DK73796A - Device for noise reduction of wind turbines - Google Patents

Device for noise reduction of wind turbines Download PDF

Info

Publication number
DK73796A
DK73796A DK073796A DK73796A DK73796A DK 73796 A DK73796 A DK 73796A DK 073796 A DK073796 A DK 073796A DK 73796 A DK73796 A DK 73796A DK 73796 A DK73796 A DK 73796A
Authority
DK
Denmark
Prior art keywords
rear edge
noise reduction
wind turbines
sail
flexible
Prior art date
Application number
DK073796A
Other languages
Danish (da)
Other versions
DK172218B1 (en
Inventor
Peter Grabau
Original Assignee
Lm Glasfiber As
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 Lm Glasfiber As filed Critical Lm Glasfiber As
Priority to DK073796A priority Critical patent/DK172218B1/en
Publication of DK73796A publication Critical patent/DK73796A/en
Application granted granted Critical
Publication of DK172218B1 publication Critical patent/DK172218B1/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
    • 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
    • F03D1/0641—Rotors characterised by their aerodynamic shape of the blades of the section profile of the blades, i.e. aerofoil profile
    • 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
    • F05B2240/30—Characteristics of rotor blades, i.e. of any element transforming dynamic fluid energy to or from rotational energy and being attached to a rotor
    • F05B2240/304—Details of the trailing edge
    • 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
    • F05B2240/30—Characteristics of rotor blades, i.e. of any element transforming dynamic fluid energy to or from rotational energy and being attached to a rotor
    • F05B2240/31—Characteristics of rotor blades, i.e. of any element transforming dynamic fluid energy to or from rotational energy and being attached to a rotor of changeable form or shape
    • F05B2240/311—Characteristics of rotor blades, i.e. of any element transforming dynamic fluid energy to or from rotational energy and being attached to a rotor of changeable form or shape flexible or elastic
    • 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
    • F05B2260/96—Preventing, counteracting or reducing vibration or noise
    • F05B2260/962—Preventing, counteracting or reducing vibration or noise by means creating "anti-noise"
    • 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
    • F05B2280/00—Materials; Properties thereof
    • F05B2280/40—Organic materials
    • F05B2280/4004—Rubber
    • 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
    • F05B2280/00—Materials; Properties thereof
    • F05B2280/40—Organic materials
    • F05B2280/4006—Polyamides, e.g. NYLON
    • 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
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
    • Y02P70/50—Manufacturing or production processes characterised by the final manufactured product

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (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)
  • Woven Fabrics (AREA)

Abstract

In recognition of the fact that a large amount of the noise and other harmful influences on windmills are caused by vortices at the rear edge of the sail, a flexible rear edge is used, which may adjust to local variations in pressure. A preferred embodiment utilizes a woven rear edge 6 made of strong artificial fibres which are cemented into the rear edge 4 of the sail profile at the joint between the two halves 1, 2. Particular advantages may be obtained by unravelling the strips, so that a large number of individual fibres constitute the flexible rear edge. <IMAGE>
DK073796A 1994-01-12 1996-07-05 Windmill sail with noise-limiting arrangement and method of production of such a sail DK172218B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DK073796A DK172218B1 (en) 1994-01-12 1996-07-05 Windmill sail with noise-limiting arrangement and method of production of such a sail

Applications Claiming Priority (6)

Application Number Priority Date Filing Date Title
DK5594 1994-01-12
DK5594 1994-01-12
PCT/DK1995/000017 WO1995019500A1 (en) 1994-01-12 1995-01-11 Windmill
DK9500017 1995-01-11
DK073796A DK172218B1 (en) 1994-01-12 1996-07-05 Windmill sail with noise-limiting arrangement and method of production of such a sail
DK73796 1996-07-05

Publications (2)

Publication Number Publication Date
DK73796A true DK73796A (en) 1996-07-05
DK172218B1 DK172218B1 (en) 1998-01-05

Family

ID=8089225

Family Applications (1)

Application Number Title Priority Date Filing Date
DK073796A DK172218B1 (en) 1994-01-12 1996-07-05 Windmill sail with noise-limiting arrangement and method of production of such a sail

Country Status (4)

Country Link
AU (1) AU1413595A (en)
DE (1) DE19580147B3 (en)
DK (1) DK172218B1 (en)
WO (1) WO1995019500A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10316817B2 (en) 2014-05-01 2019-06-11 Lm Wp Patent Holding A/S Wind turbine blade and an associated manufacturing method

Families Citing this family (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19644264A1 (en) * 1996-10-24 1998-05-07 Manfred Grefe Rotor blade for wind power generator
DE19647102A1 (en) * 1996-11-14 1998-05-20 Philippe Arribi Flow body
DE19738278A1 (en) * 1997-09-02 1999-03-04 Felix Hafner Adaptive rotor for wind power plants
DE19815519A1 (en) 1998-03-31 1999-10-07 Tacke Windenergie Gmbh Rotor blade for a wind turbine
DK174318B1 (en) 2000-06-19 2002-12-02 Lm Glasfiber As Wind turbine rotor blade includes flap comprising laminate(s) with layers of materials having differing thermal expansion coefficients
US7059833B2 (en) * 2001-11-26 2006-06-13 Bonus Energy A/S Method for improvement of the efficiency of a wind turbine rotor
DE102005019905B4 (en) * 2005-04-29 2012-12-06 Nordex Energy Gmbh Rotor blade for a wind energy plant
JP2009502104A (en) 2005-07-15 2009-01-22 サウスウェスト ウィンドパワー インコーポレーテッド Wind turbine and manufacturing method
ES2318925B1 (en) * 2005-09-22 2010-02-11 GAMESA INNOVATION &amp; TECHNOLOGY, S.L. AEROGENERATOR WITH A BLADE ROTOR THAT REDUCES NOISE.
DE102005051931B4 (en) * 2005-10-29 2007-08-09 Nordex Energy Gmbh Rotor blade for wind turbines
DK176352B1 (en) * 2005-12-20 2007-09-10 Lm Glasfiber As Profile series for blade for wind turbines
ES2310958B1 (en) * 2006-09-15 2009-11-10 GAMESA INNOVATION &amp; TECHNOLOGY, S.L. OPTIMIZED AEROGENERATOR SHOVEL.
DE102008061838A1 (en) 2008-12-15 2010-06-17 Repower Systems Ag Rotor blade of a wind turbine with a turbulator
DE102009060650A1 (en) 2009-12-22 2011-06-30 Keller, Walter, 66994 Aeroacoustic rotor blade for a wind turbine and wind turbine equipped therewith
WO2011157849A2 (en) 2010-06-18 2011-12-22 Suzlon Blade Technology B.V. Rotor blade for a wind turbine
US8506250B2 (en) * 2011-10-19 2013-08-13 General Electric Company Wind turbine rotor blade with trailing edge extension and method of attachment
PL2666615T3 (en) * 2012-05-23 2015-10-30 Nordex Energy Gmbh Method for producing a half shell of rotor blade for a wind energy assembly or for producing a rotor blade for a wind energy assembly and production mould for this purpose
DK177928B1 (en) * 2013-06-17 2015-01-19 Envision Energy Denmark Aps Wind turbine blade with extended shell section
US9638164B2 (en) 2013-10-31 2017-05-02 General Electric Company Chord extenders for a wind turbine rotor blade assembly
WO2022136256A1 (en) * 2020-12-22 2022-06-30 Lm Wind Power A/S A method of manufacturing a shell of a wind turbine blade

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2527467B2 (en) * 1975-06-20 1978-10-19 Deutsche Forschungs- Und Versuchsanstalt Fuer Luft- Und Raumfahrt E.V., 5000 Koeln Body overflowed, especially airfoil
FR2337263A2 (en) * 1975-12-31 1977-07-29 Sicard Charles Rotor blade for fluid-rotated device - which undergoes change in shape due to aerodynamic force
US4081220A (en) * 1976-12-17 1978-03-28 United Technologies Corporation Semi-spar wound blade
DE3408532A1 (en) * 1984-03-06 1985-09-19 Ludolf von Dipl.-Ing. 1000 Berlin Walthausen Arrangement for reducing the hydrodynamic resistance of hulls
SE8600369D0 (en) * 1986-01-28 1986-01-28 Stromberg Karl Otto PROPELLER JUST WANTS TO MAKE A SUCH

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10316817B2 (en) 2014-05-01 2019-06-11 Lm Wp Patent Holding A/S Wind turbine blade and an associated manufacturing method

Also Published As

Publication number Publication date
DK172218B1 (en) 1998-01-05
AU1413595A (en) 1995-08-01
DE19580147T1 (en) 1997-01-02
WO1995019500A1 (en) 1995-07-20
DE19580147B3 (en) 2012-11-29

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Legal Events

Date Code Title Description
B1 Patent granted (law 1993)
PUP Patent expired

Expiry date: 20160705