GB2603042A - Floating wave energy converter - Google Patents
Floating wave energy converter Download PDFInfo
- Publication number
- GB2603042A GB2603042A GB2117563.3A GB202117563A GB2603042A GB 2603042 A GB2603042 A GB 2603042A GB 202117563 A GB202117563 A GB 202117563A GB 2603042 A GB2603042 A GB 2603042A
- Authority
- GB
- United Kingdom
- Prior art keywords
- wave energy
- energy converter
- electromagnetic device
- electromagnetic
- floating
- 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.)
- Pending
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Classifications
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- 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
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- 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
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
- H02K7/18—Structural association of electric generators with mechanical driving motors, e.g. with turbines
- H02K7/1869—Linear generators; sectional generators
- H02K7/1876—Linear generators; sectional generators with reciprocating, linearly oscillating or vibrating parts
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- 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"
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- 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
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- 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
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
- H02K7/18—Structural association of electric generators with mechanical driving motors, e.g. with turbines
- H02K7/1869—Linear generators; sectional generators
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- 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
- F05B2220/00—Application
- F05B2220/70—Application in combination with
- F05B2220/706—Application in combination with an electrical generator
- F05B2220/707—Application in combination with an electrical generator of the linear type
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- 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
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- 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
- F05B2260/30—Retaining components in desired mutual position
- F05B2260/302—Retaining components in desired mutual position by means of magnetic or electromagnetic forces
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- 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
- F05B2260/404—Transmission of power through magnetic drive coupling
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- 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
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Other Liquid Machine Or Engine Such As Wave Power Use (AREA)
Abstract
A floating wave energy converter with multiple floating buoys 1 which move up and down along upright columns 2 when a wave passes the converter. The base of the columns is connected to a submerged structure 3. Inside the columns is a generator (10, fig.2) with a force transmission strut (6, fig.2) connected to an electromagnetic device (7, fig. 2), which is locked to the magnetic field of an electromagnetic apparatus (8, fig.2) within the floating buoys. Movement of the floating buoy transfers movement to the strut and converts to electric energy in the generator. Each floating buoy may have several columns. The electromagnetic device may have permanent magnets and one or more coils around an amplifying ferromagnetic material on the floating buoy and on the force transmission rod. There may be a bearing 4 placed between the column and the submerged structure to harness the rotational motion for energy conversion.
Description
Floating wave energy converter Purpose of the invention The purpose of the invention is to provide an environmental friendly and efficient wave energy converter which takes care of the demand of the maintenance aspect and at the same time will be cost efficient.
Several wave energy converters uses the relative movement between two bodies as the basis for energy converting to electric energy. This could be done as one body transfer its motion to a generator on the other body mechanically with a piston rod which need to go through an outer surface of the other body. Gasket problems with bushings in moving parts in marine environment is a well known problem. This sealing problem could be avoided, achieved according to the invention by 1) a magnetic coupling which transfer the movement of the buoyancy element directly to the generators force transmission strut without any other mechanically coupling to avoid wear and destroying of gaskets, 2) the generator is placed inside a pipe construction and mounted easily for replacement if necessary, 3) the generator is placed inside a pipe column construction and do not need water proof gaskets related to moving parts in water conditions, 4) the confined room in the pipe column construction could be preserved with nitrogen to prevent corrosion on important components. Mounting several buoys on a common base construction, the buoys will utilize both up, down, for-and backward force in the wave for maximal energy absorption, simultaneous as the anchoring system simplifies.
The background for the invention
It is raised over any doubt that the energy density of waves is significant counted per square meter sea surface. Today there is numerous of ideas, suggestions and tests of different wave energy converters, but the big breakthrough is not yet come. The reason is mainly linked to 1) costs in relation to effect, 2) structurally integrity in extreme sea state conditions and 3) maintenance and lifetime aspects.
There are a lot of suggested wave energy converters and there are still coming new ones. Examples of known solutions are buoys fastened to a fixed foundation to the seabed with a wire able to convert energy by raise and sink movements as the wave passes through. The energy absorption can be taken up by the relative movement either in the foundation structure or in the buoy element. There are also wave energy converters consisting of a floating buoy which can glide vertical along a pipe column connected to a submerged damping construction where the energy is taken out from the relative raise and sink movement between the buoy and the pipe column construction with a generator inside. For the buoys where the generator is placed inside the pipe column the earlier force transmission principle between buoy and generator has been through a piston rod with a gasket between the two components. The piston rod will move up and down the gasket and will be exposed to wear and tear with risk of the need to be replaced over time frequently. Over a year there will be approximately 5 million cycles of load changes.
Freestanding single buoys need to be anchored and can cause a complicated subsea system of lines in case of a big wave energy facility.
The benefits by using the presented invention is primarily 1) easy interchangeable energy converters due to installation and service, 2) the energy converters are placed in closed room filled with nitrogen and preserved against corrosion and not exposed for were and tear in marine environment, which is well known problem, 3) energy efficiency obtained by utilize both raise, sink, for-and backward movement in the waves, 4) the common base construction ensures that the whole unit mainly follows the big waves up and down to prevent overloading, but is located steady for the sea states which is significant for energy converting, 5) common base construction simplifies the anchoring system, 6) independent of wave direction, 7) independent of water depth and 8) it can be used in almost any ocean areas. The facility is friendly for the environment and not be towering in the coastal area. In terms of construction it consist of well known components, both concerning technical documentation, fabrication, optimization and installation.
Short summary
Floating wave energy converter consisting of several buoys with buoyancy elements (1) as moves up and down along a pipe column (2) which is fastened to a common submerged base construction (3) c ha r a cte ri zed by the generators force transmission strut (6) is fastened to a magnetic device (7) which is locked to the magnetic force field provided by a magnetic device (8) on the buoyancy element (1) such that the movement from the buoyancy element transfers to the magnet device (7) on the generators force transmission strut (6). Each buoyancy element (1) can have several pipe columns (2). It is a prerequisite that the pipe column is made by a non-ferromagnetic material preferably composite material which do not disturb the magnetic field on the buoyancy element through the pipe column.
Short description of the drawings
In the following the invention is explained using examples illustrated on drawings where the same components are given the same reference numbers. The drawings are showing: Figure 1 Wave energy converter unit with buoys/buoyancy elements showing typical arrangement of a wave energy converter according to the new invention.
Figure 2 Shows the main components of the magnetic device which couples the buoyancy element to the generator using the principle that different poles are attracting each other.
Figure 3A Section through a buoy showing an electromagnetic coupling in the new invention based on the principle that different poles are attracting each other.
Figure 35 Detailed section of the electromagnetic coupling from figure 3A.
Figure 4A Section through a buoy showing an alternative configuration of magnet in the buoy and magnet on the force transmission strut.
Figure 45 Detailed section of the electromagnetic coupling from Figure 4A.
Figure 5A Section through a coupling with several electromagnets in series.
Figure 5B Section through a coupling with several electromagnets in series.
Figure 6 Wave converter facility with several wave energy converters.
Figure 7A Wave converter unit with several pipe columns on each buoy.
Figure 75 Showing more details of buoy with several columns on each buoy.
Figure 8 Showing an example of arrangement of magnet configuration in plan view.
When referring to figure 1, figure 2, figure 3A, figure 35, figure 4A, figure 45, figure 5, figure 6, figure 7A, figure 75 figure 8 it is described typical execution examples of the invention.
Figure 1 Showing an arrangement of wave energy converter with 9 buoys mounted on a common base construction. The buoyancy element (1) can move up and down along the pipe column (2) which is fastened to the base construction (3) with the bearing construction (4). The buoys on each corners are supplied with elastic springs (5).
Figure 2 Showing the buoyancy element (1) which can move up and down along the pipe column (2) which is connected to the base construction (3) with the bearing construction (4). The generator (10) is mounted and fixed inside the pipe column (2), and there is no mechanical connection between the buoyancy element (1) and the electromagnetic device (7). All transfer of force is due to the magnet field between the two magnets (7) and (8). The pipe column (2) must be made of non-ferromagnetic material in the interaction area for the magnets movement area. The bearing construction (4) between the pipe column and the base construction is designed as a cardan shaft and is shown with a device (30) which can convert swaying motion in to electric energy.
Figure 3A Section through one of the buoys showing the buoys essential components with the buoyancy element (1) which can move up and down along the pipe column (2) which is connected to the base construction (3) with the bearing connection (4). The buoyancy element is further connected the pipe column (2) with an elastic spring (5). The generator (10) is placed inside the pipe column and mounted in the upper part (11) of this. The invention comprise that the electromagnetic device (8) which is fastened on the buoyancy element locks the electromagnetic device (7) on the force transmission strut (6) to the buoyancy elements movements due to the electromagnetic fields between the two devices (7) and (8), using the principle that different poles are attracting each other.
Figure 3B Showing more in detail the main components in the electromagnetic devices (7) and (8) which connects the buoyancy element (1) to the generator (10). The electromagnetic device (8) consisting of current leading coiled windings (12) together with a ferromagnetic amplifying pipe (13) setting up a magnetic field which locks to the magnetic field on the electromagnetic device (7) on the force transmission strut (6).
Figure 4A Section through a buoy similar to figure 3A, but with another arrangement of the magnetic device.
Figure 4B Showing an execution of the invention were the electromagnetic device consist of coiled windings (12) and the amplifying ferromagnetic pipe element (13) on the buoyancy element (1) and the electromagnetic device (7) on the force transmission strut (6) by the principle that different poles are attracting each other.
Figure 5A and 5B Showing section of magnets coupled in series for handling of large forces.
Figure 6 Showing a wave energy converter facility consisting of several units slack anchored (20) to the sea bed.
Figure 7A and 7B Showing a wave converter unit where each buoy has several pipe columns, in this case there are tree eccentric and one in the center of the buoy. The buoyancy element (1) moves up and down along the pipe columns (2), as well as sideway and rotates around the lower bearing construction (4) which is the constructions rotation center. This gives relative movement in the pipe columns as the waves passes through, and can be utilized for energy converting. The buoyancy element is further connected to the pipe column (2) with an elastic spring (5). The generators (10) are placed inside the pipe columns and fixed from the upper end (11) of these. The invention comprises that the electromagnetic devices (8) which is fastened on the buoyancy element locks the electromagnetic device (7) on the force transmission strut (6) to the buoyancy elements (1) movements due to the electromagnetic fields between the two devices by the principle that different poles are attracting each other.
Figure 8 Showing a possibly effective configuration of magnets with horseshoe shaped magnets concentrating the magnetic field for high locking potential between the buoyancy element (1) and the force transmission strut (6) due to the magnetic field between the magnetic devices (7) and (8). The configuration will be scalable along the pipe column axis similar as illustrated in figure 5A and 5B to ensure desired locking capacity.
Concrete examples
The invention comprise a buoyant wave energy converter consisting of several movable buoys which is attached to a common submerged base construction (3) which utilize electromagnetic couplings from an electromagnetic device (8) to lock the electromagnetic device (7) to the buoyancy elements (1) movement. The buoyancy element on each buoy can move up and down along a pipe column configuration (2), which need to be of a non-ferromagnetic material. Inside each pipe column there is a generator (10). The generators force transmission strut (6) is fastened to an electromagnetic device (7) which is locked into the electromagnetic force field from the electromagnetic device (8) on the buoyancy element such that the movement of the buoyancy element transfers to the to the electromagnetic device (7) and thus further into the generators force transmission strut without any other mechanical coupling. When the waves passes through the construction the buoy elements will move up and down as well as sideways and gives rotation angle between the base construction. Both these characteristic movements can be utilized for energy converting. The vertical force in connection with up and down movement of the buoyancy element and energy converting will be balanced of the base construction (3) due to hydrodynamic damping and mass, while the horizontal force and complying bending moments to the base construction from a buoyancy element will be balanced by opposite buoy elements and vice versa, as well as damping water mass around the base construction. The base construction will be stabilized of the waterline area to the buoy elements, despite of their movement. In addition will the case shaped corners of the base construction work as hydrodynamic damping plates, such that the base construction will have little heave pitch and roll movement in the sea states which contribute the most for energy production during the year. For the most extreme sea states the construction will mainly follow the waves and thus not be over loaded.
Magnetic fields have the property that unlike poles are attracting each other, locking occurs configuring the magnet fields in the electromagnetic device (7) in the opposite direction of the magnetic field on the device (8) on the buoy element, see figure 3B, 4B, 5A and 5B, adjusting the direction of the electric current. An electro magnet mainly consist of a ferromagnetic material, typical iron, with copper wire windings coiled around. Ferromagnetic material has the property to effectively amplify the magnetic field which the current leading wires generate. The invention utilize this property to ensure sufficient locking of the electromagnetic device (7) to run the generator by the force transmission strut. Ordinary permanent magnets can principally also be used, but these magnets has some lower magnetic field and will therefore not have the same locking capacity comparing to electromagnets, but have benefits due to their simplicity.
The electromagnetic device (8) on the buoyancy element and the device (7) could be built up as electromagnets. A suitable electromagnet on the buoyancy element can consist of a ferromagnetic ring (13) with coiled windings (12) around. The device (7) could be made of either a ferromagnetic ring or a massive kernel with windings. The flux lines goes in the direction of the pipe column and are concentrated near the electromagnets. The magnets can be coupled in series, see figure 5A, such that sufficient locking force is ensured to be able to take out optimal energy of the generator.
There is several variants of geometry and arrangements with kernel and windings or permanent magnets which could give a suitable configuration of magnetic fields as well as the principle of similar poles are repelling each other could be utilized. A configuration with horseshoe shaped magnets, with the flux lines in radial direction are shown in figure 8, achieving efficient locking between the magnetic devices (7) and (8). Magnetic fields are well known in industry context and configurations can be optimized with calculations tools and testing.
The spring element (5) shall ensure that the base construction (3) and the pipe column (2) is balanced at correctly level with respect to the buoyancy elements in the quiet water condition. The base construction is ballasted such that the correct balance is obtained. This balance can also be obtained by using the magnetic locking between the electromagnetic devices (7) and (8) and construct a balance obtaining device inside the pipe column with an electric controlled motor, spring or a compensating cylinder. For wave energy converters with several pipe columns the spring element could be omitted.
The construction is scalable and could be optimized for different sea areas and sea states where it is intended to operate. In the Northern Sea, the sea states characterized with a significant wave height (Hs) from 1,5 to 4,5 meters contribute to approximately 8 5 % of the total energy converting.
Claims (5)
- Claims 1. Floating wave energy converter consisting of several buoys with buoyancy elements (1) which moves up and down along a pipe column (2) which is fastened to a common submerged base construction (3) characterized by the generators force transmission strut (6) is fastened to an electromagnetic device (7) which is locked to the electromagnetic force field provided by an electromagnetic device (8) on the buoyancy element (1) such that the movement from the buoyancy element transfers to the electromagnetic device (7) on the generators force transmission strut (6).
- 2. Floating wave energy converter according to claim 1, cha ra cteri zed by each buoyancy element (1) has several pipe columns (2).
- 3. Floating wave energy converter according to claim 1-2, ch a ra cteri zed by the electromagnetic device consist of one or more coil configurations (12) around an amplifying ferromagnetic material (13) on the buoyancy element (1) and on the electromagnetic device (7) on the force transmission strut (6).
- 4. Floating wave energy converter according to claim 1-3, ch a ra cteri zed by the device (7) and device (8) consists of permanent magnets.
- 5. Floating wave energy converter according to claim 1-4, ch a ra cteri zed by an electric generator device (30) in the bearing construction (4) that utilize the rotation motion between the pipe column (2) and the base construction (3) for energy converting.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| NO20201375A NO346358B1 (en) | 2020-12-15 | 2020-12-15 | Floating wave energy converter unit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| GB202117563D0 GB202117563D0 (en) | 2022-01-19 |
| GB2603042A true GB2603042A (en) | 2022-07-27 |
Family
ID=80080961
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB2117563.3A Pending GB2603042A (en) | 2020-12-15 | 2021-12-06 | Floating wave energy converter |
Country Status (2)
| Country | Link |
|---|---|
| GB (1) | GB2603042A (en) |
| NO (1) | NO346358B1 (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20090085357A1 (en) * | 2005-12-01 | 2009-04-02 | Ocean Power Technologies, L | Wave energy converter with internal mass on spring oscillator |
| US20100117366A1 (en) * | 2007-03-02 | 2010-05-13 | Kenneth Rhinefrank | Methods and apparatus for power generation |
| US8629572B1 (en) * | 2012-10-29 | 2014-01-14 | Reed E. Phillips | Linear faraday induction generator for the generation of electrical power from ocean wave kinetic energy and arrangements thereof |
| CN110224572A (en) * | 2019-06-21 | 2019-09-10 | 兰州理工大学 | A kind of rectilinear water vibrational energy capture electricity generation system |
| CN210422862U (en) * | 2019-04-08 | 2020-04-28 | 广东海洋大学 | Linear cylindrical wave buoy power generation device and ocean power generation device thereof |
| CN113335467A (en) * | 2021-05-28 | 2021-09-03 | 哈尔滨工业大学（深圳） | Ocean floating platform based on wave energy and solar energy combined power generation |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS55160967A (en) * | 1979-05-30 | 1980-12-15 | Yasuhiro Manabe | Multimagnet electric generator employing vertical motion of wave |
| JPH06280733A (en) * | 1993-03-24 | 1994-10-04 | Taiyo Plant Kk | Electromagnetic induction type wave activated power generating set |
| WO2005005827A1 (en) * | 2003-07-07 | 2005-01-20 | Couceyro, Adrienne | Electromagnetic piston for water-pumping windmills |
| US7199481B2 (en) * | 2003-11-07 | 2007-04-03 | William Walter Hirsch | Wave energy conversion system |
| US7420287B2 (en) * | 2006-03-28 | 2008-09-02 | Aleksandr Smushkovich | Intermittent force powered electromagnetic converters especially for sea waves |
| DE102010047965A1 (en) * | 2010-10-08 | 2012-04-12 | Heinrich Schmid | Linear generator used in water wave power plant, has float that moves along up-and-down direction in fluid due to magnetic field of permanent magnet, so as to generate and induce voltage into stator winding |
| CN102003330B (en) * | 2010-12-09 | 2012-08-08 | 大连海事大学 | Mixed wave force power-generating device |
| ES2379520B1 (en) * | 2011-12-12 | 2012-11-08 | Fabián Herreros Hidalgo | ELECTRICAL ENERGY GENERATION SYSTEM FROM UNDIMOTRIC ENERGY. |
| CN205423052U (en) * | 2015-12-10 | 2016-08-03 | 中国海洋大学 | Wave energy straight line power generation facility |
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2020
- 2020-12-15 NO NO20201375A patent/NO346358B1/en unknown
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2021
- 2021-12-06 GB GB2117563.3A patent/GB2603042A/en active Pending
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| US20090085357A1 (en) * | 2005-12-01 | 2009-04-02 | Ocean Power Technologies, L | Wave energy converter with internal mass on spring oscillator |
| US20100117366A1 (en) * | 2007-03-02 | 2010-05-13 | Kenneth Rhinefrank | Methods and apparatus for power generation |
| US8629572B1 (en) * | 2012-10-29 | 2014-01-14 | Reed E. Phillips | Linear faraday induction generator for the generation of electrical power from ocean wave kinetic energy and arrangements thereof |
| CN210422862U (en) * | 2019-04-08 | 2020-04-28 | 广东海洋大学 | Linear cylindrical wave buoy power generation device and ocean power generation device thereof |
| CN110224572A (en) * | 2019-06-21 | 2019-09-10 | 兰州理工大学 | A kind of rectilinear water vibrational energy capture electricity generation system |
| CN113335467A (en) * | 2021-05-28 | 2021-09-03 | 哈尔滨工业大学（深圳） | Ocean floating platform based on wave energy and solar energy combined power generation |
Also Published As
| Publication number | Publication date |
|---|---|
| GB202117563D0 (en) | 2022-01-19 |
| NO20201375A1 (en) | 2022-05-30 |
| NO346358B1 (en) | 2022-06-27 |
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