EP2137405A2 - Innovative horizontal axis wind turbine of high efficiency - Google Patents

Innovative horizontal axis wind turbine of high efficiency

Info

Publication number
EP2137405A2
EP2137405A2 EP08719104A EP08719104A EP2137405A2 EP 2137405 A2 EP2137405 A2 EP 2137405A2 EP 08719104 A EP08719104 A EP 08719104A EP 08719104 A EP08719104 A EP 08719104A EP 2137405 A2 EP2137405 A2 EP 2137405A2
Authority
EP
European Patent Office
Prior art keywords
row
blades
wind turbine
rotating
stationary
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Withdrawn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
EP08719104A
Other languages
German (de)
French (fr)
Inventor
Konstantinos Chatjianastasiou
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.)
Bosa SA
Original Assignee
Bosa SA
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 Bosa SA filed Critical Bosa SA
Publication of EP2137405A2 publication Critical patent/EP2137405A2/en
Withdrawn legal-status Critical Current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
    • 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 
    • 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
    • F03D13/00—Assembly, mounting or commissioning of wind motors; Arrangements specially adapted for transporting wind motor components
    • F03D13/20—Arrangements for mounting or supporting wind motors; Masts or towers for wind motors
    • 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
    • F03D7/00—Controlling wind motors 
    • 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
    • F05B2240/13—Stators to collect or cause flow towards or away from turbines
    • 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
    • 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
    • Y02E10/728—Onshore wind turbines

Definitions

  • Subject invention is referred to horizontal axis, wind turbines, which include a rotor (7) absorbing energy from the wind, and through a gear-box rotate a generator.
  • Gear box and Generator (8) are housed either as horizontal extension of the power shaft (6), or at an angle decline to it.
  • Subject invention is characterized of the use of an innovative high efficiency rotor, providing high power to volume ratio, compared with existing designs.
  • Rotor is made up of two rows of blades, the Stationary and the Rotating one.
  • Stationary row (1) consists of a number of suitable blades installed to the peripheries of two rings, the external of which can be supported in a fixed base(9).
  • Rotating row (2) consists of another independent row of suitable blades fixed to the periphery of a rotating disc (10), connected at its center to the power shaft (6), that drives the generator through a mechanical train.
  • a cone (3) may cover the internal ring in the stationary row, the external ring of which can be extended backwards, leaving a small gap (4) to rotating blades.
  • a typical row of stationary (2) / rotating (1) blades is shown in fig. -3. Air flow, passed through each nozzle (5), made up of two successive blades of the stationary row, is enhanced, before impacts to corresponding blade of the rotating row, transmitting momentum to the power shaft (6), causing it to rotate.
  • the number of stationary / rotating blades vary in accordance to rotor diameter.
  • Shaft rotation may be multiplied, via a mechanical train to the required level to match the generator input, housed either to the bottom of the system
  • Yaw control is accomplished either passively or with an active drive.
  • Such a wind turbine presents following advantages.
  • An order of magnitude higher performance coefficient compared to single row of blades conventional wind-turbines, offering therefore same output, with much smaller swept area. Operates in a wider range of wind-speed, requiring lower cut-in wind speed
  • FIG-4 the innovative rotor, powers the generator under an approximate angle of 90°.
  • Figure-5 the generator is fed at an extension of the horizontal power shaft.
  • Figure-1 is a front view of the innovative rotor whose sections AA and BB are given in figures 2 and 3 respectively.

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

Horizontal axis wind turbine, characterized of the use of an innovative rotor (7), achieving high power to volume ratio, compared to single row of blades, conventional, horizontal axis wind turbines. The innovative rotor is made up of two rows of blades the stationary, first row (1) and the rotating second one (2). The blade superposition of the first row generates a series of nozzles (5) of suitable cross sections that accelerate the air-flow, which impacts the blades of second row, with optimum angle, causing the power shaft (6) to rotate. Furthermore the so produced energy is transferred classically through a gear-box to the generator.

Description

Innovative Horizontal axis wind turbine of high efficiency
Subject invention, is referred to horizontal axis, wind turbines, which include a rotor (7) absorbing energy from the wind, and through a gear-box rotate a generator. Gear box and Generator (8) are housed either as horizontal extension of the power shaft (6), or at an angle decline to it.
Subject invention is characterized of the use of an innovative high efficiency rotor, providing high power to volume ratio, compared with existing designs.
Rotor is made up of two rows of blades, the Stationary and the Rotating one.
Stationary row (1) consists of a number of suitable blades installed to the peripheries of two rings, the external of which can be supported in a fixed base(9).
Rotating row (2) consists of another independent row of suitable blades fixed to the periphery of a rotating disc (10), connected at its center to the power shaft (6), that drives the generator through a mechanical train.
A cone (3) may cover the internal ring in the stationary row, the external ring of which can be extended backwards, leaving a small gap (4) to rotating blades.
A typical row of stationary (2) / rotating (1) blades is shown in fig. -3. Air flow, passed through each nozzle (5), made up of two successive blades of the stationary row, is enhanced, before impacts to corresponding blade of the rotating row, transmitting momentum to the power shaft (6), causing it to rotate.
The number of stationary / rotating blades, vary in accordance to rotor diameter.
Shaft rotation may be multiplied, via a mechanical train to the required level to match the generator input, housed either to the bottom of the system
(with an angle decline of mechanical train) or at the top (as horizontal extension of the power shaft).
Yaw control is accomplished either passively or with an active drive. Such a wind turbine, as described above, presents following advantages. An order of magnitude higher performance coefficient compared to single row of blades conventional wind-turbines, offering therefore same output, with much smaller swept area. Operates in a wider range of wind-speed, requiring lower cut-in wind speed
Pitch regulation is not required
Much lower overall weight Easiness of installation, with minimal environmental impact due to reduced volume.
In attached Figures 4 and 5 are given two applications of the invention.
In Figure-4, the innovative rotor, powers the generator under an approximate angle of 90°. In Figure-5 the generator is fed at an extension of the horizontal power shaft. Figure-1 is a front view of the innovative rotor whose sections AA and BB are given in figures 2 and 3 respectively.

Claims

1. Horizontal axis wind turbine, characterized of the use of a rotor (7) made up of two rows of blades, one stationary - no rotating - row (1) and another rotating row (2), arranged and operating as following. Air flow, passed through multiple nozzles (5) made up of two successive blades of the stationary row is enhanced before impacting to corresponding blades of rotating row at an optimum angle, transmitting momentum to the power shaft (6), causing it to rotate.
Said, stationary row (1) consists of a number of suitable blades installed to the peripheries of two rings, the external of which can be supported by the tower (9).
Said, rotating row (2) consists of another independent row of suitable blades, fixed to the periphery of a rotating disc (10), connected at its center to the power shaft (6) that drives the generator through a mechanical train. Said, rotor (7) is exposed directly to air stream, with no intervention of inlet profile and/or diffuser.
2. A wind-turbine according to claim 1 wherein said stationary and/or rotating row cover the maximum possible cross sectional area of wind turbine, therefore the internal ring diameter, is kept to the minimum required size, to accommodate only the blades fixed to it.
3. A wind turbine according to claim 1 wherein said rows of blades are not fixed to any type of inlet aerodynamic profile or generator casing but to the said internal ring/ rotating disc.
4. A wind turbine according to claim 1 wherein power train composed of Gear box/ generator(δ) is housed externally of rotor(7)
5. A wind turbine according to claim 4 wherein said blades of stationary row are airfoils with trailing edge extended forward.
6. A wind turbine according to claim 1 wherein overall efficiency does solely depend on flow enhancement generated through the arrangement of said multiple nozzles(5) and the optimum transfer of it to rotating row(2) leading to an order of magnitude higher output compared to conventional windmills and contrary to so called theoretical BeIz - limit.
EP08719104A 2007-03-30 2008-03-27 Innovative horizontal axis wind turbine of high efficiency Withdrawn EP2137405A2 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GR20070100193A GR1005872B (en) 2007-03-30 2007-03-30 Horizontal axis, wind turbine, using a rotor consisting of two rows of blades ( a station and a rotating one).
PCT/GR2008/000020 WO2008120026A2 (en) 2007-03-30 2008-03-27 Innovative horizontal axis wind turbine of high efficiency

Publications (1)

Publication Number Publication Date
EP2137405A2 true EP2137405A2 (en) 2009-12-30

Family

ID=39477529

Family Applications (1)

Application Number Title Priority Date Filing Date
EP08719104A Withdrawn EP2137405A2 (en) 2007-03-30 2008-03-27 Innovative horizontal axis wind turbine of high efficiency

Country Status (3)

Country Link
EP (1) EP2137405A2 (en)
GR (1) GR1005872B (en)
WO (1) WO2008120026A2 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2180181A1 (en) * 2008-10-23 2010-04-28 Jia-Yuan Lee Rotor structure of wind turbine
GB2466209A (en) * 2008-12-11 2010-06-16 Vestas Wind Sys As Wind turbine wake expansion device

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA1109800A (en) * 1975-07-10 1981-09-29 Oliver C. Eckel Wind turbine
US4075500A (en) * 1975-08-13 1978-02-21 Grumman Aerospace Corporation Variable stator, diffuser augmented wind turbine electrical generation system
SE430529B (en) * 1982-12-30 1983-11-21 Vindkraft Goeteborg Kb DEVICE FOR WIND TURBINES
US6887031B1 (en) * 2004-03-16 2005-05-03 Angus J. Tocher Habitat friendly, pressure conversion, wind energy extraction
CA2467199A1 (en) * 2004-05-19 2005-11-19 Bud T.J. Johnson Wind turbine
US7214029B2 (en) * 2004-07-01 2007-05-08 Richter Donald L Laminar air turbine

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO2008120026A2 *

Also Published As

Publication number Publication date
WO2008120026A2 (en) 2008-10-09
WO2008120026A3 (en) 2009-05-14
GR1005872B (en) 2008-04-15
WO2008120026A4 (en) 2009-06-25

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