WO2006031121A1 - Wave power generating plant - Google Patents

Wave power generating plant Download PDF

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Publication number
WO2006031121A1
WO2006031121A1 PCT/NO2005/000326 NO2005000326W WO2006031121A1 WO 2006031121 A1 WO2006031121 A1 WO 2006031121A1 NO 2005000326 W NO2005000326 W NO 2005000326W WO 2006031121 A1 WO2006031121 A1 WO 2006031121A1
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WO
WIPO (PCT)
Prior art keywords
floating
units
unit
power generating
wave power
Prior art date
Application number
PCT/NO2005/000326
Other languages
French (fr)
Inventor
Robert Storbekk
Original Assignee
Power Vision As
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 Power Vision As filed Critical Power Vision As
Priority to EP05786626.1A priority Critical patent/EP1805413B1/en
Priority to US11/575,133 priority patent/US7629703B2/en
Publication of WO2006031121A1 publication Critical patent/WO2006031121A1/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
    • 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
    • F03B13/1845—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 slides relative to the rem
    • F03B13/1855—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 slides relative to the rem where the connection between wom and conversion system takes tension and compression
    • F03B13/186—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 slides relative to the rem where the connection between wom and conversion system takes tension and compression the connection being of the rack-and-pinion type
    • 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"
    • F03B13/20—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" wherein both members, i.e. wom and rem are movable relative to the sea bed or shore
    • 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
    • F05B2240/40—Use of a multiplicity of similar components
    • 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
    • F05B2240/95—Mounting on supporting structures or systems offshore
    • 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
    • F05B2260/00—Function
    • F05B2260/40—Transmission of power
    • F05B2260/406—Transmission of power through hydraulic systems
    • 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

Definitions

  • the present invention relates to a wave power generating plant comprising an arrangement of interconnected floating units, where each floating unit comprises a floating pontoon, a stabiliser unit and connecting means for the interconnection of the floating units.
  • the power is produced by relative vertical motion of the floating units while each floating unit is locked in the horizontal plane, with the result that the waves move the floating units in a controlled manner in the horizontal plane so that they only move vertically.
  • US 4,742,241 discloses a device for converting wave energy into an exploitable form of energy, and particularly into fluid pressure.
  • the device comprises a common frame structure with a large number of floating devices connected to energy converters.
  • US 4,622,473 discloses an offshore platform with a plurality of floating elements suspended beneath it.
  • the floating elements move vertically upwards as a wave crest passes, and gravity causes the floating elements to move vertically downwards as a wave trough. passes.
  • the vertical motion is utilised to pump a fluid at pressure through a hydraulic system, whereupon the pressure is utilised to generate electric energy which is brought ashore by means of cables.
  • US 3,204,110 discloses a wave power generating plant with two floating bodies that are interconnected by a bolt connection, where there is also provided a curved toothed rack and a cogwheel for transfer of energy to a shaft by means of relative motion between the floating bodies and the bolt connection.
  • US 1,497,205 discloses a wave power generating plant comprising floating bodies that can move vertically in the waves.
  • a post and toothed racks are mounted to the floating body, and the toothed racks drive a shaft mounted on the top of the wave power generating plant.
  • power can be produced by converting a hydraulic pressure generated by waves into electric power in a generator.
  • the disadvantages of the prior art are many, but above all there is the problem that floating bodies moving in the waves are unstable, moving in an unfavourable manner relative to one another so that it is difficult to achieve a good relative motion that can be utilised for creating, for example, a hydraulic pressure.
  • the object of the present invention is to provide a wave power generating plant that avoids the drawbacks mentioned above.
  • a further object is to achieve a relative motion between the various floating units that is suitable for creating a hydraulic pressure while at the same time the connection between the units can be employed for driving a hydraulic pump, preferably concealed in order to shield it from the influence of the waves and the environment.
  • the relative motion should be as stable as possible. Altogether this permits hydraulic fluid to be pumped in several "links" from one element to the next and on to a generator, thus optimising the wave motion. This solution, moreover, will be favourable from the economic point of view as it offers a solution with few generators and many pump units.
  • the present invention has been produced for a wave power generating plant comprising an arrangement of interconnected floating units.
  • the arrangement is anchored to the seabed via mooring buoys, where each floating unit comprises a floating pontoon, a stabiliser unit and connecting means for the interconnection of the floating units.
  • the present invention is characterised in that the connecting means permit a free vertical motion of the floating units relative to one another, while at the same time the connecting means keep the interconnected floating units in a substantially constant relationship to one another in the horizontal plane, whereby the relative vertical motion of the floating units due to wave influence is transferred through an energy transmission device which in turn drives a power-producing unit.
  • the wave power generating plant comprises a hydraulic system comprising a number of pump units for generating pressure in a hydraulic fluid in the hydraulic system, and at least one unit for utilisation of the pressure generated in the hydraulic fluid for production of electric energy.
  • the pump units are driven by the relative vertical motion of the floating units, preferably by the floating units comprising a horizontal toothed rack which by means of relative motion of the floating unit relative to adjacent floating units rotates a cogwheel in the adjacent floating unit, whereupon the cogwheel drives one of the pump units.
  • energy is generated by providing hydraulic cylinders between the floating units, which drive the fluid in the hydraulic system by the relative motion of the floating units.
  • the floating units are locked in the horizontal direction so that they only move vertically, thus enabling this relative motion to be exploited in order to drive a pump for hydraulic fluid which in turn drives a generator for electric power.
  • the fluid may be both liquid and gas.
  • Fig. 1 illustrates the power plant according to the invention located in the water
  • Fig. 2 is an illustration of the power plant viewed from above
  • Fig. 3 is an illustration of the power plant viewed from the side
  • Fig. 4 illustrates the floating unit and components thereof
  • Fig. 5 is a cross section of connecting means for interconnecting several floating units, taken as a section from fig. 4;
  • Fig. 6 illustrates the relative vertical motion of several interconnected floating units in perspective
  • Fig. 7 illustrates an alternative embodiment of the invention, where a hydraulic cylinder is placed between two floating elements, and where the relative motion of the floating elements drives the hydraulic cylinder.
  • the float is integrated in and attached to the framework.
  • a power plant 10 according to the invention is placed in the water.
  • a submarine cable 11 conveys the produced electric energy to land, where power lines 14 transport the energy on to consumers.
  • the power plant in the preferred embodiment consists of an arrangement 20 of floating units 22 (fig. 2).
  • the arrangement 20 consists of an array of ten times seven floating units 22.
  • the arrangement 20 is mounted by means of one or more wires 24 in a mooring buoy 26, which anchors the arrangement 20 to the seabed.
  • a row 27 of floating units comprises generating units 28, this row being illustrated at the top of fig. 2 and marked by black areas. The generating units 28 will be described in detail later.
  • Fig. 3 illustrates how the mooring buoys 26 are anchored to the seabed. It should be noted that the wires 24 are equipped with tension accumulators (not shown) for absorbing tension forces. At the same time the wires 24 are adapted in length so that tidal variations do not influence the arrangement.
  • a floating unit 22 is illustrated in detail in fig. 4.
  • the floating unit 22 comprises a float 40 attached by means of an articulated joint 42 to a cylindrical rod or stabiliser unit 44.
  • a framework 46 To the stabiliser unit 44, above the float 40, is attached a framework 46, .
  • the float 40 is made of an outer layer of glass fibre or the like, and provides buoyancy to the floating unit 22.
  • the float 40 is substantially rounded in shape to enable it to move flexibly over the waves, and the articulated joint 22 also assists in this since the float 40 can pivot both about the longitudinal axis of the articulated joint 42 and about the axis perpendicular thereto, at the attachment of the articulated joint 42 to the stabiliser unit 44.
  • the stabiliser unit 44 is elongated, extending at a depth beneath the surface.
  • the stabiliser unit 44 preferably consists of a steel pipe filled with concrete or the like, and its purpose is to stabilise the floating unit 22 in the water so that it maintains a stable vertical position, while at the same time the stabiliser unit 44 will be able to have a damping effect on the dynamic moment forces that may influence the floating unit 22 due to wave motion.
  • the floating units 22 are interconnected by attachment means 48 in the framework 46.
  • the attachment means 48 are illustrated in detail in sections A and B in fig. 5, taken from fig. 4.
  • the attachment means 48 are mounted at each corner of the framework 46, and comprise a substantially protruding element 50 (section A) adapted to be able to be received in a substantially hollow element 52 (section B). In the embodiment, therefore, each floating element can be attached to four other floating elements.
  • attachment means 48 in fig. 5 are illustrated from above, and that in fig. 4 it can be seen that the attachment means 48 have a longitudinal extension. By this means the protruding element 50 can be moved up and down in the vertical direction relative to the hollow element 52. At the same time it can be seen that the attachment means 48 prevent relative horizontal motion of the floating units 22.
  • the hydraulic system 60 comprises a number of pump units, which can be seen as a number of rectangular boxes in fig. 6. These pump units are driven by a rotating cogwheel that runs along a toothed rack along the corner of the framework 46 in the adjacent floating unit. The pump unit will be driven when there is relative vertical motion of the floating units, and hydraulic fluid will be pumped to the above-mentioned generating units 28.
  • the energy is produced by hydraulic cylinders 80 driving the fluid and thereby driving the units.
  • the generating units 28 utilise the hydraulic pressure to produce electric energy, which is then transferred via the submarine cables 12 to land.
  • the hydraulic fluid at low pressure is then returned to the pump units.
  • the hydraulic system may also include accumulator units for balancing pressure variations.
  • transmission channels in the hydraulic system are preferably provided inside hollow tubes composed of the framework 46, whereby the transmission channels can be shielded from external stresses.
  • the float 40 is integrated in a lower part of the framework.
  • the attachment means may comprise rails with track wheels, etc.

Abstract

A wave power generating plant comprising an arrangement (20) of interconnected floating units (22). The arrangement (20) is anchored to the seabed via mooring buoys (26). Each floating unit comprises a floating pontoon (40), a stabiliser unit (44) and connecting means (48) for the interconnection of the floating units (22). The power is produced by relative vertical motion of the floating units (22), while each floating unit (22) is simultaneously locked in the horizontal plane.

Description

Wave power generating plant
The present invention relates to a wave power generating plant comprising an arrangement of interconnected floating units, where each floating unit comprises a floating pontoon, a stabiliser unit and connecting means for the interconnection of the floating units. The power is produced by relative vertical motion of the floating units while each floating unit is locked in the horizontal plane, with the result that the waves move the floating units in a controlled manner in the horizontal plane so that they only move vertically.
In the patent literature a number of proposals are known for the design of wave power generating plants in order to exploit the energy in the waves to produce electric energy.
US 4,742,241 discloses a device for converting wave energy into an exploitable form of energy, and particularly into fluid pressure. The device comprises a common frame structure with a large number of floating devices connected to energy converters.
US 4,622,473 discloses an offshore platform with a plurality of floating elements suspended beneath it. The floating elements move vertically upwards as a wave crest passes, and gravity causes the floating elements to move vertically downwards as a wave trough. passes. The vertical motion is utilised to pump a fluid at pressure through a hydraulic system, whereupon the pressure is utilised to generate electric energy which is brought ashore by means of cables.
US 3,204,110 discloses a wave power generating plant with two floating bodies that are interconnected by a bolt connection, where there is also provided a curved toothed rack and a cogwheel for transfer of energy to a shaft by means of relative motion between the floating bodies and the bolt connection.
Furthermore, US 1,497,205 discloses a wave power generating plant comprising floating bodies that can move vertically in the waves. In each corner of each floating body, a post and toothed racks are mounted to the floating body, and the toothed racks drive a shaft mounted on the top of the wave power generating plant. In other words, it is generally known that power can be produced by converting a hydraulic pressure generated by waves into electric power in a generator. The disadvantages of the prior art, however, are many, but above all there is the problem that floating bodies moving in the waves are unstable, moving in an unfavourable manner relative to one another so that it is difficult to achieve a good relative motion that can be utilised for creating, for example, a hydraulic pressure.
The object of the present invention is to provide a wave power generating plant that avoids the drawbacks mentioned above. A further object is to achieve a relative motion between the various floating units that is suitable for creating a hydraulic pressure while at the same time the connection between the units can be employed for driving a hydraulic pump, preferably concealed in order to shield it from the influence of the waves and the environment. Furthermore, it is an object that the relative motion should be as stable as possible. Altogether this permits hydraulic fluid to be pumped in several "links" from one element to the next and on to a generator, thus optimising the wave motion. This solution, moreover, will be favourable from the economic point of view as it offers a solution with few generators and many pump units. On the basis of the above-mentioned objects and prior art, therefore, the present invention has been produced for a wave power generating plant comprising an arrangement of interconnected floating units. The arrangement is anchored to the seabed via mooring buoys, where each floating unit comprises a floating pontoon, a stabiliser unit and connecting means for the interconnection of the floating units. The present invention is characterised in that the connecting means permit a free vertical motion of the floating units relative to one another, while at the same time the connecting means keep the interconnected floating units in a substantially constant relationship to one another in the horizontal plane, whereby the relative vertical motion of the floating units due to wave influence is transferred through an energy transmission device which in turn drives a power-producing unit.
This provides a solution where the floating units move in a controlled manner in a relative vertical motion. The pumping motion can be performed between each unit by a suitable transmission and several units can pump to a common generator unit either in series or in parallel. In a preferred embodiment the wave power generating plant comprises a hydraulic system comprising a number of pump units for generating pressure in a hydraulic fluid in the hydraulic system, and at least one unit for utilisation of the pressure generated in the hydraulic fluid for production of electric energy.
It is also preferred that the pump units are driven by the relative vertical motion of the floating units, preferably by the floating units comprising a horizontal toothed rack which by means of relative motion of the floating unit relative to adjacent floating units rotates a cogwheel in the adjacent floating unit, whereupon the cogwheel drives one of the pump units. In an alternative embodiment, energy is generated by providing hydraulic cylinders between the floating units, which drive the fluid in the hydraulic system by the relative motion of the floating units.
It is a significant advantage of the present invention that the floating units are locked in the horizontal direction so that they only move vertically, thus enabling this relative motion to be exploited in order to drive a pump for hydraulic fluid which in turn drives a generator for electric power. In different embodiments the fluid may be both liquid and gas.
The present invention will now be described by means of a preferred embodiment with reference to the attached drawings: Fig. 1 illustrates the power plant according to the invention located in the water; Fig. 2 is an illustration of the power plant viewed from above; Fig. 3 is an illustration of the power plant viewed from the side; Fig. 4 illustrates the floating unit and components thereof;
Fig. 5 is a cross section of connecting means for interconnecting several floating units, taken as a section from fig. 4;
Fig. 6 illustrates the relative vertical motion of several interconnected floating units in perspective, and
Fig. 7 illustrates an alternative embodiment of the invention, where a hydraulic cylinder is placed between two floating elements, and where the relative motion of the floating elements drives the hydraulic cylinder. In fig. 7 the float is integrated in and attached to the framework.
We now refer to fig. 1, where a power plant 10 according to the invention is placed in the water. A submarine cable 11 conveys the produced electric energy to land, where power lines 14 transport the energy on to consumers. The power plant in the preferred embodiment consists of an arrangement 20 of floating units 22 (fig. 2). Here the arrangement 20 consists of an array of ten times seven floating units 22. In each corner the arrangement 20 is mounted by means of one or more wires 24 in a mooring buoy 26, which anchors the arrangement 20 to the seabed. A row 27 of floating units comprises generating units 28, this row being illustrated at the top of fig. 2 and marked by black areas. The generating units 28 will be described in detail later.
Fig. 3 illustrates how the mooring buoys 26 are anchored to the seabed. It should be noted that the wires 24 are equipped with tension accumulators (not shown) for absorbing tension forces. At the same time the wires 24 are adapted in length so that tidal variations do not influence the arrangement.
A floating unit 22 is illustrated in detail in fig. 4. The floating unit 22 comprises a float 40 attached by means of an articulated joint 42 to a cylindrical rod or stabiliser unit 44. To the stabiliser unit 44, above the float 40, is attached a framework 46, .
which absorbs forces in the horizontal and vertical direction for each floating unit 22. The float 40 is made of an outer layer of glass fibre or the like, and provides buoyancy to the floating unit 22. The float 40 is substantially rounded in shape to enable it to move flexibly over the waves, and the articulated joint 22 also assists in this since the float 40 can pivot both about the longitudinal axis of the articulated joint 42 and about the axis perpendicular thereto, at the attachment of the articulated joint 42 to the stabiliser unit 44.
The stabiliser unit 44 is elongated, extending at a depth beneath the surface. The stabiliser unit 44 preferably consists of a steel pipe filled with concrete or the like, and its purpose is to stabilise the floating unit 22 in the water so that it maintains a stable vertical position, while at the same time the stabiliser unit 44 will be able to have a damping effect on the dynamic moment forces that may influence the floating unit 22 due to wave motion.
The floating units 22 are interconnected by attachment means 48 in the framework 46. The attachment means 48 are illustrated in detail in sections A and B in fig. 5, taken from fig. 4. The attachment means 48 are mounted at each corner of the framework 46, and comprise a substantially protruding element 50 (section A) adapted to be able to be received in a substantially hollow element 52 (section B). In the embodiment, therefore, each floating element can be attached to four other floating elements.
It should be noted that the attachment means 48 in fig. 5 are illustrated from above, and that in fig. 4 it can be seen that the attachment means 48 have a longitudinal extension. By this means the protruding element 50 can be moved up and down in the vertical direction relative to the hollow element 52. At the same time it can be seen that the attachment means 48 prevent relative horizontal motion of the floating units 22.
This is also illustrated in more detail in fig. 6, where four floating units 22 are shown displaced relative to one another in the vertical direction. Also depicted here are parts Of a hydraulic system 60. The hydraulic system 60 comprises a number of pump units, which can be seen as a number of rectangular boxes in fig. 6. These pump units are driven by a rotating cogwheel that runs along a toothed rack along the corner of the framework 46 in the adjacent floating unit. The pump unit will be driven when there is relative vertical motion of the floating units, and hydraulic fluid will be pumped to the above-mentioned generating units 28. In an alternative embodiment (fig. 7) the energy is produced by hydraulic cylinders 80 driving the fluid and thereby driving the units.
The generating units 28 utilise the hydraulic pressure to produce electric energy, which is then transferred via the submarine cables 12 to land. The hydraulic fluid at low pressure is then returned to the pump units. The hydraulic system may also include accumulator units for balancing pressure variations. Furthermore, transmission channels in the hydraulic system are preferably provided inside hollow tubes composed of the framework 46, whereby the transmission channels can be shielded from external stresses.
A number of alternative embodiments of the invention may be envisaged. In one alternative embodiment (illustrated in fig. 7) the float 40 is integrated in a lower part of the framework. Moreover, there are a number of alternative ways of joining the floating units together, where, for example, the attachment means may comprise rails with track wheels, etc.

Claims

1. A wave power generating plant, comprising an arrangement (20) of interconnected floating units (22), where the arrangement (20) is anchored to the seabed via mooring buoys (26), and where each floating unit comprises a floating pontoon (40) connected to a stabiliser unit (44) and where each floating unit (22) is further connected to at least one adjacent floating unit (22) by connecting means (48), characterised in that the connecting means (48) permit a free vertical motion of the floating units (22) relative to one another, while at the same time the connecting means (48) keep the interconnected floating units (22) in a substantially constant relative relationship in the horizontal plane, whereby the relative vertical motion of the floating units (22) due to wave influence is transferred via an energy transmission device which in turn drives a power-producing unit.
2. A wave power generating plant according to patent claim 1, characterised in that the energy transmission device comprises a hydraulic system (60) comprising a number of pump units for generating pressure in a hydraulic fluid in the hydraulic system, and at least one generating unit (28) for utilising the pressure generated in the hydraulic fluid for production of electric energy.
3. A wave power generating plant according to patent claim 2, characterised in that the pump units are driven by the relative vertical motion of the floating units (22).
4. A wave power generating plant according to patent claim 3, characterised in that the floating units comprise a horizontal toothed rack which, on relative motion of the floating unit relative to adjacent floating units, rotates a cogwheel in the adjacent floating unit, whereupon the cogwheel drives one of the pump units.
5. A wave power generating plant according to one or more of the preceding claims, where the floating units pump hydraulic fluid to the unit in series or in parallel.
PCT/NO2005/000326 2004-09-13 2005-09-08 Wave power generating plant WO2006031121A1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP05786626.1A EP1805413B1 (en) 2004-09-13 2005-09-08 Wave power generating plant
US11/575,133 US7629703B2 (en) 2004-09-13 2005-09-08 Wave power generating plant

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
NO20043825A NO320518B1 (en) 2004-09-13 2004-09-13 Bolgekraftverk
NO20043825 2004-09-13

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US (1) US7629703B2 (en)
EP (1) EP1805413B1 (en)
NO (1) NO320518B1 (en)
WO (1) WO2006031121A1 (en)

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WO2009118425A1 (en) * 2008-03-24 2009-10-01 Munoz Saiz Manuel System for the collection and attenuation of sea wave energy using a system comprising plates arranged in a rectangular manner
DE102008048730A1 (en) * 2008-09-24 2010-04-08 Philipp Sinn Wave-or pulse power plant for converting water wave energy into e.g. electrical energy, has flotation chambers prestressed against carrier structure such that kinetic energy of chambers is transferable to conversion mechanism
US8183708B2 (en) * 2008-07-25 2012-05-22 Carl Stanley Reiff Open ocean wave energy converter with isolated stabilization floats
WO2013072633A1 (en) * 2011-11-16 2013-05-23 Windeck Claude Device for producing energy by recovering and converting energy from waves

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US7755211B2 (en) * 2006-06-17 2010-07-13 Montgomery James Scott Rigid structural array
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IL190300A0 (en) * 2008-03-19 2009-09-22 S D E Ltd System and method for water desalination and other uses
JP2012505349A (en) * 2008-10-09 2012-03-01 イー・アイ・デュポン・ドウ・ヌムール・アンド・カンパニー Wave energy converter
US8803346B2 (en) * 2009-03-09 2014-08-12 Natural Power Concepts, Inc. System and method for generating electricity using grid of wind and water energy capture devices
PT2507506T (en) * 2009-12-04 2019-12-04 Henry Terry Ocean driven energy plant
NO20100589A1 (en) * 2009-12-23 2011-06-24 Nader Hassavari Device for utilization of bulge energy
US8727872B2 (en) 2011-02-23 2014-05-20 Igt Gaming system, gaming device and method for normalizing different features of an on-demand bonus game
DE102013201716B4 (en) * 2013-02-01 2015-06-03 Sinn Power Gmbh LINEAR GENERATOR AND LINEAR DRIVE
AU2014384765B2 (en) 2014-02-27 2018-11-01 Maciej STAMIRSKI A wave energy conversion arrangement
US9347425B2 (en) * 2014-06-03 2016-05-24 Christopher Wright Offshore floating barge to support sustainable power generation
DE102015121371B4 (en) * 2015-12-08 2018-11-15 Aerodyn Consulting Singapore Pte Ltd Offshore wind farm
TWI680229B (en) 2016-11-25 2019-12-21 財團法人工業技術研究院 Separable buoy
US9957018B1 (en) * 2017-02-07 2018-05-01 Cvetan Angeliev System for wave amplifying, wave energy harnessing, and energy storage
GB2559996A (en) * 2017-02-23 2018-08-29 Sustainable Marine Energy Ltd Flowing water power generating device

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1497205A (en) 1922-06-14 1924-06-10 Charles F Boosinger Wave motor
GB291265A (en) 1927-08-27 1928-05-31 Soma Prisner Power plant for utilising the energy of seas, lakes and the like
US3204110A (en) 1961-07-07 1965-08-31 Masuda Yoshio Ocean wave electric generator
DE2415517A1 (en) 1973-04-04 1974-10-24 Zanetti Streccia Giuseppe DEVICE FOR GENERATING ENERGY
US4622473A (en) 1984-07-16 1986-11-11 Adolph Curry Wave-action power generator platform
US4742241A (en) 1986-04-01 1988-05-03 Melvin Kenneth P Wave energy engine
DE19515138A1 (en) 1995-04-25 1996-10-31 Marcus Dr Fedder Wave power station e.g. for sea or ocean
DE19615115A1 (en) 1996-04-17 1997-10-23 Hagenbaeumer Michael A Wave-powered power generation plant

Family Cites Families (66)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US632826A (en) * 1898-11-04 1899-09-12 Merrill B Rice Wave-motor.
US1244309A (en) * 1916-09-14 1917-10-23 William Clay Fox Wave-motor.
US1766457A (en) * 1928-04-23 1930-06-24 Charles H Ruth Wave and tide motor
US3758788A (en) * 1971-06-14 1973-09-11 D Richeson Conversion system for providing useful energy from water surface motion
US3777494A (en) * 1972-01-10 1973-12-11 A Soderlund Wave energy motors
US4111610A (en) * 1974-06-03 1978-09-05 Brown Henry C Wave-powered, pivoted float pumping system with increasing opposition to extreme movement of lever arm
US4013382A (en) * 1975-10-14 1977-03-22 Diggs Richard E Wave power apparatus supported and operated by floats in water
US4125346A (en) * 1975-10-15 1978-11-14 Pickle William H Random wave hydraulic engine
USRE31111E (en) * 1976-02-13 1982-12-28 Williams, Inc. Wave driven generator
US4077213A (en) * 1976-02-13 1978-03-07 Williams, Inc. Wave driven generator
GB1571283A (en) * 1976-03-31 1980-07-09 Wavepower Ltd Apparatus for extracting energy from movement of water
US4092828A (en) * 1976-05-10 1978-06-06 Garza Roberto M Hydroelectric plant
US4091618A (en) * 1976-06-14 1978-05-30 Jackson Arlyn H Ocean motion power generating system
US4076463A (en) * 1976-10-26 1978-02-28 Mordechai Welczer Wave motor
US4105368A (en) * 1976-11-15 1978-08-08 Waters Fred L Floating wave powered pump
US4206601A (en) * 1978-06-26 1980-06-10 Benasutti Asst., Ltd. Compressed air producing, tidal and wave-power collection apparatus for installation in large bodies of water
US4241579A (en) * 1978-09-14 1980-12-30 Hydrodynamic Energy Systems Corporation Apparatus for producing electrical energy from multidirectional water wave action
US4560884A (en) * 1979-07-16 1985-12-24 Whittecar William C Wave power energizer
WO1981000284A1 (en) * 1979-07-24 1981-02-05 A Paolucci Wave driven generator
US4421461A (en) * 1979-09-17 1983-12-20 University Of Delaware Wave-powered desalination of seawater
US4326840A (en) * 1980-03-10 1982-04-27 University Of Delaware Wave driven pump
US4392349A (en) * 1980-07-21 1983-07-12 Hagen Glenn E Spaced apart wave generator float array
US4408454A (en) * 1980-07-21 1983-10-11 Sea Energy Corporation Fluid coupled wave generator array with subsea structure
GB2084259B (en) * 1980-07-22 1984-06-13 Kawasaki Heavy Ind Ltd Wave activated power generation system
US4512886A (en) * 1981-05-26 1985-04-23 University Of Delaware Wave-powered desalination of water
US4594853A (en) * 1984-03-12 1986-06-17 Wave Power Industries Wave powered generator
US4698969A (en) * 1984-03-12 1987-10-13 Wave Power Industries, Ltd. Wave power converter
US4754157A (en) * 1985-10-01 1988-06-28 Windle Tom J Float type wave energy extraction apparatus and method
US4684815A (en) * 1986-01-10 1987-08-04 Gary Gargos Power plant driven by waves
DK166969B1 (en) * 1990-10-03 1993-08-09 Danish Wave Power HUMAN POWER PLANT
US5186822A (en) * 1991-02-25 1993-02-16 Ocean Resources Engineering, Inc. Wave powered desalination apparatus with turbine-driven pressurization
WO1994015096A1 (en) * 1991-04-02 1994-07-07 Sieber Joseph D Wave powered energy generator
US5247899A (en) * 1992-06-04 1993-09-28 Boesser Sara L Ramp and platform harbor access system
US5411377A (en) * 1993-03-17 1995-05-02 Houser; Michael P. Mass displacement wave energy conversion system
KR100254657B1 (en) * 1996-04-18 2000-05-01 심현진 Power generating method using waves and the device
SE508308C2 (en) * 1996-04-29 1998-09-21 Ips Interproject Service Ab wave energy converters
SE508307C2 (en) * 1996-04-29 1998-09-21 Ips Interproject Service Ab wave energy converters
JP4128241B2 (en) * 1996-12-03 2008-07-30 大洋プラント株式会社 Wave power pump operating with wave energy
US5846028A (en) * 1997-08-01 1998-12-08 Hydralift, Inc. Controlled pressure multi-cylinder riser tensioner and method
NZ505410A (en) * 1997-12-03 2002-02-01 Dick William A wave energy converter
GB9804770D0 (en) * 1998-03-07 1998-04-29 Engineering Business Ltd Apparatus for extracting power from moving water
US6291904B1 (en) * 1998-08-21 2001-09-18 Ocean Power Technologies, Inc. Wave energy converter utilizing pressure differences
GB9820704D0 (en) * 1998-09-24 1998-11-18 Yemm Richard Wave energy convertor
US6388342B1 (en) * 1999-07-28 2002-05-14 Richard C. Vetterick, Sr. Hydro electric plant
US6768216B1 (en) * 2000-05-26 2004-07-27 Ocean Power Technologies, Inc. Wave energy converters utilizing pressure differences
US6647716B2 (en) * 2000-06-08 2003-11-18 Secil Boyd Ocean wave power generator (a “modular power-producing network”)
IES20000493A2 (en) * 2000-06-16 2002-02-06 Wavebob Ltd Wave energy converter
US6328539B1 (en) * 2000-06-30 2001-12-11 Sheng Hu Hung Hydraulic device powered by wave
US7121536B2 (en) * 2002-01-09 2006-10-17 Pond Doctor, Inc. Wave generator with oxygen injection for treatment of a body of fluid
WO2004007953A1 (en) * 2002-07-11 2004-01-22 Alvin Kobashikawa Wave energy conversion device for desalination, etc.
CA2505634A1 (en) * 2002-10-10 2004-04-22 Independent Natural Resources, Inc. Buoyancy pump power system
US6953328B2 (en) * 2002-10-10 2005-10-11 Independent Natural Resources, Inc. Buoyancy pump device
US7257946B2 (en) * 2002-10-10 2007-08-21 Independent Natural Resources, Inc. Buoyancy pump power system
GB0307827D0 (en) * 2003-04-04 2003-05-07 Ocean Power Delivery Ltd Wave power apparatus
JP2007508488A (en) * 2003-10-14 2007-04-05 ウェーブ・スター・エナジー・アンパルトセルスカブ Wave generator with float and means for fixing float above sea level
US6812588B1 (en) * 2003-10-21 2004-11-02 Stephen J. Zadig Wave energy converter
NO321085B1 (en) * 2004-04-02 2006-03-13 Asbjorn Skotte Bolgekraftverk.
US7391127B2 (en) * 2004-11-09 2008-06-24 Shamil Sami Ayntrazi Renewable energy wave pump
AP2007004056A0 (en) * 2004-12-16 2007-08-31 Independent Natural Resourcs I Buoyancy pump power system
GB0501553D0 (en) * 2005-01-26 2005-03-02 Nordeng Scot Ltd Method and apparatus for energy generation
US20060202483A1 (en) * 2005-03-14 2006-09-14 Gonzalez Enrique J Capturing energy from the rise and fall of the tides and waves of the ocean
US20070130929A1 (en) * 2005-12-13 2007-06-14 Ghazi Khan Wave power generator
US7339285B2 (en) * 2006-01-12 2008-03-04 Negron Crespo Jorge Hydroelectric wave-energy conversion system
US7245041B1 (en) * 2006-05-05 2007-07-17 Olson Chris F Ocean wave energy converter
US7755211B2 (en) * 2006-06-17 2010-07-13 Montgomery James Scott Rigid structural array
US7535117B2 (en) * 2006-06-17 2009-05-19 Montgomery James Scott Ocean wave power recovery and conversion spar buoy engine

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1497205A (en) 1922-06-14 1924-06-10 Charles F Boosinger Wave motor
GB291265A (en) 1927-08-27 1928-05-31 Soma Prisner Power plant for utilising the energy of seas, lakes and the like
US3204110A (en) 1961-07-07 1965-08-31 Masuda Yoshio Ocean wave electric generator
DE2415517A1 (en) 1973-04-04 1974-10-24 Zanetti Streccia Giuseppe DEVICE FOR GENERATING ENERGY
US4622473A (en) 1984-07-16 1986-11-11 Adolph Curry Wave-action power generator platform
US4742241A (en) 1986-04-01 1988-05-03 Melvin Kenneth P Wave energy engine
DE19515138A1 (en) 1995-04-25 1996-10-31 Marcus Dr Fedder Wave power station e.g. for sea or ocean
DE19615115A1 (en) 1996-04-17 1997-10-23 Hagenbaeumer Michael A Wave-powered power generation plant

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See also references of EP1805413A4 *

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2009118425A1 (en) * 2008-03-24 2009-10-01 Munoz Saiz Manuel System for the collection and attenuation of sea wave energy using a system comprising plates arranged in a rectangular manner
ES2365461A1 (en) * 2008-03-24 2011-10-06 Manuel Muñoz Saiz System for the collection and attenuation of sea wave energy using a system comprising plates arranged in a rectangular manner
US8183708B2 (en) * 2008-07-25 2012-05-22 Carl Stanley Reiff Open ocean wave energy converter with isolated stabilization floats
DE102008048730A1 (en) * 2008-09-24 2010-04-08 Philipp Sinn Wave-or pulse power plant for converting water wave energy into e.g. electrical energy, has flotation chambers prestressed against carrier structure such that kinetic energy of chambers is transferable to conversion mechanism
DE102008048730B4 (en) * 2008-09-24 2010-10-07 Philipp Sinn Wave or pulse power plant
WO2013072633A1 (en) * 2011-11-16 2013-05-23 Windeck Claude Device for producing energy by recovering and converting energy from waves

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NO20043825A (en) 2005-12-12
EP1805413A1 (en) 2007-07-11
NO320518B1 (en) 2005-12-12
US7629703B2 (en) 2009-12-08
US20080036213A1 (en) 2008-02-14
EP1805413B1 (en) 2014-08-20
EP1805413A4 (en) 2012-08-22
NO20043825D0 (en) 2004-09-13

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