WO2010115832A4 - Windmill - Google Patents

Windmill Download PDF

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Publication number
WO2010115832A4
WO2010115832A4 PCT/EP2010/054382 EP2010054382W WO2010115832A4 WO 2010115832 A4 WO2010115832 A4 WO 2010115832A4 EP 2010054382 W EP2010054382 W EP 2010054382W WO 2010115832 A4 WO2010115832 A4 WO 2010115832A4
Authority
WO
WIPO (PCT)
Prior art keywords
windmill
blade
section
rotor
blade sections
Prior art date
Application number
PCT/EP2010/054382
Other languages
French (fr)
Other versions
WO2010115832A3 (en
WO2010115832A2 (en
Inventor
Henning Sparre Solfeldt
Jakob Bejbro Andersen
Original Assignee
Edgeflow Aps
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 Edgeflow Aps filed Critical Edgeflow Aps
Priority to EP10712081A priority Critical patent/EP2449255A2/en
Publication of WO2010115832A2 publication Critical patent/WO2010115832A2/en
Publication of WO2010115832A3 publication Critical patent/WO2010115832A3/en
Publication of WO2010115832A4 publication Critical patent/WO2010115832A4/en

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
    • F03D3/00—Wind motors with rotation axis substantially perpendicular to the air flow entering the rotor 
    • F03D3/002—Wind motors with rotation axis substantially perpendicular to the air flow entering the rotor  the axis being horizontal
    • 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
    • F03D13/00—Assembly, mounting or commissioning of wind motors; Arrangements specially adapted for transporting wind motor components
    • F03D13/20—Arrangements for mounting or supporting wind motors; Masts or towers for wind motors
    • 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
    • F05B2250/00—Geometry
    • F05B2250/20—Geometry three-dimensional
    • F05B2250/25—Geometry three-dimensional helical
    • 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
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B10/00—Integration of renewable energy sources in buildings
    • Y02B10/30—Wind power
    • 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
    • Y02E10/728—Onshore wind turbines
    • 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

Abstract

A windmill which comprises a rotor and a frame for rotatably supporting the rotor for a rotation around an axis. The rotor defines opposite ends and comprises a number of blade sections which extend between the opposite ends and define a surface of rotation around the axis during the rotation of the rotor. The rotor further comprises a set of frame structures, and each frame structure of the set of frame structures interconnect the number of blade sections and form a node at each blade section.

Claims

AMENDED CLAIMS received by the International Bureau on 6 December 2010 (06.12.2010)
1. A windmill comprising a rotor and a frame for rotatably supporting said rotor for a rotation around an axis, said rotor defining opposite ends and comprising a number of blade sections extending between said opposite ends and defining a surface of rotation around said axis during said rotation of said rotor, said rotor further comprising a set of frame structures, and each frame structure of said set of frame structures interconnecting said number of blade sections and forming a node at each blade section, wherein a first blade section of said number of blade sections has an aerofoil cross-section with a leading edge and a trailing edge.
2. The windmill according to claim 1 , wherein each frame structures of said set of frame structures is laying in a radial plane in relation to said axis.
3. The windmill according to any of the claims 1 to 2, wherein said axis is substantially horizontal.
4. The windmill according to any of the claims 1 to 3, wherein each node at a blade section of said number of blade sections is connected with adjacent nodes on the adjacent frame structures and at other blade sections of said number of blade sections by means of thin pretensioned connecting elements.
5. The windmill according to claim 4, wherein said connecting elements between nodes comprise wires adapted to be fixed to the nodes.
6. The windmill according to any of the claims 1 to 5 wherein the number of blade sections is four, five, six, or preferably three.
7. The windmill according to any of the claims 1 to 6, wherein each frame structure of said set of frame structures is located between said opposite ends and is made of poles extending between said number of blade sections.
8. The windmill according to any of the claims 1 to 7, wherein each frame structure of said set of frame structures is located between said opposite ends and is made of one single bent metal pipe, the pipe ends of said metal pipe is welded together and in the area around the nodes flattened to form bearing portions for mounting against the inside of a blade section of said number of blade sections.
9. The windmill according to any of the claims 1 to 7, wherein each blade section of said number of blade sections is twisted around said axis to define a first helix or a first portion of a helix.
10. The windmill according to claim 9, wherein each blade section of said number of blade sections is twisted by the tension of said pretensioned connecting elements.
11. The windmill according to any of the claims 1 to 8, wherein each blade section of said number of blade sections is linear and extends parallel to said axis.
12. The windmill according to any of the claims 1 to 11 , wherein a first frame structure of said set of frame structures is positioned at one of said opposite ends, said rotor further comprising a first hub centred on said axis, and said first hub is connected to and at least partially supporting said first frame structure and/or said number of blade sections.
13. The windmill according to claim 12, wherein a second frame structure of said set of frame structures is positioned at the opposite side of said rotor from said first frame structure, said rotor further comprising a second hub centred on said axis, said second hub being connected to said second frame structure and/or said number of blade sections.
14. The windmill according to any of the claims 12 to 13, wherein said first hub is connected to each node formed by said first frame structure by at least two wires, said at least two wires extend from said first hub from points spaced apart along said axis.
15. The windmill according to any of the claims 12 to 14, wherein said first hub is connected to said first frame structures by a first plate.
16. The windmill according to any of the claims 1-16, wherein each node formed at said first blade section is located at a point between said leading edge and said trailing edge.
17. The windmill according to any of the claims 1 to 16, wherein each node formed at said first blade section is located at a point between the centre of gravity and centre of pressure of said aerofoil cross-section.
18. The windmill according to any of the claims 1 to 17, wherein said first blade section has the same cross-section throughout its length.
19. The windmill according to claim 18, wherein each frame structure comprises a node portion defining an aperture in which said second blade section is received and supported.
20. The windmill according to claim 19, wherein each frame structure of said set of frame structures comprises a first and a second elongated portion connected to said node portion at said leading and trailing edge, respectively, for supporting said second blade section.
21. The windmill according to any of the claims 1 to 20, wherein a first frame structure of said set of frame structures has a circular outer rim centred on said axis.
22. The windmill according to claim 21 , wherein said first frame structure of said set of frame structures is a ring centred on said axis.
23. The windmill according to claim 21 , wherein said first frame structure of said set of frame structures is a toroid centred on said axis.
24. The windmill according to any of the claims 21 to 23 further comprising a rim connector engaging said circular outer rim under said rotation of said rotor.
25. The windmill according to claim 24, wherein said rim connector comprises an endless belt engaging and defining a loop around said circular outer rim.
26. The windmill according to any of the claims 24 to 25, wherein said rim connector comprises a wheel engaging said circular outer rim.
27. The windmill according to claim 24, wherein said circular outer rim comprises teeth to define a sprocket and said rim connector comprises an endless chain or connector sprocket engaging and cooperating with said sprocket.
28. The windmill according to any of the claims 1 to 27 further comprising a number of electrical generators or pumps coupled to said rotor.
29. The windmill according to claim 28, wherein a first electrical generator or pump of said number of electrical generators or pumps is coupled to said rotor via said first hub.
30. The windmill according to any of the claims 28 to 29, wherein a second electrical generator or pump of said number of electrical generators or pumps is coupled to said rotor via said rim connector.
31. The windmill according to any of the claims 1 to 30, wherein a frame structure of said set of frame structures twists around said axis to define a second helix or a second portion of a helix.
32. The windmill according to any of the claims 9 to 30, wherein a frame structure of said set of frame structures twists around said axis to define a second helix or a second portion of a helix, said second helix or a second portion of a helix twisting around said axis in a direction opposite to the twisting of said first helix or said first portion of a helix.
33. The windmill according to any of the claims 1 to 32, wherein said frame is provided with dampeners for dampening the spreading of mechanical vibrations from said rotor to the supporting surroundings.
34. The windmill according to any of the claims 1 to 33, wherein said windmill is adapted to be incorporated in a number of windmills in a windmill system, in which said number of windmills are attached to a building.
35. A windmill system comprising a number of windmills according to any of the claims 1 to 34 and a building, wherein said number of windmills are mounted on and supported by said building.
36. The windmill system according to claim 35, wherein said number of windmills is greater than two and said number of windmills has co-linear axes.
37. The windmill system according to any of the claims 35 to 36, wherein said building has a first and a second surface portion connected by an edge or elongated edge portion, said edge and said number of windmills are attached to said building at said edge or edge portion.
38. The windmill system according to claim 37, wherein said first and second surface portions are planar.
39. The windmill system according to any of the claims 37 to 38, wherein said number of windmills are positioned with their respective axes extending in the same direction as said edge or elongated edge portion.
40. The windmill system according to any of the claims 37 to 39, wherein said rotors of said number of windmills extend from both of said first and second surface portions.
41. The windmill system according to any of the claims 37 to 40, wherein said building comprises a first and a second wall, and said first surface portion is located on said first wall and said second surface portion is located on said second wall.
42. The windmill system according to any of the claims 37 to 40, wherein said building comprises a first wall and a second roof section, and said first surface portion is located on said first wall and said second surface portion is located on said second roof section.
43. The windmill according to claim 42, wherein a rotor of each of said number of windmills has a wing section of said number of wing sections having an aerofoil cross-section with a leading edge and a trailing edge, said wing section has a position of highest elevation in a rotation of said rotor around said axis and is oriented to position said leading edge upwind from said trailing edge with respect to a horizontal wind component perpendicular to said edge or edge portion.
44. The windmill system according to any of the claims 37 to 40, wherein said building comprises a first roof section and a second roof section, and said first surface portion is located on said first roof section and said second surface portion is located on said second roof section.
45. The windmill system according to any of the claims 35 to 44, wherein said building has a protruding portion at which said number of windmills are attached.
46. The windmill system according to any of the claims 35 to 46, wherein said building has a convex portion corresponding to a portion of a vertically extending cylinder, and said number of windmills are positioned on said convex portion with their respective axes extending vertically.
47. The windmill system according to any of the claims 34 to 46, wherein said building comprises an energy-storage for storing wind power from said number of windmills.
48. The windmill system according to claim 47, wherein said wind power is in the form of an alternating current, said system further comprising a frequency converter for changing the frequency of said alternating current.
49. The windmill system according to any of the claims 47 and 48, wherein said wind energy is in the form of an electrical current, and said system further comprises a rectifier for transforming said alternating current to a direct current, and said energy storage comprising a battery for being charged by said direct current and/or a hydrolyser for splitting water into hydrogen and oxygen by a hydrolysis driven by said direct current.
50. The windmill system according to any of the claims 34 to 49, wherein said building comprises an energy-conveyor for conveying wind power from said number of windmills within said building and/or to the outside of said building.
51. The windmill system according to claim 50, wherein said wind power is in the form of an electrical current, and said energy-conveyor comprises an electrical contact positioned within said building for tapping said electrical current.
52. A method of producing a windmill according to any of the claims 1 to 34 comprising:
providing said frame,
providing said number of blade sections,
providing said set of frame structures,
interconnecting said number of blade sections by said set of frame structures to form said rotor defining opposite ends and including said number of blade sections extending between said opposite ends, each frame structure forming a node at each blade section, and
rotationally supporting said rotor by said frame for enabling said rotation around said axis.
53. The method according to claim 52, wherein said step of providing said number of blade sections comprises:
providing a blade by an extrusion or pultrusion, and
cutting said blade into a blade section of said number of blade sections.
54. The method according to claim 53, wherein said blade is twisted in said extrusion or pultrusion by a rotational extrusion or pultrusion, respectively, to define a helix or a portion of a helix.
55. The method according to claim 52, wherein said step of providing said number of blade sections comprises:
providing a straight blade,
cutting said blade into a blade section of said number of blade sections, and twisting said blade sections to define a helix or a portion of a helix.
56. The method according to claim 52 further comprising:
providing thin connecting elements,
connecting adjacent nodes on adjacent frame structures and at adjacent blade sections by said thin connecting elements, and
tensioning said connecting elements.
57. The method according to claim 56 wherein in tensioning said connecting elements each of said number of blade sections is twisted to define a helix or a portion of a helix.
58. The method according to claim 52, wherein each blade section has the same cross-section throughout its length, each frame structure comprises a node portion defining an aperture for receiving a blade section of said number of blade sections, and said step of interconnecting said number of blade sections by said set of frame structures comprising:
inserting a blade of said number of blades into said aperture.
PCT/EP2010/054382 2009-04-01 2010-03-31 Windmill WO2010115832A2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP10712081A EP2449255A2 (en) 2009-04-01 2010-03-31 Windmill

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DKPA200900436 2009-04-01
DKPA200900436 2009-04-01

Publications (3)

Publication Number Publication Date
WO2010115832A2 WO2010115832A2 (en) 2010-10-14
WO2010115832A3 WO2010115832A3 (en) 2010-12-02
WO2010115832A4 true WO2010115832A4 (en) 2011-01-20

Family

ID=42727479

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2010/054382 WO2010115832A2 (en) 2009-04-01 2010-03-31 Windmill

Country Status (2)

Country Link
EP (1) EP2449255A2 (en)
WO (1) WO2010115832A2 (en)

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4293274A (en) * 1979-09-24 1981-10-06 Gilman Frederick C Vertical axis wind turbine for generating usable energy
DE9314187U1 (en) * 1993-09-16 1993-12-09 Mc Mahan Joachim Wind turbine for placement on buildings
KR100774309B1 (en) * 2006-11-28 2007-11-08 한국해양연구원 Power genaration system using helical turbine
GB0710318D0 (en) * 2007-05-30 2007-07-11 Isis Innovation Water turbine

Also Published As

Publication number Publication date
WO2010115832A3 (en) 2010-12-02
WO2010115832A2 (en) 2010-10-14
EP2449255A2 (en) 2012-05-09

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