WO2020161741A2 - Ensemble turbine à disque adaptable - Google Patents

Ensemble turbine à disque adaptable Download PDF

Info

Publication number
WO2020161741A2
WO2020161741A2 PCT/IN2020/050112 IN2020050112W WO2020161741A2 WO 2020161741 A2 WO2020161741 A2 WO 2020161741A2 IN 2020050112 W IN2020050112 W IN 2020050112W WO 2020161741 A2 WO2020161741 A2 WO 2020161741A2
Authority
WO
WIPO (PCT)
Prior art keywords
wind
central hub
disc
adaptable
blades
Prior art date
Application number
PCT/IN2020/050112
Other languages
English (en)
Other versions
WO2020161741A3 (fr
Inventor
Avinash Gupta
Raj OAK
Meet LAKHANI
Omkar BHOGALE
Original Assignee
Avinash Gupta
Raj OAK
Meet LAKHANI
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 Avinash Gupta, Raj OAK, Meet LAKHANI filed Critical Avinash Gupta
Publication of WO2020161741A2 publication Critical patent/WO2020161741A2/fr
Publication of WO2020161741A3 publication Critical patent/WO2020161741A3/fr

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
    • F03D1/0633—Rotors characterised by their aerodynamic shape of the blades
    • 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
    • F05B2250/10—Geometry two-dimensional
    • F05B2250/14—Geometry two-dimensional elliptical
    • F05B2250/141—Geometry two-dimensional elliptical circular
    • 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
    • F05B2250/70—Shape
    • F05B2250/71—Shape curved
    • F05B2250/712—Shape curved concave
    • 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
    • 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 the field of renewable energy.
  • this invention relates to wind energy and hybrid energy generating systems.
  • this invention relates to an adaptable disc turbine assembly.
  • the first known wind turbines were produced around 20th century for production of electrical energy. They were first built in Scotland with the help of cloth fibre and accumulators were used to store electrical energy in chemical form; which was later used for lightning process.
  • A‘wind belt’ is a wind power harvesting device invented by Shawn Frayn for converting wind power to electricity. It consists of a flexible polymer ribbon stretched between supports along the wind direction, with magnets attached to it at its end section. When wind flows across it, the ribbon vibrates due to aero-elastic flutter. The vibrating movement of the magnets induces current in nearby pickup coils by electromagnetic induction.
  • the inventor was inspired by noticing the movement of spectacular Tacoma Narrow bridge collapse in 1940.
  • the bridge collapsed due to a destructive phenomenon called aero-elastic flutter.
  • aero-elastic flutter As the speed of wind increases, there may be a point at which the structural damping is insufficient to damp out the motions which are increasing due to aerodynamic energy being added to the structure. This vibration can cause structural failure and therefore, considering flutter characteristics is an essential part of designing any structure.
  • This is the phenomenon that is being used in the Wind Belt for causing oscillatory motion of the band which has magnets attached at the corners and thus inducing an electric current in the coil placed nearby.
  • a key component of this design is a taut membrane of Mylar coated taffeta, which vibrates as the wind flows over it, triggered by air flow. This up and down movement is caused by the variation of wind flow above and below the foil, which also causes vertices to form and keep the membrane oscillating.
  • Another prior art turbine is a Vortex Wind Turbine.
  • a Spanish startup‘Vortex Bladeless’ has developed turbines that harness vortices, the spinning motion of air or other fluids. When wind passes one of the cylindrical turbines, it shears off the downwind side of the cylinder in a spinning whirlpool or vortex. That vortex then exerts a force on the cylinder, causing it to vibrate. The kinetic energy of the oscillating cylinder is converted to electricity through a linear generator.
  • the linear generator consists of an oscillating member which is attached to a rack and pinion mechanism to convert oscillatory motion into circular motion of the pinion which is then coupled with a generator to produce electricity.
  • Another prior art turbine is a Hummingbird Wind Turbine.
  • the turbine is equipped with a pair of flapping wings that are over five feet long and move in a figure-eight motion— just as a hummingbird flaps its wings while hovering.
  • the design allows the turbines to generate energy on both the upstroke and the down stroke.
  • the firm designed the wings to capture energy from the wind and send it to a spinning axle inside the turbine housing, which serves as the moving agent in the turbine. It is different from other wind turbines, as it converts linear motion into a circular motion or figure-eight pattern.
  • the firm currently has a test turbine installed in a remote area and is capable of producing lkW of power.
  • the wings were designed using carbon fiber and are each 5.25 feet long— flapping together takes up about 12 square feet of space. It also produces less noise pollution and could possibly be less hazardous for birds, as they may even mistake it for another bird.
  • test turbine is not generating as much energy as a similarly sized wind turbine should and research is still going on for improving the design.
  • wind from any direction can be captured and then using a specific structure, it can increase speed of the captured wind and then direct it towards a conventional wind turbine.
  • Wind is captured at the top of the funnel shaped INVELOX system.
  • the omni-directional intake area allows wind collection from any direction then, the wind is funneled through the system which concentrates and further accelerates in a chamber of decreasing and then uniformly increasing area using the Venturi effect.
  • the Venturi effect is a phenomenon that occurs when a fluid that is flowing through a pipe is forced through a narrow section, resulting in a pressure decrease and a velocity increase.
  • Wind is delivered to turbine / generators to convert the accelerated wind to electrical power.
  • INVELOX is the first single wind tower capable of powering multiple turbines in a row or series. A diffuser section returns wind to nature. Sheer Wind’s INVELOX is a solution that utilizes current wind power turbines and rotors but brings them to ground level for easier, safer, and cheaper operation and maintenance. Multiple turbines can be used in a row or series increasing output exponentially for each tower.
  • the Saphonian turbine implements a patented system called“Zero-Blade Technology” in order to harness the wind’s energy. This is said to involve channeling the wind in a back and forth motion, until it is converted into mechanical energy using pistons.
  • the pistons then produce hydraulic pressure, which can be instantly converted to electricity via a hydraulic motor and a generator, or stored in a hydraulic accumulator.
  • This concept proposes to use similar technology as fans in a wind turbine in which the turbine is held at the base of windmill housing and is encapsulated except for slits that allow it to expel air.
  • Air entering the annular ring at the top of the windmill is collected into the stem of the windmill and forced down to turn the turbine which powers a generator.
  • the Dyson airfoil technology may be used to accelerate the air into the stem housing of the windmill by directing the air around airfoils such that additional air and pressure can be directed to the turbine to enhance its operation.
  • the annular ring contains no spinning blades and will be safe for birds to fly though.
  • the windmill can be developed for use wherever windmills are used. Initially, smaller windmills might have the annular ring made of composite materials. Larger bladeless windmills can be made of bolted plates.
  • the amount of air that is being trapped is only limited to the area of the rim from where the wind is accumulated.
  • the diameter of the cylindrical section will be equal to the blade diameter and hence the amount of space consumed will be relatively more.
  • the present invention is provided with a disc system to regulate flow of air to turbines so it becomes more efficient.
  • Yet another object of the present invention is to provide an alternate system to present blades of the windmill.
  • Still another object the present invention is to provide specially designed discs for windmill for capturing the wind power in a completely different way and produce maximum power.
  • An additional object of the present invention is to provide an adaptable disc system for wind mill which is based on maximum interception of wind and not the flow concept as per the conventional design.
  • Still an additional object of the present invention is to provide alternative to blades of the present wind mill with a disc system which adapts to real time wind conditions.
  • Yet another additional object of the present invention is to provide a disc system, for wind-based electricity generation, which has the ability to intercept low speed wind from a mountain plateau or a sea coast.
  • an adaptable disc turbine assembly comprising:
  • disc shaped concave blades configured to harness / capture wind energy and, whilst harnessing, converting kinetic energy of the wind into rotational energy by angular displacement of a connected turbine by virtue of movement of said blades, with respect to a central hub and, finally, into electrical energy;
  • said central hub mounted on a central shaft, configured to be connected to said disc shaped concave blades by means of a mounting structure, said central hub being angularly displaceable along with said discs as wind blows, thereby, producing a lift force on said blades, a tangential component of said lift force in the direction of angular displacement being responsible for producing torque required for generating said electrical energy;
  • a Mounting Structure per blade, configured to connect said corresponding blade to said central hub, said mounting structure being configured to ensure that each disc is at a pre-defined angle with respect to a central axis, said central axis being an operative horizontal axis passing through a centre of said central hub.
  • said blade is a conical disc.
  • said blade is a disc with a shape configured to offer high value of drag coefficient which offers high starting torque when exposed to wind.
  • each of said blades in said assembly being of equal diameter.
  • each of these blades is mounted on an angularly displaceable central hub), located on a shaft of a generator unit.
  • the central point of each blade is equidistant from said central hub.
  • a generator unit being connected to said central hub so that it can harness said rotational energy to convert to said electrical energy.
  • each of said blades being attached to its corresponding mounting structure at a pre-defined angle with respect to a central axis, said central axis being an operative horizontal axis passing through a centre of said central hub, said pre-defined angle ranging from 0 degrees to 45 degrees.
  • said mounting structure is an adaptable connecting element in which angle of connection between said blade and said central hub changes depending on force of wind, said change of angle of said disc being with respect to said central axis, in correlation with increasing upwind force, thereby making said disc turbine adaptable to varying wind speed conditions due to the virtue of the geometry and material selection offering appropriate torsional resistance thus facilitating the change of the angle of the disk with the central axis with increasing upwind force making the turbine adaptable to varying wind speed conditions.
  • said central hub assembly comprising a pitch-angle variation mechanism to facilitate variation in pitch angle.
  • said central hub assembly comprising a pitch-angle variation mechanism to facilitate variation in pitch angle, characterised in that, said pitch-angle variation mechanism consisting of:
  • At least two L-section mountings such that the centre of a first L-section mounting is attached with a first rod of first diameter‘x’ and a centre of a second L-section mounting is attached with a second rod of second diameter‘y’, with said second diameter being greater that said first diameter and said first rod being telescopically inside said second rod and can rotate easily having rolling fit;
  • said central hub comprising three flange joints, at 120 degrees apart, said joints being configured to support said mounting structure which connects said central hub with each of said blades.
  • said central hub comprising three flange joints, at 120 degrees apart, said joints being configured to support said mounting structure which connects said central hub with each of said blades, characterised in that, said mounting structure being configured to restrict to and fro motion of shaft but allow it to rotate up to (0-45) degree angles as force is applied for adjusting said blade angle.
  • said assembly comprising a tail fin assembly to drive a yaw mechanism, said tail fin assembly comprising a pair of fin-shaped blades located laterally and spaced apart from said central hub at a predefined angle with respect to central axis.
  • FIGURE 1 illustrates a view of a blade along with its mounting structure, of the adaptable disc wind turbine assembly
  • FIGURES 2, 3, 4, and 5 illustrate various views of the Adaptable disc wind turbine assembly
  • FIGURE 6a, 6b, 6c, and 6d illustrate various views of the pitch-angle variation mechanism
  • FIGURE 7 illustrates a graph of Wind Speeds Increase with respect to Height.
  • an adaptable disc turbine assembly there is provided an adaptable disc turbine assembly.
  • an assembly for wind energy generation is provided with an improved design of blades / discs (A), the blades / discs being configured to harness / capture wind energy and, whilst harnessing, converting kinetic energy of the wind into rotational energy by angular displacement of a turbine by virtue of movement of the blades / disc and, finally, into electrical energy.
  • FIGURE 1 illustrates a view of the blade / disc (A), along with its mounting structure, of the adaptable disc wind turbine assembly.
  • each blade, of this assembly is a disc.
  • the shape of this disc may be conical, concave, or the like shapes. Such shapes offer high value of lift coefficient which offers high starting torque when exposed to wind.
  • each of the discs used in this assembly may have diameters equal to each other.
  • FIGURES 2, 3, and 4 illustrate various views of the adaptable disc wind turbine assembly.
  • each of these blades (A) is mounted on an angularly displaceable central hub (B), located on a shaft of a generator unit (D).
  • the central point of each blade may be equidistant from the central hub (B).
  • the central hub (B) starts angularly displacing along with the discs (A) as wind blows; which produces a lift force on the discs (A), a tangential component of the force in the direction of angular displacement is responsible for producing the necessary torque.
  • a turbine is connected to the central hub (B) so that it can harness the rotational energy to convert to electrical energy.
  • this turbine may be located in the generator unit (D).
  • the turbine works on‘Drag/Thrust concept’ but is not subjected to limitations of a drag turbine like Savonius turbine where the blades / discs cannot move faster than the speed of the wind since the movement of the blades / discs is in perpendicular direction to the wind and not in the same direction of the wind.
  • the rotational mechanical energy from the central hub (B) can be used to generate electrical power by coupling with a generator or directly used for pumping fluids like water (not shown in the diagram).
  • a Mounting Structure (C) which is configured to connect a disc (A) to the central hub (B).
  • the Mounting Structure (C) ensures that the each disc (A) is at a pre-defmed angle (F) with respect to a central axis (X-X), central axis being an operative horizontal axis passing through the centre of the central hub (B) located on a generator (D).
  • the value of this angle (F) determines speed (RPM - Rotations per Minute), of the turbine, and the resultant torque acting on a central shaft of the generator (D) attached to the centre of the central hub (B)
  • Each disc (A) is attached to its corresponding Mounting Structure (C) at a pre defined angle ranging from 0 degrees to 45 degrees.
  • the Mounting Structure is an adaptable connecting element in which the angle of connection changes depending on force of wind.
  • the Mounting Structure allows for such change in angle between the disc (A) and its corresponding connector element (C); thereby, incorporating adaptability to wind conditions in order to provide maximum torque.
  • the angle (F) would be maximum (45 Degrees) to ensure maximum power output at the rated RPM.
  • the angle (F) would be adjusted using a variable pitch mechanism / Torsion Bar principle to limit the RPM, thus protecting the turbine from possible damages.
  • the central hub (B) assembly may encompass a pitch-angle variation mechanism to facilitate the variation in the pitch angle. Then, at 120 degrees apart, three flange joints would be mounted to support the Mounting Structure (C) which would connect the central hub (B) with each of the three discs (A). These mountings would be such that it would restrict to and fro motion of the shaft but allow it to rotate up to (0-45) degree angles as force is applied for adjusting the disc angle.
  • FIGURE 6a, 6b, 6c, and 6d illustrate various views of the pitch-angle variation mechanism.
  • the pitch-angle variation mechanism consists of two L-section mountings (J and H).
  • the centre of a first L-section mounting (J) is attached with a rod of diameter‘x’ (first rod M) and the centre of a second L- section mounting (K) is attached with rod of diameter‘y’ (second rod N), such that y > x and rod M can enter rod N (telescopically) and can rotate easily having rolling fit.
  • the two ends of the L-sections (J and H) are connected with two torsion bars (L and K) which are steel / composite rods having appropriate torsional stiffness.
  • a tail fin assembly (E) is used to drive a yaw mechanism. This ensures that the wind turbine continuously orients along the direction of wind.
  • the tail fin assembly (E) comprises a pair of fin- shaped blades located laterally and spaced apart from the generator (D).
  • the tail fin assembly (E) derives support from a support platform which also supports / houses the generator (D).
  • electrical systems including generator, capacitor, split ring commutator, rectifier, inverter, and battery enables power production and storage facilities.
  • a prior art turbine assembly was used to compete with the turbine assembly of this invention.
  • a horizontal fan was placed, as a source, for generating actual wind conditions; keeping both the turbines to be tested at a fixed distance of 7 meters from the fan to simulate natural conditions of about 13.4 miles/hour wind speed (at the source of the fan) - noting the reading connected on a voltmeter connected to determine the preliminary results.
  • the prior art turbine was made out of the same material as the disc turbine, of this invention, and was given a slight air foil section.
  • the normal turbine was made 22.5 inches long calculating the hub centre to the blade tip.
  • the disc turbine, of this invention was 18 inches long from centre to tip.
  • the output voltage obtained from the disc turbine, of this invention was around 14 volts with a maximum of 17 volts and that for the prior art turbine was around 6 volts and a maximum of 7.1 volts.
  • This experiment provided proof concept that the current invention’s design was producing more than twice the amount of power along with being more compact than prior art designs and assemblies; thereby, producing more output power with minimum space consumption which is today’s need.
  • each disc blade is considered to be 1 metre
  • the angle G (Slant Angle) of each disc is 15 degrees 3.
  • the pitch angle (F) is taken as 30-45 degrees (since the turbine is adaptable, the angle will vary according to the wind conditions)
  • Rotational speed is considered as 60 RPM
  • the formula for calculating the power from a wind turbine is:
  • Wind-Power-calculation (P) kCpl/2pAV A 3
  • the rotor swept area, A is important because the rotor is the part of the turbine that captures the wind energy. So, the larger the rotor, the more energy it can capture.
  • the air density, p changes slightly with air temperature and with elevation. The ratings for wind turbines are based on standard conditions of 59° F (15° C) at sea level. A density correction should be made for higher elevations as shown in the Air Density Change with Elevation graph. A correction for temperature is typically not needed for predicting the long-term performance of a wind turbine.
  • the prior art airfoil blade design has a very distinctive humming noise that is created due to the blade cutting through the wind.
  • the turbine is capable of emitting humming sounds of low frequency caused by the blades. Even the internal components like gears and generators can create noise that is disturbing.
  • the turbine noise can reach up to 43 decibels. This sound can be quite disturbing especially in areas where there is less population.
  • This noise is completely eliminated in the current invention’s disc design.
  • There is low slicing through the air, and the discs use drag force to generate torque, thus there is less relative movement of the air across the disc resulting in silent operation of the turbine. This is especially useful in cities and highly populated areas since there is no noise disturbance caused by the turbine. It is a very useful feature at night when it will not cause any inconvenience due to noise.
  • the following paragraph discusses comparison of the current invention with prior art in respect of lesser space requirements:
  • the prior art airfoil blade wind turbines have very long blades that span a distance of over 100 to 150m. Thus, a tri-bladed turbine will have a total center to tip distance of more than 110m. This makes the transportation and assembly of the turbine on-site very hazardous and challenging.
  • the disc wind turbine, of the current invention is much more compact and the centre-to-tip distance is much lesser as compared to prior art wind turbines.
  • the compact size makes it easy to transport and assemble.
  • the bladeless turbine, of this invention also produces more power than the traditional wind turbine in- spite of being smaller in size.
  • the compact size makes it possible to install in highly populated locations. The smaller size reduces the manufacturing cost.
  • the prior art wind turbines are enormous in size and weight, making them difficult to transport and assemble.
  • the height of the turbine, of this invention can be more than 120m and the blades can be over 100m long.
  • heavy machinery is required for transportation and installation of these turbines.
  • the risk factor is very high and any accident can lead to heavy loss.
  • the disc wind turbine, of this invention is very compact and thus easier to transport and install.
  • the size and weight of the discs is less and thus it can be easily installed at any location.
  • the equipment required for the installation does not consist of heavy machinery thus making installation quick and easy. According to a non-limiting exemplary embodiment, the following paragraph discusses comparison of the current invention with prior art in respect of lesser maintenance:
  • the large airfoil wind turbines need frequent maintenance owing to its large size and complex internal structure.
  • the airfoil cross section of the turbine needs to be uniform throughout the length of the blade, but due to changing weather conditions the wear and tear of the blade occurs, causing lesser efficiency and thus higher cost of maintenance.
  • the disc wind turbine, of the current invention has a comparatively smaller structure.
  • the maintenance cost reduces greatly since the internal structure and design is less complicated thus making its timely maintenance easy and cost effective.
  • the materials used can withstand any weather and don’t require heavy regular maintenance. This reduces the operating cost of the turbine significantly.
  • the material used in traditional wind turbines is usually glass fibre, due to its light weight.
  • the disc turbine, of this invention has similar glass fibre materials used along with steel or aluminium canopy frame.
  • the glass fibre is covered over the frame that is the wing capturing surface.
  • the metal frame gives it more strength and the glass fibre being light weight helps in effectively maintaining a compact structure.
  • the glass fibre used is synthetic; thus, reducing cost of the turbine and making it easier to manufacture. According to a non-limiting exemplary embodiment, the following paragraph discusses comparison of the current invention with prior art in respect of adaptability of mechanism:
  • the adaptable mechanism implemented in the disc turbine, of this invention is unique and can be implemented even in prior art wind turbines. This is the technique which we have developed and it gives turbine the name adaptable disc wind turbine.
  • An ideal turbine should provide almost constant power output in variable wind speeds and also offer a control over the turbine speed in case of emergency or high wind conditions. This control over the speed could be effectively achieved by changing the blade angle with respect to the central shaft. When the winds are having a lower velocity the angle of all the blades could be increased due to which greater tangential forces would develop. When the wind speeds are very high, this angle will be reduced due to which a smaller component of tangential force would be generated and hence the speed of the turbine would decrease.

Abstract

La présente invention concerne un ensemble turbine à disque adaptable qui comprend : des pales concaves discoïdes (A) conçues pour guider le vent par déplacement angulaire d'une turbine reliée grâce au mouvement desdites pales (A), par rapport à un moyeu central (B); ledit moyeu central (B), monté sur un arbre central, conçu pour être relié auxdites lames concaves discoïdes (A) au moyen d'une structure de montage (C), ledit moyeu central (B) pouvant se déplacer selon un angle avec lesdits disques (A) lorsque le vent souffle; et une structure de montage (C), par lame (A), conçue pour relier ladite lame correspondante (A) audit moyeu central (B), ladite structure de montage (C) étant conçue pour assurer que chaque disque (A) est à un angle prédéfini (F) par rapport à un axe central (XX), ledit axe central étant un axe horizontal opérationnel passant par le centre dudit moyeu central (B).
PCT/IN2020/050112 2019-02-04 2020-02-04 Ensemble turbine à disque adaptable WO2020161741A2 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IN201921004276 2019-02-04
IN201921004276 2019-02-04

Publications (2)

Publication Number Publication Date
WO2020161741A2 true WO2020161741A2 (fr) 2020-08-13
WO2020161741A3 WO2020161741A3 (fr) 2020-09-17

Family

ID=71948089

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/IN2020/050112 WO2020161741A2 (fr) 2019-02-04 2020-02-04 Ensemble turbine à disque adaptable

Country Status (1)

Country Link
WO (1) WO2020161741A2 (fr)

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20130149161A1 (en) * 2011-12-07 2013-06-13 Steve B. LaCasse Conical wind turbine
DE202012009791U1 (de) * 2012-10-15 2012-11-26 Harry Plöhn Windenergieanlage mit bestimmten geometrischen, ovalen Halbkugeln und spezieller Oberfläche der ovalen Halbkugeln

Also Published As

Publication number Publication date
WO2020161741A3 (fr) 2020-09-17

Similar Documents

Publication Publication Date Title
US7802967B2 (en) Vertical axis self-breaking wind turbine
EP2561222B1 (fr) Eolienne à axe vertical
US6465899B2 (en) Omni-directional vertical-axis wind turbine
Ragheb Vertical axis wind turbines
RU2268396C2 (ru) Способ и устройство для генерирования электрической энергии путем преобразования энергии уплотненного воздушного потока
JP4954066B2 (ja) 風力エネルギー抽出システム
Schubel et al. Wind turbine blade design review
US20060113804A1 (en) Passively cooled direct drive wind turbine
US20070258806A1 (en) Helical taper induced vortical flow turbine
JP2008506877A5 (fr)
Kentfield Fundamentals/wind-driven water
US8148841B1 (en) Modular wind turbine system
Hossain et al. Design and development of a 1/3 scale vertical axis wind turbine for electrical power generation
RU2382233C2 (ru) Ветряной двигатель с вертикальной осью вращения
WO2008088921A2 (fr) Éoliennes verticales et procédés d'actionnement de celles-ci
Chong et al. Urban Eco-Greenergy™ hybrid wind-solar photovoltaic energy system and its applications
WO2020161741A2 (fr) Ensemble turbine à disque adaptable
Sarathi et al. Study on Wind Turbine and Its Aerodynamic Performance
WO2015155782A1 (fr) Éolienne à axe vertical
Khan et al. Review Paper on Wind Turbine
RU61362U1 (ru) Ветроэнергетическая установка ковалева
US20210348595A1 (en) Fluid turbine
Branney A critical evaluation of wind turbine technology, leading to the development of 20mw multi rotor systems
Arun DESIGN AND FABRICATION OF VERTICAL AXIS WIND MILL POWER GENERATION
Sampath et al. Estimation of power in low velocity vertical axis wind turbine

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: 20753209

Country of ref document: EP

Kind code of ref document: A2

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 20753209

Country of ref document: EP

Kind code of ref document: A2