GB2049066A - Apparatus for generating energy - Google Patents

Apparatus for generating energy Download PDF

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Publication number
GB2049066A
GB2049066A GB7915956A GB7915956A GB2049066A GB 2049066 A GB2049066 A GB 2049066A GB 7915956 A GB7915956 A GB 7915956A GB 7915956 A GB7915956 A GB 7915956A GB 2049066 A GB2049066 A GB 2049066A
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United Kingdom
Prior art keywords
rotor
housing
blades
rotation
air streams
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.)
Withdrawn
Application number
GB7915956A
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Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to GB7915956A priority Critical patent/GB2049066A/en
Publication of GB2049066A publication Critical patent/GB2049066A/en
Withdrawn legal-status Critical Current

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Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F03MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
    • F03DWIND MOTORS
    • F03D3/00Wind motors with rotation axis substantially perpendicular to the air flow entering the rotor 
    • F03D3/04Wind motors with rotation axis substantially perpendicular to the air flow entering the rotor  having stationary wind-guiding means, e.g. with shrouds or channels
    • F03D3/0409Wind motors with rotation axis substantially perpendicular to the air flow entering the rotor  having stationary wind-guiding means, e.g. with shrouds or channels surrounding the rotor
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F03MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
    • F03DWIND MOTORS
    • F03D3/00Wind motors with rotation axis substantially perpendicular to the air flow entering the rotor 
    • F03D3/04Wind motors with rotation axis substantially perpendicular to the air flow entering the rotor  having stationary wind-guiding means, e.g. with shrouds or channels
    • F03D3/0427Wind motors with rotation axis substantially perpendicular to the air flow entering the rotor  having stationary wind-guiding means, e.g. with shrouds or channels with converging inlets, i.e. the guiding means intercepting an area greater than the effective rotor area
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F03MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
    • F03DWIND MOTORS
    • F03D15/00Transmission of mechanical power
    • F03D15/10Transmission of mechanical power using gearing not limited to rotary motion, e.g. with oscillating or reciprocating members
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F03MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
    • F03DWIND MOTORS
    • F03D80/00Details, components or accessories not provided for in groups F03D1/00 - F03D17/00
    • F03D80/70Bearing or lubricating arrangements
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F03MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
    • F03DWIND MOTORS
    • F03D9/00Adaptations of wind motors for special use; Combinations of wind motors with apparatus driven thereby; Wind motors specially adapted for installation in particular locations
    • F03D9/20Wind motors characterised by the driven apparatus
    • F03D9/25Wind motors characterised by the driven apparatus the apparatus being an electrical generator
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00Energy generation through renewable energy sources
    • Y02E10/70Wind energy
    • Y02E10/74Wind turbines with rotation axis perpendicular to the wind direction

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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)
  • Wind Motors (AREA)

Abstract

In a wind generator, a stack of shaped pates 5 is arranged around the rotor 3 which has blades 41 of aerofoil section, and the plates 5 define tapering apertures 7 which reliably lead the wind from any direction onto the rotor blades 41 and cause unidirectional rotation of the rotor 3. <IMAGE>

Description

SPECIFICATION Apparatus for generating energy The invention relates to an apparatus for converting fluid flow to rotational energy, especially for use in wind generation of mechanical energy. The invention relates also to an electrical energy generation system which comprises such an apparatus and means for conversion to electrical energy of mechanical energy generated in use of such apparatus.
Apparatus for the wind generation of mechanical energy have been known and used in the past, a particular example of such apparatus being known as an aerogenerator. Known apparatus are, however, subject to disadvantages which lead to inefficiency, and in particular known apparatus are inefficient in conditions of rapidly changing wind direction which is a commonly experienced circumstance.
According to the invention, there is provided an apparatus for use in wind generation of mechanical energy which apparatus comprises a housing, a rotor which comprises a plurality of blades disposed in a cylindrical plane and which is mounted in said housing for rotation about the axis of rotation of said cylindrical plane, said rotor blades being of such form and being so arranged in said plane as, in use of the apparatus, to cause said rotor to rotate in response to incidence on said rotor of air streams having a vector normal to the axis of rotation of said rotor and said housing comprising guide means so constructed that, in use of the apparatus, air streams convergent on the rotor have incident on the rotor blades only components which cause unidirectional rotation of said rotor.
Conveniently, the guide means of said housing comprises a plurality of guide members df such form and so disposed with vertically-oriented axes as to allow incidence on the rotor blades of air streams having a vector such as, in use of the apparatus, causes rotation of the rotor in a desired direction but either to prevent incidence on the rotor blades of air streams having a vector such as in use of the apparatus, opposes rotation of the rotor in said desired direction or to redirect such latter air streams so as not to oppose rotation in said desired direction.
The guide means may, for example, be disposed at least in arcuate plane which forms part of a cylindrical plane having an axis which is common with the axis of rotation of said rotor.
Accordingly, in a particular embodiment of the invention, the housing is in the general form of a cylinder, said cylinder being a hollow right cylinder of circular cross-section defined by the guide members.
In preferred forms of the apparatus, the blades of said rotor are of an elongate form extending along substantially the total axial extent of said rotor.
Preferably, the housing includes air stream control means movable between a first position in which said means acts as a barrier or impediment to said air streams to prevent or reduce incidence of air streams on the blades of said rotor and a position in which said means acts neither as a barrier nor an impediment to said air streams. In one particular form of this preferred kind of apparatus, the air stream control means comprises a plurality of members arranged so as to be movable telescopically between said first and second positions.
The apparatus of the invention may be used to supply mechanical energy to a hydraulic pump or a compressor, for example, but a preferred use of the apparatus is use in combination with means which can convert to electrical energy the mechanical energy generated in use of the apparatus.
A particular embodiment of the invention will now be described by way of example, reference being made to the accompanying drawings, in which: Figure 1 is a plan view of the apparatus, partially in cross-section along the line I-I of Figure 2; and Figure 2 is a side elevation of the apparatus shown in Figure 1, partially in cross-section along the line Il-Il of Figure 1 and viewed in the direction of the arrow Ill shown in Figure 1.
The apparatus shown in the drawings comprises a housing shown generally at 1 and having the general form of an upright right cylinder of hollow circular cross-section, and a rotor 3 mounted for rotation within the housing 1 about an axis which the rotor 3 has in common with the cylinder.
The housing 1 comprises a plurality of spaced apart shaped guide members in the form of elongate steel plates 5 arranged to define a cylindrical wall having a plurality of passageways 7 through which air streams enter the housing 1 in use of the apparatus. The plates 5 are oriented with respect to each other so that the passageways 7 narrow towards the interior of the housing. As best seen from Figure 1, each of the plates 5 has a cross-section which widens to a maximum approximately midway across the width of the plate and tapers smoothly to a tip 9 at the innermost plate extremity. This feature and the narrowing referred to above impart to the passageways 7 an essentially Venturi throat construction which increases the velocity of air streams entering the interior of the housing 1 through the passageways 7 in use of the apparatus.
The plates 5 are welded at their lowermost extremities to a circular steel base plate 11 which has a diameter larger than that of the cylindrical wall which the plates 5 define so as to provide an annularflange 13.
At their uppermost extremities, the plates 5 are welded to an inner annular portion 1 7 of a steel top ring 1 5 whose external diameter is slightly smaller than the diameter of the base plate 1 A circular cover plate 19, of a diameter smaller than the external diameter of the top ring 15 but larger than the internal diameter of top ring 15, is received concentrically on the upper face of the top ring 1 5. The cover plate 19 is secured to the top ring 1 5 by means (not shown, but which may conveniently comprise a plurality of nut and bolt assemblies secured through apertures in the cover plate 19 and top ring 1 5) which enable removal of the cover plate 1 9 from the housing.
A bearing assembly 21 is mounted over an aperture provided centrally in the cover plate 1 9 and comprises a conventional sleeve bearing and bearing housing.
Mounted on the base plate 11 is a geared transmission assembly shown generally at 23 in Figure 2 and comprising a gear box 25 having a conventional sleeve bearing housed in bearing housing 27. Drive is connected from the gear box 25 to an electric generator 29 also mounted on the base plate 11 of the housing 1.
The rotor 3 comprises an axle 31 having conventional journal bearings (not shown) at its axial extremities. The journal bearings are received in the sleeve bearings of bearing assembly 21 and gearbox 25. Secured by means not shown near the axial extremities of axle 31 are upper and lower axle plates 33 and 35 which are circular and made of steel. Similar axle plates 37 and 39 are secured to the axle 31 in the same fashion at points between the upper and lower axle plates 33 and 35 so thatthe axle plates are spaced from each other by equal distances.
Secured by welding between the axle plates 35 and 39 are rotor blades 41 which are made of steel and in cross-section have the curved tapering form shown in Figure 2. The blades 41 are disposed with their axes vertical and, as shown in Figure 2, the blades 41 are secured to axle plates 35 and 39 across an annular peripheral portion of the axle plates with the blades 41 oriented in a non-radial fashion with respect to the axle plates. Further steel rotor blades 43 and 45 are provided between axle plates 39 and 37 and axle plates 37 and 33, and these are secured and disposed in the same manner so that the rotor 3 has essentially the external form of a right circular cylinder.
As indicated generally at 47 an air stream control means which here takes the form of a telescopic wall assembly is provided. The telescopic wall assembly is composed of cylindrical wall sections (shown in the drawings in fully raised position) provided externally of the elongate steel plates 5 of the housing 1. This assembly 47 comprises a first cylindrical wall section 49 secured by welding at its base to the base plate 11 of the housing 1 and three additional similar wall sections 51,53 and 55.
Hydraulic jacks 57, 59, 61 and 63 are mounted on the flange 1 3 of base plate 11 and are arranged so as in operation as described below to raise and lower the wail sections of the telescopic wall assembly 47.
For operation of the apparatus shown in the drawings, the apparatus should be placed in a location exposed to strong winds either on the ground or on a plinth provided for it on the ground, so that the axle 31 is disposed vertically. With the telescopic wall assembly 47 in a fuliy lowered position, wind blowing in the direction shown by the arrow A in Figure 1 of the drawing enters the housing 1, passing through passageways 7 and between rotor blades 41, 43, 45 as indicated by the flowpath arrows shown in Figure 1 in chain lines.It will be appreciated that the wind is received with greater force through some of passageways 7 than through others and in Figure 1 variation in wind force is indicated by variation in the density of flow path arrows, a relatively large density of flow path arrows in a particular region of the apparatus, of course, signifying a relatively high wind force in that region although - naturally Figure 1 is intended to show wind force variation in very approximate terms only.
As will be seen from Figure 1, air movement of significant force is received even in regions of the apparatus not directly open to the wind.
In cases where the wind varies in direction over a short period of time, many known wind generators are inefficient because wind from different directions tends either to produce rotation of the generator rotor in a different direction or, more importantly, to apply to the rotor forces which oppose rotation already produced in the generator by wind from another direction. It will be appreciated from Figure 1 that wind blowing in either or both of the different directions indicated by arrows B and C in the Figure (either simultaneous with wind in the direction of the arrow A or not) apply to the rotor blades 41, 43, 45 only such air movements as cause clockwise rotation of the rotor 3, wind producing air movements which would oppose such rotation being essentially excluded from the housing (or redirected) by the elongate steel plates 5.
In practice the amount of mechanical energy to be produced by the apparatus shown in the drawings will need to be variable and accordingly it will be necessary to be able to vary the wind energy effective on the rotor 3. Excessively high wind speeds in some iocalities may give rise to rotor speeds which exceed the design speed and this is an additional reason why the apparatus needs a means by which the wind energy active against the rotor 3 can be varied as desired.
In the case of the apparatus shown in the drawings, such variation can be achieved using the telescopic wall assembly 47. When need arises to vary the wind energy active on the rotor, 3, means (not shown) can be operated either manually or automatically in response to sensing of wind speed, to actuate the hydraulic jacks 57, 59, 61 and 63.
As will be appreciated by those skilled in the art, various modifications may be made to the apparatus shown in the drawings, as desired. For example, the housing 1 including the elongate plates 5 may, if desired, be made of reinforced concrete rather than steel and this alternative construction material will normally be more convenient when the apparatus is constructed on a large scale. Additionally, the telescopic wall assembly 47 may alternatively, of course, be raised by means of manually operable pulleys or the like provided instead of the jacks 57, 59, 61 and 63.

Claims (16)

1. An apparatus for use in wind generation of mechanical energy which apparatus comprises a housing, a rotor which comprises a plurality of blades disposed in a cylindrical plane and which is mounted in said housing for rotation about the axis of rotation of said cylindrical plane, said rotor blades being of such form and being so arranged in said plane as, in use of the apparatus, to cause said rotor to rotate in response to incidence on said rotor of air streams having a vector normal to the axis of rotation of said rotor and said housing comprising guide means so constructed that, in use of the apparatus, air streams convergent on the rotor have incident on the rotor blades only components which cause unidirectional rotation of said rotor.
2. An apparatus as claimed in claim 1, wherein said guide means of said housing comprises a plurality of guide members of such form and so disposed with vertically-oriented axes as to allow incidence on the rotor blades of air streams having a vector such as, in use of the apparatus, causes rotation of the rotor in a desired direction but either to prevent incidence on the rotor blades of air streams having a vector such as, in use of the apparatus, opposes rotation of the rotor in said desired direction or to redirect such latter air streams so as not to oppose rotation in said desired direction.
3. An apparatus as claimed in claim 2, wherein said guide members are disposed at least in an arcuate plane which forms part of a cylindrical plane having an axis which is common with the axis of rotation of said rotor.
4. An apparatus as claimed in claim 3, wherein said housing is in the general form of a cylinder, said cylinder being a hollow right cylinder of circular cross-section defined by the guide members.
5. An apparatus as claimed in any preceding claim, wherein the blades of said rotor are of an elongate form extending along substantially the totai axial extent of said rotor.
6. An apparatus as claimed in claim 5, wherein the blades are substantially of the form illustrated in Figures 1 and 2 of the accompanying drawings.
7. An apparatus as claimed in any preceding claim wherein the guide means of said housing comprises a plurality of elongate guide members substantially of the form and disposition illustrated in Figures 1 and 2 of the accompanying drawings.
8. An apparatus as claimed in any preceding claim, wherein the housing includes air stream control means movable between a first position in which said means acts as a barrier or impediment to said air streams to prevent or reduce incidence of air streams on the blades of said rotor and a position in which said means acts neither as a barrier nor an impediment to said air streams.
9. An apparatus as claimed in claim 8, wherein said air stream control means comprises a plurality of members arranged so as to be movable telescopically between said first and second positions.
10. Apparatus for converting fluid flow to rotation energy; said apparatus comprising stationary housing means containing rotor means provided with shaped blades wherein the housing means is apertured to provide plural tapering fluid entry paths which co-operate with the rotor blades to direct fluid onto the rotor blades to impart unidirectional rotary motion to the motor.
11. Apparatus for converting air, e.g. wind, flow to rotational energy; said apparatus comprising a stationary housing containing a rotor, the rotor having aerofoil section blades and the housing being composed of a stack of plates defining therebetween air entry paths which are directed to taper inwardly towards the rotor in a non-radial direction so as to direct and guide the air flow onto the rotor blade to impart unidirectional rotory motion to the rotor.
1 2. Apparatus substantially as hereinbefore described with reference to Figures 1 and 2 of the accompanying drawings.
1 3. An electrical energy generation system comprising an apparatus as claimed in any preceding claim and means for conversion to electrical energy of mechanical energy generated in use of such apparatus.
14. A housing for an apparatus as claimed in any preceding claim, said housing having a construction as defined in any preceding claim.
15. A housing as claimed in claim 14 and substantially as hereinbefore described with reference to, and as illustrated in, Figures 1 and 2 of the accompanying drawings.
16. A method of converting fluid flow to rotational energy which method comprises disposing a housing for a rotor in the path of flowing fluid so that said fluid enters said housing through apertures provided in the housing in a form which defines tapered fluid entry paths which cooperate with blades of said rotor to direct said fiowing fluid onto the rotor blades to impart unidirectional rotary motion to the rotor.
GB7915956A 1979-05-09 1979-05-09 Apparatus for generating energy Withdrawn GB2049066A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB7915956A GB2049066A (en) 1979-05-09 1979-05-09 Apparatus for generating energy

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Application Number Priority Date Filing Date Title
GB7915956A GB2049066A (en) 1979-05-09 1979-05-09 Apparatus for generating energy

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GB2049066A true GB2049066A (en) 1980-12-17

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Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2167498A (en) * 1984-09-13 1986-05-29 Kenneth William Perkins Portable air turbine unit
GB2275970A (en) * 1993-03-13 1994-09-14 Kenneth Morgan Davies Vertical axis wind turbines
US5380149A (en) * 1990-05-31 1995-01-10 Valsamidis; Michael Wind turbine cross wind machine
GB2302918A (en) * 1995-07-05 1997-02-05 Derek Alan Taylor Fluid flow concentrator for turbines
WO1998007981A1 (en) * 1996-08-23 1998-02-26 Georges Gual Wind turbine with low vertical axis
ES2149638A1 (en) * 1995-05-25 2000-11-01 Colomer Climent Enrique Vertical axis device for capturing, concentrating, directing, and capacitating energy from moving liquids
WO2000068569A1 (en) * 1999-05-05 2000-11-16 Ramona Themel Wind power facility with a vertical rotor
WO2004046545A1 (en) * 2002-11-19 2004-06-03 Tecnotex Srl Rotor wind plant
FR2886353A1 (en) * 2005-05-27 2006-12-01 Michel Georges Ponge Wind energy transforming device for e.g. firm, has stator with air inlets delimited by walls channeling air to rotor having vertical vanes, where inlets and vanes are fixed at top and bottom to plates and reinforced by horizontal tympanums
WO2009135261A1 (en) * 2008-05-07 2009-11-12 Design Licensing International Pty Ltd Wind turbine
WO2010123400A1 (en) 2009-04-24 2010-10-28 МИХОВ, Александр Петрович Wind energy installation
GB2477824A (en) * 2010-08-26 2011-08-17 Guy Andrew Vaz Vertical axis turbine with annular radial vane
WO2013024367A1 (en) 2011-08-16 2013-02-21 Mikhov, Alexander Petrovich Wind power generator
GB2502979A (en) * 2012-06-11 2013-12-18 Jonathan Harry Warrilow Wind turbine with outer stationary vanes surrounding inner vanes
US9303622B2 (en) 2006-12-04 2016-04-05 Design Licensing International Pty Ltd Wind turbine apparatus

Cited By (28)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2167498A (en) * 1984-09-13 1986-05-29 Kenneth William Perkins Portable air turbine unit
US5380149A (en) * 1990-05-31 1995-01-10 Valsamidis; Michael Wind turbine cross wind machine
GB2275970A (en) * 1993-03-13 1994-09-14 Kenneth Morgan Davies Vertical axis wind turbines
GB2275970B (en) * 1993-03-13 1996-02-14 Kenneth Morgan Davies Improvements relating to vertical axis wind turbines
ES2149638A1 (en) * 1995-05-25 2000-11-01 Colomer Climent Enrique Vertical axis device for capturing, concentrating, directing, and capacitating energy from moving liquids
GB2302918A (en) * 1995-07-05 1997-02-05 Derek Alan Taylor Fluid flow concentrator for turbines
GB2302918B (en) * 1995-07-05 2000-02-23 Derek Alan Taylor A device for extracting energy from a fluid flow
WO1998007981A1 (en) * 1996-08-23 1998-02-26 Georges Gual Wind turbine with low vertical axis
FR2752599A1 (en) * 1996-08-23 1998-02-27 Gual Georges Jean STATO-WIND MODULE WITH FLAT AND PERIPTER CONFORMATION
US6309172B1 (en) 1996-08-23 2001-10-30 Georges Gual Wind turbine with low vertical axis
WO2000068569A1 (en) * 1999-05-05 2000-11-16 Ramona Themel Wind power facility with a vertical rotor
US6666650B1 (en) 1999-05-05 2003-12-23 Ramona Themel Wind power facility with a verticle rotor
EP1577547A4 (en) * 2002-11-19 2006-02-01 Aleksey Vasilyevich Ivanayskiy Rotor wind plant
WO2004046545A1 (en) * 2002-11-19 2004-06-03 Tecnotex Srl Rotor wind plant
EP1577547A1 (en) * 2002-11-19 2005-09-21 Aleksey Vasilyevich Ivanayskiy Rotor wind plant
FR2886353A1 (en) * 2005-05-27 2006-12-01 Michel Georges Ponge Wind energy transforming device for e.g. firm, has stator with air inlets delimited by walls channeling air to rotor having vertical vanes, where inlets and vanes are fixed at top and bottom to plates and reinforced by horizontal tympanums
US9303622B2 (en) 2006-12-04 2016-04-05 Design Licensing International Pty Ltd Wind turbine apparatus
US8419346B2 (en) 2008-05-07 2013-04-16 Design Licensing International Pty Ltd Wind turbine
WO2009135261A1 (en) * 2008-05-07 2009-11-12 Design Licensing International Pty Ltd Wind turbine
WO2010123400A1 (en) 2009-04-24 2010-10-28 МИХОВ, Александр Петрович Wind energy installation
GB2477824B (en) * 2010-08-26 2012-02-15 Guy Andrew Vaz Vertical axis turbine
AU2010359619B2 (en) * 2010-08-26 2013-07-04 Guy Andrew Vaz Vertical axis turbine
US8511965B2 (en) 2010-08-26 2013-08-20 Guy Andrew Vaz Vertical axis turbine
US8882439B2 (en) 2010-08-26 2014-11-11 Guy Andrew Vaz Vertical axis turbine
GB2477824A (en) * 2010-08-26 2011-08-17 Guy Andrew Vaz Vertical axis turbine with annular radial vane
US9534581B2 (en) 2010-08-26 2017-01-03 Guy Andrew Vaz Vertical axis turbine
WO2013024367A1 (en) 2011-08-16 2013-02-21 Mikhov, Alexander Petrovich Wind power generator
GB2502979A (en) * 2012-06-11 2013-12-18 Jonathan Harry Warrilow Wind turbine with outer stationary vanes surrounding inner vanes

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