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US20130081342A1 - Wind turbine tower - Google Patents

Wind turbine tower Download PDF

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Publication number
US20130081342A1
US20130081342A1 US13/629,920 US201213629920A US2013081342A1 US 20130081342 A1 US20130081342 A1 US 20130081342A1 US 201213629920 A US201213629920 A US 201213629920A US 2013081342 A1 US2013081342 A1 US 2013081342A1
Authority
US
United States
Prior art keywords
wind turbine
fibre rovings
turbine tower
tower
fibre
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.)
Abandoned
Application number
US13/629,920
Inventor
Karsten Schibsbye
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.)
Siemens AG
Original Assignee
Siemens AG
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 Siemens AG filed Critical Siemens AG
Assigned to SIEMENS WIND POWER A/S reassignment SIEMENS WIND POWER A/S ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: SCHIBSBYE, KARSTEN
Assigned to SIEMENS AKTIENGESELLSCHAFT reassignment SIEMENS AKTIENGESELLSCHAFT ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: SIEMENS WIND POWER A/S
Publication of US20130081342A1 publication Critical patent/US20130081342A1/en
Priority to US14/271,876 priority Critical patent/US9567981B2/en
Abandoned legal-status Critical Current

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Classifications

    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
    • E04C5/00—Reinforcing elements, e.g. for concrete; Auxiliary elements therefor
    • E04C5/07—Reinforcing elements of material other than metal, e.g. of glass, of plastics, or not exclusively made of metal
    • 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
    • F03D80/00—Details, components or accessories not provided for in groups F03D1/00 - F03D17/00
    • F03D80/80—Arrangement of components within nacelles or towers
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04H—BUILDINGS OR LIKE STRUCTURES FOR PARTICULAR PURPOSES; SWIMMING OR SPLASH BATHS OR POOLS; MASTS; FENCING; TENTS OR CANOPIES, IN GENERAL
    • E04H12/00—Towers; Masts or poles; Chimney stacks; Water-towers; Methods of erecting such structures
    • E04H12/02—Structures made of specified materials
    • E04H12/12—Structures made of specified materials of concrete or other stone-like material, with or without internal or external reinforcements, e.g. with metal coverings, with permanent form elements
    • 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
    • F05B2240/90—Mounting on supporting structures or systems
    • F05B2240/91—Mounting on supporting structures or systems on a stationary structure
    • F05B2240/912—Mounting on supporting structures or systems on a stationary structure on a tower
    • 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
    • F05B2280/00—Materials; Properties thereof
    • F05B2280/60—Properties or characteristics given to material by treatment or manufacturing
    • F05B2280/6013—Fibres
    • 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
    • F05B2280/00—Materials; Properties thereof
    • F05B2280/70—Treatments or modification of materials
    • F05B2280/702—Reinforcements
    • 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

  • the illustrated embodiments relate to a wind turbine tower.
  • Wind turbine towers especially tubular steel towers for large wind turbines, are large in diameter and weight. This may cause difficulties concerning the transportation of a tower to the wind farm and the used infrastructure.
  • Slip forming for construction is a method of continuously pouring concrete into a form of mould that moves up vertically, normally with the assistance of hydraulic or screw jacks. As the forming of the structure progress, the section of previously poured concrete hardens and forms a kind of support wall that is strong enough to withstand the concrete poured over the top of it. Pouring continues until the desired height of the structure is reached, allowing for a type of concrete structure that is positioned on top of a foundation and completely hollow inside.
  • U.S. Pat. No. 4,314,798 illustrate such a slip forming system.
  • slip forming process is known in the art as being used to build wind turbine towers.
  • the casted concrete structure may comprise solid iron or stainless steel bars or grids for reinforcement.
  • Fibers are also known to use fibers as reinforcement of concrete in wind turbine towers. US2009/0307998 is one such example.
  • the Fiber Reinforced Concrete (FRC) is a technology which can be used together with different types of fibers such as plastics, metal, glass etc. Normally chopped fibers are mixed with the concrete to enhance the tensile properties.
  • the technical problem which is solved by the illustrated embodiments may be regarded as the provision of an improved concrete wind turbine tower with lower weight and same strength as known concrete wind turbine towers.
  • the embodiments relate to a reinforced concrete wind turbine tower comprising fibre rovings as reinforcement.
  • the fibre rovings are glass fibre rovings, armid fibre rovings and/or carbon fibre rovings.
  • a glass fiber roving is a bundle of multiple parallel oriented glass fibers its shape being similar to a thin rope.
  • the carbon fibre diameter is in the range of 5 ⁇ m to 10 ⁇ m, and/or the number of carbon fibres in the roving is between 5000 and 30000, and/or the glass fibre diameter is in the range between 10 ⁇ m and 30 ⁇ m, and/or the number of glass fibres in the roving is between 500 and 2000, and/or the fibre roving weight is between 0.20 and 30 kg/km.
  • the fibre rovings will be embedded in concrete during the slip forming process.
  • the fibre rovings are anchored in the concrete already at the bottom of the tower and it ends at the top of the tower.
  • some of the fibre rovings will be “winded” around the tower, e.g. in an ⁇ 25 deg. angle relative to the longitudinal (vertical) axis of the tower.
  • some of the fibre rovings will be embedded in e.g. 85 deg. angle relative to the longitudinal axis so that they basically follow the circumference of the tower.
  • the rovings may also be placed in the concrete in a 0 deg. angle relative to the longitudinal axis of the tower.
  • fibre rovings may be placed in other paths in order to cope with the intensive tensions and stresses which act on this part of the tower.
  • the rovings or fibre rovings are “pre-tensioned” when placed in the concrete during the slip moulding process in order not to create any wrinkles on the rovings or in order to strengthen the tower.
  • the fibre rovings can be embedded as a supplement to conventional iron bar reinforcement or the conventional iron bar reinforcement can be embedded as a supplement to fibre rovings.
  • the glass fibers have higher tensile strength than steel or iron and are even cheaper.
  • rovings are flexible and can be delivered on drums in desired lengths and they are thereby very easy to handle—especially compared to conventional reinforcement steel rods which are solid, un-flexible and difficult to handle.
  • Wind turbine towers with fibre reinforced concrete can achieve a height of 120 m and more.
  • FIG. 1 shows a schematical side view of a wind turbine tower with of the positions and directions in which the fibre rovings will be positioned
  • FIG. 1 shows a schematical side view of a wind turbine tower 1 made of reinforced concrete 3 .
  • the reinforced concrete 3 of the a wind turbine tower 1 has as reinforcements fibre rovings 2 , 8 , 9 , 10 as reinforcements.
  • the fibre rovings 2 , 8 , 9 , 10 are shown in different positions and directions in which the fibre rovings fibre rovings 2 , 8 , 9 , 10 can be positioned.
  • the different positions and directions of the fibre rovings 2 , 8 , 9 , 10 are shown as example and can be combined deliberately to create different optimized embodiments of the wind turbine tower 1 . Alternatevely, only one position and/or direction of the shown fibre rovings 2 , 8 , 9 , 10 can be chosen for the whole wind turbine tower 1 .
  • the fibre rovings 2 , 8 , 9 , 10 nay be glass fibre rovings 2 , but can also consist of carbon fibre rovings 2 , 8 , 9 , 10 .
  • a fibre roving 2 , 8 , 9 , 10 is a bundle of multiple parallel oriented fibers with around 200 fibers forming a thin rope.
  • the tower 1 is produced in a slip forming process or slip moulding process.
  • Slip forming for construction is a method of continuously pouring concrete into a form of mould that moves up vertically, normally with the assistance of hydraulic or screw jacks. As the forming of the tower structure progress, the section of previously poured concrete hardens and forms a kind of support wall that is strong enough to withstand the concrete poured over the top of it. Pouring continues until the desired height of the structure is reached, allowing for a type of concrete structure that is positioned on top of a foundation and completely hollow inside.
  • the fibre rovings 2 , 8 , 9 , 10 will be embedded in the concrete 3 during the slip forming process.
  • the fibre rovings 2 , 8 , 9 , 10 can be anchored in the concrete 3 at the bottom 5 and at the top 4 of the wind turbine tower 1 .
  • Some fibre rovings 2 , 8 , 9 , 10 are winded around the wind turbine tower 1 in a given angle ⁇ , ⁇ relative to the longitudinal (vertical) axis A of the wind turbine tower 1
  • Some fibre rovings 10 are placed in the concrete 3 in a zero degree angle relative to the longitudinal axis A of the tower 1 , optionally under pretension.
  • the tower 1 adapts to either a yaw-construction or to some transition piece 11 between the tower 1 and the yaw-construction 11 .
  • the fibre rovings 12 are placed in paths in order to cope with the intensive tensions and stresses which act on this part of the tower 1 .
  • the fibre rovings 2 , 8 , 9 , 10 are pre-tensioned when placed in the concrete 3 during the slip moulding process in order not to create any wrinkles on the rovings or in order to stabilise the tower 1 .
  • the fibre rovings 2 , 8 , 9 , 10 can be embedded as a supplement to conventional iron bar reinforcement 6 or the conventional iron bar reinforcement 6 can be embedded as a supplement to the fibre rovings 2 .

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  • Engineering & Computer Science (AREA)
  • Architecture (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)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Wind Motors (AREA)

Abstract

A wind turbine tower is made of reinforced concrete with fibre rovings as reinforcements. The fibre rovings may include, for example, glass fibre rovings, or armid fibre rovings, or carbon fibre rovings. The fibre rovings may comprise, for example, a bundle of multiple parallel oriented fibers forming a thin rope.

Description

    CROSS REFERENCE TO RELATED APPLICATIONS
  • This application claims priority of European Patent Office application No. 11183465.1 filed Sep. 30, 2011. All of the applications are incorporated by reference herein in their entirety.
    • FIELD OF INVENTION
  • The illustrated embodiments relate to a wind turbine tower.
    • BACKGROUND OF INVENTION
  • Wind turbine towers, especially tubular steel towers for large wind turbines, are large in diameter and weight. This may cause difficulties concerning the transportation of a tower to the wind farm and the used infrastructure.
  • Slip forming for construction is a method of continuously pouring concrete into a form of mould that moves up vertically, normally with the assistance of hydraulic or screw jacks. As the forming of the structure progress, the section of previously poured concrete hardens and forms a kind of support wall that is strong enough to withstand the concrete poured over the top of it. Pouring continues until the desired height of the structure is reached, allowing for a type of concrete structure that is positioned on top of a foundation and completely hollow inside. U.S. Pat. No. 4,314,798 illustrate such a slip forming system.
  • The slip forming process is known in the art as being used to build wind turbine towers.
  • The casted concrete structure may comprise solid iron or stainless steel bars or grids for reinforcement.
  • It is also known to use fibers as reinforcement of concrete in wind turbine towers. US2009/0307998 is one such example. The Fiber Reinforced Concrete (FRC) is a technology which can be used together with different types of fibers such as plastics, metal, glass etc. Normally chopped fibers are mixed with the concrete to enhance the tensile properties.
    • SUMMARY OF INVENTION
  • It is desirable to provide a wind turbine tower with prolonged lifetime and reduced costs.
  • This objective is solved by the features of the independent claim(s).
  • The depending claims define further embodiments.
  • The technical problem which is solved by the illustrated embodiments may be regarded as the provision of an improved concrete wind turbine tower with lower weight and same strength as known concrete wind turbine towers.
  • The embodiments relate to a reinforced concrete wind turbine tower comprising fibre rovings as reinforcement.
  • In one embodiment, the fibre rovings are glass fibre rovings, armid fibre rovings and/or carbon fibre rovings.
  • A glass fiber roving is a bundle of multiple parallel oriented glass fibers its shape being similar to a thin rope.
  • In one embodiment, the carbon fibre diameter is in the range of 5 μm to 10 μm, and/or the number of carbon fibres in the roving is between 5000 and 30000, and/or the glass fibre diameter is in the range between 10 μm and 30 μm, and/or the number of glass fibres in the roving is between 500 and 2000, and/or the fibre roving weight is between 0.20 and 30 kg/km.
  • In one embodiment, the fibre rovings will be embedded in concrete during the slip forming process.
  • In one embodiment, the fibre rovings are anchored in the concrete already at the bottom of the tower and it ends at the top of the tower.
  • In one embodiment, some of the fibre rovings will be “winded” around the tower, e.g. in an ±25 deg. angle relative to the longitudinal (vertical) axis of the tower.
  • In one embodiment, some of the fibre rovings will be embedded in e.g. 85 deg. angle relative to the longitudinal axis so that they basically follow the circumference of the tower.
  • In one embodiment, the rovings may also be placed in the concrete in a 0 deg. angle relative to the longitudinal axis of the tower.
  • At the top of the tower, where the tower has to adapt to either a yaw-construction or to some transition piece between the tower and the yaw-construction, fibre rovings may be placed in other paths in order to cope with the intensive tensions and stresses which act on this part of the tower.
  • In one embodiment, the rovings or fibre rovings are “pre-tensioned” when placed in the concrete during the slip moulding process in order not to create any wrinkles on the rovings or in order to strengthen the tower.
  • In one embodiment, the fibre rovings can be embedded as a supplement to conventional iron bar reinforcement or the conventional iron bar reinforcement can be embedded as a supplement to fibre rovings.
  • By providing that fibre rovings are lighter than the corresponding iron bars, the whole tower construction will resultantly become lighter than conventional.
  • By providing that (glass) fiber rovings do not corrode, the properties of the tower will be maintained during the lifetime. Furthermore the lifetime is prolonged.
  • The glass fibers have higher tensile strength than steel or iron and are even cheaper.
  • An even further feature is that rovings are flexible and can be delivered on drums in desired lengths and they are thereby very easy to handle—especially compared to conventional reinforcement steel rods which are solid, un-flexible and difficult to handle.
  • Wind turbine towers with fibre reinforced concrete can achieve a height of 120 m and more.
    • BRIEF DESCRIPTION OF THE DRAWINGS
  • Further features, properties and advantages will become clear from the following description of embodiments in conjunction with the accompanying drawing, wherein:
  • FIG. 1: shows a schematical side view of a wind turbine tower with of the positions and directions in which the fibre rovings will be positioned
    •  DETAILED DESCRIPTION OF INVENTION
  • FIG. 1 shows a schematical side view of a wind turbine tower 1 made of reinforced concrete 3.
  • The reinforced concrete 3 of the a wind turbine tower 1 has as reinforcements fibre rovings 2,8,9,10 as reinforcements. In FIG. 1, the fibre rovings 2,8,9,10 are shown in different positions and directions in which the fibre rovings fibre rovings 2,8,9,10 can be positioned. The different positions and directions of the fibre rovings 2,8,9,10 are shown as example and can be combined deliberately to create different optimized embodiments of the wind turbine tower 1. Alternatevely, only one position and/or direction of the shown fibre rovings 2,8,9,10 can be chosen for the whole wind turbine tower 1.
  • The fibre rovings 2,8,9,10 nay be glass fibre rovings 2, but can also consist of carbon fibre rovings 2,8,9,10. A fibre roving 2,8,9,10 is a bundle of multiple parallel oriented fibers with around 200 fibers forming a thin rope.
  • The tower 1 is produced in a slip forming process or slip moulding process. Slip forming for construction is a method of continuously pouring concrete into a form of mould that moves up vertically, normally with the assistance of hydraulic or screw jacks. As the forming of the tower structure progress, the section of previously poured concrete hardens and forms a kind of support wall that is strong enough to withstand the concrete poured over the top of it. Pouring continues until the desired height of the structure is reached, allowing for a type of concrete structure that is positioned on top of a foundation and completely hollow inside. The fibre rovings 2,8,9,10 will be embedded in the concrete 3 during the slip forming process.
  • The fibre rovings 2,8,9,10 can be anchored in the concrete 3 at the bottom 5 and at the top 4 of the wind turbine tower 1.
  • Some fibre rovings 2,8,9,10 are winded around the wind turbine tower 1 in a given angle α, β relative to the longitudinal (vertical) axis A of the wind turbine tower 1
  • Some fibre rovings 8 are in an angle of α=±25 degree.
  • Some fibre rovings are in an angle of β=±85 degree so that they basically follow the circumference of the tower wind turbine tower 1.
  • Some fibre rovings 10 are placed in the concrete 3 in a zero degree angle relative to the longitudinal axis A of the tower 1, optionally under pretension.
  • At the top 4 of the wind turbine tower 1, the tower 1 adapts to either a yaw-construction or to some transition piece 11 between the tower 1 and the yaw-construction 11.
  • The fibre rovings 12 are placed in paths in order to cope with the intensive tensions and stresses which act on this part of the tower 1.
  • The fibre rovings 2,8,9,10 are pre-tensioned when placed in the concrete 3 during the slip moulding process in order not to create any wrinkles on the rovings or in order to stabilise the tower 1.
  • The fibre rovings 2,8,9,10 can be embedded as a supplement to conventional iron bar reinforcement 6 or the conventional iron bar reinforcement 6 can be embedded as a supplement to the fibre rovings 2.

Claims (14)

1. A wind turbine tower comprising,
reinforced concrete with fibre rovings as reinforcements.
2. The wind turbine tower according to claim 1, wherein the fibre rovings are glass fibre rovings, armid fibre rovings, or carbon fibre rovings.
3. The wind turbine tower according to claim 1, wherein the fibre rovings is a bundle of multiple parallel oriented fibers.
4. The wind turbine tower according to claim 3, wherein the fibre rovings are carbon fibre rovings, and wherein
the carbon fibre diameter is in the range of 5 μm to 10 μm, and/or
the number of carbon fibres in the roving is between 5000 and 30000, and/or
the glass fibre diameter is in the range between 10 μm and 30 μm, and/or
the number of glass fibres in the roving is between 500 and 2000, and/or
the fibre roving weight is between 0.20 and 30 kg/km.
5. The wind turbine tower according to claim 1, wherein
the tower is produced in a slip forming process or slip moulding process,
the fibre rovings are embedded in the concrete during the slip forming process.
6. The wind turbine tower according to claim 1, wherein the fibre rovings are anchored in the concrete already at the bottom of the wind turbine tower and it ends at the top of the wind turbine tower.
7. The wind turbine tower according to claim 1, wherein at least some of the fibre rovings are wound around the wind turbine tower in a first angle relative to the longitudinal axis of the tower.
8. The wind turbine tower according to claim 7, wherein said first angle is an angle of ±25 degree.
9. The wind turbine tower according to claim 1, wherein at least some of the fibre rovings are wound around the wind turbine tower in a second angle relative to the longitudinal axis of the tower.
10. The wind turbine tower according to claim 9, wherein said second angle is ±85 degree, so that the fibre rovings generally follow the circumference of the tower.
11. The wind turbine tower according claim 1, wherein at least some of the fibre rovings are placed in the concrete in a zero degree angle relative to the longitudinal axis of the tower.
12. The wind turbine tower according to claim 1, wherein
at the top of the tower, the tower adapts to either a yaw-construction or to some transition piece between the tower and the yaw-construction, and
fibre rovings are placed in paths in order to cope with the intensive tensions and stresses which act on this part of the tower.
13. The wind turbine tower according claim 1, wherein the fibre rovings are pre-tensioned when placed in the concrete during the slip moulding process in order not to create any wrinkles on the fibre rovings or to stabilise the tower.
14. The wind turbine tower according to claim 1, wherein the fibre rovings are configured to be embedded as a supplement to conventional iron bar reinforcement, or the conventional iron bar reinforcement is configured to be embedded as a supplement to the fibre rovings.
US13/629,920 2011-09-30 2012-09-28 Wind turbine tower Abandoned US20130081342A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US14/271,876 US9567981B2 (en) 2011-09-30 2014-05-07 Wind turbine tower and method of production thereof

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP11183465.1 2011-09-30
EP11183465.1A EP2574705B1 (en) 2011-09-30 2011-09-30 Wind turbine tower

Related Child Applications (1)

Application Number Title Priority Date Filing Date
US14/271,876 Continuation-In-Part US9567981B2 (en) 2011-09-30 2014-05-07 Wind turbine tower and method of production thereof

Publications (1)

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US20130081342A1 true US20130081342A1 (en) 2013-04-04

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US (1) US20130081342A1 (en)
EP (1) EP2574705B1 (en)
BR (1) BR102012024802A2 (en)
DK (1) DK2574705T3 (en)

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EP2942453A1 (en) * 2014-05-05 2015-11-11 Siemens Aktiengesellschaft Wind turbine tower, and method of production thereof

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