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NZ744544B2 - Marine power generation system - Google Patents

Marine power generation system Download PDF

Info

Publication number
NZ744544B2
NZ744544B2 NZ744544A NZ74454417A NZ744544B2 NZ 744544 B2 NZ744544 B2 NZ 744544B2 NZ 744544 A NZ744544 A NZ 744544A NZ 74454417 A NZ74454417 A NZ 74454417A NZ 744544 B2 NZ744544 B2 NZ 744544B2
Authority
NZ
New Zealand
Prior art keywords
turbine
assembly according
turbine system
support structure
water flow
Prior art date
Application number
NZ744544A
Other versions
NZ744544A (en
Inventor
Christopher Burden
Jason Hayman
Andrew Hunt
Kevin Urquhart
Original Assignee
Sustainable Marine Energy Limited
Filing date
Publication date
Priority claimed from GBGB1601162.9A external-priority patent/GB201601162D0/en
Priority claimed from GBGB1601163.7A external-priority patent/GB201601163D0/en
Application filed by Sustainable Marine Energy Limited filed Critical Sustainable Marine Energy Limited
Priority claimed from PCT/GB2017/050152 external-priority patent/WO2017125760A1/en
Publication of NZ744544A publication Critical patent/NZ744544A/en
Publication of NZ744544B2 publication Critical patent/NZ744544B2/en

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING 
    • B63B35/00—Vessels or similar floating structures specially adapted for specific purposes and not otherwise provided for
    • B63B35/44—Floating buildings, stores, drilling platforms, or workshops, e.g. carrying water-oil separating devices
    • B63B2035/4433—Floating structures carrying electric power plants
    • B63B2035/4466—Floating structures carrying electric power plants for converting water energy into electric energy, e.g. from tidal flows, waves or currents
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING 
    • B63B35/00—Vessels or similar floating structures specially adapted for specific purposes and not otherwise provided for
    • B63B35/44—Floating buildings, stores, drilling platforms, or workshops, e.g. carrying water-oil separating devices
    • 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
    • F03B13/10—Submerged units incorporating electric generators or motors
    • F03B13/105—Bulb groups
    • 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
    • F05B2240/90—Mounting on supporting structures or systems
    • F05B2240/91—Mounting on supporting structures or systems on a stationary 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
    • F05B2240/00—Components
    • F05B2240/90—Mounting on supporting structures or systems
    • F05B2240/97—Mounting on supporting structures or systems on a submerged structure
    • 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
    • Y02E10/20—Hydro energy
    • 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

turbine assembly, that is positively buoyant in water, and anchored to a water bed, so that the assembly is held in a state of floating equilibrium. The turbine assembly 200 has a support structure 226 and a turbine system comprising first and second turbines, supported by the support structure, and connected by a beam 224 where the first turbine is mounted on one surface of the beam, and the second turbine is mounted on a second, opposing surface of the beam 224. The first turbine system is rotatable about a horizontal axis, relative to the support structure in a direction parallel to the operational axis of the turbine. Both turbines are a flowing-water driveable turbine for generating power from water flow. The turbines have an operational axis and are designed for optimum power output when local water flow is aligned with the operational axis. The turbines have a parallel operational axis. With two turbines operating simultaneously, the overall power generation potential is significantly increased, and by having parallel operational axes, the system can capture energy from currents flowing in either direction without sacrificing efficiency. This is particularly beneficial in bi-directional flows like tidal currents.

Claims (13)

Claims
1. A turbine ly, being positively buoyant in water, and anchored to a water bed, so that the assembly is held in a state of floating equilibrium, the assembly having: a support structure; and 10 a first turbine system, supported by the t structure, the first turbine system being rotatable relative to the support structure; wherein the first turbine system includes a first flowing-water driveable turbine for generating power from water flow, the first turbine having an operational axis, and being designed for optimum power output when local water flow is aligned 15 with the operational axis; and wherein the first turbine system is mounted so as to rotate about a horizontal axis ve to the support structure in response to local water flow so that it brings the operational axis of the first turbine s alignment with the direction of local water flow; 20 wherein the first turbine system includes a second flowing-water driveable turbine for generating power from water flow, the second turbine having an operational axis, and being designed for optimum power output when local water flow is aligned with the ional axis; wherein the operational axes of the first and second turbines are parallel 25 with one r n the first turbine system includes a beam connecting the first turbine and the second turbine; and wherein the first turbine is mounted on one surface of the beam, and the second turbine is d on a second, opposing surface of the beam.
2. The turbine assembly according to claim 1, wherein: the first turbine system has a centre of mass and is lly connected to the support structure so that the first turbine system is rotatable about a centre of 5 rotation; and wherein the centre of rotation is spaced away from the centre of mass of the first turbine system in a direction el to the operational axis of the turbine.
3. The turbine assembly ing to claim 1 or 2, wherein the turbine 10 assembly is submersible.
4. The turbine assembly according to claim 1 or 2, wherein the turbine assembly is configured for operation at the surface of a body of water. 15
5. The turbine assembly according to any preceding claim, wherein the beam comprises a hydrodynamic foil having a drag coefficient which varies with orientation, and n the turbines are mounted on the hydrodynamic foil so that their ional axes are aligned with the orientation in which the drag coefficient of the hydrodynamic foil is at a minimum.
6. The turbine assembly according to any preceding claim, wherein each turbine has a fairing to reduce hydrodynamic drag.
7. The turbine assembly according to any preceding claim, wherein 25 each turbine has a fairing having a drag coefficient which varies with orientation, and is lowest in the orientation which is d with the operational axis of the turbine.
8. The turbine assembly according to any preceding claim, wherein the support structure comprises a platform, and the first turbine system is spaced away from the platform by supports around which the first turbine system can rotate 5 about an axis lly el to the plane of the platform.
9. The turbine assembly according to claim 8, wherein the first turbine system is supported above the platform.
10 10. The turbine assembly according to claim 8 or 9, wherein the first turbine system is arranged to rotate in response to changes of local water flow so that the turbine blades rotate away from the platform.
11. The turbine assembly according to any preceding claim, further 15 comprising an actuator to rotate the first turbine system.
12. The turbine assembly according to any preceding claim, further sing a brake to resist the rotation of the first turbine system. 20
13. The e assembly according to any preceding claim, r comprising a second turbine system, supported by the support structure, the second turbine system having a centre of mass and being pivotally connected to the support ure so that the second e system is ble, relative to the support structure, about a centre of rotation; 25 wherein the second turbine system is of the same design, and is connected to the support structure in the same way, as the first turbine system. 128 110
NZ744544A 2017-01-20 Marine power generation system NZ744544B2 (en)

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
GBGB1601162.9A GB201601162D0 (en) 2016-01-21 2016-01-21 Underwater power generation system
GBGB1601163.7A GB201601163D0 (en) 2016-01-21 2016-01-21 Docking control and actuation system
GB1604380.4A GB2546562B (en) 2016-01-21 2016-03-15 Underwater power generation system
GBGB1604742.5A GB201604742D0 (en) 2016-01-21 2016-03-21 Docking control and actuation system
PCT/GB2017/050152 WO2017125760A1 (en) 2016-01-21 2017-01-20 Marine power generation system

Publications (2)

Publication Number Publication Date
NZ744544A NZ744544A (en) 2024-09-27
NZ744544B2 true NZ744544B2 (en) 2025-01-07

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