EP0052103A1 - Method and device for converting wave energy - Google Patents

Method and device for converting wave energy

Info

Publication number
EP0052103A1
EP0052103A1 EP81900414A EP81900414A EP0052103A1 EP 0052103 A1 EP0052103 A1 EP 0052103A1 EP 81900414 A EP81900414 A EP 81900414A EP 81900414 A EP81900414 A EP 81900414A EP 0052103 A1 EP0052103 A1 EP 0052103A1
Authority
EP
European Patent Office
Prior art keywords
vanes
longitudinal axis
energy
disposed
wave energy
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Withdrawn
Application number
EP81900414A
Other languages
German (de)
French (fr)
Inventor
Fredrik Wincrantz
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Publication of EP0052103A1 publication Critical patent/EP0052103A1/en
Withdrawn legal-status Critical Current

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
    • F03B13/184—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 water-wheel type wom
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00—Energy generation through renewable energy sources
    • Y02E10/30—Energy from the sea, e.g. using wave energy or salinity gradient

Definitions

  • the present invention relates to a method and a device for converting wave energy into a form of energy that can be used in practice, particularly for convert ⁇ ing wave movement into a rotational movement.
  • the object of the invention is achieved by a method of converting wave energy into a form of energy which can be used in practice, with the features which appear from claim 1.
  • the invention also provides a device for converting wave energy into a form of energy which can be used in practice, compris ⁇ ing an elongated, preferably cylindrical body which is provided along the periphery with longitudinal vanes, this device having obtained the features according to claim 3.
  • FIG. 1 is a side view of a device according to the invention, anchored floating on the surface of a sea or lake,
  • FIG. 2 is a side view of part of the device in FIG. 1 .
  • FIG. 3 is an end view of the device in FIG. 1 , FIGS. 2 and 3 being shown on a larger scale.
  • the device for carrying out the method according to the invention is designated generally by reference 1 and is shown floating on the surface of a sea or a lake where waves occur.
  • the device is anchored by means of the bottom footings A and B and ropes a and b connected thereto, with the longitudinal axis sub ⁇ stantially in the surface of the water and at an angle to the prevailing direction of the wave fronts.
  • the mooring forces are small while at the same time the device tends to adjust itself in a favourable working position in relation to the direction of the waves. It may suffice to provide an anchoring device at one end only and not at both ends as shown here.
  • the device 1 comprises a cylindrical body 4 with vanes 2 which extend axially along the body and project therefrom at an angle to the radial direction, the outer portions of the vanes being bent at an angle.
  • the vanes may, however, also be arranged flat and/or curved. They can also be arranged with a pitch along the outer sur ⁇ face ' of the body, which is particularly advantageous if the device according to the invention is intended to work in breaking waves, since a device constructed in this manner permits conversion of some of the "horizontal" kinetic energy of the wave into rotational movement.
  • Partitions 3 are arranged radially and extend peripherally round the body axially spaced. They may,
  • the reaction forces during the rotation of the device can be taken up by a floating platform anchored stationary or by a construction fixed to the bottom.
  • the stator of an electrical generator is then disposed on the platform or the construction fixed to the bottom, while its rotor is connected to the rotating body. It is also possible to connect two bodies adapted to rotate in opposite directions. In such a case, the stator of the generator is connected to the one body and its rotor to the other body.
  • Holes 5 may be provided in the vanes 2, as shown in FIG. 3, through which air can .pass in under the vanes at the side 2a when the device moves upwards. As a result of the fact that air passes in through the vanes, these release more easily the water which is present at the ' bottom side of the vanes. Otherwise, this water can exert a braking force on the rotating device. Water, however, does not pass through the holes 5 as easily as air and in this manner the openings act as non-return valves. Nevertheless, the openings 5 may also be provided with valve bodies which are open in the upward-moving part of the device but which close when they come into the downward-moving part 2b, FIG. 3, of the device. These valve bodies may consist of some form of flap.
  • the device according to the present invention thus consists of a simple movable body to which an electric generator, for example, can be connected directly or through a simple transmission.
  • the device can be given an uncomplicated shape, which provides a simple and sturdy construction with great stiffness, suitable for the manufacture of large series from cheap material .
  • the device according to the invention can also be de- signed so that it can stand up to storms and even is able to take up energy from storm waves.
  • the device can be mounted in a construction fixed to the bottom with the longitudinal axis of the body . substanti al ly in the surface of the water.
  • the body does not necess ⁇ arily have to be a floating body. Nor does it need to be a body of revolution but may have a polygonal shape

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

Procede et dispositif de conversion d'energie en une forme d'energie pouvant etre utilisee en pratique. Le dispositif comprend un corps allonge (4) qui est pourvu le long de sa peripherie d'aubes longitudinales (2), disposees angulairement par rapport a la direction radiale, au moins sur leurs parties externes. Les aubes definissent des chambres qui sont delimitees axialement par des parois (3) le long de la peripherie du corps, lesquelles parois sont disposees angulairement par rapport aux aubes. Les aubes permettent une plus grande capacite de deplacement d'un cote de l'axe longitudinal du corps que de l'autre cote de sorte que le corps est force de tourner par les mouvements des vagues lorsqu'il est ancre, l'axe longitudinal se trouvant sensiblement a la surface de l'eau.Method and device for converting energy into a form of energy which can be used in practice. The device comprises an elongate body (4) which is provided along its periphery with longitudinal blades (2), arranged angularly with respect to the radial direction, at least on their external parts. The blades define chambers which are axially delimited by walls (3) along the periphery of the body, which walls are arranged angularly with respect to the blades. The blades allow a greater displacement capacity on one side of the longitudinal axis of the body than on the other side so that the body is forced to rotate by the movements of the waves when it is anchored, the longitudinal axis found substantially on the surface of the water.

Description

METHOD AND DEVICE FOR CONVERTING WAVE ENERGY
The present invention relates to a method and a device for converting wave energy into a form of energy that can be used in practice, particularly for convert¬ ing wave movement into a rotational movement.
Man has long tried to make use of the energy which is found in waves on seas and lakes and in doing so has most often tried to utilize floating bodies which are firmly anchored to the bottom of the sea or lake, or floating bodies, the mass inertia of which is utilized to convert the wave energy into another form of energy which can be used. However, the majority of attempts which have hitherto been made to convert wave energy into a form of energy 'which can be used have involved several disadvantages: the constructions have been complicated and expensive, and the possibility of effectively converting the wave energy has been li ited. The object of the invention is to render possible the effective conversion of the wave energy into another form of energy by means of a device which is of extremely simple and robust construction.
The object of the invention is achieved by a method of converting wave energy into a form of energy which can be used in practice, with the features which appear from claim 1.
In-order to carry out this method, the invention also provides a device for converting wave energy into a form of energy which can be used in practice, compris¬ ing an elongated, preferably cylindrical body which is provided along the periphery with longitudinal vanes, this device having obtained the features according to claim 3. The invention will be explained in more detail with reference to an illustrative embodiment which is shown on the accompanying drawing in which
FIG. 1 is a side view of a device according to the invention, anchored floating on the surface of a sea or lake,
FIG. 2 is a side view of part of the device in FIG. 1 , and
FIG. 3 is an end view of the device in FIG. 1 , FIGS. 2 and 3 being shown on a larger scale. In FIG. 1 the device for carrying out the method according to the invention is designated generally by reference 1 and is shown floating on the surface of a sea or a lake where waves occur. The device is anchored by means of the bottom footings A and B and ropes a and b connected thereto, with the longitudinal axis sub¬ stantially in the surface of the water and at an angle to the prevailing direction of the wave fronts. As a result, the mooring forces are small while at the same time the device tends to adjust itself in a favourable working position in relation to the direction of the waves. It may suffice to provide an anchoring device at one end only and not at both ends as shown here.
The device 1 comprises a cylindrical body 4 with vanes 2 which extend axially along the body and project therefrom at an angle to the radial direction, the outer portions of the vanes being bent at an angle. The vanes may, however, also be arranged flat and/or curved. They can also be arranged with a pitch along the outer sur¬ face' of the body, which is particularly advantageous if the device according to the invention is intended to work in breaking waves, since a device constructed in this manner permits conversion of some of the "horizontal" kinetic energy of the wave into rotational movement. Partitions 3 are arranged radially and extend peripherally round the body axially spaced. They may,
OMPI . W WIIPPΌO
in the speed of rotation.
The reaction forces during the rotation of the device can be taken up by a floating platform anchored stationary or by a construction fixed to the bottom. The stator of an electrical generator is then disposed on the platform or the construction fixed to the bottom, while its rotor is connected to the rotating body. It is also possible to connect two bodies adapted to rotate in opposite directions. In such a case, the stator of the generator is connected to the one body and its rotor to the other body.
Holes 5 may be provided in the vanes 2, as shown in FIG. 3, through which air can .pass in under the vanes at the side 2a when the device moves upwards. As a result of the fact that air passes in through the vanes, these release more easily the water which is present at the' bottom side of the vanes. Otherwise, this water can exert a braking force on the rotating device. Water, however, does not pass through the holes 5 as easily as air and in this manner the openings act as non-return valves. Nevertheless, the openings 5 may also be provided with valve bodies which are open in the upward-moving part of the device but which close when they come into the downward-moving part 2b, FIG. 3, of the device. These valve bodies may consist of some form of flap.
The device according to the present invention thus consists of a simple movable body to which an electric generator, for example, can be connected directly or through a simple transmission. The device can be given an uncomplicated shape, which provides a simple and sturdy construction with great stiffness, suitable for the manufacture of large series from cheap material . The device according to the invention can also be de- signed so that it can stand up to storms and even is able to take up energy from storm waves.
It may be added that the device can be mounted in a construction fixed to the bottom with the longitudinal axis of the body . substanti al ly in the surface of the water. Thus, the body does not necess¬ arily have to be a floating body. Nor does it need to be a body of revolution but may have a polygonal shape

Claims

1. A method of converting wave energy into a form of energy which can be used in practice, c h a r a c ¬ t e r i z e d in that an elongated body with longi¬ tudinal vanes which afford a greater displacing capacity at one side of the longitudinal axis of the body than at the other side, is anchored in the water with the longitudinal axis substantially in the surface of the water (FIG. 1).
2. A method as claimed in claim 1 , c h a r a c - t e r i z e d in that the body is disposed with its longitudinal axis at angles to the prevailing direction of the wave fronts.
3. A device for converting wave energy into a form of energy which can be used in practice by carrying out the method as claimed in claim 1 , comprising an elongated, preferably cylindrical body (4) which is provided along the periphery with longitudinal vanes (2), c h a r a c t e r i z e d in that the vanes (2) are disposed at angles to the radial direction, at least in their outer portions, to define chambers between the vanes with a greater displacing capacity at one side of the longitudinal axis of the body than at the other side of the longitudinal axis and that these chambers are bounded axially by walls (3) along the periphery of the body, which are disposed at angles to the vanes.
4. A device as claimed in claim 3, c h a r a c ¬ t e r z e d in that the vanes are disposed with a pitch along the outer surface of the body (4).
5. A device as claimed in claim 3 or 4, c h a r a c t e r i z e d in that the body (4) is adapted as a floating body.
6. A device as claimed in one of the claims 3 to 5, c h a r a c t e r i z e d in that the length of the device (1) exceeds the length of the waves.
7. A device as claimed in one of the claims 3 to 6, c h a r a c t e r i z e d in that air openings (5) are provided in the vanes (2).
8. A device as claimed in claim 7, c h a r a c ■ t e r i z e d in that the air openings are provided with non-return valves adapted to open in the upward- - oving part of the body to admit air under the blades
___ OMPf
EP81900414A 1980-02-13 1981-02-13 Method and device for converting wave energy Withdrawn EP0052103A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE8001125 1980-02-13
SE8001125 1980-02-13

Publications (1)

Publication Number Publication Date
EP0052103A1 true EP0052103A1 (en) 1982-05-26

Family

ID=20340240

Family Applications (1)

Application Number Title Priority Date Filing Date
EP81900414A Withdrawn EP0052103A1 (en) 1980-02-13 1981-02-13 Method and device for converting wave energy

Country Status (5)

Country Link
EP (1) EP0052103A1 (en)
JP (1) JPS57500202A (en)
DK (1) DK452981A (en)
NO (1) NO813441L (en)
WO (1) WO1981002329A1 (en)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ATE32774T1 (en) * 1983-09-07 1988-03-15 Marino Sbrizzai HYDRAULIC DEVICE.
UA62659A (en) * 2003-04-23 2003-12-15 Artem Valeriovych Madatov Unit for transforming the waves on the water surface energy into mechanical energy
GB2435494A (en) * 2005-12-13 2007-08-29 David Adrian Floating marine current mill
WO2008053293A2 (en) * 2006-11-03 2008-05-08 Artem Valeriyovich Madatov Device for converting sea wave energy into mechanical power
WO2009097855A2 (en) * 2008-02-06 2009-08-13 Oxydice A/S A device for converting wave energy into mechanical energy
EP2282049A1 (en) * 2009-07-31 2011-02-09 Padraig Molloy Rotating wave energy capture system and method
CN102536612B (en) * 2012-02-29 2014-05-07 吕伟雄 Load-mode seawave power generation device

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1014196A (en) * 1961-11-24 1965-12-22 Ryokuseisha Kk Buoy devices for utilising wave energy
DE2446980A1 (en) * 1974-10-02 1976-04-15 Weineck Albert Hans Joachim Water wheel for electric power generation - has impeller in longitudinal sections suspended to float in stream
JPS5840033B2 (en) * 1975-08-22 1983-09-02 エンカク オサム Hallow Energy Niyori Kaitensuru Suishiya Sochi
DE2555663A1 (en) * 1975-12-11 1977-06-30 Georg Weiss Energy generator for land cultivation and stream clearance - has liftable float:supported paddle wheels in stream for electricity generation
DE2730735A1 (en) * 1977-07-07 1979-01-25 Hermann Schaefer Hydraulic power unit anchored in river - has three or more laterally interconnected pontoons with paddle wheels driving generating equipment
DE2743201A1 (en) * 1977-09-26 1979-05-03 Willi Blask Water wheel system for generating electrical energy - utilises energy of incoming sea waves by drum shaped water wheel
US4224793A (en) * 1979-07-09 1980-09-30 Gutsfeld Anton F Stream-powered turbine vanes

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO8102329A1 *

Also Published As

Publication number Publication date
NO813441L (en) 1981-10-13
WO1981002329A1 (en) 1981-08-20
DK452981A (en) 1981-10-13
JPS57500202A (en) 1982-02-04

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