or upstream blade and each subsequent or immediately adjacent blade being offset in the downstream direction.
  • This arrangement can help to reduce drag on the downstream blades, leading to greater wind loading hitting the blades which is then resolved into lift and drag components and the delta formation lends itself to keeping the pressure and friction drag to a minimum (similar to bird or aeroplane formations) resulting in grater lift and more power for same wind speed.
  • auxiliary blades 28, 30, 32, 34 will vary depending on the overall dimensions and configuration of the blade assembly 10, in addition to the particular application in which the blade assembly 10 is employed and/or desired operating/performance characteristics such as optimising lift, minimising drag, overall system weight, modularity, etc.
  • the auxiliary blades 28, 30, 32, 34 are secured to the primary blade 14 via the tertiary blades 36, 38, 40 the auxiliary blades 28, 30, 32, 34 do not require a root which is load bearing and modified for mounting to a hub or the wind turbine 12.
  • the auxiliary blades 28, 30, 32, 34 can have a relatively constant cross section and/or wall thickness in order to allow weight optimisation, as the auxiliary blades 28, 30, 32, 34 are not load bearing to the same extent as the primary blade 14.
  • the auxiliary blades 28, 30, 32, 34 may as result comprise a different material or grade of material to the main blade 10 due to the different functional requirements thereof.
  • the auxiliary blades 28, 30, 32, 34 may have a constant aerofoil cross section along the length thereof, or the cross section may vary according to requirements.
  • the auxiliary blades 28, 30, 32, 34 may include a twist along the length therefore corresponding to any twist on the primary blade 14, thereby maintain a relatively parallel alignment between each set of adjacent blades in order to reduce turbulent airflow therebetween.
  • auxiliary blades 28, 30, 32, 34 acts to minimise the solidity of the rotor formed by rotation of the blade assembly 10 while increasing the effective depth of the cutting edge of the blade assembly 10 (in the oncoming wind direction) and in doing so will generate an increased wind load force which defined by the lift force and drag force, and by reducing the total drag force resulting in an overall greater lift force.
  • the degree of overlap of the auxiliary blades 28, 30, 32, 34 is selected to take the blade rotation speed into consideration.
  • auxiliary blades 28, 30, 32, 34 at least one of the blades may be structurally designed as a load bearing member to transfer the wind loading back to the hub of the wind turbine 12 during operation of the wind turbine 12. In this way the remaining auxiliary blades 28, 30, 32, 34 can be made non-load bearing and thus lighter in weight. The wind loading is therefore transferred from the other lighter weight auxiliary blades 28, 30, 32, 34 through the at least one load bearing auxiliary blades 28, 30, 32, 34, through the tertiary blades 36, 38, 40 to the primary blade 14.
  • Some of aerofoil blades that make up a formation blade are of different lengths for different formations.
  • the aerofoil profile of the auxiliary blades 28, 30, 32, 34 will have the same or lower angle of attack to that of a conventional optimised blade utilised in horizontal type wind turbines. This is to ensure extra pressure drag of the combined blade assembly 10 is kept to minimum compared to the extra lift generated due to the “delta” formation.
  • each tertiary blade 36, 38, 40 comprising a primary opening 42 through which the primary blade 14 extends, and four auxiliary openings 44 through which the respective auxiliary blade 28, 30, 32, 34 extend. It will of course be understood that any other suitable interface may be employed, although the exemplary arrangement minimises or eliminates the use of additional fixtures which may introduce turbulence. An adhesive or the like may be employed to secure the tertiary blades 36, 38, 40 to the primary blade 14 and auxiliary blades 28, 30, 32, 34.
  • the tertiary blades 36, 38, 40 While the primary function of the tertiary blades 36, 38, 40 is structural, given the application it is preferable that the tertiary blades 36, 38, 40 are aerodynamically optimised. In a most preferred arrangement the tertiary blades 36, 38, 40 have an aerofoil cross section, and referring to Figure 5 define a pressure side 46 facing the tip 18 and a suction side 48 facing the root 16 of the primary blade 14. With such a configuration the tertiary blades 36, 38, 40 will themselves generate lift, and in the direction of the root 16 of the primary blade 14 thereby at least partially offsetting the centrifugal force generated by rotation of the blade assembly 10.
  • the aerofoil profile, size and positioning of the tertiary blades 36, 38, 40 may be varied as required in order to establish desired performance characteristics.
  • the auxiliary blades 28, 30, 32, 34 to be stronger, lighter/or thinner while not compromising on blade strength or excessive pressure or friction drag generated. Therefore the depth of the blade in the direction of the wind is increased while keeping the weight of the blade to a minimum while maximising the blade area cutting the wind. This design will result in the blade going faster at the same wind speed taking the generator required torque force for a given power output into account.

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

Abstract

La présente invention concerne un ensemble pale d'éolienne, et en particulier un ensemble pale comprenant une pale primaire ayant un bord d'attaque et un bord de fuite entre lesquels sont définis un côté pression et un côté aspiration, et un réseau de pales auxiliaires montées en relation espacée par rapport au côté pression, arrière du bord d'attaque et s'étendant sensiblement parallèlement à un axe longitudinal de la pale primaire.
PCT/EP2024/066653 2023-06-16 2024-06-14 Ensemble pale d'éolienne Ceased WO2024256684A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP24734840.2A EP4728178A1 (fr) 2023-06-16 2024-06-14 Ensemble pale d'éolienne

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB2309004.6 2023-06-16
GB2309004.6A GB2630973A (en) 2023-06-16 2023-06-16 A wind turbine blade assembly

Publications (1)

Publication Number Publication Date
WO2024256684A1 true WO2024256684A1 (fr) 2024-12-19

Family

ID=91617249

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2024/066653 Ceased WO2024256684A1 (fr) 2023-06-16 2024-06-14 Ensemble pale d'éolienne

Country Status (3)

Country Link
EP (1) EP4728178A1 (fr)
GB (1) GB2630973A (fr)
WO (1) WO2024256684A1 (fr)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20140271216A1 (en) 2013-03-15 2014-09-18 George J. Syrovy Horizontal axis wind or water turbine with forked or multi-blade upper segments
WO2014162312A1 (fr) * 2013-04-04 2014-10-09 Windfire B.V. Commande de turbine éolienne du type à rotor à axe vertical
US20150275856A1 (en) * 2012-10-12 2015-10-01 Joint Blade Rotor A/S Joined Blade Wind Turbine Rotor
EP3179093A1 (fr) * 2015-12-08 2017-06-14 Winfoor AB Pale de rotor pour une éolienne et un sous-élément

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DK176317B1 (da) * 2005-10-17 2007-07-30 Lm Glasfiber As Vinge til en rotor på et vindenergianlæg
JP2009074447A (ja) * 2007-09-20 2009-04-09 Yamaguchi Prefecture 垂直軸型風車
US8834127B2 (en) * 2011-09-09 2014-09-16 General Electric Company Extension for rotor blade in wind turbine
DK201570349A1 (en) * 2015-06-04 2016-05-17 Vestas Wind Sys As Wind turbine rotor blade
WO2020016418A1 (fr) * 2018-07-20 2020-01-23 Nederlandse Organisatie Voor Toegepast-Natuurwetenschappelijk Onderzoek Tno Système et procédé d'amortissement de torsion aérodynamique d'une pale de rotor de turbine éolienne
CN113090442B (zh) * 2019-12-23 2022-09-06 江苏金风科技有限公司 可调节翼叶片、其控制方法、控制装置和风力发电机组

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20150275856A1 (en) * 2012-10-12 2015-10-01 Joint Blade Rotor A/S Joined Blade Wind Turbine Rotor
US20140271216A1 (en) 2013-03-15 2014-09-18 George J. Syrovy Horizontal axis wind or water turbine with forked or multi-blade upper segments
WO2014162312A1 (fr) * 2013-04-04 2014-10-09 Windfire B.V. Commande de turbine éolienne du type à rotor à axe vertical
EP3179093A1 (fr) * 2015-12-08 2017-06-14 Winfoor AB Pale de rotor pour une éolienne et un sous-élément

Also Published As

Publication number Publication date
GB2630973A (en) 2024-12-18
EP4728178A1 (fr) 2026-04-22

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