DK178143B1 - System for pumping a fluid in response to natural wave action on a body of water - Google Patents

System for pumping a fluid in response to natural wave action on a body of water Download PDF

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Publication number
DK178143B1
DK178143B1 DK201470168A DKPA201470168A DK178143B1 DK 178143 B1 DK178143 B1 DK 178143B1 DK 201470168 A DK201470168 A DK 201470168A DK PA201470168 A DKPA201470168 A DK PA201470168A DK 178143 B1 DK178143 B1 DK 178143B1
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DK
Denmark
Prior art keywords
gas pressure
hydraulic accumulator
controlled hydraulic
space
fluid
Prior art date
Application number
DK201470168A
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Danish (da)
Inventor
Frank Aavard
Original Assignee
Faatek Aps
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Publication date
Application filed by Faatek Aps filed Critical Faatek Aps
Priority to DK201470168A priority Critical patent/DK178143B1/en
Priority to PCT/DK2015/000011 priority patent/WO2015149806A1/en
Application granted granted Critical
Publication of DK178143B1 publication Critical patent/DK178143B1/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"
    • 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
    • F03B13/1885—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 tied to the rem
    • F03B13/189—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 tied to the rem acting directly on the piston of a pump
    • 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
    • F05B2260/00—Function
    • F05B2260/40—Transmission of power
    • F05B2260/406—Transmission of power through hydraulic systems
    • 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

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  • 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

The present invention relates to hydraulic wave energy converters comprising a gas controlled hydraulic accumulator assembly, enabling a stepless power regulation of the hydraulically driven power generator with a relatively small power loss.

Description

System for pumping a fluid in response to natural wave action on a body of water
Technical field of the invention
The present invention relates to hydraulic wave energy converters.
Background of the invention
Due to the environmental and financial costs of conventional fossil fuel or nuclear energy generation methods, many attempts have been made to harness waves to generate energy in a useable form, primarily as electricity. In the case of wave energy generation, many devices have been proposed which utilize a float which rides up and down with wave motion and a fixed or anchored member which remains relatively stationary. An air compression cylinder is introduced between the float and the anchored member, together with associated intake and output conduits and check valves in order to produce compressed air as the float rises and falls with the wave action. Variations to such conventional devices have been made to pressurize liquids or pump water to fill a water reservoir on shore. The pressurized fluid, air or water is then used to drive a conventional turbine and electric generator to convert the energy stored in the pressurized fluid into electrical energy.
Conventional single unit devices and multiple arrays of units conventionally connected in parallel suffer from the disadvantage that a minimum amplitude of wave must be encountered before the pressure in the cylinder reaches a level at which useable pressurized fluid is generated.
As a result, waves having an amplitude below such a minimum do not generate any energy. The minimum amplitude is determined by the design of the air compressing cylinder, and this disadvantage is present in both single unit devices and multiple unit parallel arrays of the conventional methods and devices.
WO2012127234 discloses a wave power capture system characterised in comprising a double acting piston arrangement coupled to and driven from a reciprocating source of wave energy. Each output of the double acting piston arrangement is connected to a common hydraulic supply and to a hydraulic motor.
It is therefore desirable to provide a device which can capture energy from a wide range of wave amplitudes.
It is also desirable that such a device produce compressed gas or pressurized liquid in sufficient volume, and at a high enough pressure, to make the device economically viable.
Summary of the invention
Disclosed herein is a system for pumping a fluid in response to natural wave action on a body of water, such as an ocean. The system comprises a hydraulic flotation device comprising a buoyant actuator and a pump assembly. During use, the buoyant actuator is at least partially immersed in the body of water, and rises and falls with the rise and fall of the wave motion. The buoyant actuator is coupled to a pump assembly such that the motion of the actuator is transferred into pump motion, and thereby, the fluid in the system is pump around the system, from the pump assembly towards the other units in the system.
The system also comprises a reservoir, such as a tank, for receiving and storing fluid, and being in fluid communication with the pump assembly. Generally, the different units being in fluid communication is through conduits, such as pipes or hoses.
The system further comprises a gas controlled hydraulic accumulator assembly. The gas controlled hydraulic accumulator assembly, comprises a housing that forms a chamber, and a displaceable separation wall disposed within the chamber. The displaceable separation wall may e.g. be a piston or a balloon. The displaceable separation wall separates the chamber in a first space and a second space. The first space is in fluid communication with the pump assembly, and the second space is in communication with means for altering the gas pressure within the second space of the gas controlled hydraulic accumulator assembly.
The means for altering the gas pressure within the second space of the gas controlled hydraulic accumulator assembly may be a gas compressor to increase the gas pressure within the second space of the gas controlled hydraulic accumulator assembly; and may include a gas reservoir (e.g. a tank). A one-way valve may be inserted between the gas compressor and the gas controlled hydraulic accumulator assembly. A motorized valve may be inserted between the gas compressor and the gas controlled hydraulic accumulator assembly to decrease the gas pressure within the second space of the gas controlled hydraulic accumulator assembly.
The system also comprises a hydraulically driven power generator adapted to receive the fluid pumped through the conduits and units in the system to generate electrical power. The hydraulically driven power generator is in fluid communication with the first space of the air controlled hydraulic accumulator assembly.
The system further comprises a controller for controlling the gas pressure within the second space of the gas controlled hydraulic accumulator assembly in response to input data. In one or more embodiments, the controller, is adapted to regulate the fluid level in the first space of the gas controlled hydraulic accumulator assembly in response to input data. These level regulations are necessary to control in order to obtain a specific/chosen power (kW) of the hydraulically driven power generator no matter how the waves are acting on a body of water in which the system is situated.
By having a system according to the above, it is ensured that the right fluid level and fluid pressure in the system is set to obtain the wanted power (kW) of the hydraulically driven power generator no matter how the waves are acting on a body of water in which the system is situated.
Many hydraulic wave converters comprise one or more pistons that translate the movements of waves acting on a body of water into a pulsating fluid flow. The fluid may in some wave converters be pumped into one or more accumulators that is prepressurized to for example 200 bars.
The fluid is fed through valves to a hydraulic motor that converts the hydraulic energy to electricity. The valves determine the fluid flow, and thus the effect on the engine. By using valves there will be a pressure drop and thereby a relatively large power loss in the system.
With the gas controlled hydraulic accumulator assembly of the present invention, which is filled with gas in the second space, and filled with fluid in the first space; the hydraulic valves of the prior art becomes redundant, as power regulation only involves regulating the gas pressure in the second space of gas controlled hydraulic accumulator assembly. Hence, according to the present invention, there is normally only a need for a hydraulic valve connection at start-up and synchronization of the generator to the grid.
This means that with the gas controlled hydraulic accumulator assembly of the present invention, it is possible to perform a stepless power regulation of the hydraulically driven power generator with a relatively small power loss. The system according to the present invention can be used for a conventional system with hydraulic oil as fluid, or for a system of water hydraulics, environmentally deemed a "green" option because discharges of water into the sea has no negative effect, while the hydraulic oil can affect wildlife and nature in a negative manner.
In one or more embodiments, the controller, in response to input data, activates the means for altering the gas pressure within the second space of the gas controlled hydraulic accumulator assembly. In the following, the principle is exemplified with two different situations where the same power is wanted. The first situation is when the waves acting on a body of water wherein the system is situated are relatively low, compared to the second situation, in height and/or amplitude. The gas pressure within the second space of the gas controlled hydraulic accumulator assembly should be relatively high, compared to the second situation, to obtain the given power of the hydraulically driven power generator. The second situation is when the waves acting on a body of water wherein the system is situated are relatively high, compared to the first situation, in height and/or amplitude, the gas pressure within the second space of the gas controlled hydraulic accumulator assembly should be relatively low, compared to the first situation, to obtain the given power of the hydraulically driven power generator.
In one or more embodiments, the means for altering the gas pressure within the second space of the gas controlled hydraulic accumulator assembly comprises a gas compressor being in gas communication with the second space of the gas controlled hydraulic accumulator assembly. Preferably, the gas compressor is capable of altering the pressure within the second space of the gas controlled hydraulic accumulator assembly to a pressure within the range of 0-300 bar.
In one or more embodiments, the system comprises means for measuring the flow of fluid within the system, such as a flow meter.
In one or more embodiments, the input data comprises the flow of fluid within the system.
In one or more embodiments, the input data comprises the power performed by the hydraulically driven power generator.
In one or more embodiments, the system further comprises means for measuring the volume of the first space of the gas controlled hydraulic accumulator assembly, and wherein the controller for controlling the gas pressure within the second space of the gas controlled hydraulic accumulator assembly, in response to input data from the means for measuring the volume of the first space of the gas controlled hydraulic accumulator assembly, activates the means for altering the gas pressure within second space of the gas controlled hydraulic accumulator assembly.
In one or more embodiments, the system further comprises one or more one-way valves for directing the fluid from the pump assembly to the second space of the gas controlled hydraulic accumulator assembly.
In one or more embodiments, the system further comprises a motorized valve downstream to the hydraulically driven power generator. This is useful at start-up and synchronization of the generator to the grid.
In one or more embodiments, the system further comprises a motorized valve upstream to the second space of the gas controlled hydraulic accumulator assembly. In a situation where the hydraulically driven power generator is off, the waves will still act on the hydraulic flotation device that continues pumping fluid around the system. Therefore, the motorized valve is adapted to by-pass the gas controlled hydraulic accumulator assembly and the hydraulically driven power generator. This is useful when the system is of the grid, and when the hydraulically driven power generator is off.
In one or more embodiments, the system is a closed system.
Brief description of the figures
Figure 1 shows a system in accordance with various embodiments of the invention. Detailed description of the invention
Referring to Figure 1, the general scheme of the invention is shown in a closed loop circuit, although fluid may be input at the initial stage and exhausted after exiting the turbine if desired.
Figure 1 shows a system for pumping a fluid in response to natural wave action on a body of water 101, such as an ocean. The system comprises a hydraulic flotation device 200 comprising a buoyant actuator 202 and a pump assembly 204. During use, the buoyant actuator 202 is at least partially immersed in the body of water 101, and rises and falls with the rise and fall of the wave motion. The buoyant actuator 202 is coupled to a pump assembly 204 such that the motion of the actuator 202 is transferred into pump motion, and thereby, the fluid in the system is pumped around the system, from the pump assembly towards the other units in the system.
The system also comprises a reservoir 300, such as a tank, for receiving and storing fluid, and being in fluid communication with the pump assembly 204. Generally, the different units being in fluid communication is through conduits, such as pipes or hoses. The pump assembly 204 in Figure 1 is adapted such that the fluid from a reservoir 300 is pumped, by a piston, through different one-way valves 206, depending on the wave action on a body of water 101 rises or lowers the buoyant actuator 202.
When the system is active, the fluid from the pump assembly 204, through different one-way valves 206, is passed into the first space 406 of a gas controlled hydraulic accumulator assembly. The gas controlled hydraulic accumulator assembly, comprises a housing that forms a chamber 402, and a displaceable separation wall 404 disposed within the chamber 402. The displaceable separation wall separates the chamber in a first space 406 and a second space 408. The second space 408 is in communication with means 500 for altering the gas pressure within the second space of the gas controlled hydraulic accumulator assembly.
The means 500 for altering the gas pressure within the second space 408 of the gas controlled hydraulic accumulator assembly is shown as a gas compressor 504; and includes a gas reservoir 502. A one-way valve 506 is inserted between the gas compressor 504 and the gas controlled hydraulic accumulator assembly. Furthermore, a motorized valve 508 is inserted between the gas compressor 504 and the gas controlled hydraulic accumulator assembly to decrease the gas pressure within the second space 408 of the gas controlled hydraulic accumulator assembly. Means 512 for measuring the pressure within the second space 408 of the gas controlled hydraulic accumulator assembly is also included.
With the gas controlled hydraulic accumulator assembly, it is possible to perform a stepless power regulation of the hydraulically driven power generator with a small power loss.
When the fluid leaves the first space 406 of a gas controlled hydraulic accumulator assembly, it reaches a hydraulically driven power generator 600, adapted to receive the fluid pumped through the conduits to generate electrical power.
The system further comprises a controller 700 for controlling the gas pressure within the second space 408 of the gas controlled hydraulic accumulator assembly in response to input data. In Figure 1, the controller 700 is adapted to regulate the fluid level in the first space 406 of the gas controlled hydraulic accumulator assembly in response to input data from means 800 for measuring the flow of fluid within the system.
The system also comprises a motorized valve 910 downstream to the hydraulically driven power generator. This is useful at start-up and synchronization of the generator to the grid.
The system further comprises a motorized valve 900 upstream to the second space of the gas controlled hydraulic accumulator assembly. In a situation where the hydraulically driven power generator is off, the waves will still act on the hydraulic flotation device that continues pumping fluid around the system. Therefore, the motorized valve is adapted to by-pass the gas controlled hydraulic accumulator assembly and the hydraulically driven power generator. This is useful when the system is of the grid, and when the hydraulically driven power generator is off.
References 101 Body of water 200 Hydraulic flotation device 202 Buoyant actuator 204 Pump assembly 206 One-way valve 300 Reservoir 402 Chamber 404 Displaceable separation wall 406 First space 408 Second space 410 Means for measuring the volume of the first space of the gas controlled hydraulic accumulator assembly 500 means for altering the gas pressure within the second space of the gas controlled hydraulic accumulator assembly 502 Gas reservoir 504 Gas compressor 506 One-way valve 508 Motorized valve 510 Motorized valve 512 Pressure transmitter 600 Hydraulically driven power generator 700 Controller 800 Means for measuring the flow of fluid within the system 900 Motorized valve 910 Motorized valve

Claims (10)

1. System til at pumpe et fluid som reaktion på naturlig bølgebevægelse på en vandmasse (101), såsom et hav, hvor systemet omfatter: - en hydraulisk flydeanordning (200), der omfatter en flydende aktuator (202) og en pumpekonstruktion (204); - en beholder (300) til at modtage og lagre fluid, der er i fluidforbindelse med pumpekonstruktionen (204); kendetegnet ved, at systemet yderligere omfatter: - en gastrykstyret hydraulisk akkumulatorkonstruktion, der indbefatter et hus, der danner et kammer (402), og en forskydelig separationsvæg (404), der er anbragt inden i kammeret; hvor den forskydelige separationsvæg (404) deler kammeret (402) i et første rum (406) og et andet rum (408); hvor det første rum (406) er i fluidforbindelse med pumpekonstruktionen (204); - indretning (500) til at ændre gastrykket inden i det andet rum (408) af den gastrykstyrede hydrauliske akkumulatorkonstruktion; - en hydraulisk dreven effektgenerator (600), der er indrettet til at modtage fluidet for at generere elektrisk strøm og være i fluidforbindelse med det første rum (406) af den gastrykstyrede hydrauliske akkumulatorkonstruktion; og - en styreenhed (700) til at styre gastrykket inden i det andet rum (408) af den gastrykstyrede hydrauliske akkumulatorkonstruktion som reaktion på inddata.A system for pumping a fluid in response to natural wave motion on a body of water (101), such as a sea, the system comprising: - a hydraulic float device (200) comprising a liquid actuator (202) and a pump structure (204) ; a container (300) for receiving and storing fluid which is in fluid communication with the pump structure (204); characterized in that the system further comprises: - a gas pressure controlled hydraulic accumulator assembly including a housing forming a chamber (402) and a displaceable separation wall (404) disposed within the chamber; wherein the displaceable separation wall (404) divides the chamber (402) into a first compartment (406) and a second compartment (408); wherein the first compartment (406) is in fluid communication with the pump assembly (204); - device (500) for changing the gas pressure within the second compartment (408) of the gas pressure controlled hydraulic accumulator structure; a hydraulically driven power generator (600) adapted to receive the fluid to generate electric current and be in fluid communication with the first compartment (406) of the gas pressure controlled hydraulic accumulator assembly; and - a control unit (700) for controlling the gas pressure within the second space (408) of the gas pressure controlled hydraulic accumulator construction in response to input. 2. System ifølge krav 1, hvor styreenheden (700) som reaktion på inddata aktiverer indretningen (500) til at ændre gastrykket inden i det andet rum (408) af den gastrykstyrede hydrauliske akkumulatorkonstruktion.The system of claim 1, wherein, in response to input, the controller (700) activates the device (500) to change the gas pressure within the second space (408) of the gas pressure controlled hydraulic accumulator assembly. 3. System ifølge et hvilket som helst af kravene 1-2, hvor indretningen (500) til at ændre gastrykket inden i det andet rum (408) af den gastrykstyrede hydrauliske akkumulatorkonstruktion omfatter en kompressor (504), der er i gasforbindelse med det andet rum (408) af den gastrykstyrede hydrauliske akku m u I ato rko n stru ktio n.System according to any one of claims 1-2, wherein the device (500) for changing the gas pressure within the second space (408) of the gas pressure controlled hydraulic accumulator structure comprises a compressor (504) which is in gas communication with the other space (408) of the gas pressure controlled hydraulic accumulator. 4. System ifølge et hvilket som helst af kravene 1-3, hvor inddataene indbefatter fluidstrømmen inden i systemet.The system of any of claims 1-3, wherein the inputs include the fluid flow within the system. 5. System ifølge et hvilket som helst af kravene 1-4, hvor inddataene indbefatter effekten ydet af den hydraulisk drevne effektgenerator (600).System according to any one of claims 1-4, wherein the inputs include the power provided by the hydraulically driven power generator (600). 6. System ifølge et hvilket som helst af kravene 1-5, der yderligere indbefatter indretningen (410) til at måle volumenet af det første rum (406) af den gastrykstyrede hydrauliske akkumulatorkonstruktion, og hvor styreenheden (700) til at styre gastrykket inden i det andet rum (408) af den gastrykstyrede hydrauliske akkumulatorkonstruktion, som reaktion på inddata fra indretningen (410) til at måle volumenet af det første rum (406) af den gastrykstyrede hydrauliske akkumulatorkonstruktion, aktiverer indretningen (500) til at ændre gastrykket inden i det andet rum (408) af den gastrykstyrede hydrauliske akku m u I ato rko n stru ktio n.A system according to any one of claims 1-5, further including the device (410) for measuring the volume of the first space (406) of the gas pressure controlled hydraulic accumulator structure, and wherein the control unit (700) for controlling the gas pressure within the second space (408) of the gas pressure controlled hydraulic accumulator construction, in response to input from the device (410) to measure the volume of the first space (406) of the gas pressure controlled hydraulic accumulator structure, activates the device (500) to change the gas pressure within it. second compartment (408) of the gas pressure controlled hydraulic accumulator. 7. System ifølge et hvilket som helst af kravene 1-6, der yderligere indbefatter en eller flere envejsventiler (206) til at lede fluidet fra pumpekonstruktionen til det andet rum (408) af den gastrykstyrede hydrauliske akkumulatorkonstruktion.The system of any one of claims 1-6, further including one or more one-way valves (206) for directing the fluid from the pump assembly to the second compartment (408) of the gas pressure controlled hydraulic accumulator assembly. 8. System ifølge et hvilket som helst af kravene 1-7, der yderligere indbefatter en motoriseret ventil (910) nedstrøms for den hydraulisk drevne effektgenerator.A system according to any one of claims 1-7, further including a motorized valve (910) downstream of the hydraulically driven power generator. 9. System ifølge et hvilket som helst af kravene 1-8, der yderligere indbefatter en motoriseret ventil (900) opstrøms for det andet rum (408) af den gastrykstyrede hydrauliske akkumulatorkonstruktion.A system according to any one of claims 1-8, further including a motorized valve (900) upstream of the second compartment (408) of the gas pressure controlled hydraulic accumulator assembly. 10. System ifølge et hvilket som helst af kravene 1-9, hvor systemet er et lukket system.System according to any one of claims 1-9, wherein the system is a closed system.
DK201470168A 2014-04-03 2014-04-03 System for pumping a fluid in response to natural wave action on a body of water DK178143B1 (en)

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DK201470168A DK178143B1 (en) 2014-04-03 2014-04-03 System for pumping a fluid in response to natural wave action on a body of water
PCT/DK2015/000011 WO2015149806A1 (en) 2014-04-03 2015-03-18 System for pumping a fluid in response to natural wave action on a body of water

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DK201470168A DK178143B1 (en) 2014-04-03 2014-04-03 System for pumping a fluid in response to natural wave action on a body of water
DK201470168 2014-04-03

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CA3054474A1 (en) * 2016-02-23 2017-08-31 Quoceant Limited Hydraulic fluid power transmission

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GB2472093A (en) * 2009-07-24 2011-01-26 Aquamarine Power Ltd Wave energy device with movement assistance at end positions of driving member
WO2011057358A1 (en) * 2009-11-13 2011-05-19 Ceto Ip Pty Ltd Hydraulic apparatus
WO2012127234A1 (en) * 2011-03-23 2012-09-27 Aquamarine Power Limited Improvements to the power capture of wave energy converters

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US4781023A (en) * 1987-11-30 1988-11-01 Sea Energy Corporation Wave driven power generation system
US7042112B2 (en) * 2004-02-03 2006-05-09 Seawood Designs Inc. Wave energy conversion system
ITVR20070177A1 (en) * 2007-11-30 2009-06-01 Armando Biondi AIR CHAMBER OSCILLATING DEVICE EQUIPPED WITH MEANS FOR ENERGY EXPLOITATION OF THE MARINE WAVES
GB2459112B (en) * 2008-04-10 2010-04-07 Wavebob Ltd A power take off system for harnessing wave energy

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2472093A (en) * 2009-07-24 2011-01-26 Aquamarine Power Ltd Wave energy device with movement assistance at end positions of driving member
WO2011057358A1 (en) * 2009-11-13 2011-05-19 Ceto Ip Pty Ltd Hydraulic apparatus
WO2012127234A1 (en) * 2011-03-23 2012-09-27 Aquamarine Power Limited Improvements to the power capture of wave energy converters

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