GB2050522A - Apparatus for Extracting Energy from Waves - Google Patents
Apparatus for Extracting Energy from Waves Download PDFInfo
- Publication number
- GB2050522A GB2050522A GB8013276A GB8013276A GB2050522A GB 2050522 A GB2050522 A GB 2050522A GB 8013276 A GB8013276 A GB 8013276A GB 8013276 A GB8013276 A GB 8013276A GB 2050522 A GB2050522 A GB 2050522A
- Authority
- GB
- United Kingdom
- Prior art keywords
- channel
- energy extraction
- extraction apparatus
- energy
- inverted
- 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.)
- Granted
Links
- 238000000605 extraction Methods 0.000 claims description 36
- 239000007788 liquid Substances 0.000 claims description 15
- 239000012530 fluid Substances 0.000 claims description 12
- 230000033001 locomotion Effects 0.000 claims description 12
- 230000009471 action Effects 0.000 claims description 6
- 230000005540 biological transmission Effects 0.000 claims description 3
- 230000002706 hydrostatic effect Effects 0.000 claims description 2
- 239000013535 sea water Substances 0.000 description 9
- 238000005192 partition Methods 0.000 description 7
- 238000010276 construction Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000010355 oscillation Effects 0.000 description 2
- 241000237858 Gastropoda Species 0.000 description 1
- 102100025490 Slit homolog 1 protein Human genes 0.000 description 1
- 101710123186 Slit homolog 1 protein Proteins 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 230000002457 bidirectional effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000001939 inductive effect Effects 0.000 description 1
- 230000002572 peristaltic effect Effects 0.000 description 1
- 230000001902 propagating effect Effects 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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
- F03B13/24—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 to produce a flow of air, e.g. to drive an air turbine
-
- 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
- F03B13/148—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 static pressure increase due to the wave
-
- 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
- F03B13/22—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 flow of water resulting from wave movements to drive a motor or turbine
-
- 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)
- Other Liquid Machine Or Engine Such As Wave Power Use (AREA)
Abstract
An inverted, closed-ended, channel (2) is positioned below the liquid surface so that an interface exists between liquid admitted to the channel and fluid trapped in the channel above the liquid, such that any of the waves 1 having a component of motion parallel to the longitudinal axis of the channel will induce secondary waves 10 at the interface. Energy extraction means (7) can operate either indirectly, using a turbine driven by movement of the trapped fluid brought about by propagation of the secondary waves along the channel (2), or directly, using floats, paddles or the like. <IMAGE>
Description
SPECIFICATION
Apparatus for Extracting Energy From Waves
This invention relates to apparatus for extracting energy from waves on the surface of a body of liquid (e.g. the sea).
According to the invention there is provided apparatus for extracting energy from waves on the surface of a body of liquid, comprising an inverted, closed-ended channel positioned below the liquid surface so that there is established therein an interface between liquid admitted to the channel from said body and fluid trapped in the channel above the admitted liquid such that any of the waves concerned having a component of motion parallel to the longitudinal axis of the channel will induce secondary waves at said interface, the apparatus further comprising means arranged to extract energy from the secondary waves.
Conveniently, the trapped fluid is a gas such as air but it would be possible to use a liquid providing it is immiscible with the liquid admitted to the channel.
In one preferred arrangement, the energy extraction means, in the form of a turbine, is positioned in a duct which interconnects the two ends of the channel in such manner as to convey the moving fluid from the channel to the turbine and back to the channel again, there being means, such as in the form of traps in the duct, to isolate the turbine from said liquid in the channel.
In order to improve the response of the apparatus to the waves concerned, the inverted channel may be provided with an energy collector extending lengthwise of the channel and having at least one upwardly facing inlet to sense the local hydrostatic pressure. Suitably, an upwardly facing inlet can be provided along each side of the channel, said inlet conveniently being defined between adjacent surfaces of the said inverted channel and a further, open topped, channel in which the inverted channel is arranged in parallel, spaced, relationship thereto. Partitions arranged at axial intervals can interconnect the first and second-mentioned channels.Transverse fences may be disposed within the channel at the axial locations of the said partitions, the fences extending downwardly from the top internal surface of the channel to a position above the interface existing under completely quiescent conditions.
In further modifications, the first mentioned channel can be of reducing width along the length thereof and/or the or each upwardly facing inlet can be of reducing cross-section in the direction leading into the energy extraction apparatus and/or a plurality of turbines may be used for extracting energy from the moving fluid.
Instead of harnessing the movement of the trapped fluid to drive the turbine, energy could be extracted directly from the secondary waves using one or more floats, paddles or the like.
For a better understanding of the invention, and to show how the same may be carried into effect, reference will now be made, by way of example, to the accompanying drawings, in which: Figures 1 a and 1 b are a diagrammatic perspective view, and vertical sectional view, respectively, of a simplified embodiment of the invention, used for explanatory purposes;
Figure 2a is a perspective view of a more practical embodiment, showing some details of the internal construction;
Figure 2b is a vertical sectional view through one end of an inverted channel forming part of the energy extraction apparatus shown in Figure 2a;
Figure 2c is a cross-sectional view of the inverted channel;
Figure 3a is a diagrammatic longitudinal sectional view of a practical arrangement;;
Figures 4a to 8a are corresponding views of additional embodiments of the invention; and
Figures 3b to 8b are cross-sectional views taken along the lines Ill to VEIL, respectively, of
Figures 3a to 8a.
Referring to Figures 1 a, 1 b apparatus for extracting energy from waves 1 on the surface of the sea comprises a channel or trough 2, closed at each end by an end wall 8, arranged in inverted disposition below the waves so that it is open at the bottom to admit seawater into the trough to establish therein an interface between the sea water and a fluid 4, conveniently air, trapped in the channel above the sea water. The theoretical interface for the hypothetical case of a completely flat sea surface is indicated at 5. A duct 6, incorporating therein an air turbine 7 coupled to a generating set (not shown), interconnects, via a path passing above the channel 2, openings 3 formed in the end walls 8 in the upper parts thereof, so as to be in communication with the trapped air.
Referring to Figure 1 b, the surface waves 1 have a component of movement in the longitudinal direction of the channel 2 indicated by arrow 9, and the motion of these waves 1 induces travelling waves 10 at the sea-air interface in the channel 2, the crests of these induced waves propagating in the same direction as the surface waves 1. Preferably, as shown in
Figure 1 b the crests of the waves 10 sweep along the top internal surface of the channel and this produces a peristaltic effect in that the "slugs" of trapped air between successive crests are carried along the channel and discharged from one end into the duct 6 to pass to the air turbine 7 which is driven accordingly, the exhausted air from the turbine being returned to the other end of the inverted channel.Thus, the effect of the motion of the surface waves 1 is to bring about a continuing circulation of air through the turbine to provide a source of energy. Of course, it will be appreciated that the described apparatus can still work if the crests of the induced waves do not actually contact the top internal surface of the channel, but under such conditions the overall efficiency will be correspondingly reduced.
Under normal circumstances it is necessary to ensure that no sea water be allowed to enter the air turbine 7, particularly in the case of a modification in which the air turbine is disposed below the channel 2. For this purpose, irrespective of the precise position of the air turbine 7, the end portions 6' of the duct 6, immediately connected with the openings in the ends of the inverted channel, are angled upwardly from the end walls 8 so as to constitute water traps such that any sea water entering the traps 6' is unable to reach any other portions of the duct or the turbine 7.
Referring now to Figures 2a to 2c, the inverted channel 2 is disposed in parallel spaced relationship within a further upwardly open, closed ended, trough or channel 11 serving as an energy collector so that between adjacent longitudinally extending wall surfaces of the channels 2, 11 there are provided upwardly facing inlets 12 (Figure 2c) disposed one along each side of the channel 2. This arrangement is to be preferred in that, as a general point, it has been found that exciting sea water pressure fluctuations due to surface wave action are greater nearer to the sea surface, and for a fully submerged energy extraction system the Figures 2a-2c construction enables the abovementioned effect to be taken full advantage of.
A convenient way of maintaining the spaced relationship between the channels 2, 11 is to use a plurality of partitions 13 arranged at spaced intervals along the length of the apparatus so as to subdivide the internal space within the apparatus into a number of individual spaces, each constituting a sea water trap. Furthermore, transverse fences 14 extending within channel 2 downwardly from the roof of the channel to a position above the undisturbed interface 5 can be arranged at the same axial positions as the partitions 13, so as to provide between each fence and respective partition a slit 1 5 through which the circulated air can pass.The fences serve to ensure a better "seal" between the crests of the induced waves and the roof of the inverted trough, are more tolerant to variations in the amplitude of induced waves oscillation, and disturb the waves far less than a horizontally extending roof surface alone.
Figures 3a and 3b show a practical design for the energy extraction apparatus. Here the roof of the inverted channel is a horizontal wall so
extending between the side walls of an inverted trough having an arched roof 51. The duct
constituted by the arched roof 51 and horizontal wall 50 serves exactly the same function as the duct 6 in Figures 1 a, 1 b, 2a and 2b.
In Figures 4a and 4b, the duct constituted by the roof 51 and wall 50 is sealed off at its ends from the interior of the inverted channel 2 and longitudinally divided by a vertical partition 52, in which is mounted the air turbine 7, to provide high and low-pressure chambers 53, 54 on opposite sides respectively of the partition 52.
The channel 2 is divided internally into cells 55 by vertical walls 58 arranged at intervals along the length of the channel 2 and extending downwardly from the horizontal wall 50 to below the level of the troughs of the induced waves in the inverted channel, and each celi 55 can communicate selectively with the high and lowpressure chambers 53, 54 via non-return valves 56, 57 such that, at any given time, the air in the cells under greater pressure will exhaust via the valve 56, high pressure chamber 53, turbine 7, low-pressure chamber 54 and valve 57 into the cells under reduced pressure, thereby driving the turbine 7 and the generating set.
Referring to Figures 5a, 5b, here a bidirectional turbine 70 is mounted in each wall 58 so as to be driven by the pressure differential existing in the two neighbouring cells 55 separated by that wall 58. In addition the two end cells 55 are interconnected by a duct 59 which divides over the major part of its length into two branches 59' which pass through the walls 58 one on each side of each turbine 70, and a further bi-directional turbine 170 is mounted in one end of the duct 59. The turbines 70, 170 are coupled to drive respective generating sets.
Another modification is shown in Figures 6a, 6b, in which each of a number of bi-directional turbines 70 is mounted in a different section of the roof 50 of the inverted channel 2 so as to communicate at one side with the interior of a respective cell 55 and at the other side with the interior of the closed-ended duct or manifold constituted by the arched roof 51 and the horizontal wall 50.
In each of the above-described embodiments, the energy of the waves induced in the inverted channel is indirectly extracted from those waves (i.e. these waves bring about an overall movement of the trapped air along the inverted channel and the energy extraction is made from the moving air). Two embodiments in which energy is extracted directly from the induced waves are illustrated in Figures 7a, 7b and 8a, 8h.
In Figures 7a, 7b, several paddles or plates 80, pivotally mounted within the channel 2, are arranged at intervals along the length of the channel so as to convert the action of the induced waves into a to-and-fro pivoting motion of plates 80. A geared transmission (not shown) is used to convert this to-and-fro pivoting motion into a high speed, rotational, input drive to a generating set.
Instead of the pivotally mounted plates 80, a succession of pivotally-mounted floats 81 can be empioyed (Figures 8a, Sb).
In all cases the inverted channel 2 and/or the inlets 12 can be of reducing width in the direction of wave propagation. Improvements in efficiency of energy extraction from the sea surface waves can be obtained in embodiments (not shown) in which, at any cross-section along the length of the energy extraction apparatus, each side wall of the open-topped channel and the proximate side wall of the inverted channel diverge from one another relative to the downward direction, and/or the internal width of the inverted channel in the region of the air/sea water interface is greater than the mean spacing between the proximate side walls of the two channels.
The length of the inverted channel is preferably chosen as a compromise between practical limitations on length and the desirability of making the channel as long as possible which tends to minimise the resistance of the trapped air to the formation and propagation of the induced waves. Also, the length of the sea water column, that is to say the distance from the inlet to the inverted trough to the interface within the trough, is generally chosen so that its natural frequency of oscillation is compatible with that of the inducing pressure fluctuations brought about by the action of the surface waves.
The described forms of energy extraction apparatus are, of course, very simple in construction while being effective in extracting energy from sea waves. They are also advantageous in that, being designed for fully submerged use, they are not exposed to the rather more severe conditions existing at the sea surface than below the sea surface.
Claims (14)
1. Apparatus for extracting energy from waves on the surface of a body of liquid, comprising an inverted, closed-ended channel positioned below the liquid surface so that there is established therein an interface between liquid admitted to the channel from said body and fluid trapped in the channel above the admitted liquid such that any of the waves concerned having a component of motion parallel to the longitudinal axis of the channel will induce secondary.waves at said interface, the apparatus further comprising means arranged to extract energy from the secondary waves.
2. Energy extraction apparatus according to claim 1, wherein the energy extracti & means is arranged to extract energy directly from the secondary waves themselves.
3. Energy extraction apparatus according to claim 2, wherein the energy extraction means comprises at least one plate pivotally mounted in the inverted channel so as to convert the action of the secondary waves into a to-and-fro pivoting motion of the or each plate, an electrical.
generator, and a geared transmission arranged to convert the pivoting motion into a high speed, rotational input drive for the generator.
4. Energy extraction apparatus according to claim 2, wherein the energy extraction means comprises at least one float situated in the inverted channel so as to rise and fall under the action of the secondary waves, an electrical generator, and a gear transmission arranged to convert the rising-and-falling motion of the or each float into a high-speed, rotational input drive for the generator.
5. Energy extraction apparatus according to claim 1, wherein the energy extraction means is arranged to extract energy from trapped fluid moving along the channel owing to the action of the secondary waves.
6. Energy extraction apparatus according to claim 5, wherein the energy extraction means, in the form of a turbine, is positioned in a duct which interconnects the two ends of the channel in such manner as to convey the moving fluid from the channel to the turbine and back to the channel again.
7. Energy extraction apparatus according to claim 6, wherein traps are provided in said duct to isolate the turbine from said liquid in the channel.
8. Energy extraction apparatus according to claim 6 or 7, wherein vertical transverse fences are arranged within the inverted channel extending downwardly from the roof of the channel to a position above the interface in said channel between said liquid and said fluid under completely quiescent conditions.
9. Energy extraction apparatus according to claim 5, wherein the inverted channel is divided internally into cells by vertical walls arranged at intervals along the length of the channel and extending downwardly from the roof of the inverted channel to below the level of the troughs of the secondary waves, and the energy extraction means, in the form of a turbine, is arranged with its high and low-pressure sides in communication with said cells via one-way valves in such manner that the continuously changing pressure of the fluid in the several cells is harnessed to drive the turbine.
10. Energy extraction apparatus according to claim 5, wherein the inverted channel is divided internally into cells by vertical walls arranged at intervals along the length of the channel and extending downwardly from the roof of the inverted channel to below the level of the troughs of the secondary waves, and the energy extraction means comprises a plurality of bi-directional turbines, each turbine being arranged to be driven by the pressure differential existing in use of the energy extraction apparatus between the two cells of a different pair.
11. Energy extraction apparatus according to claim 5, wherein the inverted channel is divided internally into cells by vertical walls arranged at intervals along the length of the channel and extending downwardly from the roof of the inverted channel to below the level of the troughs of the secondary waves, and the energy extraction means comprises a plurality of bi-directional turbines, each mounted in a different section of the roof of the inverted channel so as to have one side in communication with a respective cell, there being a common manifold above the roof of the inverted channel interconnecting the other sides of the turbines.
12. Energy extraction apparatus according to any preceding claim, wherein the open mouth of the inverted channel is provided with an energy collector extending lengthwise of the channel and having at least one upwardly facing inlet to sense the local hydrostatic pressure.
13. Energy extraction apparatus according to claim 12, wherein the energy collector is in the form of an open topped, closed ended channel inside which the inverted channel is disposed in spaced relationship thereto and extending in the same general direction so as to provide two said upwardly facing inlets.
14. Energy extraction apparatus according to claim 13 or 14, wherein the or each upwardly facing inlet is of reducing width along the length thereof in the direction of wave propagation.
1 5. Energy extraction apparatus according to any preceding claim, wherein the inverted channel is of reducing width along the length thereof in the direction of wave propagation.
1 6. Energy extraction apparatus according to claim 13, or to claim 14 or 1 5 as appended to claim 13, wherein at any cross-section along the length of the energy extraction apparatus, each side wall of the open-topped channel and the proximate side wall of the inverted channel diverge from one another relative to the downward direction.
1 7. Energy extraction apparatus according to claim 13, or to claim 14 or 15 as appended to claim 13, or to claim 16, wherein, at any crosssection along the length of the energy extraction apparatus, the internal width of the inverted channel in the region of the liquid/fluid interface is greater than the mean spacing between each side wall of the open-topped channel andithe proximate side wall of the inverted channel.
1 8. Energy extraction apparatus substantially as hereinbefore described with reference to
Figures 1 a, 1 b, 2a, 2b, 2c, 3a and 3b, or to
Figures 4a, 4b, or to 5a, 5b, or to 6a, 6b, or to 7a, 7b, or to Se, Sb of the accompanying drawings.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB8013276A GB2050522B (en) | 1979-04-24 | 1980-04-22 | Apparatus for extracting energy from waves |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB7914222 | 1979-04-24 | ||
| GB8013276A GB2050522B (en) | 1979-04-24 | 1980-04-22 | Apparatus for extracting energy from waves |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| GB2050522A true GB2050522A (en) | 1981-01-07 |
| GB2050522B GB2050522B (en) | 1982-12-22 |
Family
ID=26271318
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB8013276A Expired GB2050522B (en) | 1979-04-24 | 1980-04-22 | Apparatus for extracting energy from waves |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB2050522B (en) |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1983000889A1 (en) * | 1981-09-04 | 1983-03-17 | William Arnold Fleay | Apparatus for extracting power from wave motion |
| EP0080007A1 (en) * | 1982-03-15 | 1983-06-01 | Horst Quarz | Machine for extracting wave energy |
| WO1993015315A1 (en) * | 1992-01-28 | 1993-08-05 | Francis Norman Potter | Power generation, preferably by utilisation of wave energy |
| WO1997037122A1 (en) * | 1995-03-02 | 1997-10-09 | A.P. Van Den Berg Beheer B.V. | Sea waves energy converter |
| WO2000017518A1 (en) * | 1998-09-17 | 2000-03-30 | Alexander George Southcombe | Apparatus for harnessing wave energy |
| WO2008020190A3 (en) * | 2006-08-15 | 2008-04-24 | Neptune Energy Ltd | Apparatus for converting wave energy into electricity |
| WO2009096796A3 (en) * | 2008-01-31 | 2010-05-06 | Tenko | Wave energy device |
| US20150192102A1 (en) * | 2011-01-14 | 2015-07-09 | Roderick Charles Tasman Rainey | Wave Energy Machine |
| CN117267037A (en) * | 2023-11-07 | 2023-12-22 | 东方电气(福建)创新研究院有限公司 | A kind of back-curved wave energy power generation hull |
| WO2024051028A1 (en) * | 2022-09-05 | 2024-03-14 | 莫崇规 | Wave energy inertia hydraulic difference power generation device |
-
1980
- 1980-04-22 GB GB8013276A patent/GB2050522B/en not_active Expired
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1983000889A1 (en) * | 1981-09-04 | 1983-03-17 | William Arnold Fleay | Apparatus for extracting power from wave motion |
| EP0080007A1 (en) * | 1982-03-15 | 1983-06-01 | Horst Quarz | Machine for extracting wave energy |
| WO1993015315A1 (en) * | 1992-01-28 | 1993-08-05 | Francis Norman Potter | Power generation, preferably by utilisation of wave energy |
| WO1997037122A1 (en) * | 1995-03-02 | 1997-10-09 | A.P. Van Den Berg Beheer B.V. | Sea waves energy converter |
| WO2000017518A1 (en) * | 1998-09-17 | 2000-03-30 | Alexander George Southcombe | Apparatus for harnessing wave energy |
| WO2008020190A3 (en) * | 2006-08-15 | 2008-04-24 | Neptune Energy Ltd | Apparatus for converting wave energy into electricity |
| WO2009096796A3 (en) * | 2008-01-31 | 2010-05-06 | Tenko | Wave energy device |
| US20150192102A1 (en) * | 2011-01-14 | 2015-07-09 | Roderick Charles Tasman Rainey | Wave Energy Machine |
| US9464620B2 (en) * | 2011-01-14 | 2016-10-11 | Checkmate Limited | Wave energy machine |
| WO2024051028A1 (en) * | 2022-09-05 | 2024-03-14 | 莫崇规 | Wave energy inertia hydraulic difference power generation device |
| CN117267037A (en) * | 2023-11-07 | 2023-12-22 | 东方电气(福建)创新研究院有限公司 | A kind of back-curved wave energy power generation hull |
Also Published As
| Publication number | Publication date |
|---|---|
| GB2050522B (en) | 1982-12-22 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PCNP | Patent ceased through non-payment of renewal fee |