WO2022099353A1 - Vertical axis wind turbine with s-shaped blades - Google Patents
Vertical axis wind turbine with s-shaped blades Download PDFInfo
- Publication number
- WO2022099353A1 WO2022099353A1 PCT/AU2021/051308 AU2021051308W WO2022099353A1 WO 2022099353 A1 WO2022099353 A1 WO 2022099353A1 AU 2021051308 W AU2021051308 W AU 2021051308W WO 2022099353 A1 WO2022099353 A1 WO 2022099353A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- rotor
- blade
- wind turbine
- blades
- intermediate portion
- Prior art date
Links
- 230000003014 reinforcing effect Effects 0.000 description 2
- 229930091051 Arenine Natural products 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- RLQJEEJISHYWON-UHFFFAOYSA-N flonicamid Chemical compound FC(F)(F)C1=CC=NC=C1C(=O)NCC#N RLQJEEJISHYWON-UHFFFAOYSA-N 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Classifications
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- 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
- 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
- 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
-
- 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
- F03D3/064—Fixing wind engaging parts to rest of 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
- F05B2240/00—Components
- F05B2240/20—Rotors
- F05B2240/21—Rotors for wind turbines
- F05B2240/211—Rotors for wind turbines with vertical axis
- F05B2240/213—Rotors for wind turbines with vertical axis of the Savonius type
-
- 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
- Y02E10/74—Wind turbines with rotation axis perpendicular to the wind direction
Definitions
- the present invention relates to vertical axis wind turbines.
- Vertical axis wind turbines (more broadly defined as wind turbines having an axis which is transverse relative to wind direction) fall into two types: those relying on drag such as Savonius rotors and those relying on lift such as Darrieus rotors.
- Savonius rotors and similar designs have curved blades extending outwardly from a central axle.
- the curved blades have uniform concavity; that is, they have a concave side arranged to ‘catch’ wind and a convex side arranged to move into the wind.
- the drag on the concave side is significantly higher than on the convex side, and this differential in drag causes the rotor to spin under the action of wind.
- the present invention seeks to provide a drag-style vertical axis wind turbine which addresses some of these concerns, at least in part.
- a rotor for a wind turbine having a plurality of blades, each blade having a width in a generally radial direction, each blade being curved along at least part of its width, each blade having an outer end, a concave outer portion, an intermediate portion, a convex inner portion, and an inner end, wherein the intermediate portion is located between the concave outer portion and the concave inner portion; the inner end of each blade being fixed to the intermediate portion of an adjacent blade.
- the intermediate portion may be straight.
- the intermediate portion may be concave or convex.
- the intermediate portion may act as an extension of the concave outer portion or of the convex inner portion.
- Each blade may include a straight innermost portion extending between the inner end and the convex inner portion.
- the straight innermost portion of one blade is preferably oriented at about 90° relative to the intermediate portion of the adjacent blade to which it is fixed.
- each blade preferably curves through about 130°; that is, the initial straight portion and the intermediate straight portion of a blade are preferably oriented at about 130° relative to each other.
- the concave outer portion preferably curves through about 90°.
- the convex inner portions and innermost portions of the plurality of blades combine to form a closed curve around an axle of the rotor. It is preferred that an average radius of the closed curve is about half of a radius of the rotor.
- the closed curve shields the axle of the rotor from the wind.
- the convex side of the convex inner portions are similarly shielded from the wind.
- the creation of the closed curve provides the rotor with significant rigidity.
- the construction results in significant noise reduction when compared with many prior art turbines.
- the S-shaped blades extend across an axle of the turbine, thus acting as two simple concave blades. Examples of this arrangement include Korean patent publication number 101 ,001 ,812; US patent number 9,494,136; and US patent application number 20120235418.
- the S-shaped blade is located on one radial side of an axle, with the convex portion arranged to deflect wind either into the concave portion or else to another blade.
- this arrangement include those of US Patent number 1 ,367,766 and international publication numbers WO 2012/082953 and WO 2019/172792.
- Figure 1 is a first perspective of a rotor for a wind turbine in accordance with the present invention
- Figure 2 is a second perspective of the rotor of Figure 1 ;
- Figure 3 is a cross section through a first embodiment of a rotor for a wind turbine in accordance with the present invention
- Figure 4 is a cross section through a second embodiment of a rotor for a wind turbine in accordance with the present invention
- Figure 5 is a side view of the rotor of Figure 3;
- Figure 6 is a side view of the rotor of Figure 4.
- Figure 7 is a base plate from within the rotor of Figure 3;
- Figure 8 is a base plate from within the rotor of Figure 4.
- Figure 9 is a perspective of a turbine comprising three of the rotors of Figure 3 axially aligned;
- Figure 10 is a side cross section of the turbine of Figure 9;
- Figure 11 is a perspective of a turbine comprising three of the rotors of Figure 4 axially aligned;
- Figure 12 is a side cross section of the turbine of Figure 11 .
- Figures 1 and 2 show a rotor 10 comprised of a plurality of blades 12. In the embodiment of the drawings there are nine blades 12.
- Each blade 12 has a “windward” side 14 and a “leeward” side 16.
- Each blade 12 is broadly “S” shaped. In other words, each blade 12 has a concave outer portion 18 and a convex inner portion 20 when viewed from the windward side 14.
- the blade 12 has an inner end 22 and an outer end 24.
- the blade 12 has an initial straight portion 26 which extends from the inner end 22.
- the blade then has a first curved portion 28 which curves through about 130° towards the leeward side 16.
- the initial straight portion 26 and the first curved portion 28 combine to form the convex inner portion 20.
- the length of the initial straight portion 26 is similar to the arc length of the first curved portion 28.
- An intermediate straight portion 30 extends tangentially away from the first curved portion 28. It will be appreciated that the intermediate straight portion 30 is angled at 130° with respect to the initial straight portion 26.
- the intermediate straight portion 30 has a length about twice that of the initial straight portion 26.
- a second curved portion 32 curves through about 90° towards the windward side 14 to form the concave outer portion 18.
- the second curved portion 32 terminates at the outer end 24.
- the radius of curvature of the second curved portion 32 is similar to that of the first curved portion 28.
- the blades 12 are fixed to each other by suitable means such as bolting or welding.
- the arrangement is such that the inner end 22 of one blade 12 is fixed to the intermediate straight portion 30 of an adjacent blade 12 at an angle of 90°, forming a join 34.
- the initial straight portion 26 of the blade 12 forms an angle of about 140° relative to the initial straight portion 26 of the adjacent blade 12.
- the convex inner portions 20 combine to form a closed curve 36.
- the closed curve 36 has a varying radius, with the joins 34 representing the maximum radius and the junctions of the initial straight portions 26 and first curved portions 28 representing the minimum radius.
- the average radius of the closed curve is about half the radius of the rotor 10; that is the distance from a central axis to the outer ends 24 of the blades 12.
- the blades 12 are arranged to be fixed together as described above and then mounted onto a base plate 40 as seen in Figure 7 or a base plate 50 as seen in Figure 8.
- the base plate 40 is circular, having a central protruding cylinder 42.
- a plurality of reinforcing blades 44 extend between the central protruding cylinder 42 and an upper surface of the base plate 40.
- the base plate 40 has mounting points 46 spaced around its circumference, arranged to receive joins 34.
- the base plate 40 has connection points 48 spaced around an inner circumference of the central protruding cylinder 42.
- the base plate 50 is circular, having a central axle 52.
- a plurality of reinforcing blades 54 extend between the central axle 52 and an upper surface of the base plate 50.
- the base plate 50 has mounting points 56 spaced around its circumference, arranged to receive joins 34.
- Wind forces are concentrated at the joins 34, driving the rotor 10.
- the closed curve acts as a monocoque structure, adding significant rigidity to the rotor 10.
- the connection of blades 12 at a radially spaced location from the central protruding cylinder 42 or central axle 52 dramatically reduces the applied shear forces when compared to traditional Savonius rotors.
- a number of rotors 10 can be mounted along a single axis in a generally modular fashion as shown in Figures 9 to 12 to form a turbine.
- a lowermost base plate 60 can be mounted beneath the rotor 10 as shown in Figures 9 and 10.
- the central protruding cylinder 42 of the lowermost base plate 60 is arranged to act as an outer rotor generator, with a stator positioned within the central protruding cylinder 42 and arranged to generate electrical power.
- the lowermost base plate 60 can be directly attached to a bespoke generator.
- a lowermost base plate 62 can be mounted beneath the rotor 10 as shown in Figures 11 and 12.
- the central axle 52 of the lowermost base plate 62 is arranged to act as an inner rotor generator, with a stator positioned outside the central axle 52 and arranged to generate electrical power.
- the lowermost base plate 62 can be directly attached to a bespoke generator
Landscapes
- 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)
- Toys (AREA)
Abstract
Description
Claims
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AU2021378821A AU2021378821A1 (en) | 2020-11-10 | 2021-11-05 | Vertical axis wind turbine with s-shaped blades |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AU2020904105A AU2020904105A0 (en) | 2020-11-10 | Vertical axis wind turbine | |
AU2020904105 | 2020-11-10 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2022099353A1 true WO2022099353A1 (en) | 2022-05-19 |
Family
ID=81600693
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/AU2021/051308 WO2022099353A1 (en) | 2020-11-10 | 2021-11-05 | Vertical axis wind turbine with s-shaped blades |
Country Status (2)
Country | Link |
---|---|
AU (1) | AU2021378821A1 (en) |
WO (1) | WO2022099353A1 (en) |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
ES1036758U (en) * | 1997-03-20 | 1997-11-01 | Martinez Fernandez Jose Antoni | Rubella perfected. (Machine-translation by Google Translate, not legally binding) |
US20110027087A1 (en) * | 2007-08-08 | 2011-02-03 | Art Turbine Inc. | Transverse-Axis Turbine With Twisted Foils |
ES2373597A1 (en) * | 2009-12-24 | 2012-02-07 | Ramón Crosas Capdevila | Vertical wind turbine device. (Machine-translation by Google Translate, not legally binding) |
WO2012082953A2 (en) * | 2010-12-14 | 2012-06-21 | Cesare Selmi | Multi-rotor vertical axis wind turbine and methods related thereto |
US20120235418A1 (en) * | 2011-03-17 | 2012-09-20 | Via Verde Limited | Wind turbine apparatus |
US9494136B1 (en) * | 2013-09-06 | 2016-11-15 | Daniel Edmiston | Reflex camber surfaces for turbines |
-
2021
- 2021-11-05 AU AU2021378821A patent/AU2021378821A1/en active Pending
- 2021-11-05 WO PCT/AU2021/051308 patent/WO2022099353A1/en active Application Filing
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
ES1036758U (en) * | 1997-03-20 | 1997-11-01 | Martinez Fernandez Jose Antoni | Rubella perfected. (Machine-translation by Google Translate, not legally binding) |
US20110027087A1 (en) * | 2007-08-08 | 2011-02-03 | Art Turbine Inc. | Transverse-Axis Turbine With Twisted Foils |
ES2373597A1 (en) * | 2009-12-24 | 2012-02-07 | Ramón Crosas Capdevila | Vertical wind turbine device. (Machine-translation by Google Translate, not legally binding) |
WO2012082953A2 (en) * | 2010-12-14 | 2012-06-21 | Cesare Selmi | Multi-rotor vertical axis wind turbine and methods related thereto |
US20120235418A1 (en) * | 2011-03-17 | 2012-09-20 | Via Verde Limited | Wind turbine apparatus |
US9494136B1 (en) * | 2013-09-06 | 2016-11-15 | Daniel Edmiston | Reflex camber surfaces for turbines |
Also Published As
Publication number | Publication date |
---|---|
AU2021378821A1 (en) | 2023-06-29 |
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