GB2119449A - Abstracting energy from water subject to wave motion - Google Patents
Abstracting energy from water subject to wave motion Download PDFInfo
- Publication number
- GB2119449A GB2119449A GB08209690A GB8209690A GB2119449A GB 2119449 A GB2119449 A GB 2119449A GB 08209690 A GB08209690 A GB 08209690A GB 8209690 A GB8209690 A GB 8209690A GB 2119449 A GB2119449 A GB 2119449A
- Authority
- GB
- United Kingdom
- Prior art keywords
- rotor
- water
- wave
- rotation
- wave motion
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
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
- F03B13/1805—Adaptations of machines or engines for special use; Combinations of machines or engines with driving or driven apparatus; Power stations or aggregates characterised by using wave or tide energy using wave energy using the relative movement between a wave-operated member, i.e. a "wom" and another member, i.e. a reaction member or "rem" where the other member, i.e. rem is fixed, at least at one point, with respect to the sea bed or shore and the wom is hinged to the rem
- F03B13/1825—Adaptations of machines or engines for special use; Combinations of machines or engines with driving or driven apparatus; Power stations or aggregates characterised by using wave or tide energy using wave energy using the relative movement between a wave-operated member, i.e. a "wom" and another member, i.e. a reaction member or "rem" where the other member, i.e. rem is fixed, at least at one point, with respect to the sea bed or shore and the wom is hinged to the rem for 360° rotation
- F03B13/183—Adaptations of machines or engines for special use; Combinations of machines or engines with driving or driven apparatus; Power stations or aggregates characterised by using wave or tide energy using wave energy using the relative movement between a wave-operated member, i.e. a "wom" and another member, i.e. a reaction member or "rem" where the other member, i.e. rem is fixed, at least at one point, with respect to the sea bed or shore and the wom is hinged to the rem for 360° rotation of a turbine-like wom
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- 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
- F05B2240/20—Rotors
- F05B2240/201—Rotors using the Magnus-effect
-
- 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
A rotor 15 exhibiting auto- rotation - a rotor that rotates in the same direction irrespective of the direction of a water current acting on it - is located in the surface zone of water subject to wave motion. The currents in the surface zone turn the rotor which is associated with means for deriving output power. The rotor 15 may be of a buoyant construction tethered to the sea-bed to float in the wave-influenced surface zone. In one embodiment, Figs. 4a, 4b (not shown), the rotor drives a hydraulic pump by which the extracted energy is transferred to a remote fixed power conversion station using water-driven turbines. <IMAGE>
Description
SPECIFICATION
Abstracting energy from water subject to wave motion
The invention concerns the abstraction of power from a body of water, such as the sea, which is in wave motion and may be applied in both deep and shallow waters.
It is an observed fact that although the speed of a surface wave motion may be considerable, the actual total movement of water in the direction of wave travel is very small and the kinetic energy content of the water mass rising from such motion is therefore negligible. Most of the kinetic energy is present as a result of the continuous circular motions within the body of water. For instance, a particle of water in the wave surface travels at constant angular speed in a circle having a diameter equal to the amplitude of the wave surface as defined by the vertical distance between the wave crests and troughs. At lower levels, the motion, although still circular, is attenuated by the effects of viscous friction until it becomes vanishingly small approximately one wave length below the mean wave surface.When a wave which has been generated in deep water arrives at a shelving coastal sea bed, the circular motion becomes modified to an elliptical one which may extend to the sea bed.
The amount of energy residing in the body of water below the wave troughs is prodigious. For instance, consider a not untypical wave motion having a frequency of one wave every 5 seconds, and consequent wave length of about 39 metres, as can be calculated from known formulae, and amplitude of 2 metres, which is assumed to be reduced to zero at a depth of only three quarters of a wave length. It can be shown that the kinetic energy of the water below the troughs is about 50 tonne-metres per wave length per metre of wave width. If this could be totally extracted by an energy conservation device in the 5 second period of the wave, the power yield would be 98
Kilowatts. It is to the extraction of a part of this underwater energy that the invention is directed.
The present invention is based on the exploitation of the characteristics of a rotor exhibiting auto-rotation. The phenomenon of autorotation is further discussed below. If such a rotor is located in the surface zone of the water with its axis horizontal, it will be energised by the circular motions induced in the surface water zone so as to rotate in the same direction regardless of the radial direction of the approach to the water. For maximum energisation of the rotor, its axis should be located perpendicular to the direction of wave travel. Additionally for maximum energy extraction the rotor should be located as near the water surface as possible while remaining submerged or substantially so.
Broadly stated the present invention provides apparatus for extracting power from a body of water subject to wave motion, a rotor which exhibits the property of auto-rotation in that it will always rotate in the same direction under the influence of a water current acting on it irrespective of the radial direction of the current with respect to the rotor axis, support means to which the rotor is rotatably mounted for rotation about an essentially horizontal axis at a position adjacent the water surface; and utilisation means coupled to said rotor for deriving output power from the water-induced rotation of the rotor.
A rotor exhibiting auto-rotation (which may here be also referred to as an auto-rotor for brevity) may be realised by a circular cascade of curved vanes attached to suitable end pieces so that the approaching water encounters convex surfaces at one side of the rotor and concave surfaces at the diametrically opposite point. As the concave surfaces offer greater resistance to water flow than the convex ones, the rotor becomes subjected to a turning effect in the appropriate direction. The phenomenon is known an autorotation, and rotors exhibiting this property have found a number of applications in the field of aerodynamics. A well-known example of such a
rotor is the cup anemometer though that, of course, is not intended for extracting any useful amount of energy from the wind.However, as will be shown below, rotors employing the same principle can be designed for high levels of energy extraction contemplated by the present invention.
Such rotors rotate in the same direction whatever the direction of approach of the water and can therefore utilise energy present in the water particles throughout the whole of their circular motions, which is not the case with devices which rely upon the backwards and forwards or upward and downward motions of the water body.
In waters of moderate depth, the rotor may be journalled in stiff frames which are streamlined in the generally direction of water flow and secured to the sea bed. Alternatively, the ends of the rotors may be provided with buoyant chambers both to relieve bearing loads and endow the device with a natural tendency to float, being constrained not to rise past the working level by cables splayed out to suitable anchorages. Control of the working level may be provided by hydraulic jacks or other devices to adjust the cable lengths to accommodate tidal motions. In the event of very violent conditions being encountered, self buoyant rotors of this type may be furnished with means for flooding the flotation chambers to sink the rotor to the sea bed.This latter feature may also be used in yet another type of mounting consisting of a stiff frame hinged to an anchorage on the sea bed, the flotation characteristics being chosen so that although the rotor is completely submerged, the buoyant chambers protrude slightly above the mean water surface. Provided that the natural oscillation period is large in comparison with the wave period, the rotor axis will then remain at approximately the correct working level regardless of tidal movement.
Power absorbed by the rotor from the water may be used to drive hydraulic pumps at one or both ends of the rotor shaft for piping to a remote conversion station. The pumps may be provided with relief valves to limit the load on the rotor blades in the event of the arrival of an unusually violent wave.
The invention will be further described with reference to the accompanying drawings:
Figure 1 shows a cross-section of a wave form and the motion of the water particles therein with a rotor in the continuously totally submerged position;
Figure 2 shows the cross-sections of various rotors (a to d) which may be employed;
Figure 3 depicts various rotor mounting (a to c) which may be employed; and
Figures 4a and 4b show in a sectional part-view and an end view respectively the doupling of a hydraulic pump to a rotor.
In the figures, like parts are denoted by like reference numerals. Figure 1 shows the type of trochoidal wave usually found in large deep oceans, the lines 11 and 12 being the extremes of profile seen by a stationary observer. Although waves which have begun to be generated by wind friction hundreds of kilometres from a shore line may-move at remarkable speed. 100 Kmjhour being not unknown, it is only the wave profile which moves, the total movement of water in the direction of wave travel being remarkably small.
Particles of water in, and below the wavesurface actually move in circles 1 3 of diameter which decreases with depth, the diameter of the circle of movement at the wave surface being equal to the wave amplitude 14. A rotor of generally cylindrical outline is mounted so that it is at all times; completely submerged beneath the lowermost surface of the wave. The axis 1 6 of the- rotor is horizontal and extends perpendicular to the direction of wave travel indicated by arrow 1 7.
The rotor construction and mounting is further described below In deep water wave motion, where the sea bed is more than one wavelength below the mean surface, it is best to mount the rotor so that its direction of rotation is such that its uppermost periphery moves in a direction contrary to that of wave travel as it is then possibie to take better advantage of the circular motion of the water particles because this motion becomes attenuated with increasing depth.
When a deep water wave becomes constricted by a continental shelf or narrowing estuary, its original trochoidal form tends to become modified to a sinusoidal shape, but the motion of the water particles remains circular until very shallow water is reached when the particles move in elliptical paths of horizontal major axis: in this latter case, it will nbt matter which direction of rotation is chosen. When constriction of the type described occurs, the wave period remains the same but the wave length is reduced and its amplitude increases. The energy per wave length remains sensibly constant but it becomes compressed into a smaller volume from which it is the more readily extracted, this indicating the most favourable type of location for the rotor.
It will usually be pointless to use a rotor of diameter greater than the maximum average wave amplitude in which the apparatus is to be used.
This will probably be approximately 2 2 metres, but rotor axial lengths of up to 30 metres are envisaged.
Figure 2 shows cross-sections of various types of rotor which may be used in carrying out the invention. It will be understood the blade or vane profiles shown extend the length of the rotor. All of them have been used in aerodynamic applications. The vane profile of Figure 2a is a particularly simple type using a pair of vanes 20 but is suitable for short lengths only. Figures 2b and 2c show other examples of circular cascades of curved vanes 21 and 22 respectively which would be fixed to supporting discs 23 at intervals along the length of the rotor. In Figure 2b the discs are secured to an axial hub 24 integral with the supporting tube 25 to which the considerable loads are transferred: this tube may also be sealed against the ingress of water so that it also serves, at least in part, as a buoyancy chamber.Additional buoyancy chambers in the form of highly oblate spheriods may also be provided at each end of the rotor. The Figure 2c structure is particularly preferred because the inrushing water does work both on its passage to the interior of the rotor and out again. It may also be further improved by using the kind of vane 26 shown in Figure 2dwhich has greater convexity on the sides of the vanes which are moving adversely to the water current, thus offering less resistance thereto.
Figure 3 shows three different types of mounting which may be used to locate the rotor in its working position. Figure 3a depicts a simple
A-frame 30 to be used at each end of the rotor, being fixed to the sea bed by its own weight and such additional anchorages as may prove necessary. This type is suitable where the tidal movement is small.
Figure 3b shows a method of locating the rotor 1 5 wherein it is secured to the sea bed by means of limp cables or chains 31 attached to anchorages 31 a some distance to the fore or aft (in the direction of wave movement) of the rotor axis. The support means of Figures 3a and 3b may be provided with hydraulic jacks or other known winching device to raise or lower the rotor to allow for tidal movements. In the arrangement of
Figure 3b the support structure includes a buoyancy chamber 32 at each end of the rotor.
Figure 3c shows a mounting for a rotor which would normally float so that the rotor 15 itself is normally completely submerged but with the buoyant chambers 32 at each end of the rotor (or secured to the mounting) slightly above the water surface. The buoyant effect is to be arranged to be sufficient to cause both rotor and its mounting to rise. The mounting is a stiff, elongate, frame 33, one end arm 34 of which is shown at an angle of 300 (on overage) to the horizontal plane and hinged at one end 35 from an anchorage 36 at the sea bed, the rotor being carried at the other end of the arm. The arrangement as a whole will tend to oscillate as a result of purturbations caused by the wave motion and the oscillation period will be a function of the inertia of the whole device and the lifting effect of the buoyant chambers.The period of oscillation is easily arranged to be very long in relation to that of the waves so that its relative position thereto alters but little. This mounting will automatically cope with considerable tidal motion.
Figures 4a and 4b illustrated how the rotation induced in a rotor 1 5 can be used to drive a utilisation device. By way of example the rotor drives an hydraulic pump the hydraulic power delivered by which is deliverable to a remote, fixed power conversion station, for example using water-driven turbines.
The example illustrated shows a rotor 1 5 which is assumed to be supported in the manner illustrated in Figure 3c.
Figure 4b is an end view of the rotor and Figure 4a an axial section through the end illustrated. The rotor is of the kind illustrated in Figures 2c or 2d.
The vanes 22 (26) are secured to an end plate 41 -and there is an axial support tube 25 extending the length of the rotor. The outer surface of the plate 41 is secured to a stub shaft 42 coaxial with rotor 1 5 and coupling the rotor to an hydraulic pump to be described. The shaft 42 extends through an aperture in a boss portion 43a formed at the end of the arms 34 (F.igure 3c) whose outer end portion is referenced 43 in Figures 4a, b. The boss projects towards but terminates short of plate 41 and has an aperture of substantially greater diameter than shaft 42 to provide an annular space about the shaft. This space communicates with a pump inlet opening 43b. A disc 44 is secured spaced from the end plate 41 and is apertured.to surround closely the inwardly directed portion of boss 43a.An annular wire mesh 45 is secured between the peripheral
margin of disc 44 and facing plate 41. Thus as indicated by arrows 46 a water inlet channel is formed between disc 44 and plate 41, extending between the inner end of boss 43a and plate 41 to the space between the shaft 42 and boss 43a, and thence to pump inlet 43b. The mesh 45 is sized to act as a filter for weed or detritus that might block or damage the pump.
The hydraulic pump is contained in a housing 50 that is attached at the end portion 43 of the support arm. Numerous types of pump are known.
A gear pump is illustrated having a pair of meshing gears 47, 48 (Figure 4b) coacting with the closefitting housing to deliver water shown entering the pump by arrows 46 to an outlet conduit 51 through which flow is indicated by arrows 46a.
The gear 47 is connected to stub 42 so as to rotate with rotor 1 5.
The conduit 51 , which will in practice include a flexible portion, or an articulating union coaxial with the anchorage swivel, to accommodate displacements of the rotor in the water, leads the pumped water to the remote power conversion station.
The pump is provided with a spring-loaded pressure relief valve on the outlet side as is diagrammatically illustrated at 52. Figure 4b also shows a variation of the filtered inlet. The outer periphery of disc 44 could be closed with respect to plate 41 by an annular ring and inlet apertures 45a formed in the body of the disc as shown with the filter mesh behind the apertures.
The invention is expected'to find its chief application in waters at the shore lines of large oceans in which very energetic waves begin to be generated at a great distance and the rotors, provided that they are completely submerged, remain unaffected by supe'rimposed wave motions resulting from the action of iocal weather conditions, which can have very destructive effects at the sea surface. In the correct position, the rotors are also not adversely influenced by the massive impact of water from waves which have reached the breaking condition.
The pump which has been described above can have its main parts constructed of materials such as nylon and acetal resin which are resistant to corrosion. An alternative form of pump to that described would be a piston pump, for example comprising three radially disposed cylinders whose pistons are driven from an eccentric on stub shaft 42.
Claims (7)
1. Apparatus for extracting power from a body of water subject to wave motion, a rotor which exhibits the property of.auto-rotation in that it will always rotate in the same direction under the influence of a water current acting on it irrespective-of the radial direction of the current with respect to the rotor axis, support means to which the rotor is rotatably mounted for rotation about an essentially horizontal axis at a position adjacent the water surface; and utilisation means coupled to said rotor for deriving output power from the water-induced rotation of the rotor.
2. Apparatus as claimed Claim 1 in which said support means is a structure secured to the bed of the body of water.
3. Apparatus as claimed in Claim 1 in which said support means includes buoyancy chambers mounted with said rotor and means restraining the buoyant rotor to a predetermined position.
4. Apparatus as claimed in Claim 1 in which said support means comprises an elongate structure pivotally mounted at one end and to the other end of which said rotor is rotatably mounted, means providing buoyancy for the rotor such that the latter floats adjacent the surface with the elongate support structure at an angle to the horizontal.
5. Apparatus as claimed in any preceding claim in which the rotor is supported to be submerged at the trough of a wave in normally expected wave conditions.
6. Apparatus as claimed in any preceding claim in which the rotor is of generally cylindrical form having elongate vanes extending therealong to cause auto-rotation about the axis of the cylinder.
7.- In an installation for extracting power from a bpdy of water subject to wave motion, apparatus as claimed in any preceding claim in which the rotor is positioned to have its axis transverse to the direction of wave motion.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB08209690A GB2119449A (en) | 1982-04-01 | 1982-04-01 | Abstracting energy from water subject to wave motion |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB08209690A GB2119449A (en) | 1982-04-01 | 1982-04-01 | Abstracting energy from water subject to wave motion |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB2119449A true GB2119449A (en) | 1983-11-16 |
Family
ID=10529468
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB08209690A Withdrawn GB2119449A (en) | 1982-04-01 | 1982-04-01 | Abstracting energy from water subject to wave motion |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB2119449A (en) |
Cited By (21)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1999020896A1 (en) * | 1997-10-22 | 1999-04-29 | Lagstroem Goeran | Method and arrangement for converting kinetic energy of ocean currents into rotatory energy |
| WO2001092720A1 (en) * | 2000-06-02 | 2001-12-06 | Hammerfest Ström As | System for the exploitation of tidal- and river current energy |
| US6517009B2 (en) | 1997-12-25 | 2003-02-11 | Gotit Ltd. | Automatic spray dispenser |
| GB2425154A (en) * | 2005-04-12 | 2006-10-18 | Green Cat Renewables Ltd | Wave powered turbine |
| FR2900985A1 (en) * | 2006-05-12 | 2007-11-16 | Rudolf Kalman | Inflatable flexible sub-marine turbine for producing energy from e.g. waves, has balloon compartmentalized with two compartments that are inflated with air and pressurized water, respectively, and another compartment compressing water |
| EP1913204A1 (en) * | 2005-08-12 | 2008-04-23 | Biopower Systems Pty. Ltd. | A wave energy capturing device |
| WO2008065684A1 (en) * | 2006-11-28 | 2008-06-05 | 40South Energy Limited | A completely submerged wave energy converter |
| ES2321904A1 (en) * | 2007-12-11 | 2009-06-12 | Manuel Muñoz Saiz | Capturer of the energy of the waves of the sea (Machine-translation by Google Translate, not legally binding) |
| WO2009074696A1 (en) * | 2007-12-11 | 2009-06-18 | Munoz Saiz Manuel | Sea wave energy collector |
| FR2925129A1 (en) * | 2007-12-18 | 2009-06-19 | Leroux & Lotz Technologies Sa | DEVICE FOR CONVERTING THE ENERGY OF THE WAVES INTO RECUPERATIVE ENERGY |
| ES2325857A1 (en) * | 2008-03-18 | 2009-09-21 | Manuel Muñoz Saiz | Capturer of the energy of the waves of the sea (Machine-translation by Google Translate, not legally binding) |
| EP2140134A1 (en) * | 2007-03-14 | 2010-01-06 | Langlee Wave Power AS | Wave power plant |
| WO2010136100A2 (en) * | 2009-05-26 | 2010-12-02 | Robert Bosch Gmbh | Power converting device for converting wave energy |
| WO2011120630A1 (en) * | 2010-04-01 | 2011-10-06 | Robert Bosch Gmbh | Wave energy installation |
| RU2451824C2 (en) * | 2010-01-11 | 2012-05-27 | Корпорация "Инновация Производство Интеграция" (Корпорация "ИПИ") | Hydraulic power plant |
| ITGE20110020A1 (en) * | 2011-02-25 | 2012-08-26 | Fresco Lorenzo Di | SEASPOON: DEVICE FOR THE ENERGETIC CONVERSION OF THE WAVE MOTO OF THE FREE HAIR OF LIQUIDS. |
| WO2014111800A3 (en) * | 2013-01-17 | 2014-10-30 | Boudewijn Gabriel Van Rompay | Device for generating hydro-electric energy |
| CN104769276A (en) * | 2012-11-14 | 2015-07-08 | 合同会社信天翁科技 | Single bucket drag-type turbine and wave power generator |
| WO2016001725A1 (en) * | 2014-07-04 | 2016-01-07 | Boudewijn Gabriel Van Rompay | Device for generating hydro-electric energy |
| GB2549283A (en) * | 2016-04-11 | 2017-10-18 | David Gaul Roy | Ocean wave kinetic energy conversion method and system |
| GB2625082A (en) * | 2022-12-03 | 2024-06-12 | Desmond Lewis Stephen | Reduced cost tidal and/or water flow power generator |
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| GB1452483A (en) * | 1973-05-31 | 1976-10-13 | Martin Botting Dev Ltd | Turbine unit |
| US4001596A (en) * | 1974-10-03 | 1977-01-04 | Kurtzbein Earl D | Wave and current operated power generating device |
| GB2002458A (en) * | 1977-08-13 | 1979-02-21 | Sandgaenger K | Power station |
| GB1600351A (en) * | 1977-03-29 | 1981-10-14 | Collard L J | Electric energy generator |
| US4296602A (en) * | 1980-01-10 | 1981-10-27 | Hales Marwood J | Apparatus for extracting energy from water waves |
| US4301377A (en) * | 1979-12-03 | 1981-11-17 | Leon Rydz | Moving surface water driven power apparatus |
| GB2081388A (en) * | 1980-08-04 | 1982-02-17 | Szuler Jan | Wave energy turbine |
-
1982
- 1982-04-01 GB GB08209690A patent/GB2119449A/en not_active Withdrawn
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1452483A (en) * | 1973-05-31 | 1976-10-13 | Martin Botting Dev Ltd | Turbine unit |
| US4001596A (en) * | 1974-10-03 | 1977-01-04 | Kurtzbein Earl D | Wave and current operated power generating device |
| GB1600351A (en) * | 1977-03-29 | 1981-10-14 | Collard L J | Electric energy generator |
| GB2002458A (en) * | 1977-08-13 | 1979-02-21 | Sandgaenger K | Power station |
| US4301377A (en) * | 1979-12-03 | 1981-11-17 | Leon Rydz | Moving surface water driven power apparatus |
| US4296602A (en) * | 1980-01-10 | 1981-10-27 | Hales Marwood J | Apparatus for extracting energy from water waves |
| GB2081388A (en) * | 1980-08-04 | 1982-02-17 | Szuler Jan | Wave energy turbine |
Cited By (35)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1999020896A1 (en) * | 1997-10-22 | 1999-04-29 | Lagstroem Goeran | Method and arrangement for converting kinetic energy of ocean currents into rotatory energy |
| US6517009B2 (en) | 1997-12-25 | 2003-02-11 | Gotit Ltd. | Automatic spray dispenser |
| US6540155B1 (en) | 1997-12-25 | 2003-04-01 | Gotit Ltd. | Automatic spray dispenser |
| WO2001092720A1 (en) * | 2000-06-02 | 2001-12-06 | Hammerfest Ström As | System for the exploitation of tidal- and river current energy |
| GB2425154A (en) * | 2005-04-12 | 2006-10-18 | Green Cat Renewables Ltd | Wave powered turbine |
| EP1913204A1 (en) * | 2005-08-12 | 2008-04-23 | Biopower Systems Pty. Ltd. | A wave energy capturing device |
| EP1913204A4 (en) * | 2005-08-12 | 2011-06-08 | Biopower Systems Pty Ltd | A wave energy capturing device |
| FR2900985A1 (en) * | 2006-05-12 | 2007-11-16 | Rudolf Kalman | Inflatable flexible sub-marine turbine for producing energy from e.g. waves, has balloon compartmentalized with two compartments that are inflated with air and pressurized water, respectively, and another compartment compressing water |
| EA014378B1 (en) * | 2006-11-28 | 2010-10-29 | 40 Саус Энерджи Лимитед | A wave energy converter |
| WO2008065684A1 (en) * | 2006-11-28 | 2008-06-05 | 40South Energy Limited | A completely submerged wave energy converter |
| US8581431B2 (en) | 2006-11-28 | 2013-11-12 | 40South Energy Limited | Completely submerged wave energy converter |
| CN101589223B (en) * | 2006-11-28 | 2011-10-05 | 40南方能量有限公司 | A completely submerged wave energy converter |
| EP2140134A4 (en) * | 2007-03-14 | 2013-03-20 | Langlee Wave Power As | Wave power plant |
| EP2140134A1 (en) * | 2007-03-14 | 2010-01-06 | Langlee Wave Power AS | Wave power plant |
| ES2321904A1 (en) * | 2007-12-11 | 2009-06-12 | Manuel Muñoz Saiz | Capturer of the energy of the waves of the sea (Machine-translation by Google Translate, not legally binding) |
| WO2009074696A1 (en) * | 2007-12-11 | 2009-06-18 | Munoz Saiz Manuel | Sea wave energy collector |
| WO2009081042A1 (en) * | 2007-12-18 | 2009-07-02 | Leroux Et Lotz Technologies | Device for converting the energy of waves into recoverable energy |
| FR2925129A1 (en) * | 2007-12-18 | 2009-06-19 | Leroux & Lotz Technologies Sa | DEVICE FOR CONVERTING THE ENERGY OF THE WAVES INTO RECUPERATIVE ENERGY |
| ES2325857A1 (en) * | 2008-03-18 | 2009-09-21 | Manuel Muñoz Saiz | Capturer of the energy of the waves of the sea (Machine-translation by Google Translate, not legally binding) |
| WO2010136100A2 (en) * | 2009-05-26 | 2010-12-02 | Robert Bosch Gmbh | Power converting device for converting wave energy |
| WO2010136100A3 (en) * | 2009-05-26 | 2011-07-07 | Robert Bosch Gmbh | Power converting device for converting wave energy |
| RU2451824C2 (en) * | 2010-01-11 | 2012-05-27 | Корпорация "Инновация Производство Интеграция" (Корпорация "ИПИ") | Hydraulic power plant |
| WO2011120630A1 (en) * | 2010-04-01 | 2011-10-06 | Robert Bosch Gmbh | Wave energy installation |
| ITGE20110020A1 (en) * | 2011-02-25 | 2012-08-26 | Fresco Lorenzo Di | SEASPOON: DEVICE FOR THE ENERGETIC CONVERSION OF THE WAVE MOTO OF THE FREE HAIR OF LIQUIDS. |
| CN104769276A (en) * | 2012-11-14 | 2015-07-08 | 合同会社信天翁科技 | Single bucket drag-type turbine and wave power generator |
| EP2921695A4 (en) * | 2012-11-14 | 2015-12-16 | Albatross Technology LLC | Single bucket drag-type turbine and wave power generator |
| US9816480B2 (en) | 2012-11-14 | 2017-11-14 | Albatross Technology LLC | Single bucket drag-type turbine and wave power generator |
| WO2014111800A3 (en) * | 2013-01-17 | 2014-10-30 | Boudewijn Gabriel Van Rompay | Device for generating hydro-electric energy |
| US9581127B2 (en) | 2013-01-17 | 2017-02-28 | Boudewijn Gabriel VAN ROMPAY | Device for generating hydro-electric energy |
| WO2016001725A1 (en) * | 2014-07-04 | 2016-01-07 | Boudewijn Gabriel Van Rompay | Device for generating hydro-electric energy |
| BE1021097B1 (en) * | 2014-07-04 | 2017-03-23 | VAN ROMPAY BOUDEWIJN GABRIëL | DEVICE FOR GENERATING HYDRO-ELECTRIC ENERGY. |
| US10473084B2 (en) | 2014-07-04 | 2019-11-12 | Boudewijn Gabriel VAN ROMPAY | Device for generating hydro-electric energy |
| GB2549283A (en) * | 2016-04-11 | 2017-10-18 | David Gaul Roy | Ocean wave kinetic energy conversion method and system |
| GB2549283B (en) * | 2016-04-11 | 2018-08-15 | David Gaul Roy | Ocean wave kinetic energy conversion method and system |
| GB2625082A (en) * | 2022-12-03 | 2024-06-12 | Desmond Lewis Stephen | Reduced cost tidal and/or water flow power generator |
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| WAP | Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1) |