WO2003066971A1 - Wave energy power plant - Google Patents

Wave energy power plant Download PDF

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Publication number
WO2003066971A1
WO2003066971A1 PCT/AU2003/000098 AU0300098W WO03066971A1 WO 2003066971 A1 WO2003066971 A1 WO 2003066971A1 AU 0300098 W AU0300098 W AU 0300098W WO 03066971 A1 WO03066971 A1 WO 03066971A1
Authority
WO
WIPO (PCT)
Prior art keywords
power plant
turbine
floating power
plant according
piston
Prior art date
Application number
PCT/AU2003/000098
Other languages
French (fr)
Other versions
WO2003066971B1 (en
Inventor
Ken Gylden Holm Nielsen
Original Assignee
Ken Gylden Holm Nielsen
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 Ken Gylden Holm Nielsen filed Critical Ken Gylden Holm Nielsen
Priority to AU2003201542A priority Critical patent/AU2003201542A1/en
Publication of WO2003066971A1 publication Critical patent/WO2003066971A1/en
Publication of WO2003066971B1 publication Critical patent/WO2003066971B1/en

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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
    • F03B13/1845—Adaptations of machines or engines for special use; Combinations of machines or engines with driving or driven apparatus; Power stations or aggregates characterised by using wave or tide energy using wave energy using the relative movement between a wave-operated member, i.e. a "wom" and another member, i.e. a reaction member or "rem" where the other member, i.e. rem is fixed, at least at one point, with respect to the sea bed or shore and the wom slides relative to the rem
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02B—HYDRAULIC ENGINEERING
    • E02B9/00—Water-power plants; Layout, construction or equipment, methods of, or apparatus for, making same
    • E02B9/08—Tide or wave power plants
    • 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 has been specifically devised in order to provide power plants in the range of a few hundred kilowatt to several gigawatt producing extraordinarily cheap, renewable and non-polluting electricity supply from stored potential and kinetic energy in ocean waves.
  • a floating power plant in accordance with this invention comprises a flotation cylinder shaft with a turbine affixed, in which a piston arrangement, connected on either side of said turbine, can be kept near stationary, allowing up and down movement of the flotation cylinder shaft to force alternating fluid flows through the turbine.
  • the floating power plant utilizes alternating high and low pressure between the flotation chambers in the top and a large area dampening pressure plate below, by way of inducing a vertically oscillating fluid column in a cylindrical shaft.
  • the fluid column is passing through a fixed turbine with conical inlet sections on both sides of the turbine.
  • the large pressure plate is connected to two piston sections in arrangement on either side of the oscillating fluid column.
  • the top piston section forces the fluid down through the turbine when the distance between flotation chambers and the dampening pressure plate increases in a rising ocean wave. As the wave recedes from the crest the lower piston section forces the fluid back up through the turbine, when the distance between flotation chambers and the dampening pressure plate decreases.
  • the turbine can be of several designs, all of which have the common characteristic, that turbine and generator, to which the turbine torque is transferred via a gearbox, keep turning in the same direction as the fluid column is forced up and down through the turbine.
  • the output from the generator can be fed into a local power grid or used onboard the floating power plant for some other purpose.
  • the floating power plant uses hydraulic jets controlled by computer from readings of the Global Positioning System.
  • the alignment of the vertical axis is protected by gyroscope controlled hydraulic jets.
  • the power plant can be equipped with additional flotation capacity and it can be connected to additional pressure plate(s) deeper in the ocean. Different plate shapes can be employed to suit local conditions at site of commission.
  • An impervious plate is preferable in smaller waves of about 2m height to keep the drag coefficient high. In middle range waves of about 4-5m height a pervious plate design is preferable where a turbulent flow through the plate can be helpful in keeping the drag force at a desirable level.
  • the preferred plate design incorporates turbines in the design, thereby harnessing energy from the otherwise turbulent flow in and around the plate. These turbines will preferably be pumping fluid into the high-pressure system. In treacherous waters, however, a high axial inertia is preferable to add stability to the power plant.
  • the pressure plate may be unhelpful to marine life. It can be substituted for buoyancy in the piston arrangement, combined with a taut mooring of it. The upward reaction force will be supplied by piston buoyancy and the downward reaction force will be taken up by the taut mooring.
  • Fig. 1 is a diametrical sectional elevation of a floating power plant unit showing the co-acting moving parts
  • Fig. 2 is an elevation of a floating power plant unit commissioned in shallow water.
  • the floating power plant unit shown is an ocean(l ⁇ ) placed flotation cylinder shaft(l) having a turbine and inlet cones section(2) affixed so as to let a fluid column(3) move up and down through the turbine(2).
  • the fluid column(3) is forcefully driven through the turbine(2) by two piston sections(4 & 5) connected by piston rods(6).
  • the piston sections(4 & 5) are kept near stationary by the pressure plate(7) and alternately compresses the fluid(3) against either side of the turbine(2) as the floatation cylinder shaft(l) moves up and down with the changing ocean wave surface(S) through buoyancy of the flotation chambers(ll). Suspension(9) helps pull the turbine(2) in the downward direction.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Other Liquid Machine Or Engine Such As Wave Power Use (AREA)

Abstract

The disclosed floating power plant is an ocean (10) placed flotation cylinder shaft (1) having a turbine and inlet cones section (2) affixed so as to let a fluid column (3) move up and down through the turbine (2). The fluid column (3) is forcefully driven through the turbine (2) by two piston sections (4 & 5) connected by piston rods (6). The piston sections (4 & 5) are kept near stationary by the pressure plate (7) and alternately compresses the fluid (3) against either side of the turbine (2) as the floatation cylinder shaft (1) moves up and down with the changing ocean wave surface (8) through buoyancy of the flotation chambers (11). Suspension (9) helps pull the turbine (2) in the downward direction. During high-pressure compression fluid (3) is bled off to a high-pressure hydraulic system (16). Low-pressure fluid is returned again during the low-pressure cycle (17). The upper piston section (4) is open to the vent (12) and can be vented to the open air. Rotation of the turbine (2) is transferred through the axle (13) to the gearbox and generator room (14). The power plant is kept in position by hydraulic control jets (15).

Description

Wave Energy Power Plant
For many years cheap energy has come from polluting and non-renewable sources.
This invention has been specifically devised in order to provide power plants in the range of a few hundred kilowatt to several gigawatt producing extraordinarily cheap, renewable and non-polluting electricity supply from stored potential and kinetic energy in ocean waves.
A floating power plant in accordance with this invention comprises a flotation cylinder shaft with a turbine affixed, in which a piston arrangement, connected on either side of said turbine, can be kept near stationary, allowing up and down movement of the flotation cylinder shaft to force alternating fluid flows through the turbine.
The floating power plant utilizes alternating high and low pressure between the flotation chambers in the top and a large area dampening pressure plate below, by way of inducing a vertically oscillating fluid column in a cylindrical shaft. The fluid column is passing through a fixed turbine with conical inlet sections on both sides of the turbine.
The large pressure plate is connected to two piston sections in arrangement on either side of the oscillating fluid column. The top piston section forces the fluid down through the turbine when the distance between flotation chambers and the dampening pressure plate increases in a rising ocean wave. As the wave recedes from the crest the lower piston section forces the fluid back up through the turbine, when the distance between flotation chambers and the dampening pressure plate decreases.
During times of heavy push or pull between the flotation cylinder shaft and the pressure plate there will be pressure spikes in the compression chambers on either side of the turbine. Fluid is bled off from the compression chambers to a high- pressure hydraulic system at the occurrence of said pressure spikes. Any excess high hydraulic pressure may be used to even out the generator torque by way of passing high-pressure fluid through a positive displacement pump. This pump can be placed on the turbine axle between the turbine and the gearbox. The piston section may, or may not, be subject to undampened downward energy storing suspension, lowering the required compression force onto the pressure plate during the reverse cycle.
The turbine can be of several designs, all of which have the common characteristic, that turbine and generator, to which the turbine torque is transferred via a gearbox, keep turning in the same direction as the fluid column is forced up and down through the turbine.
The output from the generator can be fed into a local power grid or used onboard the floating power plant for some other purpose.
It is chosen, in this invention, to let the piston sections be stationary and have the turbine move up and down with the flotation cylinder shaft, so as to keep the distance between gearbox and turbine fixed. This allows the axial thrust bearings to be located in a position fixed to the flotation cylinder shaft. In the floating power plant, variables such as the length and diameter of the fluid column, the area and shape of the pressure plate, the size of the turbine and the degree of energy stored piston suspension are all included in calibration of the oscillation cycle to limit negative interference due to phase shift departure from the ocean wave. A given flotation class is fitted for local ocean wave conditions where the power plant is to be positioned.
To stay in position the floating power plant uses hydraulic jets controlled by computer from readings of the Global Positioning System. The alignment of the vertical axis is protected by gyroscope controlled hydraulic jets. The power plant can be equipped with additional flotation capacity and it can be connected to additional pressure plate(s) deeper in the ocean. Different plate shapes can be employed to suit local conditions at site of commission. An impervious plate is preferable in smaller waves of about 2m height to keep the drag coefficient high. In middle range waves of about 4-5m height a pervious plate design is preferable where a turbulent flow through the plate can be helpful in keeping the drag force at a desirable level. In high waves in excess of about 6m height the preferred plate design incorporates turbines in the design, thereby harnessing energy from the otherwise turbulent flow in and around the plate. These turbines will preferably be pumping fluid into the high-pressure system. In treacherous waters, however, a high axial inertia is preferable to add stability to the power plant.
In shallow water commissioning the pressure plate may be unhelpful to marine life. It can be substituted for buoyancy in the piston arrangement, combined with a taut mooring of it. The upward reaction force will be supplied by piston buoyancy and the downward reaction force will be taken up by the taut mooring. The invention may be better understood with reference to the illustrations of embodiments of the invention in which:
Fig. 1 is a diametrical sectional elevation of a floating power plant unit showing the co-acting moving parts and
Fig. 2 is an elevation of a floating power plant unit commissioned in shallow water.
The floating power plant unit shown is an ocean(lθ) placed flotation cylinder shaft(l) having a turbine and inlet cones section(2) affixed so as to let a fluid column(3) move up and down through the turbine(2). The fluid column(3) is forcefully driven through the turbine(2) by two piston sections(4 & 5) connected by piston rods(6). The piston sections(4 & 5) are kept near stationary by the pressure plate(7) and alternately compresses the fluid(3) against either side of the turbine(2) as the floatation cylinder shaft(l) moves up and down with the changing ocean wave surface(S) through buoyancy of the flotation chambers(ll). Suspension(9) helps pull the turbine(2) in the downward direction. During the cycle of high compression fluid(3) is bled off to a high-pressure hydraulic system(16). Low-pressure fluid is returned again during the low pressure cycle(17). The upper piston section(4) is open to the vent(12) and can be vented to the open air. Rotation of the turbine(2) is transferred through the axle(13) to the gearbox and generator room(14). The torque generated in the turbine(2) is led to a generator(18) through a gearbox(19). Electricity is fed to local power grid(20) once it is fine-tuned in the control apparatus(21). The power plant is kept in position by hydraulic control jets(15). For floating power plants commissioned in shallow water the piston section(5) is extended to provide buoyancy above the own weight of the plant and the pressure plate(7) is substituted by a taut mooring(22).

Claims

The claims defining the invention are as follows:
1 A floating power plant comprising a flotation cylinder shaft with a turbine affixed in which two piston sections, connected on either side of said turbine, can be kept near stationary, allowing up and down movement in the flotation shaft to force alternating fluid flows through the turbine.
2 A floating power plant according to claim 1 wherein the piston arrangement is kept dampened in near stationary position by a suspended pressure plate or by a large buoyancy incorporated in the piston arrangement that may be combined with or without a taut mooring of said piston arrangement.
3 A floating power plant according to any one of claims 1 and 2 wherein the high pressure spikes occurring in the compression zones between the turbine and the piston arrangement are bled off to a hydraulic pressure system.
4 A floating power plant according to any one of claims 1-3 wherein the suspended pressure plate is of impervious construction.
5 A floating power plant according to any one of claims 1-3 wherein the suspended pressure plate is of pervious construction.
6 A floating power plant according to any one of claims 1-5 wherein the suspended pressure plate incorporates turbines producing high fluid pressure or turbines producing high axial inertia
7 A floating power plant according to any one of claims 1-6 wherein the commissioned position is maintained by activating hydraulic jets as per correction requirement determined by readings of the GPS, Global Positioning System.
8 A floating power plant according to any one of claims 1-7 wherein the vertical axis is maintained by activating hydraulic jets as per correction requirement determined by gyroscope.
9 A floating power plant according to any one of claims 1-8 wherein the downward movement of the flotation shaft is assisted by springs attached to the near stationary lower section.
10 A floating power plant according to any one of claims 1-9 wherein the piston and turbine interaction is exchanged for linear electromagnetic generators operating with or without reactive fields.
11 A floating power plant substantially as herein before described with reference to Fig. 1 and 2 of the accompanying drawings.
Ken Gylden Holm Nielsen
PCT/AU2003/000098 2002-02-04 2003-02-03 Wave energy power plant WO2003066971A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU2003201542A AU2003201542A1 (en) 2002-02-04 2003-02-03 Wave energy power plant

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AUPS0281A AUPS028102A0 (en) 2002-02-04 2002-02-04 Golden holm power plant
AUPS0281 2002-02-04

Publications (2)

Publication Number Publication Date
WO2003066971A1 true WO2003066971A1 (en) 2003-08-14
WO2003066971B1 WO2003066971B1 (en) 2004-03-04

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Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/AU2003/000098 WO2003066971A1 (en) 2002-02-04 2003-02-03 Wave energy power plant

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AU (1) AUPS028102A0 (en)
WO (1) WO2003066971A1 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2008006145A1 (en) * 2006-07-11 2008-01-17 Australian Sustainable Energy Corporation Pty Ltd Wave energy converter
WO2008052286A1 (en) * 2006-11-03 2008-05-08 Reh Intellectual Property Limited Bouyant actuator
CN113898521A (en) * 2021-09-22 2022-01-07 鲁东大学 Offshore floating platform stand damping heave plate and wave energy collection device

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SU1668716A1 (en) * 1989-04-18 1991-08-07 Г.Н.Крамарев Wave power unit
EP0265594B1 (en) * 1986-10-10 1992-04-01 Tom J. Windle Float type wave energy extraction apparatus and method
WO1995017555A1 (en) * 1993-12-21 1995-06-29 Teamwork Techniek B.V. I.O. Wave energy transformer

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0265594B1 (en) * 1986-10-10 1992-04-01 Tom J. Windle Float type wave energy extraction apparatus and method
SU1668716A1 (en) * 1989-04-18 1991-08-07 Г.Н.Крамарев Wave power unit
WO1995017555A1 (en) * 1993-12-21 1995-06-29 Teamwork Techniek B.V. I.O. Wave energy transformer

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2008006145A1 (en) * 2006-07-11 2008-01-17 Australian Sustainable Energy Corporation Pty Ltd Wave energy converter
AU2011202488B2 (en) * 2006-07-11 2011-09-01 Protean Energy Australia Pty Ltd Apparatus for Converting Wave Energy
CN102345281A (en) * 2006-07-11 2012-02-08 多样能源澳大利亚有限公司 Floating member of wave energy converter
US8264093B2 (en) 2006-07-11 2012-09-11 Protean Energy Australia Pty Ltd Wave energy converter
KR101521882B1 (en) 2006-07-11 2015-05-20 오스트렐리언 서스테인너블 에너지 코포레이션 피티와이 엘티디 Tention mooring system
WO2008052286A1 (en) * 2006-11-03 2008-05-08 Reh Intellectual Property Limited Bouyant actuator
CN113898521A (en) * 2021-09-22 2022-01-07 鲁东大学 Offshore floating platform stand damping heave plate and wave energy collection device
CN113898521B (en) * 2021-09-22 2024-03-08 鲁东大学 Marine floating platform stand damping heave plate and wave energy collection device

Also Published As

Publication number Publication date
WO2003066971B1 (en) 2004-03-04
AUPS028102A0 (en) 2002-02-28

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