WO2012176048A2 - Aérogénérateur à axe vertical amélioré - Google Patents

Aérogénérateur à axe vertical amélioré Download PDF

Info

Publication number
WO2012176048A2
WO2012176048A2 PCT/IB2012/001229 IB2012001229W WO2012176048A2 WO 2012176048 A2 WO2012176048 A2 WO 2012176048A2 IB 2012001229 W IB2012001229 W IB 2012001229W WO 2012176048 A2 WO2012176048 A2 WO 2012176048A2
Authority
WO
WIPO (PCT)
Prior art keywords
blade
chord
aerogenerator
aerogenerator according
arms
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.)
Ceased
Application number
PCT/IB2012/001229
Other languages
English (en)
Other versions
WO2012176048A3 (fr
Inventor
Andrea Berti
Gianfranco Liguri
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
EN-ECO SpA
Original Assignee
EN-ECO SpA
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 EN-ECO SpA filed Critical EN-ECO SpA
Publication of WO2012176048A2 publication Critical patent/WO2012176048A2/fr
Publication of WO2012176048A3 publication Critical patent/WO2012176048A3/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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 
    • F03D3/005—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
    • F03D3/061—Rotors characterised by their aerodynamic shape, e.g. aerofoil profiles
    • 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

  • This invention relates to an improved vertical-axis aerogenerator. More specifically, the invention regards a high-performance Darrieus type aerogenerator.
  • wind turbines or simply “turbines”
  • blades rectilinear or curved aerodynamic members
  • Darrieus turbines Another limitation of Darrieus turbines is the difficulty of their being set in motion at wind speeds under 3.5 m/sec, which means that auxiliary motors or resistance reduction devices may be required.
  • the main aim of this invention is to provide an improved, Darrieus type turbine whose shape and structure are such as to provide maximum energy efficiency under medium wind conditions typical of most urban, suburban and rural areas.
  • Another aim of the invention is to provide a vertical-axis aerogenerator which starts automatically at reduced wind speeds.
  • Yet another aim of the invention is to guarantee a high level of safety in the event of lightning or accidental detachment of turbine parts.
  • FIG. 1 is a schematic perspective view of a turbine according to the invention.
  • FIG. 2 is a side elevation view of the dorsal surface of a blade of the turbine of Figure 1;
  • FIG. 3 is a longitudinal section of the blade of Figure 2 through the cutting plane III-III of Figure 2;
  • FIG. 5 illustrates the turbine in a plan view from above.
  • an improved, Darrieus type vertical- axis aerogenerator comprises three equispaced blades 1 mechanically connected by arms 3a,3b to a central rotary member 5, advantageously consisting of an alternator for converting rotational kinetic energy to electrical energy to be stored or sent to a user.
  • each blade 1 (see Figure 2) the leading edge 10 and the trailing edge 12 are arcuate, essentially in the shape of circular arcs, where the curvature radius Rl of the leading edge is greater than the curvature radius R2 of the trailing edge.
  • the blade (see Figure 3) also has a curved longitudinal section which is symmetrical about a horizontal midplane M.
  • the longitudinal section is substantially in the shape of a circular arc whose radius Rc is essentially equal to 4 times the average radius Rr of rotation of the blade about the axis of the turbine.
  • the blade has a symmetrical wing profile, preferably of the NACA 0018 type, where:
  • the length of the maximum chord Cmax (of the wing profile at the midplane M) is 5 - 15%, and preferably 10%, greater than the length of the mid chord Cmed of the profiles; similarly, the length of the minimum chord Cmin (of the wing profile at the upper and lower edges) is 5 - 15%, and preferably 10%, smaller than the length of the mid chord Cmed; this, together with what is stated in the previous point, gives the blade the tapered profile illustrated in Figure 2;
  • ⁇ 3Cmed/Rr, is between 0.6 and 0.9 and preferably equal to about 0.85 for a turbine of 1 kW of power and to about 0.63 for a 3 kW turbine.
  • each blade 1 has an angle of incidence of between 2° and 6° and preferably approximately 3° (see Figure 5) for a 1 kW turbine and approximately 5° for a 3 kW turbine.
  • each blade is mounted on a pair of arms 3a,3b whose wing profiles (for example of the NACA 0028 type) are symmetrical about the midplane.
  • the connection point 18a, 18b at which each arm is joined to the respective blade is located at a distance from the midplane substantially equal to 1 ⁇ 4 of the height H of the blade, so as to minimize the bending moment.
  • each connection point intercepts the chord of the corresponding wing profile substantially at a distance from the leading edge equal to 30% of the chord, in order to avoid torsional stresses induced by aerodynamic forces.
  • the height H of the blade is substantially equal to 2 times the average radius of rotation Rr for a 1 kW turbine and to 2.2 times for a 3 kW turbine.
  • end winglets 20a,20b are advantageously applied to the upper and lower edges 14 and 16 of each blade 1.
  • the measured efficiency Cp was approximately 35%, much higher than the efficiency of prior art turbines under similar conditions.
  • the turbine proved capable of starting automatically at a wind speed as low as 2.5 m/sec.
  • the blades 1 and the arms 3a, 3b are provided with metal cables connected to each other at the connection points where the arms and blades are joined.
  • the ends of the cable are connected to the winglets 20a,20b, which are also made of metal.
  • the ends of the cables on the alternator 5 side are connected at the point of connection between arm and alternator.
  • the cables are made from materials characterized by high tensile strength, such as BAYCO, by Bayer, or steel braiding of suitable diameter.

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

L'invention concerne un aérogénérateur à axe vertical hautement performant amélioré, qui comporte trois éléments aérodynamiques. La solidité, la configuration desdits éléments aérodynamiques par rapport à l'axe de rotation et les profils des éléments aérodynamiques sont optimisés pour parvenir à une efficacité énergétique maximale dans des conditions de vent habituelles de zones urbaines, suburbaines et rurales.
PCT/IB2012/001229 2011-06-20 2012-06-20 Aérogénérateur à axe vertical amélioré Ceased WO2012176048A2 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT000012A ITPO20110012A1 (it) 2011-06-20 2011-06-20 Aerogeneratore perfezionato ad asse verticale
ITPO2011A000012 2011-06-20

Publications (2)

Publication Number Publication Date
WO2012176048A2 true WO2012176048A2 (fr) 2012-12-27
WO2012176048A3 WO2012176048A3 (fr) 2013-05-02

Family

ID=44504082

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/IB2012/001229 Ceased WO2012176048A2 (fr) 2011-06-20 2012-06-20 Aérogénérateur à axe vertical amélioré

Country Status (2)

Country Link
IT (1) ITPO20110012A1 (fr)
WO (1) WO2012176048A2 (fr)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101372251B1 (ko) * 2013-12-17 2014-03-10 (주)미가람 자이로밀형 풍력 터빈을 구비한 풍력 발전 타워
KR101372250B1 (ko) 2013-08-02 2014-03-10 (주)미가람 자이로밀형 풍력 터빈을 구비한 풍력 발전 타워
KR101372253B1 (ko) * 2013-12-17 2014-03-11 (주)미가람 자이로밀형 풍력 터빈을 구비한 풍력 발전 타워
KR101374050B1 (ko) * 2013-12-17 2014-03-12 (주)미가람 자이로밀형 풍력 터빈을 구비한 풍력 발전 타워
USD713789S1 (en) 2013-10-25 2014-09-23 Abundant Energy, LLC Vertical axis wind turbine apparatus
WO2015016444A1 (fr) * 2013-08-02 2015-02-05 (주)미가람 Tour de production d'énergie éolienne dotée d'une éolienne de type gyromill
JP2019073993A (ja) * 2017-10-13 2019-05-16 ＢＳ・Ｔｅｃｈ株式会社 風車及び風車の受風羽根
ES2803823A1 (es) * 2019-07-24 2021-01-29 Univ Huelva Sistema aerogenerador de eje vertical y palas para dicho sistema
GB2606390A (en) * 2021-05-06 2022-11-09 Achelous Energy Ltd Systems and devices for a floating renewable power station

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3918839A (en) * 1974-09-20 1975-11-11 Us Energy Wind turbine
US4115032A (en) * 1977-03-07 1978-09-19 Heinz Lange Windmill rotor
DE3825241A1 (de) * 1988-04-08 1989-10-19 Bentzel & Herter Wirtschafts U Windturbine
NO320286B1 (no) * 2003-11-19 2005-11-21 Dag Herman Zeiner-Gundersen Turbin for kraftproduksjon
GB0415545D0 (en) * 2004-07-12 2004-08-11 Peace Steven Wind turbine
US7896609B2 (en) * 2006-08-09 2011-03-01 Sri Vawt, Inc. Vertical axis wind turbine system

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2015016444A1 (fr) * 2013-08-02 2015-02-05 (주)미가람 Tour de production d'énergie éolienne dotée d'une éolienne de type gyromill
KR101372250B1 (ko) 2013-08-02 2014-03-10 (주)미가람 자이로밀형 풍력 터빈을 구비한 풍력 발전 타워
US10323621B2 (en) 2013-08-02 2019-06-18 Odin Energy Co., Ltd. Wind power generation tower provided with gyromill type wind turbine
RU2654550C2 (ru) * 2013-08-02 2018-05-21 Один Энерджи Ко., Лтд. Ветрогенераторная башня с турбиной гиромилл (варианты)
USD713789S1 (en) 2013-10-25 2014-09-23 Abundant Energy, LLC Vertical axis wind turbine apparatus
KR101374050B1 (ko) * 2013-12-17 2014-03-12 (주)미가람 자이로밀형 풍력 터빈을 구비한 풍력 발전 타워
KR101372251B1 (ko) * 2013-12-17 2014-03-10 (주)미가람 자이로밀형 풍력 터빈을 구비한 풍력 발전 타워
KR101372253B1 (ko) * 2013-12-17 2014-03-11 (주)미가람 자이로밀형 풍력 터빈을 구비한 풍력 발전 타워
JP2019073993A (ja) * 2017-10-13 2019-05-16 ＢＳ・Ｔｅｃｈ株式会社 風車及び風車の受風羽根
ES2803823A1 (es) * 2019-07-24 2021-01-29 Univ Huelva Sistema aerogenerador de eje vertical y palas para dicho sistema
GB2606390A (en) * 2021-05-06 2022-11-09 Achelous Energy Ltd Systems and devices for a floating renewable power station
GB2606490A (en) * 2021-05-06 2022-11-09 Achelous Energy Ltd Systems and devices for a floating renewable power station
GB2606390B (en) * 2021-05-06 2023-06-07 Achelous Energy Ltd Systems and devices for a floating renewable power station
GB2606490B (en) * 2021-05-06 2023-12-06 Achelous Energy Ltd Systems and devices for a floating renewable power station

Also Published As

Publication number Publication date
WO2012176048A3 (fr) 2013-05-02
ITPO20110012A1 (it) 2012-12-21

Similar Documents

Publication Publication Date Title
WO2012176048A2 (fr) Aérogénérateur à axe vertical amélioré
US7896609B2 (en) Vertical axis wind turbine system
WO2013007267A1 (fr) Pale d'éolienne
US8317480B2 (en) Turbine assembly and energy transfer method
WO2012117979A1 (fr) Pale de turbine éolienne et générateur d'électricité éolienne équipé de cette pale
CN111852758B (zh) 基于水平轴风力机叶片再利用的垂直轴风力机风轮结构
CN101705919B (zh) 倒张索式垂直轴风力发电机悬臂
CN104863792B (zh) 具有扭角的垂直轴风力机弯曲叶片
CN203756433U (zh) 一种用于海上风力发电的垂直轴叶片装置
CN202381253U (zh) 圆形叶片风力机
CN201858086U (zh) 双轮直驱复合型垂直轴风力发电机
WO2008088921A2 (fr) Éoliennes verticales et procédés d'actionnement de celles-ci
CN108979952A (zh) 一种风力机叶片
EP2740931A1 (fr) Pale d'éolienne à axe vertical et éolienne à axe vertical
CN212225436U (zh) 基于水平轴风力机叶片再利用的垂直轴风力机风轮结构
CN216922344U (zh) 一种风力发电机用叶片导流装置
EP2184484A1 (fr) Aérogénérateur
CN201367982Y (zh) 带避雷装置的水平轴、下风式大型风力发电机
CN215057878U (zh) 一种低雷诺数叶片翼型及应用其的水平轴风力机
CN103953506B (zh) 垂直轴风力发电机机组
CN101832226B (zh) 升力和阻力复合风动的垂直轴风力发电机及其风轮
CN209892383U (zh) 一种叶片可倾斜风力发电机风轮装置
CN103291540B (zh) 直叶片翼型弯度线与风轮运行轨迹重合的垂直轴风力机
CN103912442B (zh) 垂直轴风力发电机
CN206625938U (zh) 一种防雷风力发电装置

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 12745510

Country of ref document: EP

Kind code of ref document: A2

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 12745510

Country of ref document: EP

Kind code of ref document: A2