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WO1986004646A1 - Installation permettant de commander la force des vagues s'exerçant sur des corps immerges dans un fluide - Google Patents

Installation permettant de commander la force des vagues s'exerçant sur des corps immerges dans un fluide Download PDF

Info

Publication number
WO1986004646A1
WO1986004646A1 PCT/NO1986/000016 NO8600016W WO8604646A1 WO 1986004646 A1 WO1986004646 A1 WO 1986004646A1 NO 8600016 W NO8600016 W NO 8600016W WO 8604646 A1 WO8604646 A1 WO 8604646A1
Authority
WO
WIPO (PCT)
Prior art keywords
fluid
wave
bodies
submerged
pontoons
Prior art date
Application number
PCT/NO1986/000016
Other languages
English (en)
Inventor
Kjell Budal
Original Assignee
Kjell Budal
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 Kjell Budal filed Critical Kjell Budal
Publication of WO1986004646A1 publication Critical patent/WO1986004646A1/fr

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
    • 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

  • This invention relates a method for controlling wave forces on bodies submerged in a fluid and means for carrying out this method.
  • the invention can for instance be applied for reducing heave motions of semi-submersible offshore pens or to increase the energy-absorption of wave energy converters.
  • the object of the present invention is to establish a method and means by which it becomes possible to change the wave forces in a controllable manner.
  • the present invention is based on the unexpected discovery that the wave forces on a submerged cylindrical body is substantially changed if the cylinder is being rotated around the axis of the cylinder.
  • the forces on the body can be made substantially smaller or substantially larger than the wave forces without rotation. In special cases the wave forces can be practically eliminated.
  • the submerged body is preferably rotationally symmetric, as for instance a cylinder which rotates around its axis.
  • FIG. 1-3 shows schematically cross-sections of three different bodies with arrangements in accordance with the invention.
  • Fig. 4 shows schematically a cross-section of a wave energy converter, anchored to the sea floor.
  • Fig. 5 shows schematically a cross-section of a floating wave energy converter, and
  • Fig. 6 shows schematically a cross-section of a semi-submersible offshore platform.
  • Fig. 1 is shown a circular, massive cylinder 11, being suspended or floating in water, with horizontal axis 12.
  • the cylinder 11 is rotated around its axis 12 by a motor (not shown i Fig. 1) as shown by arrows 13.
  • the cylinder 11 is simultanouesly exerted by waves with incidence as shown by 14.
  • the wave force on the body 11 can be made considerably larger or considerably smaller than the wave force without rotation. This can be explained as follows:
  • the rotation of the body 11 sets up a circulation of water around the circumference of the body.
  • the combination of the circulating water and the oscillating water in the waves gives rise to the rotationally induced wave forces.
  • FIG. 2 In fig. 2 is shown an alternative way to establish fluid circulation around a rotating body.
  • the rotating body is shaped like a cylindrical tube 15.
  • narrow slots or vents 17 are made, through which water is pumped , as shown by the arrows 18. in this way a circulation is set up around the cylinder 15.
  • the wave forces on the cylinder can be controlled.
  • Fig. 3 shows a third method to obtain circulation around a cylindrical body 19.
  • propellers 20 and 21, driven by motors, are placed on opposite sides of the body.
  • the propellers 20 and 21 are driven in such a way that circulation of water is efficiently established around the body.
  • the rotational axis or the axis of circulation may have different orientations relative to the direction of incidence of the wave or relative to the vertical direction.
  • the body is completely submerged. By rotating the body is it poss ible to achieve fizid current also for partially submerged bodies. A completely submerged body will however have certain advantages because the wave forces will increase approximately linearly to the wave amplitude.
  • Figs. 1 to 3 show the principle of the invention, only. This principle may for in stance be used to convert wave energy into useful form.
  • FIG. 4 is shown an example of a wave energy converter.
  • a cylinder 22 which can be rotated around an axis, is connected by struts 23 and 24 which extend inclined downward from the cylinder to each side and is connected to a pump elements 25 and 26 respectively.
  • the hydraulic pumps 25 and 26 are convenientlyly connected to the sea bottom. This device corresponds to the so-called Bristol cylinder .
  • a hydraulic motor or turbine (not shown) connected to an electric generator (not shown).
  • the cylinder 22 When, according to the invention, the cylinder 22 is given a proper rotation around its axis, the energy absorption will increase by a factor of at least 2. In the example it is at 27 a pipe for pumping fluid from the pumps 25 and 26 to the shore.
  • Fig. 5 shows an alternative form of a floating wave energy converter. Two parallel cylinders 28 and 29 are forced to rotate in opposite directions. Hydraulic pumps
  • Hydraulic medium can be transferred to the shore through a pipe line 33 for conversion in known manner.
  • the cylinders are suspended in the example in wires
  • the pumps 32 When the distance between the cylinders 28 and 29 changes, the pumps 32 will pump fluid through the pipe 33.
  • the fluid can also be led to a turbine arranged in one of the buoys 35.
  • a platform 36 which is schematically illustrated by a deck 37 and vertical shafts 38 and 39 which are connected to cylindrical pontoons 40 and 41.
  • the pontoons 40,41 are in principle made like the body 15 in Fig. 2 with vents in the cylindrical tube through which water is pumped. The ejected water from the vents in turn establishes a circulation of water around the pontoons, as illustrated by the arrows 42.
  • the wave forces on the pontoons 40,41 and consequently on the platform as a whole can be controlled. In practice it is probably necessary to have several vent systems with automatic control (not shown) due to the constantly changing sea.
  • the present invention can also be used in connection with other offshore constructions where it is desireable to influence the wave forces on the construction.
  • the diameter of the submerged body or the bodies, particularly in wave energy converters is of roughly the same size as the average wave height.

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)
  • Charge And Discharge Circuits For Batteries Or The Like (AREA)

Abstract

Dispositif permettant de modifier la force des vagues agissant sur un corps entièrement ou partiellement immergé dans la mer. Deux corps (28, 29) utilisés dans une installation marémotrice sont connectés avec deux pompes à piston hydraulique (32), les corps étant conçus pour avoir des courants circonférentiels dans des directions différentes. Les corps sont suspendus à des bouées (35).
PCT/NO1986/000016 1985-02-12 1986-02-12 Installation permettant de commander la force des vagues s'exerçant sur des corps immerges dans un fluide WO1986004646A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
NO850512 1985-02-12
NO850512A NO850512L (no) 1985-02-12 1985-02-12 Innretninger for boelgekraftverk.

Publications (1)

Publication Number Publication Date
WO1986004646A1 true WO1986004646A1 (fr) 1986-08-14

Family

ID=19888110

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/NO1986/000016 WO1986004646A1 (fr) 1985-02-12 1986-02-12 Installation permettant de commander la force des vagues s'exerçant sur des corps immerges dans un fluide

Country Status (4)

Country Link
EP (1) EP0215815A1 (fr)
JP (1) JPS62501865A (fr)
NO (1) NO850512L (fr)
WO (1) WO1986004646A1 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2262572A (en) * 1991-12-17 1993-06-23 Retzler Chris Heinz Sea or lake wave energy convertor.
CN100400858C (zh) * 2005-09-01 2008-07-09 李德强 冲击式封闭型波浪能集收机
WO2009018524A3 (fr) * 2007-08-02 2010-04-08 Douglas Joel S Collecteur d'énergie d'écoulement de fluide de force magnus
US9584702B2 (en) 2013-07-11 2017-02-28 Kabushiki Kaisha Toshiba Image processing apparatus for correcting color information and method therefor

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19856625B4 (de) * 1998-12-08 2004-06-03 Metso Minerals (Moers) Gmbh Fördergurt-Tragrollenstation
US7119138B1 (en) 2003-12-19 2006-10-10 Inmat Inc. Barrier coating of a mixture of cured and uncured elastomeric polymers and a dispersed layered filler in a liquid carrier and coated articles
JP2009293608A (ja) * 2008-06-04 2009-12-17 Ikuei Gakuin Salesian Polytechnic 波力発電装置及び波力発電方法
CN108590941B (zh) * 2018-04-20 2020-02-18 大连理工大学 一种利用波浪动水压力收集波浪能的装置

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
USRE18122E (en) * 1931-07-07 Arrangement por exchanging energy between a current and a body therein
US3734641A (en) * 1970-05-29 1973-05-22 Nl Organisatie Handel & Verkee Aerodynamic or hydrodynamic element, such as a wing or a blade

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
USRE18122E (en) * 1931-07-07 Arrangement por exchanging energy between a current and a body therein
US3734641A (en) * 1970-05-29 1973-05-22 Nl Organisatie Handel & Verkee Aerodynamic or hydrodynamic element, such as a wing or a blade

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2262572A (en) * 1991-12-17 1993-06-23 Retzler Chris Heinz Sea or lake wave energy convertor.
GB2262572B (en) * 1991-12-17 1995-01-25 Retzler Chris Heinz Wave energy converter
CN100400858C (zh) * 2005-09-01 2008-07-09 李德强 冲击式封闭型波浪能集收机
WO2009018524A3 (fr) * 2007-08-02 2010-04-08 Douglas Joel S Collecteur d'énergie d'écoulement de fluide de force magnus
US7986054B2 (en) 2007-08-02 2011-07-26 Egen Llc Magnus force fluid flow energy harvester
US9584702B2 (en) 2013-07-11 2017-02-28 Kabushiki Kaisha Toshiba Image processing apparatus for correcting color information and method therefor

Also Published As

Publication number Publication date
JPS62501865A (ja) 1987-07-23
NO850512L (no) 1986-08-13
EP0215815A1 (fr) 1987-04-01

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