GB2441822A - Over-speed control of a semi-buoyant tidal turbine - Google Patents

Over-speed control of a semi-buoyant tidal turbine Download PDF

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Publication number
GB2441822A
GB2441822A GB0617994A GB0617994A GB2441822A GB 2441822 A GB2441822 A GB 2441822A GB 0617994 A GB0617994 A GB 0617994A GB 0617994 A GB0617994 A GB 0617994A GB 2441822 A GB2441822 A GB 2441822A
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GB
United Kingdom
Prior art keywords
turbine
tidal
rotors
frame
semi
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Withdrawn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
GB0617994A
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GB0617994D0 (en
Inventor
Michael Torr Todman
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Individual
Original Assignee
Individual
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Filing date
Publication date
Application filed by Individual filed Critical Individual
Priority to GB0617994A priority Critical patent/GB2441822A/en
Publication of GB0617994D0 publication Critical patent/GB0617994D0/en
Publication of GB2441822A publication Critical patent/GB2441822A/en
Withdrawn legal-status Critical Current

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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
    • 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
    • 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
    • F03B13/14—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 wave energy
    • F03B13/16—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 wave energy using the relative movement between a wave-operated member, i.e. a "wom" and another member, i.e. a reaction member or "rem"
    • F03B13/18—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 wave energy using the relative movement between a wave-operated member, i.e. a "wom" and another member, i.e. a reaction member or "rem" where the other member, i.e. rem is fixed, at least at one point, with respect to the sea bed or shore
    • F03B13/1805—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 wave energy using the relative movement between a wave-operated member, i.e. a "wom" and another member, i.e. a reaction member or "rem" where the other member, i.e. rem is fixed, at least at one point, with respect to the sea bed or shore and the wom is hinged to the rem
    • F03B13/1825—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 wave energy using the relative movement between a wave-operated member, i.e. a "wom" and another member, i.e. a reaction member or "rem" where the other member, i.e. rem is fixed, at least at one point, with respect to the sea bed or shore and the wom is hinged to the rem for 360° rotation
    • F03B13/183—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 wave energy using the relative movement between a wave-operated member, i.e. a "wom" and another member, i.e. a reaction member or "rem" where the other member, i.e. rem is fixed, at least at one point, with respect to the sea bed or shore and the wom is hinged to the rem for 360° rotation of a turbine-like wom
    • 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
    • F03B15/00—Controlling
    • F03B15/02—Controlling by varying liquid flow
    • F03B15/04—Controlling by varying liquid flow of turbines
    • F03B15/06—Regulating, i.e. acting automatically
    • F03B15/18—Regulating, i.e. acting automatically for safety purposes, e.g. preventing overspeed
    • 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"
    • F03B17/061—Other 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 in flow direction
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02B—HYDRAULIC ENGINEERING
    • E02B17/00—Artificial islands mounted on piles or like supports, e.g. platforms on raisable legs or offshore constructions; Construction methods therefor
    • E02B2017/0091—Offshore structures for wind 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
    • F05B2240/90—Mounting on supporting structures or systems
    • F05B2240/97—Mounting on supporting structures or systems on a submerged structure
    • 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
    • F05B2270/00—Control
    • F05B2270/10—Purpose of the control system
    • F05B2270/101—Purpose of the control system to control rotational speed (n)
    • F05B2270/1011—Purpose of the control system to control rotational speed (n) to prevent overspeed
    • 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

Abstract

A semi-buoyant tidal energy turbine system tethered to the seabed by an articulated rigid arm 3. Turbine over-speed control is provided by allowing pressure from the tidal flow 5 to swing the turbine(s) 2 away from a vertical orientation, thus disrupting the flow 5 and reducing energy transfer into the turbine rotors, and thus limiting the potential over-speed. The swinging of the turbine(s) 2 may be assisted by mechanical means such as a rack and pinion, ball-screw, hydraulic ram or adjustable cables and winches. A locking brake may be provided to enable emergency release of the turbine(s) 2, as well as a quick release mechanism for a cable restraint tether system. The rack and pinion, ball-screw, hydraulic ram or adjustable cables and winch system may also be used for trimming the angle of the turbine(s) presented to the tidal flow 5.

Description

2441822
TIDAL TURBINE OVERSPEED PROTECTION
This invention relates to deep water tidal energy turbines, particularly those 5 intended to be located in costal regions or river estuaries at a depth of 20 metres or more and utilising semi-submersible structures.
Many systems have been proposed for the generation of electricity from water turbines. Such turbines harness the stream energy of rivers and tides, and in the 10 case of tides are bi-directional so as to generate electricity both on a rising and a falling tide.
In order to maximise generation of electricity it is of course desirable to site such turbines in regions of deep fast flowing water, but practical difficulties arise when 15 high current velocities are experienced (such as spring tides) or grid connection is lost and the turbines are left suddenly unloaded and thus able to accelerate to a potentially dangerous condition. Existing turbines conventionally utilise variable pitch control on the turbine rotor blades and braking systems on the rotor transmission system. However these devices are often expensive; add considerable 20 weight, increase maintenance requirements, and increase possibility of component failures. The incorporation of stall regulated rotors eliminates much cost and are simpler but cannot without additional control surfaces prevent overspeed and possible damage in certain extreme tidal or fault conditions. It is required to fit this type of system with both a primary large brake system and an additional back-up 25 brake system in case of primary system failure. This invention provides a simple and cost effective method of primary control without recourse to braking or variable pitch control.
According to a first aspect of the invention there is provided an underwater turbine 30 mounting comprising:
a frame adapted to mount one or more horizontal axis water turbines thereon;
a rigid arm connected by hinge joint at one end in said frame, the other end being adapted for pivotal connection to an underwater anchorage;
variable buoyancy means on said frame and adapted to pivot said frame about said arm in use;
a depending moment arm of said frame;
a strut or cable connection between a point on the said rigid arm and said frame; and means to vary the length of said strut or cable to vary the orientation of said frame to that of the tidal flow while in use.
In a preferred embodiment, the frame is adapted for mounting a plurality of turbines transversely to the stream direction. Such an arrangement allows a balanced symmetrical assembly. The frame may comprise a cruciform structure in which the transverse (in use) limb(s) comprise turbine mountings, and the upright (in use) limb(s) comprise a moment arm to which the connecting strut is attached. Preferably the rigid arm is connected to the frame in the region of an upper (in use) transverse limb, and most preferably, substantially on the axis thereof.
A strut arm is provided to brace the vertical (in use) limb to the rigid arm. This strut is made adjustable in length by means of such as a rack and pinion or screw jack system such to enable a varying fixed angle between the member and the rigid arm. Alternatively, a flexible tether cable can be used to link the limb to the rigid arm relying on the tidal force to maintain the cable under tension. The cable would also be adjustable in length by means of winch or similar adjuster. Alternatively, other means may be used for varying the orientation between the vertical (in-use) limb and rigid arm.
3
A locking brake on the strut arm is provided enabling emergency release of the frame and turbines. This may be occasioned by the loss of grid connection where the loss of load may cause the rotors to overspeed and become potentially dangerous. This release would allow pressure from the tidal force to swing the 5 system away from vertical, disrupting the flow profile and energy transfer into the rotors, and thus reducing the rotational speed energy. This would prevent prolonged exposure to overspeed and would enable a more cost effective system to be deployed in a safe manner. Alternatively if a cable system is employed, this can similarly be equipped with a quick release mechanism to provide a similar rapid 10 release and transition out of the main flow range.
In a further embodiment of the invention use of the normal means of adjustment which may be by rack and pinion or screw jack can be utilised to enable trimming of the frame to present the rotors perpendicular to the flow over varying tidal 15 heights thus optimising energy transfer.
In another embodiment of the invention use of the normal means of adjustment can be utilised to enable a reduction in energy transfer when high tidal currents such as spring tides were encountered. This can be by adjusting the rotor generator axis 20 away from perpendicular thus disrupting the energy exchange and rotational speed.
Other features of the invention will be apparent from the following description of a preferred embodiment illustrated by way of example only in the accompanying drawings in which:
25 Fig.l is a schematic view of an embodiment of an underwater turbine incorporating the invention;
Fig.2 illustrates deployment of the embodiment of Fig.l.
Fig.3 illustrates the condition when out of line and disrupting flow onto the rotors.
30 Fig.4 shows a cable constrained embodiment of Fig.2
4
Fig.5 shows a cable constrained embodiment of Fig.3
With reference to Fig.l an underwater turbine assembly 100 comprises a cruciform frame having one parallel limb at right angles. In the active in-use condition the 5 limb 1 is substantially upright whereas other two limbs 7 are substantially horizontal and transverse to the direction of the water stream 5. Mounted on respective ends of the limbs 7 are electricity generating turbines 2. The upright limb 1 comprises hollow chambers which can be partially flooded to vary the buoyancy thereof. The horizontal limbs and the rigid tether may also comprise 10 hollow chambers for buoyancy purposes.
Pivotally connected between the turbine frame and an underwater anchorage 4 is a rigid arm 3.
15 A strut 6 is connected between the turbine frame and a point on the rigid arm 3, providing bracing and means of adjustment. One end of this strut may be fixed via a hinge or other compliant joint 9, with the other end connected by a means of adjustment such as a rack and pinion 7 or hydraulic actuator. In another embodiment this can be accomplished by means of an adjustable cable restraint 20 system between the turbine frame and lower end of the rigid arm and/or between the lower end of the rigid arm and the upper section of the upright limb 1. Other means may be deployed to mechanically vary the orientation of upright limb 1 and tether arm 3.
25 In use the frame is deployed as illustrated in a water stream with the top of the upright limb protruding just above the water surface. The pivotal connections of the arm 3 ensure that the turbines self align with the water stream 5. In the event that the water stream reverses, due to tides, the turbine assembly swings through 180° about the anchorage so that electricity is generated for both directions of 30 stream flow, and any stages in between that may be encountered in some locations.
5
In this embodiment of the invention it is arranged such that the orientation of the upright frame 1 in Figure 2 can be varied by adjustment of the strut or cable lengths 5 to change the angle of the turbine rotors 10 to the oncoming tidal flow 5.
Figure 2 shows the frame assembly in a typical operating position with the turbine rotors perpendicular to the water flow thus maximising energy transfer.
10 The means of modulating the length of the strut or tether may for example comprise a rack and pinion, ball screw, hydraulic or electric actuators, or cables and winch, and may be operated remotely from a shore station or elsewhere. Figure 2 indicates a possible rack and pinion system 8. The length of the strut or tether may also be adjusted in use accordingly to stream flow rate and direction in order to optimise 15 generation of electricity for the tidal velocities at the time. This may be in conjunction with the buoyancy control can thus ensure the rotors are maintained perpendicular to the current flow during variations of water depth caused by tidal action, or by deliberately moving the rotors away from perpendicular to reduce efficiency and possible overspeed at certain times.
20
In figure 3 the frame 1 is inclined back at an angle causing the turbine rotors 10 to be out of line with the oncoming tidal flow presenting a highly inefficient approach onto the blading and thus poor transfer of energy. Taken to the extreme with the rotors effectively horizontal, no effective transfer would be made thus preventing 25 overspeed of a stall regulated rotor system.
Figures 4 and 5 show the same sequence but the further embodiment of the invention utilising a cable and winch system to change the respective orientation of frame 1 and rigid arm 3.
6

Claims (1)

  1. Claims:
    1. Semi-buoyant tidal stream turbine tethered to the seabed by an articulated rigid arm in which overspeed control is provided by allowing pressure from the tidal force to swing the system away from vertical, disrupting the flow on to the 5 rotors and reducing energy transfer into the rotors and thus reducing the tendency to overspeed.
    2. Semi-buoyant tidal stream turbine in accordance with claim 1 in which the swinging of the system away from the vertical is assisted by mechanical means
    10 such as a rack and pinion, ballscrew, hydraulic ram or the like when it is desired to move the rotors out of perpendicularity with the flow and hence limit overspeed.
    3. Semi-buoyant tidal stream turbine in accordance with claim 1 in which the 15 swinging of the system away from the vertical is assisted by means of adjustable cables and winches.
    4. Provision of a locking brake on the strut arm between a rigid tether arm and the semi-buoyant frame enabling emergency release of the frame and turbines
    5. The provision of a quick release mechanism for a cable restraint tether system for the semi-buoyant frame
    6. The means of adjustment for a strut system as in claim 4 which may be by rack 25 and pinion or screw jack and that can be utilised to enable trimming of the frame to present the rotors perpendicular to the flow over varying tidal heights thus optimising energy transfer
    7. The means of adjustment for a cable supported system as in claim 5 which may 30 be by winch or other means of cable adjustment and that can be utilised to
    • •
    • • • • •• • •• •
    20
    7
    enable trimming of the frame to present the rotors perpendicular to the flow over varying tidal heights thus optimising energy transfer
    8. The means of utilising the normal means of adjustment as in any of the 5 foregoing claims such that a reduction, in energy transfer can be made when high tidal currents such as spring tides are encountered. This can be by adjusting the rotor generator axis away from perpendicular thus disrupting the energy exchange and rotational, speed
    10 9. Operation or adjustment of turbine orientation to the tidal flow locally by a control system on the turbine or by remote means from such as a shore station or elsewhere
    10. The control of the mechanisms in claims 4 and 5 in conjunction with the 15 buoyancy control of the frame to ensure the rotors are maintained perpendicular to the current flow during variations of water depth caused by tidal action, or by deliberately moving the rotors away from perpendicular to reduce efficiency
    .. and possible overspeed at certain flow conditions
    • •
    • •••
    • •• •
    20
    • •••
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    • •
    • • • •••
GB0617994A 2006-09-13 2006-09-13 Over-speed control of a semi-buoyant tidal turbine Withdrawn GB2441822A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB0617994A GB2441822A (en) 2006-09-13 2006-09-13 Over-speed control of a semi-buoyant tidal turbine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB0617994A GB2441822A (en) 2006-09-13 2006-09-13 Over-speed control of a semi-buoyant tidal turbine

Publications (2)

Publication Number Publication Date
GB0617994D0 GB0617994D0 (en) 2006-10-18
GB2441822A true GB2441822A (en) 2008-03-19

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Family Applications (1)

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Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2009004308A2 (en) * 2007-06-30 2009-01-08 John Richard Carew Armstrong Improvements in water turbines
WO2009130023A2 (en) * 2008-04-25 2009-10-29 Voith Patent Gmbh Modular underwater power station, and method for the assembly thereof
GB2461265A (en) * 2008-06-23 2009-12-30 Tidal Energy Ltd Tidal turbine with limited axial thrust
DE102009011784B3 (en) * 2009-03-09 2010-07-22 Voith Patent Gmbh Method and device for braking an underwater power plant
GB2472499A (en) * 2009-08-03 2011-02-09 Japan System Planning Co Ltd Underwater turbine mounting with buoyant body tethered to top of mounting frame
WO2011042039A1 (en) * 2009-10-05 2011-04-14 Bluewater Energy Services B.V. Floating assembly for generating energy from sea currents
GB2476509A (en) * 2009-12-24 2011-06-29 Rolls Royce Plc Turbine with reduced thrust coefficient at excessive speed
GB2486750A (en) * 2010-12-23 2012-06-27 Tidalstream Ltd Mounting for underwater turbine
WO2013083976A1 (en) * 2011-12-09 2013-06-13 Tidalstream Limited Support for water turbine
US20130313831A1 (en) * 2012-05-23 2013-11-28 Donald H. Gehring Hydroelectricity Generating Unit Capturing Marine Wave Energy and Marine Current Energy
NO341375B1 (en) * 2016-11-03 2017-10-23 Ole Martin Eines Production of energy from ocean waves at anchored hull with vertical shaft turbines, which are stored at the end of legs attached to the bottom of the hull

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4864152A (en) * 1986-12-03 1989-09-05 Pedersen Hans M Floating tidal power station for placing in sea and river currents for gaining energy

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4864152A (en) * 1986-12-03 1989-09-05 Pedersen Hans M Floating tidal power station for placing in sea and river currents for gaining energy

Cited By (27)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2009004308A3 (en) * 2007-06-30 2009-06-25 John Richard Carew Armstrong Improvements in water turbines
WO2009004308A2 (en) * 2007-06-30 2009-01-08 John Richard Carew Armstrong Improvements in water turbines
WO2009130023A3 (en) * 2008-04-25 2010-12-09 Voith Patent Gmbh Modular water turbine, and method for the assembly thereof
WO2009130023A2 (en) * 2008-04-25 2009-10-29 Voith Patent Gmbh Modular underwater power station, and method for the assembly thereof
GB2471807A (en) * 2008-04-25 2011-01-12 Voith Patent Gmbh Modular underwater power station, and method for the assembly thereof
GB2461265A (en) * 2008-06-23 2009-12-30 Tidal Energy Ltd Tidal turbine with limited axial thrust
DE102009011784B3 (en) * 2009-03-09 2010-07-22 Voith Patent Gmbh Method and device for braking an underwater power plant
WO2010102720A1 (en) 2009-03-09 2010-09-16 Voith Patent Gmbh Method and device for decelerating an underwater power station
GB2472499A (en) * 2009-08-03 2011-02-09 Japan System Planning Co Ltd Underwater turbine mounting with buoyant body tethered to top of mounting frame
US8575771B2 (en) 2009-08-03 2013-11-05 Japan System Planning Co., Ltd. Installation structure for hydroelectric power generation apparatus
GB2472499B (en) * 2009-08-03 2015-07-22 Japan System Planning Co; Ltd Installation structure for hydroelectric power generation apparatus
WO2011042039A1 (en) * 2009-10-05 2011-04-14 Bluewater Energy Services B.V. Floating assembly for generating energy from sea currents
US9068550B2 (en) 2009-10-05 2015-06-30 Bluewater Energy Services B.V. Floating assembly for generating energy from sea currents
CN102667139B (en) * 2009-10-05 2016-06-29 蓝水能源服务有限公司 The floatation element of energy is produced from ocean current
AU2009353826B2 (en) * 2009-10-05 2014-11-06 Bluewater Energy Services B.V. Floating assembly for generating energy from sea currents
GB2476509A (en) * 2009-12-24 2011-06-29 Rolls Royce Plc Turbine with reduced thrust coefficient at excessive speed
GB2486750A (en) * 2010-12-23 2012-06-27 Tidalstream Ltd Mounting for underwater turbine
GB2486750B (en) * 2010-12-23 2013-07-10 Tidalstream Ltd Mounting for underwater turbine
WO2013083976A1 (en) * 2011-12-09 2013-06-13 Tidalstream Limited Support for water turbine
JP2015500425A (en) * 2011-12-09 2015-01-05 タイダルストリーム リミテッド Support equipment for water turbines
CN103958885A (en) * 2011-12-09 2014-07-30 潮汐流有限公司 Hydraulic turbine support
JP2016191384A (en) * 2011-12-09 2016-11-10 タイダルストリーム リミテッド Support device for water power turbine
KR101748285B1 (en) * 2011-12-09 2017-06-16 타이들스트림 리미티드 Support for Water Turbine
US8956103B2 (en) * 2012-05-23 2015-02-17 Donald H. Gehring Hydroelectricity generating unit capturing marine wave energy and marine current energy
US20130313831A1 (en) * 2012-05-23 2013-11-28 Donald H. Gehring Hydroelectricity Generating Unit Capturing Marine Wave Energy and Marine Current Energy
NO341375B1 (en) * 2016-11-03 2017-10-23 Ole Martin Eines Production of energy from ocean waves at anchored hull with vertical shaft turbines, which are stored at the end of legs attached to the bottom of the hull
NO20161747A1 (en) * 2016-11-03 2017-10-23 Ole Martin Eines Production of energy from ocean waves at anchored hull with vertical shaft turbines, which are mounted at the end of legs attached to the bottom of the hull

Also Published As

Publication number Publication date
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