WO2011039404A1 - Procédé d'amélioration de l'efficacité d'une éolienne ou d'une turbine hydraulique et éolienne/turbine correspondante - Google Patents

Procédé d'amélioration de l'efficacité d'une éolienne ou d'une turbine hydraulique et éolienne/turbine correspondante Download PDF

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Publication number
WO2011039404A1
WO2011039404A1 PCT/FI2009/050790 FI2009050790W WO2011039404A1 WO 2011039404 A1 WO2011039404 A1 WO 2011039404A1 FI 2009050790 W FI2009050790 W FI 2009050790W WO 2011039404 A1 WO2011039404 A1 WO 2011039404A1
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WO
WIPO (PCT)
Prior art keywords
blades
turbine
blade
axis
wind
Prior art date
Application number
PCT/FI2009/050790
Other languages
English (en)
Inventor
Matti Nurmia
Original Assignee
Cuycha Innovation Oy
University Consultants Oy
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 Cuycha Innovation Oy, University Consultants Oy filed Critical Cuycha Innovation Oy
Priority to PCT/FI2009/050790 priority Critical patent/WO2011039404A1/fr
Publication of WO2011039404A1 publication Critical patent/WO2011039404A1/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
    • F03D3/00—Wind motors with rotation axis substantially perpendicular to the air flow entering the rotor 
    • F03D3/005—Wind motors with rotation axis substantially perpendicular to the air flow entering the rotor  the axis being vertical
    • 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
    • F03B—MACHINES OR ENGINES FOR LIQUIDS
    • F03B17/00—Other machines or engines
    • F03B17/06—Other machines or engines using liquid flow with predominantly kinetic energy conversion, e.g. of swinging-flap type, "run-of-river", "ultra-low head"
    • F03B17/062—Other machines or engines using liquid flow with predominantly kinetic energy conversion, e.g. of swinging-flap type, "run-of-river", "ultra-low head" with rotation axis substantially at right angle to flow direction
    • F03B17/065—Other machines or engines using liquid flow with predominantly kinetic energy conversion, e.g. of swinging-flap type, "run-of-river", "ultra-low head" with rotation axis substantially at right angle to flow direction the flow engaging parts having a cyclic movement relative to the rotor during its rotation
    • F03B17/067—Other machines or engines using liquid flow with predominantly kinetic energy conversion, e.g. of swinging-flap type, "run-of-river", "ultra-low head" with rotation axis substantially at right angle to flow direction the flow engaging parts having a cyclic movement relative to the rotor during its rotation the cyclic relative movement being positively coupled to the movement of rotation
    • 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
    • F03D3/062—Rotors characterised by their construction elements
    • F03D3/066—Rotors characterised by their construction elements the wind engaging parts being movable relative to the rotor
    • F03D3/067—Cyclic movements
    • F03D3/068—Cyclic movements mechanically controlled by the rotor structure
    • 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
    • F03D5/00—Other wind motors
    • F03D5/04—Other wind motors the wind-engaging parts being attached to carriages running on tracks or the like
    • 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
    • F03D7/00—Controlling wind motors 
    • F03D7/06—Controlling wind motors  the wind motors having rotation axis substantially perpendicular to the air flow entering the rotor
    • 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
    • F05B2210/00—Working fluid
    • F05B2210/16—Air or water being indistinctly used as working fluid, i.e. the machine can work equally with air or water without any modification
    • 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
    • F05B2250/00—Geometry
    • F05B2250/20—Geometry three-dimensional
    • F05B2250/23—Geometry three-dimensional prismatic
    • F05B2250/232—Geometry three-dimensional prismatic conical
    • 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
    • F05B2260/00—Function
    • F05B2260/70—Adjusting of angle of incidence or attack of rotating blades
    • F05B2260/79—Bearing, support or actuation arrangements therefor
    • 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
    • Y02E10/30—Energy from the sea, e.g. using wave energy or salinity gradient
    • 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
    • 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
    • Y02E10/74—Wind turbines with rotation axis perpendicular to the wind direction

Definitions

  • the object of the invention is a method for improving the efficiency of a wind or water turbine, in which method the blades are mounted at their base with bearings into a structure with the help of which they are caused to move along a conical surface that opens away from said structure.
  • the typical solution in the utilization of wind energy is a horizontal axis, usually a three-bladed wind turbine (for instance US 6752595 and US 6940185 and the references mentioned therein).
  • This solution has several drawbacks: - The velocity of wind increases under normal circumstances as the height measured from the surface of the earth or the sea increases. It follows from this that the blades of a horizontal-axis turbine in their rotation have to function in a cyclically changing wind velocity. This worsens the efficiency of the energy production and places large demands on the mechanical durability of the blades. The latter will also be challenged by the cyclical torques caused by the weight of the blades.
  • the slowly moving basal parts of the blades of horizontal-axis turbines must be shaped very wide (for example, US 6752595) for them to produce energy, but such blades are heavy and expensive.
  • coefficient of power C P which expresses how large a fraction of the energy of the air flow passing through the set of blades of the turbine can be transferred to the turbine (3) .
  • the coefficient of power of a horizontal-axis turbine depends on the ratio ⁇ of the peripheral velocity v of the blade tips to the wind velocity u so that the coefficient of power has a maximum when ⁇ ⁇ 6, from which the coefficient of power decreases to ca . one half of its maximum value at the
  • the purpose of this invention is to find a solution to this problem, the description of which has to start with the known vertical-axis wind turbines.
  • the orbital motion of the blade of Fig. la is shown schematically in Fig. lb.
  • the orbit has been divided into four sectors so that most of the energy production takes place in Sectors 1 and 3.
  • Sector 1 deflects the airflow according to the arrows and Sector 3 restores the flow approximately into its original direction.
  • Sectors 2 and 4 the blades are nearly "feathered" so that the force acting on them mostly consists of drag of the air flow.
  • the vertical- axis turbines have the advantage that their blades capture energy from the medium flow that passes through a sector that opens away from the machinery of the turbine that is not disturbed by other structures of the turbine.
  • a limitation of this technique is that although the opening angle of the cone of motion of the blades can be adjusted, the orbit of motion of the blades is a circle in the cross section. From this follows that the blades spend one half of the time in Sectors 2 and 4 in Fig. lb, where they produce very little energy. Further, the direction of motion of the blades in a large part of Sectors 1 and 3 is not close to the geometry of optimal energy production.
  • the objective of this invention is to provide an improvement in a wind or water turbine.
  • the characteristic features of the method according to this invention are presented in Claim 1 and the corresponding turbine in Claim 10.
  • Changing the opening angle provides a degree of freedom for adapting the turbine to operate under different conditions of the flow of the medium, for instance, under a changing force of the wind.
  • the blades Upon reducing the opening angle from the 45° used in the known art the blades will reach higher and have access to higher velocities of wind or sea current. As a reduction of the opening angle reduces the peripheral velocity of the blade tips of the turbine, it enables an increase of the length of the blades.
  • the blades are arranged to move along a flattened conical surface, the horizontal cross section of which is an oval.
  • the conical surface is oriented so that the major axis of the oval is nearly at right angles to the direction of the wind (Fig. 2a and 2b) .
  • a flattened orbit of motion is more advantageous for the production of energy than the circular orbit of known technology shown in Fig. lb, for in it a larger portion of the orbit is directed sideways to the wind and a correspondingly smaller part against and with the wind.
  • a flattened orbit of motion is created by cyclically changing the angle between the blades and the axis of the turbine as the turbine rotates.
  • the blades are articulated at their base to the rotating base plate of the turbine, so that their base parts move along circular orbits, whereas the other parts move ⁇ along orbits that are the more elliptical, the higher one ascends along the blade. This enables the efficient utilization of the stronger winds blowing at higher elevations.
  • the orbit of the blade is symmetrical with respect to the axis of the turbine (Fig. 2a) . If there is only one cycle per revolution, the blade moves along an eccentric orbit according to Fig. 2b.
  • the eccentricity of the orbit reduces the moment of the drag forces acting on the blade as it moves against the wind in Sector 4 so that the energy efficiency of the turbine improves.
  • the cyclical adjustment of the orbit of the blades it is possible to utilize aerodynamic forces and the orbit can be controlled mechanically or hydraulically, as will be explained in the Embodiments .
  • the operation of the turbine can be optimized by adjusting the following parameters with, e.g., the help of a processor: -the average opening angle ⁇ of the cone of motion of the blades,
  • the first three can be combined in the control automation to the instantaneous opening angle a n of the blade, which is the angle between the axis of Blade n and the axis of the turbine.
  • the opening angles are adjusted with a control mechanism situated in the middle of the turbine.
  • the changes can be assisted with aerodynamical forces by changing the momentary pitch angles ⁇ ⁇ of the blades, which angles can be controlled during the rotation of the turbine with servo or other mechanisms connected to the blades.
  • the turbine is preferably equipped with a syncronizing mechanism to control all blades or bladepairs dependently with respect to one another.
  • Fig. la shows a wind turbine representing known technology of
  • Fig. lb shows the orbit of blades and the flow of air in the blades of the said turbine.
  • Figs 2a and b show some flattened orbits of the blades of a turbine according to the present invention.
  • Fig. 3a shows schematically the turbine described in
  • Fig. 3b shows a mechanical coupling of the blade cradles of the said turbine.
  • Fig. 3c shows a hydraulic coupling of the blade cradles of the said turbine.
  • Fig. 4 shows schematically the turbine described in
  • Fig. 5a shows a sectional view of a turbine equipped with a particular mechanism for the control of the blades.
  • Fig. 5b shows the turbine of Fig. 5a with the blades in an opened position.
  • Fig. 6 shows some applications of a water turbine according to this invention.
  • FIG. 3a there are four blades 11 and the center of their orbit ellipse is on the axis of the turbine.
  • Each a has two maxima and two minima during each revolution of the turbine so that the phase difference between the motions of two adjacent blades is 180° and
  • Each blade is mounted with bearings into a "cradle" 13 so that they can be turned about their longitudinal axis for adjusting their pitch angle ⁇ .
  • the cradles are mounted with bearings onto the base plate 14 of the turbine and they and the blades are approximately balanced with counterweights 16.
  • the pendulum motion can be controlled independently of the aerodynamic forces with hydraulic cylinders 24.
  • Fig. 3c is schematically presented a variation where the blades are connected together hydraulically with the help of doubly acting cylinders 61 - 64.
  • the cylinders can also be used in active control of the motion of the blades (not shown) .
  • the base plate 14 rests on pedestal 32 supported by bearing 31.
  • the energy produced by the turbine is transferred with a planetary transmission formed by gear ring 33 and gears 34 and 35 to generator 37.
  • the control unit of the turbine blades 38 and mast 39 In the middle of base plate 14 is the control unit of the turbine blades 38 and mast 39, in which are the sensors for the wind direction and strength.
  • the required electrical energy is brought to the rotating structure of the turbine with slip rings placed underneath control unit 38, to which the energy is brought through the hollow shafts of gears 34 (not shown) .
  • Adjustment of the opening angle ⁇ of the orbital cone of the blades is used in known technology. In this invention the opening angle can be reduced in a strong wind even to negative values, in which case the central forces acting on the blades are reduced and the rotation speed of the turbine can be increased.
  • the amplitude ⁇ of the pendulum motion of the blades can be reduced or the pendulum motion can be stopped.
  • the turbine blades 11 perform only one cycle of pendulum motion during each revolution of the turbine.
  • the base plate 14 of the turbine is coupled directly to the hollow axis 36 of generator 37.
  • Inside the axis is a nonrotating inner axis 51, onto which is attached an adjustable eccentric or crank 52.
  • the blades are in the middle position of their pendulum motion, i.e., in the sectors 1 and 3 of Fig. 2b.
  • the cradle of each blade is connected to the eccentric with levers 53 in which there are joints 54.
  • the coupling transforms the sinusoidal motion of the eccentric into an a symmetrical one so that the sine of the opening angle a of the blades increases as the blades move from Sector 1 to Sector 2 more than it decreases as they move from Sector 3 to Sector 4. This produces the ellipticity of the orbit of the blades, which can be adjusted by changing the eccentricity of the eccentric 52.
  • the control unit 38 and mast 39 are similar to those in the previous Embodiment.
  • the electrical energy required for the control is brought with an induction coil 40 (for instance, US 7352929) .
  • the long blades of high-power wind turbines have to endure the aerodynamical and central forces directed into them in strong wind.
  • the rigidity of the blades against flexure can be substantially increased with shrouds.
  • shrouds 41 By prestressing the blades so that they curve away from the rotation axis of the turbine when free, one can use shrouds 41 only on the side of the rotation axis of the turbine to carry the central forces arising as the turbine rotates.
  • Such blade constructions offer an advantageous opportunity to use carbon nanotube plastics that contain covalent bonds (hybtonite®) .
  • the blades of the turbine travel along a flattened conical surface, the opening angle of which can be adjusted during the operation of the turbine while the pitch angle of the blades with respect to the flow of the medium meeting them is adjusted in the manner presented in the classic publication by Darrieus in 1931 (8).
  • the concave formed blades 11 are mounted with bearings onto blade supports 16 so that they can be turned around their longitudinal axis to adjust the pitch angle of the blades.
  • an eccentric 71 on the axis of the turbine, from which control rods 72 transmit the adjusting motion to blades 11, is used in the adjustment.
  • the blade supports 16 are mounted with bearings 15 onto the rotating base plate 14 of the turbine so that the supports and the blades can be turned in order to change the opening angle of the cone of motion of the blades.
  • the control rods 72 are connected to the blades 11 with ball joints placed on the axis of bearings 15.
  • the opening angle of the cone of motion of the blades is controlled by two mechanisms, of which the first one comprises, situated on the axis of the turbine, a bearing 73 that can be moved in the vertical direction and that is connected with control rods 74 to summing levers . 75. From these the control motions are transmitted via joints 76 to the lower part of blade supports 16. This mechanism is used to control the opening angle of the cone of motion of the blades so that in light winds the power of the turbine is increased by using a large opening angle and in strong winds the opening angle is reduced to reduce the stress directed to the blades.
  • gears 82 In the second mechanism of controlling the opening angle of the cone of motion of the blades there is a gear ring 81 attached to the nonrotating body of the turbine that drives four gears 82 with a gear ratio of 1:2. Gears 82 have cranks 83 that are connected with rods 84 equipped with ball joints to the lower end of summing levers 75.
  • This control mechanism causes the blades to move out- and inwards twice during each revolution of the turbine. Due to this motion each point of the blades will describe an orbit that is the more flattened, the higher the point concerned is in the blade.
  • the bearing 73 that controls the opening angle of the cone of motion of the blades is at its lowest position and cranks in the gears 83 are at their outermost position.
  • the blades 11 are in a vertical position and as close as possible to the axis of rotation of the turbine, while the other pair of blades that is only partially visible in the Figure is somewhat farther from the axis.
  • the turbine is in the position used in strong winds. In light winds the bearing 73 is moved higher (Fig. 5b) , while the second control mechanism keeps the cone of motion of the blades flattened, but its average opening angle increases and the turbine captures a larger moving mass of air.
  • FIG. 6 A water turbine intended for the utilization of tidal and other water currents is presented schematically in Fig. 6.
  • the turbine and its machinery are attached to a base plate 31 made of, e.g. concrete, which is placed on the bottom of a body of water of suitable depth.
  • a base plate 31 made of, e.g. concrete, which is placed on the bottom of a body of water of suitable depth.
  • Turbines can be placed in rows or fields in suitable locations. Turbines can also be placed in other positions, for instance, on the side of artificial islands, barrier structures, canals, or river banks (Fig. 6) .
  • the invention can be applied also in the context of closed blade structures such as a wind and water mill of exactly the Darrieus type.
  • closed blade structures such as a wind and water mill of exactly the Darrieus type.
  • the blades are articulated to a vertical axis at both bottom and top, and by cyclically varying the vertical articulation distance of these the mentioned flattened conical surface, or in the context of a Darrieus rotor, a flattened ellipsoidal surface is attained.
  • the blades are elastic so that that they can be bent to different radii of curvature.
  • Rigid blades are instead made of two parts and they have an intermediate joint at the outermost point of their circumference. Into the rigid blades it is possible in this case to arrange for an adjustment of the blade angle.
  • a closed blade structure easily enables equipping the central axis with shrouds also above the blades, which substantially lightens the structure.
  • each blade In connection with the upper or lower joint, or both, of each blade there are associated means for providing a cyclical axial motion, which implements a radial motion (not shown) .

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • Sustainable Energy (AREA)
  • Power Engineering (AREA)
  • Aviation & Aerospace Engineering (AREA)
  • Wind Motors (AREA)

Abstract

L'invention concerne un procédé d'amélioration de l'efficacité d'une éolienne/turbine, dans lequel des aubes (11) sont équipées de supports au niveau de leur extrémité basale sur une structure (14) qui tourne autour d'un axe (36). L'angle d'ouverture entre les aubes (11) et l'axe (36) de l'éolienne/de la turbine est modifié de manière cyclique afin de guider l'orbite de rotation de chaque aube le long d'une surface conique plate (c). L'invention concerne également l'éolienne/la turbine correspondante.
PCT/FI2009/050790 2009-10-01 2009-10-01 Procédé d'amélioration de l'efficacité d'une éolienne ou d'une turbine hydraulique et éolienne/turbine correspondante WO2011039404A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/FI2009/050790 WO2011039404A1 (fr) 2009-10-01 2009-10-01 Procédé d'amélioration de l'efficacité d'une éolienne ou d'une turbine hydraulique et éolienne/turbine correspondante

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/FI2009/050790 WO2011039404A1 (fr) 2009-10-01 2009-10-01 Procédé d'amélioration de l'efficacité d'une éolienne ou d'une turbine hydraulique et éolienne/turbine correspondante

Publications (1)

Publication Number Publication Date
WO2011039404A1 true WO2011039404A1 (fr) 2011-04-07

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Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102953928A (zh) * 2012-10-17 2013-03-06 李洪泽 调桨长的万向风车
GB2495745A (en) * 2011-10-19 2013-04-24 Christopher John Coxon Wind or tidal flow turbine
WO2013102620A1 (fr) * 2012-01-06 2013-07-11 Stock Juergen Éolienne
ES2421521A1 (es) * 2012-03-01 2013-09-03 Crespo Pablo Leal Hidrogenerador
WO2013188456A1 (fr) * 2012-06-11 2013-12-19 Bluenergy Solarwind, Inc. Nouvelle aube de turbine et ensemble turbine
EP2998574A1 (fr) * 2014-09-16 2016-03-23 Giacani, Bruno Dispositif de transmission, en particulier pour pales d'éolienne
CN105863957A (zh) * 2016-05-17 2016-08-17 哈尔滨工业大学 一种可变桨距大功率垂直轴风力发电装置及气动启停控制方法
WO2017187229A1 (fr) * 2016-04-27 2017-11-02 Orlando Lozzi Rotor éolien à pales multiples à axe vertical ayant des pales inclinées à flux aérodynamiques se croisant mutuellement
EP3426915A4 (fr) * 2016-03-11 2019-03-27 Louis B. Gratzer Cycloturbine éolienne
WO2024085773A3 (fr) * 2022-10-20 2024-09-06 Felicianne As Convertisseur bidirectionnel d'énergie houlomotrice

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE300424C (fr) *

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE300424C (fr) *

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2495745A (en) * 2011-10-19 2013-04-24 Christopher John Coxon Wind or tidal flow turbine
WO2013102620A1 (fr) * 2012-01-06 2013-07-11 Stock Juergen Éolienne
ES2421521A1 (es) * 2012-03-01 2013-09-03 Crespo Pablo Leal Hidrogenerador
WO2013188456A1 (fr) * 2012-06-11 2013-12-19 Bluenergy Solarwind, Inc. Nouvelle aube de turbine et ensemble turbine
CN102953928A (zh) * 2012-10-17 2013-03-06 李洪泽 调桨长的万向风车
EP2998574A1 (fr) * 2014-09-16 2016-03-23 Giacani, Bruno Dispositif de transmission, en particulier pour pales d'éolienne
EP3426915A4 (fr) * 2016-03-11 2019-03-27 Louis B. Gratzer Cycloturbine éolienne
EP3885574A1 (fr) * 2016-03-11 2021-09-29 Louis B. Gratzer Cycloturbine éolienne
WO2017187229A1 (fr) * 2016-04-27 2017-11-02 Orlando Lozzi Rotor éolien à pales multiples à axe vertical ayant des pales inclinées à flux aérodynamiques se croisant mutuellement
CN105863957A (zh) * 2016-05-17 2016-08-17 哈尔滨工业大学 一种可变桨距大功率垂直轴风力发电装置及气动启停控制方法
CN105863957B (zh) * 2016-05-17 2019-01-08 哈尔滨工业大学 一种可变桨距大功率垂直轴风力发电装置及气动启停控制方法
WO2024085773A3 (fr) * 2022-10-20 2024-09-06 Felicianne As Convertisseur bidirectionnel d'énergie houlomotrice

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