GB2493003A - Deflector for marine current turbine - Google Patents

Deflector for marine current turbine Download PDF

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Publication number
GB2493003A
GB2493003A GB1112498.9A GB201112498A GB2493003A GB 2493003 A GB2493003 A GB 2493003A GB 201112498 A GB201112498 A GB 201112498A GB 2493003 A GB2493003 A GB 2493003A
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United Kingdom
Prior art keywords
deflector
turbine
water
marine
flow
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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.)
Granted
Application number
GB1112498.9A
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GB2493003B (en
GB201112498D0 (en
Inventor
Richard L Donaghey
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Priority to GB1112498.9A priority Critical patent/GB2493003B/en
Publication of GB201112498D0 publication Critical patent/GB201112498D0/en
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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
    • F03B—MACHINES OR ENGINES FOR LIQUIDS
    • F03B17/00—Other machines or engines
    • F03B17/06—Other machines or engines using liquid flow with predominantly kinetic energy conversion, e.g. of swinging-flap type, "run-of-river", "ultra-low head"
    • 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
    • F03B—MACHINES OR ENGINES FOR LIQUIDS
    • F03B13/00—Adaptations of machines or engines for special use; Combinations of machines or engines with driving or driven apparatus; Power stations or aggregates
    • F03B13/12—Adaptations of machines or engines for special use; Combinations of machines or engines with driving or driven apparatus; Power stations or aggregates characterised by using wave or tide energy
    • F03B13/26—Adaptations of machines or engines for special use; Combinations of machines or engines with driving or driven apparatus; Power stations or aggregates characterised by using wave or tide energy using tide energy
    • F03B13/264—Adaptations of machines or engines for special use; Combinations of machines or engines with driving or driven apparatus; Power stations or aggregates characterised by using wave or tide energy using tide energy using the horizontal flow of water resulting from tide movement
    • 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
    • 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
    • Y02E10/30—Energy from the sea, e.g. using wave energy or salinity gradient

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Oceanography (AREA)
  • Power Engineering (AREA)
  • Other Liquid Machine Or Engine Such As Wave Power Use (AREA)

Abstract

A vertical wall barrier is sited adjacent to the blades of a marine turbine. The deflector is flat and diverts water to the turbine to increase speed and volume of water through the turbine in both opposing directions of tidal flow. The deflector is positioned in line with the turbine blades and at approximately right angles to the blade axles. The deflector can be built onto the sea bed in shallow water or floating and anchored to the sea bed in deep water. It is best used in coastal areas with quick flowing tides, eg. around headlands, in estuaries and in deep sea ocean currents. The deflector may be positioned vertically in line with the turbine and have a height equal to at least the turbine diameter. The width is preferably at least four times the turbine diameter.

Description

DESCRIPTION
Background.
Much research work has been done on design and use of marine turbines, turbines generating electricity and being driven by tidal flow. To be cost effective turbines require fast flowing tides or currents. The thinking to date is to use marine turbines only in restricted places with very fast flowing currents such as The Bay of Funday in Canada and in a few estuaries with narrows and at a limited number of coastal headlands with fast flowing tides.
Wind energy is being utilised because not enough power generation is planned from tidal generation.
Wind power is irregular and unpredictable.
Tidal currents are powerfull and are fully predictable.
Times of high and low tide vary around all coastlines, ensuring that some tidal movement occurs at all times, i.e. 24 hours per thy and 365 days per annum.
The deflector has been conceived and designed to gather much tidal or current flow and direct it through the blades of marine turbines, considerably increasing the output of every turbine and allowing multiple turbines to be sited in most areas of tidal flow, where otherwise many sites would not be economically viable due to the moderate speed of water flow.
The DEFLECTOR has been designed to direct water and speed the flow and volume of water through blades of marine turbines which generate electricity using tidal flow or ocean current.
By increasing speed of water flow through turbine blades the deflector will increase the generation output of marine turbines by between 40% and 400%?, dependant on size and location of deflector, making the turbines more efficient and enabling siting of turbines in areas with moderate water flow speed to be economically viable.
The Deflector is intended to be used in coastal areas with fast flowing tides, particularly around headilands.
Tidal flows are powerful, regular and predictable. Times of high and low tides vary around all coasts. Siting of turbines around Britain, for example, will provide electricity from natural resources 24 hours per day as a majority of turbines will be experiencing some tidal movement from ebb or flow The Deflector to be used in estuaries where multiple turbines can utilise much of the tidal flow area obviating the need for a bather which would block the passage of shipping, of fish and marine mammals and affect wildlife.
The Deflector can be used in deep sea, as a floating barrier, to generate power from ocean currents.
The design of the Deflector means that it will equally increase the speed of flow through turbine blades in both opposing directions of tidal or current flow.
Drawings show the deflector shape and position relative to a turbine and blades.
The Deflector is formed as a vertical wall, sited beside and in-line with the blades of a marine turbine and at approximately right angles to the blade axles.
See drawings__j&_2_ The deflector wall should be facing the current or tidal flow to meet it in both directions of ebb and flow, i.e. between 75 and 90 degrees to the current flow in both opposing directions of flow and so direct the increased flow of water around the end(s) of the wall and through the turbine blades.
See drawing Z The wall of the deflector should be in line with the blades of the turbine i.e. between 90% and 120% to the axis of the axis of the blades, and so direct the flow of water through the turbine blades, see drawing The Deflector is formed as a fiat wall to be sited beside the blades of a marine turbine(s).
The deflector faces the tidal current in both ebb and flow directions of tide.
The deflector acts as a barrier to tidal water flow adjacent to the turbine blades, directing an increased volume of water to the turbine blades.
The Deflector creates an area of low water pressure behind the deflector, i.e. the opposite side to the current flow when the deflector is situated in water flow caused by tidal movement.
The flow of water around the end of the deflector increases speed due to the increase in distance to travel to flow into the area of low pressure.
(Gravitational pull will draw water into the potential void behind the deflector) The deflector can be sited against and adjoining a coastal headland to increase the headland effect and increase speed of water flow.
The deflector can be sited against and adjoining.any coastal area to create a headland effect, increasing speed of tidal flow.
When multiple turbines are sited in line or within a grid pattern, one or mote deflectors can be sited in line with the first turbine and one or more in line with the last turbine to direct and speed the flow of water in both directions of tidal or current flow. See drawing 4 When deflectors are sited in coastal areas they can, depending or tidal flow pattern, be sited opposite a headland to cause a narrow passage and concentrate water through the passage where the water will flow fastest.
The dimensions of the deflector wall to be; Height to be a minimum of the diameter of the turbine blades and vertically in line with the blades Width to be a minimum of four times that of the blades diameter.
Increase in length of deflector will proportionately increase volume and speed of water flow through turbine.
The deflector can form a pier attached to a coastline.
See drawing j The Deflector can be built onto the sea bed in coastal areas with shallow water or can be floating but anchored to the sea bed to ensure that its position is maintained in deep water.
Multiple deflectors and turbines could be anchored and floating or fixed on to the sea bed in estuaries.
In deep sea ocean currents they can be anchored and floating or be anchored and partially submerged.
The deflector can be used in addition to a turbine mounted within a venturi easing? The deflector will gather and direct water through the casing, creating increased volume and speed of water to the venturi, therefore increasing the venturi effect by between 40% and 200% dependant on size of deflector.
See drawing When the deflector is used in addition to a venturi type turbine casing a barrier must be sited at both ends of the casing, i.e. to direct water flow of both tidal directions. The barrier at the entrance to the casing will deflect water to the turbine and increase speed of flow.
The barrier at the exit end of the turbine casing wilt further increase exit speed of flow by causing an area of low pressure! partial vacuum beyond the exit of the turbine.
See drawing

Claims (5)

  1. <claim-text>CLAIMS1. Reason, to be used to increase velocity of water in tidal flow or ocean current.</claim-text> <claim-text>2. To improve efficiency of marine turbines to produce electricity from tidal flow or currents.</claim-text> <claim-text>3. To be used at or around coastal headlands where tidal flow is fastest.</claim-text> <claim-text>4. To be used in estuaries 5. Expand possible use of marine turbines by increasing number of potential sites which otherwise would not be economically viable.6. Can be fixed to seabed with foundation or floating and tethered to foundation in seabed to maintain position and direction.7. Effective in both opposing directions of tidal flow.8. Negates need for full barrier across estuaries 9. Creates increased turbine power in estuaries without bather 10. More power increase than venturi of similar constructed size.11. Can increase velocity of water flow by between 40% and 200% dependant on size of barrier and current speed.12. Place in line with turbines 13. Multiple sites along coastal giving 24 hour production 14. Positioning at fast flowing tidal headlands can be attached to shore or apart giving narrow, expand.15. Deflector can be used in conjunction with a Venturi casing on a marine turbine. The Deflector will increase volume and speed of water flow directed to a venturi, therefore complementing the venturi and increasing the venturi effect on water flow.MARINE CURRENT DEFLECTORCLAIMSThe Deflector is a flat or curved barrier which would be sited adjacent to the blades of a marine turbine and is designed to deflect moving water( tidal flow or current) towards and through the turbine blades.See drawing 2 Marine turbines used to generate electricity when driven by tidal flow or ocean current are effective in fast flowing water, limiting their use to a moderate number of sites. The deflector will increase volume and speed of water through the turbine blades, thereby increasing the potential use and potential sites for marine turbines.Deflection of water adjacent to a marine turbine will direct an increased volume of water towards the turbine blades.In a tidal current the deflector will create an area of low water pressure behind the deflector, i.e. the side away from the current Due to gravitational pull, water speed will increase around the edge of the deflector as water fills the area of low pressure behind the deflector.The water deflection will increase the volume and speed of water through the turbine, therefore increasing the turbine output.By increasing the output from marine turbines the Deflector will increase the commercial viability of many sites where otherwise the current speed would be insufficient to drive a turbine fast enough for it to be economically viable.The deflector isa wall which has a height equal to or larger than the height or diameter of the turbine blades and a width of preferably four times the width or diameter of the turbine blades.The deflector will be effective from a width of equal to the blades but effectiveness will increase proportional to increase in width.See drawing 1.The deflector is to be positioned beside and in preferably in line with the blades of a marine turbine.The deflector is to be positioned at a maximum of 90 degrees or less to a current so as to be facing the flow of a current or tidal flow, to direct water flow to and through the turbine blades.The deflector can be build onto the sea or river bed or can be floating and anchored to the sea bed to maintain its position.The deflector will work in both opposing directions of tidal flow or current.The deflector can be used at coastal headlands with quick moving tidal flow, in deep sea ocean currents and in river estuaries or sea channels with fast flowing current.The deflector can also be positioned attached to a headland to create a more acute point to give an increase in water flow.See drawing The deflector can also be positioned opposite to a headland, creating a gap through through which water flow can be concentrated.Two deflectors can be positioned, one either side of one or more turbine blades, one attached to shore and one opposite to create a concentration of water through the gap.The deflector can increase velocity of water flow by between 40% and 200% dependant on size of deflector.The use of multiple deflectors negates the need for a barrier in estuaries.The Deflector is to be used in tidal coastal areas, in estuaries and in deep sea ocean currents.AMENDMENTS To CLAIMS HAVE BEEN FILED AS FOLLOWS Claims 1. A deflector for directing a flow of water through the blades of a marine turbine, said deflector comprising a flat or cutved bather or wall arranged, in use, beside a marine turbine facing a current flow whereby the deflector acts as a bather to said current flow adjacent the marine turbine, thereby directing said current flow towards and through the marine turbine.
  2. 2. A deflector as claimed in claim 1, wherein the deflector is arranged at an angle of between 750 and 900 the current flow to direct said current flow around an end of the 1Q deflector sd throughthe djacent marine, turbine,
  3. 3. A deflector as claimed in any preceding claim, wherein the height of said wall or barrier is at least equal to the height. or diameter of the blades of the adjacent marine turbine.
  4. 4. A deflector as claimed in any preceding claim, wherein the width of said wail or barrier is approximately four times the diameter of the blades of the adjacent marine turbine 5. A deflector as claimed in any preceding claim, wherein the deflector is arranged approximately at right angles to the rotational axis of the. dj.cent marine turbine.6. A deflector as claimed in any preceding claim, wherein said wall or barrier is mounted on the sea bed adjacent said marine turbine.U7. A deflector as claimed in any of claims I to 5, wherein the deflector comprises a floating *...fl * 25 or buoyant bather, preferably anchored to the sea. bed. -* 4 * ** 8. A deflector as claimed in any preceding claim comprising two or more walls or bather mounted in line on either side of an adjacent marine turbine, such that the marine turbine is * 4.mounted in a gap between adjacent ends of said walls or bathers.9. A deflector as claimed in any preceding claim, wherein said wall.01 bather is arranged substantially vertically adjacent and inline with the blades of an adjacent marine turbine.10. An array of deflectors, each deflector being in accordance with any of claims I to 9, said detlectors being arranged in line and/or in a grid pattern, wherein gaps are defined between adjacent deflectors within which may be mounted respective marine turbines such that the direct current flow though said marine turbines, 1 1 A deflector for directing a flow of water through the blades of a marine turbine substantially as herein dcscribed with reference to the accompanying drawings.S * . * * *5SS..... * S a. * .
  5. 5.S *5S* S. * * *5 0</claim-text>
GB1112498.9A 2011-07-20 2011-07-20 Marine current deflector Active GB2493003B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1112498.9A GB2493003B (en) 2011-07-20 2011-07-20 Marine current deflector

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Application Number Priority Date Filing Date Title
GB1112498.9A GB2493003B (en) 2011-07-20 2011-07-20 Marine current deflector

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GB201112498D0 GB201112498D0 (en) 2011-08-31
GB2493003A true GB2493003A (en) 2013-01-23
GB2493003B GB2493003B (en) 2013-11-27

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2515723A (en) * 2013-03-28 2015-01-07 Vincent Mccormack An Electrical Power Generation Water Turbine Assembly
GB2550834B (en) * 2016-03-10 2021-05-26 Lawrence Donaghey Richard Turbine deflector

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2235252A (en) * 1990-02-01 1991-02-27 Geoffrey Edward Lewis Electrical power generation using tidal power
FR2660701A1 (en) * 1990-04-04 1991-10-11 Carre Francois Hydroelectric unit with screw (propeller) of horizontal axis for production in the stream of water
WO1998001670A1 (en) * 1996-07-05 1998-01-15 Cornelis Hendrik Hulsbergen Tidal current energy converter
GB2408778A (en) * 2003-12-04 2005-06-08 Calum Mackinnon Current stream energy device
FR2923555A1 (en) * 2007-11-09 2009-05-15 Antoine Liminana Energy producing device for use on system in e.g. building, has energy producing module placed at interior of channel to receive concentrated fluid, where fluid is evacuated by fluid exhaust zone
US20090226296A1 (en) * 2007-09-12 2009-09-10 Bibeau Eric L Efficiency enhancement and protection method for ocean, river and channel kinetic hydro turbines

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2235252A (en) * 1990-02-01 1991-02-27 Geoffrey Edward Lewis Electrical power generation using tidal power
FR2660701A1 (en) * 1990-04-04 1991-10-11 Carre Francois Hydroelectric unit with screw (propeller) of horizontal axis for production in the stream of water
WO1998001670A1 (en) * 1996-07-05 1998-01-15 Cornelis Hendrik Hulsbergen Tidal current energy converter
GB2408778A (en) * 2003-12-04 2005-06-08 Calum Mackinnon Current stream energy device
US20090226296A1 (en) * 2007-09-12 2009-09-10 Bibeau Eric L Efficiency enhancement and protection method for ocean, river and channel kinetic hydro turbines
FR2923555A1 (en) * 2007-11-09 2009-05-15 Antoine Liminana Energy producing device for use on system in e.g. building, has energy producing module placed at interior of channel to receive concentrated fluid, where fluid is evacuated by fluid exhaust zone

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2515723A (en) * 2013-03-28 2015-01-07 Vincent Mccormack An Electrical Power Generation Water Turbine Assembly
AU2014242967B2 (en) * 2013-03-28 2018-08-02 Vincent Mccormack A power generating water turbine assembly
US10876515B2 (en) 2013-03-28 2020-12-29 Mccormack Vincent Power generating water turbine assembly
GB2550834B (en) * 2016-03-10 2021-05-26 Lawrence Donaghey Richard Turbine deflector

Also Published As

Publication number Publication date
GB2493003B (en) 2013-11-27
GB201112498D0 (en) 2011-08-31

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Free format text: APPLICATION FILED; APPLICATION TO AMEND SPECIFICATION UNDER SECTION 27 FILED ON 08 APRIL 2015

S27 Amendment of specification after grant (sect. 27/patents act 1977)

Free format text: APPLICATION WITHDRAWN; APPLICATION TO AMEND SPECIFICATION UNDER SECTION 27 FILED ON 08 APRIL 2015 WITHDRAWN ON 14 AUGUST 2015