EP3334927A1 - Éolienne - Google Patents

Éolienne

Info

Publication number
EP3334927A1
EP3334927A1 EP16775872.1A EP16775872A EP3334927A1 EP 3334927 A1 EP3334927 A1 EP 3334927A1 EP 16775872 A EP16775872 A EP 16775872A EP 3334927 A1 EP3334927 A1 EP 3334927A1
Authority
EP
European Patent Office
Prior art keywords
rotor
wind turbine
stator
tunnel
flow
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Withdrawn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
EP16775872.1A
Other languages
German (de)
English (en)
Inventor
Freerk JAARSMA
Harm Antonius VREDENBURG
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of EP3334927A1 publication Critical patent/EP3334927A1/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Withdrawn legal-status Critical Current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
    • F03D1/00—Wind motors with rotation axis substantially parallel to the air flow entering the rotor 
    • F03D1/04—Wind motors with rotation axis substantially parallel to the air flow entering the rotor  having stationary wind-guiding means, e.g. with shrouds or channels
    • 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
    • F05B2240/10—Stators
    • F05B2240/12—Fluid guiding means, e.g. vanes
    • 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
    • F05B2240/10—Stators
    • F05B2240/12—Fluid guiding means, e.g. vanes
    • F05B2240/122—Vortex generators, turbulators, or the like, for mixing
    • 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
    • F05B2240/10—Stators
    • F05B2240/13—Stators to collect or cause flow towards or away from turbines
    • 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
    • F05B2240/10—Stators
    • F05B2240/13—Stators to collect or cause flow towards or away from turbines
    • F05B2240/133—Stators to collect or cause flow towards or away from turbines with a convergent-divergent guiding structure, e.g. a Venturi conduit
    • 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

Definitions

  • Wind energy appears in the short term to be the most promising. Wind energy can in principle be produced almost anywhere in the world. The most significant drawback of wind energy is that the speed of the wind just above the ground is limited so that wind turbines at high locations are necessary for an efficient energy generation. Furthermore, the power generated increases with the surface area covered by the blades of a wind turbine, so by the square of the length of the blades, this being an additional reason for opting for large wind turbines. Various factors result in the wind turbines being very conspicuously present in the landscape, thereby limiting their social acceptance. The rotating blades of a wind turbine moreover cause a considerable noise nuisance, and an annoying cast shadow when the sun shines.
  • a vortex flow in the form of a helical vortex is created downstream of the stator.
  • the strength of the vortex flow is inversely proportional to the distance from the longitudinal axis, apart from the flow in the boundary layers along the inner side of the tunnel and along the periphery of the hub.
  • This vortex flow provides for an optimal approach flow to the rotor.
  • the tunnel preferably has a converging inlet in which the stator is accommodated. The stator is thus situated some distance upstream of the rotor, whereby the vortex flow can develop to sufficient extent before reaching the rotor, and wakes coming from the stator vanes have already weakened to some extent because of helix formation.
  • Fig. 1 is a longitudinal section through a wind turbine according to the invention
  • the diagram of fig. 6 shows clearly that considerably higher powers can be achieved with the wind turbine according to the invention than with an unducted or bare turbine with the same rotor dimensions.
  • a resistance coefficient of C D 0.02 - which can certainly be achieved in practice - it is already possible to extract three times as much power from the airflow, for instance with a diffuser with an outflow area A5 which amounts to six times the surface area AR covered by the rotor, as is possible with a bare turbine.
  • the power coefficient C P is at a maximum when the aerodynamic load per unit of area of rotor 2 - also referred to as disk loading - is relatively low. The maximums occur particularly at relatively low values of the load coefficient, in the order of C T ⁇ 0.1 - 0.2.
  • a range of promising combinations of C D and A 5R is shown hatched in the diagram.
  • the wind turbine 1 according to the invention is considerably more efficient than conventional, unducted wind turbines and can produce up to four times as much power per unit of rotor area.
  • the greatest diameter of the rear tunnel segment 12 is still considerably smaller here than the diameter of an equivalent unducted wind turbine.
  • the wind turbine 1 according to the invention is aimed particularly at small-scale energy generation, for instance in private households, for farmers and in small and medium-sized companies. In such applications the diameter of rotor 2 can vary from 1 to 4 metres, and the generated power will lie between 1 and 14 kW at wind force 5 Bf.

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)
  • Wind Motors (AREA)

Abstract

L'invention concerne une éolienne comprenant un rotor et un stator placé en amont de celui-ci. Le rotor et le stator sont logés selon l'invention dans un tunnel ayant une forme divergente en aval du rotor, en particulier une forme divergeant progressivement. Le stator peut comprendre un certain nombre d'aubes de stator fixes avec une section de production d'un écoulement tourbillonnaire dans le tunnel. Le rotor peut comprendre un certain nombre de pales de rotor rotatives présentant une section et une torsion adaptées à cet écoulement tourbillonnaire. L'éolienne peut être pourvue d'un corps central profilé s'étendant depuis l'entrée vers le rotor au niveau de la position de l'axe longitudinal et portant le stator et le rotor, et un passage s'étendant dans la direction axiale peut être formé dans le corps central.
EP16775872.1A 2015-08-11 2016-08-11 Éolienne Withdrawn EP3334927A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
NL2015290A NL2015290B1 (nl) 2015-08-11 2015-08-11 Windturbine.
PCT/NL2016/050573 WO2017026894A1 (fr) 2015-08-11 2016-08-11 Éolienne

Publications (1)

Publication Number Publication Date
EP3334927A1 true EP3334927A1 (fr) 2018-06-20

Family

ID=55273460

Family Applications (1)

Application Number Title Priority Date Filing Date
EP16775872.1A Withdrawn EP3334927A1 (fr) 2015-08-11 2016-08-11 Éolienne

Country Status (3)

Country Link
EP (1) EP3334927A1 (fr)
NL (1) NL2015290B1 (fr)
WO (1) WO2017026894A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111089029A (zh) * 2018-10-24 2020-05-01 北京金风科创风电设备有限公司 风力发电机组的导流装置及其控制方法、风力发电机组

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20180266390A1 (en) * 2013-03-14 2018-09-20 Hover Energy, LLC Wind power generating rotor with diffuser or diverter system for a wind turbine
EP3935278A1 (fr) 2019-03-08 2022-01-12 Big Moon Power, Inc. Systèmes et procédés de production d'énergie hydro-électrique

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AUPQ085299A0 (en) * 1999-06-08 1999-07-01 Smith, Bruce Justin Diffuser augmented wind turbine
WO2007107505A1 (fr) * 2006-03-21 2007-09-27 Shell Internationale Research Maatschappij B.V. Ensemble turbine et generateur
WO2007148826A1 (fr) * 2006-06-21 2007-12-27 Honda Motor Co., Ltd. Générateur d'énergie éolienne
US20140301824A1 (en) * 2011-06-14 2014-10-09 Zhi-Xuan YU Wind power generation apparatus

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111089029A (zh) * 2018-10-24 2020-05-01 北京金风科创风电设备有限公司 风力发电机组的导流装置及其控制方法、风力发电机组

Also Published As

Publication number Publication date
WO2017026894A1 (fr) 2017-02-16
NL2015290B1 (nl) 2017-02-28

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