WO2019113675A1 - Conception de pales pour éoliennes darrieus - Google Patents

Conception de pales pour éoliennes darrieus Download PDF

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Publication number
WO2019113675A1
WO2019113675A1 PCT/CA2018/000234 CA2018000234W WO2019113675A1 WO 2019113675 A1 WO2019113675 A1 WO 2019113675A1 CA 2018000234 W CA2018000234 W CA 2018000234W WO 2019113675 A1 WO2019113675 A1 WO 2019113675A1
Authority
WO
WIPO (PCT)
Prior art keywords
blade
dvawt
deflector
radius
design
Prior art date
Application number
PCT/CA2018/000234
Other languages
English (en)
Inventor
François GAGNON
Original Assignee
Wind-Do Energy Inc.
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 Wind-Do Energy Inc. filed Critical Wind-Do Energy Inc.
Publication of WO2019113675A1 publication Critical patent/WO2019113675A1/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
    • 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 
    • F03D3/06—Rotors
    • 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
    • F05B2240/212—Rotors for wind turbines with vertical axis of the Darrieus 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
    • Y02E10/74—Wind turbines with rotation axis perpendicular to the wind direction

Definitions

  • T he present invention relates in general to vertical wind turbine blades, and, more specifically, to a Darrieus Vertical Axis Wind Turbine (DVAWT) blade comprising a convex top surface and a convex bottom surface combined with a flat section to increase airfoil efficiency.
  • DVD Darrieus Vertical Axis Wind Turbine
  • renewable Energy is that electrical energy collected from renewable resources such as sunlight, wind, water, or geothermal heat. With the advance of technology, more efficient methods of collecting such renewable energy have become commonly available to consumers and commonplace in the environment.
  • One such common method of renewable energy collection comes in the form of wind turbines, which convert the kinetic energy of wind into electrical energy. Wind turbines are generally divided into vertical axis types and horizontal axis types, depending primarily on the orientation of the axis about which the various blades rotate.
  • VAWT Vertical Axis Wind Turbine
  • DVT Darrieus Vertical Axis Wind Turbine
  • the DVAWT generally comprises a plurality of curved airfoil blades arranged symmetrically around a vertical rotating shaft. Because of the particular blade design and orientation each surface of each blade faces into the wind depending on its position in the horizontal 360° travel arc, and the total profile of the blade contributes significantly to the overall efficiency of the turbine system. Commonly used blade profiles are not optimized for efficient use in DVAWT applications as the theory underlying their design is based on outmoded principles.
  • a DVAWT blade designed using modem principles to provide increased efficiency to the overall system.
  • Such a blade design may comprise a convex top surface and a different convex bottom surface combined with a planar section to increase efficiency.
  • Such a design may further reduce the visual and audible disturbances generated by the system as a result of such increased efficiency.
  • the present invention describes a Darrieus Vertical Axis Wind Turbine (DVAWT) blade comprising a convex top surface and a partially convex bottom surface combined with a flat section to increase airfoil efficiency.
  • DVD Darrieus Vertical Axis Wind Turbine
  • the present invention discloses novel aspects for the design of a DVAWT blade.
  • the disclosure focuses on the shape of the blade and the shape of the nose.
  • the design requirements for the shape of a DVAWT blade is unlike any other blade as it operates differently at each position of the blade around the central axis.
  • the operating characteristics must be considered in 360 positions around the blade’s circular travel arc.
  • the total efficiency of the turbine is the summation of all the torque and drag at each position.
  • FIG. 20 shows a front view of the blade 25 in operation. On one side there is a high over- pressure zone beside an ambient one, and on the other side an even higher under -pressure zone. Thus, there is a strong airflow 27 at the ends of the blade that generates both 1) turbulences that produce noise and drag, and 2) a loss of pressure 26 on both sides near the top and bottom that reduce the efficiency of the blade.

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)

Abstract

La pale d'éolienne à axe vertical Darrieus (DVAWT) de la présente invention comprend une surface supérieure convexe et une surface inférieure partiellement convexe combinée à une section plate pour augmenter l'efficacité du profil aérodynamique. Une telle conception de pale utilise des principes modernes pour fournir un rendement accru au système global et peut en outre réduire les perturbations visuelles et audibles générées par le système en raison d'une telle augmentation de rendement. Une telle conception de pale spécifie en outre un profil de nez préféré pour l'amélioration du flux d'air. La pale de DVAWT selon l'invention peut en outre comprendre un déflecteur supérieur et un déflecteur inférieur pour augmenter le rendement et réduire le bruit.
PCT/CA2018/000234 2017-12-15 2018-12-13 Conception de pales pour éoliennes darrieus WO2019113675A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US201762599655P 2017-12-15 2017-12-15
US62/599,655 2017-12-15

Publications (1)

Publication Number Publication Date
WO2019113675A1 true WO2019113675A1 (fr) 2019-06-20

Family

ID=66818848

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CA2018/000234 WO2019113675A1 (fr) 2017-12-15 2018-12-13 Conception de pales pour éoliennes darrieus

Country Status (1)

Country Link
WO (1) WO2019113675A1 (fr)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2012174864A1 (fr) * 2011-06-20 2012-12-27 Liu Haiping Mécanisme à énergie éolienne à anneau excentrique
FR3011285A1 (fr) * 2013-09-30 2015-04-03 Electricfil Automotive Rotor pour eolienne notamment a axe vertical
EP2908003A1 (fr) * 2014-02-13 2015-08-19 X-Wind Power Limited Rotor d'éolienne à axe vertical et profil aérodynamique

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2012174864A1 (fr) * 2011-06-20 2012-12-27 Liu Haiping Mécanisme à énergie éolienne à anneau excentrique
FR3011285A1 (fr) * 2013-09-30 2015-04-03 Electricfil Automotive Rotor pour eolienne notamment a axe vertical
EP2908003A1 (fr) * 2014-02-13 2015-08-19 X-Wind Power Limited Rotor d'éolienne à axe vertical et profil aérodynamique

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