EP2561219A1 - Turbine éolienne à axe vertical déguisée en arbre - Google Patents

Turbine éolienne à axe vertical déguisée en arbre

Info

Publication number
EP2561219A1
EP2561219A1 EP11722169A EP11722169A EP2561219A1 EP 2561219 A1 EP2561219 A1 EP 2561219A1 EP 11722169 A EP11722169 A EP 11722169A EP 11722169 A EP11722169 A EP 11722169A EP 2561219 A1 EP2561219 A1 EP 2561219A1
Authority
EP
European Patent Office
Prior art keywords
wind turbine
turbine according
stem
vanes
vane
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Withdrawn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
EP11722169A
Other languages
German (de)
English (en)
Inventor
Lorenzo Gaio
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.)
Stamet SpA
Original Assignee
Stamet 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 Stamet SpA filed Critical Stamet SpA
Publication of EP2561219A1 publication Critical patent/EP2561219A1/fr
Withdrawn legal-status Critical Current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
    • 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
    • F05B2250/70—Shape
    • 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

  • the present invention relates in general to turbines for conversion of wind energy into electrical or mechanical energy.
  • the invention regards a vertical-axis wind turbine, i.e., a turbine of the type in which a vaned rotor exposed to the current of the wind is carried by a vertical stem or upright that is able to turn for actuating a device for conversion of wind energy.
  • a vertical-axis wind turbine i.e., a turbine of the type in which a vaned rotor exposed to the current of the wind is carried by a vertical stem or upright that is able to turn for actuating a device for conversion of wind energy.
  • the rotor of the vertical-axis wind turbine has dimensions in height markedly smaller albeit with efficiencies and hence yields that are relatively more limited, basically owing to the fact that the flow of the wind at lower heights can be less intense and more disturbed .
  • the object of the present invention is to provide an original and intelligent solution to the aforesaid problem, and said purpose is achieved thanks to a vertical-axis wind turbine of the type defined above, primarily characterized in that it is configured for imitating a tree, for example a conifer, with said vanes having a rectilinear and elongated configuration with lengths that decrease progressively from a base for supporting the rotor in rotation to the top of the stem.
  • the base for supporting the wind turbine according to the invention houses the member for conversion of the wind energy into electrical or mechanical energy and is designed to be buried in the ground .
  • the wind turbine according to the invention ensures an extremely modest environmental impact on account of its more "natural” appearance, in particular as compared with that of current horizontal-axis wind turbines, and achieves a real mimetic effect which is deemed able to favour a wide diffusion thereof, for example, in sets spread in mountain or hilly environments exposed to dominant winds .
  • FIG. 1 is a schematic perspective view of a vertical-axis wind turbine according to the invention.
  • FIG. 1 is a top plan view of the turbine of Figure 1;
  • FIG. 3 is a view in elevation of the turbine of Figure 1;
  • FIG. 7 is a perspective view that shows at a larger scale one of the vanes of the wind turbine according to a first embodiment
  • FIGS. 8 and 9 are two perspective views at a larger scale that show two examples of member for attachment of each vane
  • Figure 10 is a view similar to that of Figure 7 that shows a variant of the vane, currently considered as preferred;
  • FIG. 11 is an exploded view of the vane of Figure 10;
  • FIG. 12 is a sectioned perspective view at a larger scale of a part of the vane of Figure 10;
  • FIG. 13 is a perspective view that shows at a larger scale the free end of the vane of Figure 10;
  • FIG. 14 is a sectioned perspective view at a larger scale that shows some alternative solutions for the transverse diaphragms of the vane of Figure 10;
  • Figure 15 is a schematic top plan view, similar to that of Figure 2, which shows the vertical-axis wind turbine according to the invention provided with vanes according to Figures 10 to 13;
  • FIG. 16 is an exploded perspective view of the supporting base of the vertical-axis wind turbine according to the invention.
  • the wind turbine basically comprises a base 1 that supports in rotation a vertical stem 2, which defines the axis of rotation of the wind turbine.
  • the base 1 is pre-arranged for being completely buried in the ground S in the site where the wind turbine is installed so as to be invisible and thus minimize the environmental impact during use of the turbine, albeit ensuring ease of access if need be, for example for possible maintenance operations.
  • the bottom end of the stem 2 is operatively associated to a converter of wind energy into electrical or mechanical energy, for example - as in the case of the embodiment described herein - to an electric generator 3.
  • the stem 2 carries a plurality of sets of vanes 4 rigidly fixed orthogonal to the stem 2.
  • the vanes 4 have a rectilinear configuration, i.e., they are directed radially with respect to the stem 2, and extend with progressively decreasing lengths from the base 1 to the top of the stem 2.
  • the longer vanes 4 are hence the ones closest to the base 1, whereas the shorter vanes 4 are those positioned at the top of the stem 2.
  • each set of vanes comprises a plurality of vanes 4 of the same length (in the case of the example illustrated in Figures 1-3, twelve in number) set at the same angular distances apart .
  • the wind turbine according to the invention is effectively configured so as to imitate a tree, and more in particular a conifer such as a fair or a pine.
  • the vanes 4 may be painted green.
  • Figures 4 and 5 are schematic illustrations of other examples of tree-like configurations of the wind turbine according to the invention, which differ from one another and with respect to the embodiment of Figures 1 to 3 as regards a different conformation and distribution of the corresponding vanes 4, which in any case are once again rectilinear and extend with progressively decreasing lengths from beneath upwards.
  • each vane 4 can be simply formed starting from a tubular body, for example with circular cross section and possibly tapered in a longitudinal direction, cut longitudinally so as to present a concave front 5 and a convex back 6.
  • the proximal end of the body of the vane 4 carries an end disk 7, projecting from which is an axial shank (not visible) rigidly fixed on which is an attachment member 8 for connection to similar attachment members of the other vanes 4 of the same set around the stem 2.
  • Figures 8 and 9 show two examples of the attachment member 8 respectively in the case where the set includes just two diametrally opposite vanes and in the case of three vanes arranged at 120° apart.
  • the attachment member 8 includes a hollow body 9 for fixing on the shank projecting from the end disk 7, and two side appendages 10 that are flange-shaped so as to mate with the corresponding appendages 10 of the attachment members 8 of the contiguous vanes 4 in order to be then fixed together via screws inserted within respective holes- 11. In this way, each set of vanes 4 is rigidly fixed around the stem 2.
  • Figures 10 to 13 show a variant of the body of each vane, designated by 4a, currently considered as the preferred embodiment.
  • the vane body 4a which is also rectilinear, elongated and formed with a concave front 5 and a convex back 6, has an elliptical cross section generally constant throughout its length.
  • transverse diaphragms in the form of fins 14 set at a distance apart along the extension of the vane 4a.
  • Said transverse diaphragms 14 have a shape and profile complementary to those of the concavity 5 and are fixed within the vane body 4a, for example via riveting (as may be seen in greater detail in Figure 12) in such a way as to project on the outside of its concavity 5.
  • the transverse diaphragms 14 and 15 are oriented obliquely with respect to the vane body 4a so as to form with the longitudinal direction thereof an angle, measured from the side of the stem 2, greater than 90°, as represented schematically in Figure 15.
  • This advantageously makes it possible to exploit to the full the force of the wind also when the angle formed between its direction and each vane 4a in rotation is greater than 90°.
  • the transverse diaphragms 14 may present different profiles, in particular each time designed from the fluid-dynamic standpoint according to the speed and intensity of the dominant winds in the areas in which the vertical-axis wind turbine according to the invention is to be installed. Examples of said alternative profiles are represented schematically and designated by 14a, 14b and 14c in Figure 14.
  • Figure 16 shows that it typically comprises a base plate 16 resting on which are two spacers 17 for supporting a support 18 for a container 19, housed within which is the energy-conversion device, which in the case represented here is constituted by a power takeoff 3 for driving, for example, a hydraulic pump.
  • the vertical stem 2 of the wind turbine traverses a tubular support 20 fixed to a top plate 21 and actuates' the power takeoff 3 through a coupling joint 22.

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 porte sur une turbine éolienne à axe vertical comportant un rotor qui comprend une tige verticale (2), et une pluralité de jeux de pales (4a) fixés perpendiculairement à la tige (2). La turbine est configurée pour imiter un arbre, les pales (4) ayant une configuration rectiligne et allongée, et possédant des longueurs qui décroissent progressivement d'une base (1), qui contient un dispositif de conversion de l'énergie éolienne (3) et qui est conçue pour être enterrée en utilisation dans le sol, vers le sommet de la tige (2).
EP11722169A 2010-04-19 2011-04-18 Turbine éolienne à axe vertical déguisée en arbre Withdrawn EP2561219A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITTO2010A000317A IT1399974B1 (it) 2010-04-19 2010-04-19 Turbina eolica ad asse verticale
PCT/IB2011/051666 WO2011132130A1 (fr) 2010-04-19 2011-04-18 Turbine éolienne à axe vertical déguisée en arbre

Publications (1)

Publication Number Publication Date
EP2561219A1 true EP2561219A1 (fr) 2013-02-27

Family

ID=43066002

Family Applications (1)

Application Number Title Priority Date Filing Date
EP11722169A Withdrawn EP2561219A1 (fr) 2010-04-19 2011-04-18 Turbine éolienne à axe vertical déguisée en arbre

Country Status (3)

Country Link
EP (1) EP2561219A1 (fr)
IT (1) IT1399974B1 (fr)
WO (1) WO2011132130A1 (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT511692B1 (de) * 2011-11-11 2013-02-15 Cuba Norbert Turbine, insbesondere windturbine
FR2988144B1 (fr) * 2012-03-14 2016-12-23 Newwind Aerogenerateur comprenant un tronc et une pluralite de branches s'etendant a partir de ce tronc.
FR2999246A1 (fr) * 2012-12-06 2014-06-13 Jean Marc Armbruster Arbre eolien
JP5877458B1 (ja) * 2015-07-15 2016-03-08 かしま野管理サービス株式会社 風洞回転羽根

Family Cites Families (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3018678A1 (de) * 1980-05-16 1981-11-26 Günter Dipl.-Ing. Dr. 2282 List Wagner Windzypresse
US4365934A (en) * 1981-06-15 1982-12-28 Mason H Carl Wind machine
DE58903163D1 (de) * 1988-10-03 1993-02-11 Josef Moser Windgetriebener rotor.
US6379115B1 (en) * 1999-08-02 2002-04-30 Tetsuo Hirai Windmill and windmill control method
GB2374122A (en) * 2001-04-03 2002-10-09 David Mcknight Wind turbine disguised as a tree
WO2007076837A2 (fr) * 2005-12-23 2007-07-12 Lars Gunnar Liebchen Installation en plusieurs partie pour la mise en valeur d'energie produite par le vent et les courants marins
US7918646B2 (en) * 2007-01-22 2011-04-05 Lonestar Inventions LLP High efficiency turbine with variable attack angle foils
JP2009002214A (ja) * 2007-06-21 2009-01-08 Seven Stars Worldwide Ltd 気動力式自動風向き追跡の風車
WO2009075865A2 (fr) * 2007-12-11 2009-06-18 Vinci-Tech Inc. Eolienne à axe vertical avec pales pour rediriger un écoulement d'air
KR20090106270A (ko) * 2008-04-04 2009-10-08 정갑태 슬라이드식 회전 블레이드를 이용한 풍력발전장치
RU2539945C2 (ru) * 2009-04-14 2015-01-27 Реджин КУИНТАЛ Горизонтальная ветросиловая турбина
KR20110004113A (ko) * 2009-07-07 2011-01-13 허정 수력 또는 풍력 발전기의 수직회전자
KR100999320B1 (ko) * 2010-04-23 2010-12-08 손정희 양력발전기용 양력블레이드 및 그의 제조방법

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO2011132130A1 *

Also Published As

Publication number Publication date
ITTO20100317A1 (it) 2011-10-20
IT1399974B1 (it) 2013-05-09
WO2011132130A1 (fr) 2011-10-27

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