GB2491213A - Underwater turbine blade - Google Patents

Underwater turbine blade Download PDF

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Publication number
GB2491213A
GB2491213A GB201116255A GB201116255A GB2491213A GB 2491213 A GB2491213 A GB 2491213A GB 201116255 A GB201116255 A GB 201116255A GB 201116255 A GB201116255 A GB 201116255A GB 2491213 A GB2491213 A GB 2491213A
Authority
GB
Grant status
Application
Patent type
Prior art keywords
waterproof
wood
turbine blade
material
formed
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Withdrawn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
GB201116255A
Other versions
GB201116255D0 (en )
Inventor
Nick Dudley Barlow
George Michael Dadd
Original Assignee
Nick Dudley Barlow
George Michael Dadd
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

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Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F03MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING WEIGHT AND MISCELLANEOUS MOTORS; PRODUCING MECHANICAL POWER; OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
    • F03BMACHINES OR ENGINES FOR LIQUIDS
    • F03B3/00Machines or engines of reaction type; Parts or details peculiar thereto
    • F03B3/12Blades; Blade-carrying rotors
    • F03B3/121Blades, their form or construction
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F03MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING WEIGHT AND MISCELLANEOUS MOTORS; PRODUCING MECHANICAL POWER; OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
    • F03BMACHINES OR ENGINES FOR LIQUIDS
    • F03B17/00Other machines or engines
    • F03B17/06Other machines or engines using liquid flow with predominantly kinetic energy conversion, e.g. of swinging-flap type, "run-of-river", "ultra-low head"
    • F03B17/062Other machines or engines using liquid flow with predominantly kinetic energy conversion, e.g. of swinging-flap type, "run-of-river", "ultra-low head" with rotation axis substantially at right angle to flow direction
    • F03B17/063Other machines or engines using liquid flow with predominantly kinetic energy conversion, e.g. of swinging-flap type, "run-of-river", "ultra-low head" with rotation axis substantially at right angle to flow direction the flow engaging parts having no movement relative to the rotor during its rotation
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F03MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING WEIGHT AND MISCELLANEOUS MOTORS; PRODUCING MECHANICAL POWER; OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
    • F03BMACHINES OR ENGINES FOR LIQUIDS
    • F03B3/00Machines or engines of reaction type; Parts or details peculiar thereto
    • F03B3/12Blades; Blade-carrying rotors
    • F03B3/126Rotors for essentially axial flow, e.g. for propeller turbines
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05BINDEXING SCHEME RELATING TO MACHINES OR ENGINES OTHER THAN NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, TO WIND MOTORS, TO NON-POSITIVE DISPLACEMENT PUMPS, AND TO GENERATING COMBUSTION PRODUCTS OF HIGH PRESSURE OR HIGH VELOCITY
    • F05B2230/00Manufacture
    • F05B2230/90Coating; Surface treatment
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05BINDEXING SCHEME RELATING TO MACHINES OR ENGINES OTHER THAN NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, TO WIND MOTORS, TO NON-POSITIVE DISPLACEMENT PUMPS, AND TO GENERATING COMBUSTION PRODUCTS OF HIGH PRESSURE OR HIGH VELOCITY
    • F05B2240/00Components
    • F05B2240/90Mounting on supporting structures or systems
    • F05B2240/97Mounting on supporting structures or systems on a submerged structure
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05BINDEXING SCHEME RELATING TO MACHINES OR ENGINES OTHER THAN NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, TO WIND MOTORS, TO NON-POSITIVE DISPLACEMENT PUMPS, AND TO GENERATING COMBUSTION PRODUCTS OF HIGH PRESSURE OR HIGH VELOCITY
    • F05B2280/00Materials; Properties thereof
    • F05B2280/40Organic materials
    • F05B2280/4002Cellulosic materials, e.g. wood
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00Energy generation through renewable energy sources
    • Y02E10/20Hydro energy
    • Y02E10/22Conventional, e.g. with dams, turbines and waterwheels
    • Y02E10/223Turbines or waterwheels, e.g. details of the rotor
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00Energy generation through renewable energy sources
    • Y02E10/20Hydro energy
    • Y02E10/28Tidal stream or damless hydropower, e.g. sea flood and ebb, river, stream
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02PCLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P70/00Climate change mitigation technologies in the production process for final industrial or consumer products
    • Y02P70/50Manufacturing or production processes characterised by the final manufactured product
    • Y02P70/52Manufacturing of products or systems for producing renewable energy
    • Y02P70/525Hydropower turbines
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02PCLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P70/00Climate change mitigation technologies in the production process for final industrial or consumer products
    • Y02P70/50Manufacturing or production processes characterised by the final manufactured product
    • Y02P70/52Manufacturing of products or systems for producing renewable energy
    • Y02P70/525Hydropower turbines
    • Y02P70/527Hydropower turbines for tidal streams or dam-less hydropower, e.g. sea flood and ebb or stream current

Abstract

An underwater turbine blade formed of a solid core 2, for example made of wood, encased within a waterproof layer 1, such as resin impregnated fibreglass or carbon fibre so as to prevent water ingress into the core and to provide resistance to impact damage. The core may be formed of sheets 4 or strips 5 of solid material separated by partitions of a waterproof material, and spacers may be used to hold the wood apart when the laminate is formed.

Description

LJ(1t?I'%R1tE' Turbine Blade This invention relates to a method and means of building an underwater turbine blade using a The use of wood and other similar solid materials in underwater applications can lead to a number of difficulties. The strength of wood may not be sufficient for highly loaded turbine blades.

Furthermore, water ingression, which may be caused by damage due to collision for example, can lead to a further degradation of strength. Pressure differentials in tidal applications can by high so a solid blade construction according to the present invention enables the blade to operate deep underwater without crushing or damaging the blade.

To overcome these problems the present invention proposes a blade made from a solid material such as an engineered wooden laminate, for example which is shielded from the water by means of a waterproof barrier. The waterproof barrier on the surface of the wood is configured to add strength to the said wooden core since it is made from a material that is stiffer and stronger than the solid core. Additional waterproof barriers from the same or different material can be used to compartmentalise the solid core so that water ingression due to damage or leaks is limited to a localised region, and additional strength is also added. The prevention of further damage water ingress in this way allows the blade to maintain high strength, despite damage since the damage is confined and prevented from spreading beyond the local damaged region.

The core is fabricated in a way that lends its self to an automatic process whereby layers of wood and carbon fibres (or equivalent suitable materials) are assembled dry. The waterproof resin matrix is pulled through the assembly of wood and carbon fibre by means of infusion, whereby a vacuum is used to pull the resin through the assembly. The resin subsequently cures to form a solid material which is partitioned by layers of the waterproof strong material, such as carbon fibre. The waterproof compartmentalisation can be chosen to suit the purpose, such as to ensure high strength/stiffness where required, or to ensure a high degree of damage tolerance in vulnerable regions. The individual compartments comprising solid material surrounded by a carbon fibre shell may be any shape, such as sheets of wood separated by sheets of waterproof strong material, or rectangular, hexagonal or cuboidal strips of wood surrounded by the waterproof or strong material or any other suitable shape for the purpose.

The water proof external barrier is preferably made from fibreglass or carbon laminate, plastic or another suitable material and encases the said wooden core on all parts that are exposed to the water. The engineered wooden laminate is preferably comprised of sheets or strips of wood which are attached together with a suitable waterproof bonding adhesive, such as a polymerised bonding resin or the like.

The invention will now be described solely by way of example and with reference to the accompanying figures in which Figure 1 shows an underwater turbine comprised of solid wood or an engineered wooden laminate region and a waterproof outer layer.

Figure 2 shows the preferred construction of the wooden skin for compartmentalisation.

Figure 3 shows another alternative embodiment of the wooden laminate core, in which the wooden laminate core is formed of strips instead of sheets In Figure 1, the said waterproof external barrier, 1, surrounds the said wooden laminate core, 2. The water proof barrier is preferably fibreglass or carbonfiber and adds stiffness and strength to the underwater turbine blade. The waterproof external barrier, 1, may also include a material suitable for reducing damage due to impact such as Kevlar.

In Figure 2, the said engineered wooden laminate core, 2, is shown in its preferred embodiment. It comprises a single or several laminas made of wood, 4, with a single, or several strong and waterproof layers made of fibreglass or carbon fibre or another suitable material, 3, such that it provides the waterproof compartmentation that protects the blade from excessive water ingress and such that it provides additional strength. These waterproof layers, may be configured to be in the horizontal plane, but they may also be in a vertical plane.

In Figure 3, the said laminas of wood, 4, are formed using strips, 5, of wood or a strong solid material instead of sheets. This makes it possible to draw the matrix bonding adhesive such as epoxy resin into the laminate by means of a vacuum process, since a pathway for the resin to flow through is provided by the gaps between the wooden strips, 5. Each individual strip, 5, may be surrounded by a sheet of carbon fibre rolled around it for strength and compartmentation. Each strip could be either made from wood, or from pre-formed carbon strips, or from a combination of both.

Claims (4)

  1. Claims 1. An underwater turbine blade comprised of a wooden body or another solid material encased within a waterproof layer to protect the solid material from water ingress and damage due to water saturation and to provide resistance to impact damage and loads acting on the turbine whereby the said waterproof layer is preferably made from resin impregnated fibreglass or carbon fibre or a similar suitable waterproof material.
  2. 2. An underwater turbine blade according to claim 1 in which the said solid material is made up from pieces of wood together with partitions of waterproof material such that the ingress of water into the turbine blade is reduced or restricted, whereby the waterproof layer is made from fibreglass or carbon fibre or a suitable waterproof material and is stronger than the solid material such that it additionally adds strength and stiffness.
  3. 3. An underwater turbine blade according to claim 2 in which the waterproof material is preferably resin or suitable adhesive material and its thickness is controlled by the use of a spacer to hold the wood apart when the laminate is formed.
  4. 4. An underwater turbine blade according to claim 2 in which the layers of wood are formed by strips of wood rather than sheets such that a pathway for resin flow is formed between them to facilitate resin infusion, and such that the nature of compartmentalisation is altered where in the compartmentalisation can be of any shape such as cuboidal, square strips, or hexagonal strips for example.
GB201116255A 2011-05-27 2011-09-20 Underwater turbine blade Withdrawn GB201116255D0 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB201108922A GB201108922D0 (en) 2011-05-27 2011-05-27 Underwater turbine blade

Publications (2)

Publication Number Publication Date
GB201116255D0 GB201116255D0 (en) 2011-11-02
GB2491213A true true GB2491213A (en) 2012-11-28

Family

ID=44310485

Family Applications (2)

Application Number Title Priority Date Filing Date
GB201108922A Ceased GB201108922D0 (en) 2011-05-27 2011-05-27 Underwater turbine blade
GB201116255A Withdrawn GB201116255D0 (en) 2011-05-27 2011-09-20 Underwater turbine blade

Family Applications Before (1)

Application Number Title Priority Date Filing Date
GB201108922A Ceased GB201108922D0 (en) 2011-05-27 2011-05-27 Underwater turbine blade

Country Status (1)

Country Link
GB (2) GB201108922D0 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2749764A1 (en) * 2012-12-27 2014-07-02 Siemens Aktiengesellschaft Turbine blade, manufacturing of the turbine blade and use of the turbine blade
DE102013217180A1 (en) * 2013-08-28 2015-03-05 Voith Patent Gmbh Current power plant

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4465537A (en) * 1982-05-19 1984-08-14 North Wind Power Company, Inc. Method of making a wooden wind turbine blade
GB2265672A (en) * 1992-03-18 1993-10-06 Advanced Wind Turbines Inc Wind turbine blade
WO2003008800A1 (en) * 2001-07-19 2003-01-30 Neg Micon A/S Wind turbine blade
WO2006002621A1 (en) * 2004-06-30 2006-01-12 Vestas Wind Systems A/S Wind turbine blades made of two separate sections, and method of assembly
US20070251090A1 (en) * 2006-04-28 2007-11-01 General Electric Company Methods and apparatus for fabricating blades
WO2011026009A1 (en) * 2009-08-28 2011-03-03 Polystrand, Inc Thermoplastic rotor blade
WO2011092474A2 (en) * 2010-01-29 2011-08-04 Blade Dynamics Limited A blade for a turbine operating in water

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4465537A (en) * 1982-05-19 1984-08-14 North Wind Power Company, Inc. Method of making a wooden wind turbine blade
GB2265672A (en) * 1992-03-18 1993-10-06 Advanced Wind Turbines Inc Wind turbine blade
WO2003008800A1 (en) * 2001-07-19 2003-01-30 Neg Micon A/S Wind turbine blade
WO2006002621A1 (en) * 2004-06-30 2006-01-12 Vestas Wind Systems A/S Wind turbine blades made of two separate sections, and method of assembly
US20070251090A1 (en) * 2006-04-28 2007-11-01 General Electric Company Methods and apparatus for fabricating blades
WO2011026009A1 (en) * 2009-08-28 2011-03-03 Polystrand, Inc Thermoplastic rotor blade
WO2011092474A2 (en) * 2010-01-29 2011-08-04 Blade Dynamics Limited A blade for a turbine operating in water

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2749764A1 (en) * 2012-12-27 2014-07-02 Siemens Aktiengesellschaft Turbine blade, manufacturing of the turbine blade and use of the turbine blade
DE102013217180A1 (en) * 2013-08-28 2015-03-05 Voith Patent Gmbh Current power plant

Also Published As

Publication number Publication date Type
GB201116255D0 (en) 2011-11-02 grant
GB201108922D0 (en) 2011-07-13 grant

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WAP Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1)