NL2014817A - Method and system for energy conversion from a flow of fluid. - Google Patents

Method and system for energy conversion from a flow of fluid. Download PDF

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Publication number
NL2014817A
NL2014817A NL2014817A NL2014817A NL2014817A NL 2014817 A NL2014817 A NL 2014817A NL 2014817 A NL2014817 A NL 2014817A NL 2014817 A NL2014817 A NL 2014817A NL 2014817 A NL2014817 A NL 2014817A
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NL
Netherlands
Prior art keywords
base station
liquid
gas
flow
fluid
Prior art date
Application number
NL2014817A
Other languages
Dutch (nl)
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NL2014817B1 (en
Inventor
Wentzel Youri
Original Assignee
Seacurrent Holding B V
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
Priority to NL2014817A priority Critical patent/NL2014817B1/en
Application filed by Seacurrent Holding B V filed Critical Seacurrent Holding B V
Priority to KR1020177034462A priority patent/KR102499657B1/en
Priority to CA2985310A priority patent/CA2985310C/en
Priority to AU2016264693A priority patent/AU2016264693B2/en
Priority to US15/574,494 priority patent/US10337489B2/en
Priority to PCT/NL2016/050353 priority patent/WO2016186498A1/en
Priority to EP16744880.2A priority patent/EP3298270B1/en
Priority to JP2018513259A priority patent/JP6771025B2/en
Priority to CN201680028901.9A priority patent/CN107667219B/en
Publication of NL2014817A publication Critical patent/NL2014817A/en
Application granted granted Critical
Publication of NL2014817B1 publication Critical patent/NL2014817B1/en
Priority to PH12017550130A priority patent/PH12017550130A1/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
    • F03D—WIND MOTORS
    • F03D5/00—Other wind motors
    • 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
    • F03B13/26—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 tide energy
    • F03B13/264—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 tide energy using the horizontal flow of water resulting from tide movement
    • 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
    • F03B17/00—Other machines or engines
    • F03B17/06—Other machines or engines using liquid flow with predominantly kinetic energy conversion, e.g. of swinging-flap type, "run-of-river", "ultra-low head"
    • 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
    • F05B2240/90—Mounting on supporting structures or systems
    • F05B2240/91—Mounting on supporting structures or systems on a stationary structure
    • F05B2240/917—Mounting on supporting structures or systems on a stationary structure attached to cables
    • 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
    • F05B2240/90—Mounting on supporting structures or systems
    • F05B2240/91—Mounting on supporting structures or systems on a stationary structure
    • F05B2240/917—Mounting on supporting structures or systems on a stationary structure attached to cables
    • F05B2240/9172—Mounting on supporting structures or systems on a stationary structure attached to cables of kite type with traction and retraction
    • 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
    • F05B2240/90—Mounting on supporting structures or systems
    • F05B2240/92—Mounting on supporting structures or systems on an airbourne structure
    • F05B2240/921—Mounting on supporting structures or systems on an airbourne structure kept aloft due to aerodynamic effects
    • 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
    • F05B2240/90—Mounting on supporting structures or systems
    • F05B2240/92—Mounting on supporting structures or systems on an airbourne structure
    • F05B2240/922—Mounting on supporting structures or systems on an airbourne structure kept aloft due to buoyancy effects
    • 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
    • F05B2240/90—Mounting on supporting structures or systems
    • F05B2240/97—Mounting on supporting structures or systems on a submerged structure
    • 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
    • Y02E10/20—Hydro 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
    • Y02E10/70—Wind 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
    • Y02E10/70—Wind energy
    • Y02E10/728—Onshore wind turbines

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Aviation & Aerospace Engineering (AREA)
  • Power Engineering (AREA)
  • Sustainable Development (AREA)
  • Sustainable Energy (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Oceanography (AREA)
  • Other Liquid Machine Or Engine Such As Wave Power Use (AREA)

Abstract

System for power generation from a flow of fluid, comprising a fluid driven device connected to a tether wherein the tether is coupled with a base station to convert energy from the flow of fluid into transportable energy, wherein the fluid driven device comprises a frame provided with adjustable vanes, and wherein the vanes are individually adjustable for setting into a predefine position relative to the flow of fluid. The fluid driven device comprises a working mode and a retraction mode, wherein in the working mode the vanes are set in a first predetermined position to generate a lift force from the flow of fluid, and wherein in the retraction mode the vanes are set in a second predetermined position to provide a low drag level to the flow of fluid, and wherein the work performed during working mode is larger than the work supplied during retraction mode.

Description

Method and system for energy conversion from a flow of fluid FIELD OF THE INVENTION
The invention relates to a system for energy conversion from a flow of fluid into transportable energy, comprising a fluid driven device connected to a tether wherein the tether is coupled with a base station.
BACKGROUND
Energy demand for human consumption has significantly increased over the last decades and it has been forecasted that, due to growth of the world population, energy demand will further grow. Energy, according to the definition of physicists, can neither be created nor consumed or destroyed. However, energy may be converted or transferred to different forms. These forms can be, for example mechanical or electrical energy. At present a significant portion of the supplied mechanical and electrical energy is based on energy conversion by means of combustion of fossil fuels. These fossil fuels have been developed in billions of years and it has been predicted that mankind is utilizing them in a period of a few hundred years. Besides the problem that we will run out of fossil fuels at a certain moment, investigations show that combustion of fossil fuels contributes significantly to air pollution and the production of greenhouse gas. Due to the production of greenhouse gasses it has been projected that the Earth's surface temperature could exceed historical analogs affecting most ecosystems on Earth.
As a way forwards, it is proposed to save these valuable fossil resources for purposes that fully rely on fossil fuels and that alternative forms of energy, preferable renewables such as wind, sun and tidal energy are being used for purposes that have a less direct demand for fossil fuels such as, for example, production of electricity.
Even though renewable energy has been recognized as a resource for global energy demand, due to the nature of renewable energy, there are a number of issues to tackle. One of them is that the amount of energy available is restricted. Furthermore the number of locations available for harvesting renewable energy is limited. From this it can be concluded that if renewable energy has to make a significant contribution to the worlds energy demand, the need is brought forward to convert renewable energy at available locations with the highest possible conversion rate. An additional challenge is that the price of renewable energy has to be at such a level that a transition from conventional energy to renewable energy can be borne by the market. This brings forward the additional requirement that conversion has to be cost-effective.
Humans have converted energy from a flow of fluid, for example wind or moving water, since mankind. Energy conversion from wind has many similarities to energy conversion from moving water. However, three major differences are that, the density of water is about one thousand times greater than the density of air, and in general the velocities of moving water are less than those of wind, and water streams, such as tidal and Gulf streams, are more predictable than those of wind. US2002/004090948A1 Apr. 11, 2002 by inventor Gary Dean Ragner discloses a conversion system wherein multiple airfoil kites in tandem are attached by means of control lines and support lines to a control housing. The control lines can change length to control the airfoils kites' angle-of-attack, pitch angle, direction of flight, and flight speed. The length of control lines are controlled from ground station to adjust the airfoils' direction to follow a specific flight path. Control lines and support lines are also wound on a power shaft in control housing. The control of this known system is complex and due to the long control cables the system is difficult to control. Due to the requirement to reel them in and out the cables are subjected to extensive tear and wear which is introducing frequently inspection and maintenance activities. Furthermore, due to controlling the airfoil kites in tandem, it is not possible to adjust the angle-of-attack of each airfoil kite individually. This is disadvantageous as the airfoils are operated in the vicinity of other airfoils and, due to the long string of airfoil kites, the direction of the air flow experienced by the individual airfoil kits is different to each other.
Besides that next to the aforementioned system other types of systems are known that are able to convert energy, all the known systems suffer from a number of disadvantages: a) The known systems have a low conversion rate and as a result the majority of the available energy remains untouched. At present, the common way of mitigating these disadvantages is to install multiple systems in series.
The function of the systems installed downstream of the first system is merely to compensate for the weak performance of the first system. It goes without saying that the cost of developing such a row of systems is much higher than the installation of a single system that is able to convert the available energy in one go. b) The known systems suffer furthermore from a low efficiency caused by significant losses during conversion and transfer of the converted energy. As the converted energy most of the time is consumed at a remote location, the losses during transfer of energy have a significant impact on the system performance. c) Components used in the known systems are subjected to extensive tear and wear and/or the systems have been designed such that inspection and maintenance is complex and expensive .
OBJECT OF THE INVENTION
It is an object of the invention to provide an alternative to this and other known systems. It is a further object of the invention to improve prior art and to provide a system and method for energy conversion which is relatively efficient. It is still a further object of the invention to provide a system and method for energy conversion which is easy to control and maintain.
These and other objects and advantages of the invention which will become apparent from the following disclosure, are provided by the system and method according to any one of the appended claims.
SUMMARY OF THE INVENTION
In a first aspect of the invention the fluid driven device of the system of the invention is provided with at least two adjustable vanes, a first and a second vane, which vanes are independently adjustable with respect to each other, whereby during use and as seen in the flow of the fluid the first vane and the second vane occupy a position following each other. With at least two independently adjustable vanes energy can be converted from a flow of fluid to a maximum extend, particularly by arranging that the adjustable vanes can be positioned individually in the optimal angle of attack relative to the flow of fluid direction that each vane is experiencing .
For positioning the adjustable vane in the optimal angel of attack it is preferred that the fluid driven device is provided with a flow of fluid direction indicating sensor for determination of the flow of fluid direction in the vicinity of the adjustable vane, and a controller receivingly connected to said flow of fluid direction indicating sensor, and an actuator receivingly connected to said controller for changing the orientation of the adjustable vane with reference to the flow of fluid caused by control actions of said controller that depend on an flow of fluid direction as measured with the flow of fluid direction indicating sensor. However it is preferred that the flow of fluid direction indicating sensor and controller are located inside the vane, they may also be provided integrated into the frame of the fluid driven device .
As an alternative the fluid driven device may be provided with an adjustable vane wherein the at least one adjustable vane comprises a body, which body is provided with a leading part and with a trailing part wherein the trailing part extends into a relatively sharp extremity in comparison with an extremity of the leading part, and a leading edge that is the foremost edge of the leading part, and a trailing edge that is the rearmost edge of the trailing part, and an imaginary straight chord line joining the leading edge and the trailing edge, and an imaginary chamber line that joins the leading edge and the trailing edge which on any point between the leading edge and the trailing edge occupies an equal distance between an upper surface and a lower surface of the body, and which chamber line crosses the chord line at a point that is nearer to the trailing edge than to the leading edge so as to arrange that the vane is self-positioning. With self-positioning adjustable vanes the conversion rate of the system is optimized, particularly by arranging that the selfpositioning vane positions itself into a desired angle-of-attack relative to the flow of fluid.
It is preferred that the system comprises a working mode and retraction mode and that the fluid driven device is provided with adjustable vanes whereby each of the vanes comprise a leading edge and a trailing edge, and whereby the vanes are arranged in a row along the frame whereby in the retraction mode a leading edge of a first vane is pointing towards a trailing edge of a second vane which is adjacent to the first vane.
According to another aspect of the invention, the base station of the system of the invention comprises a transformation device and a base structure provided with a fluid transfer system. It is preferred that the base structure comprises a stationary inner body that is coupled with a conductor for transfer of transportable energy, and an outer body that is rotatably mounted on the stationary inner body whereby the outer body is provided with a conductor for transfer of transportable energy to and from the transformation device, and an enclosed section that is in open communication with the inner body so as to arrange that the transportable energy can freely flow to and from the stationary inner body. With such a base structure provided with a fluid transfer system the system of the invention can be deployed in a flow of fluid that is changing its direction over time, particularly by arranging that the fluid driven device can rotate freely around the base structure whereby converted energy can be transported and as such the system is able to remain in production when the direction of the flow of fluid is changed over time.
In case the base station is a submerged base station it is preferred that the base station is provided with a mooring whereby the base structure comprises an inner part and that the mooring comprises a upper part whereby the inner part fits around the upper part. In connection therewith it is preferred that the base station is provided with a flexible conductor for transfer of transportable energy. Such type of energy conductor is desirable to facilitate easy movement of the base station, whereby at least a part of the base station is moveable whilst maintaining the coupling with the flexible conductor. This is particularly important when a submerged base station is brought up to water surface for inspection and maintenance. Particular in this situation is it preferred that the conductor is provided with buoyancy means to keep the submerged conductor floating above the bottom enabling easy handling of the conductor while a part of the base station is moved to a different position.
It is preferred that the transformation device is a hydraulic cylinder and that the conductor is a flexible pipe or hose. The tether can then be connected, via the piston rod, to the piston that is movable in the hydraulic cylinder so that movement of the piston causes hydraulic fluid to be displaced in a hydraulic system of which the hydraulic cylinder forms part. This hydraulic fluid can then for instance be used to drive a hydraulic motor that drives an electric generator, or can otherwise be used to make the energy available that is related to the displacement of the hydraulic fluid.
The hydraulic cylinder and the flexible pipe or hose can be operated in a submerged environment without extensive tear and wear resulting in minimal inspection and maintenance activities. Particular in this situation is it preferred that the base station is connectable or connected to a system for converting hydraulic energy into electrical energy. In this setup, the converted energy is efficiently transported from the base station to a distant location. The distant location is for instance an artificial or natural island where ancillary equipment can be placed for converting the harvested energy into electrical energy and whereby the electrical energy can, without much loss, be transported over large distances. Furthermore electrical energy can be easily tailored to the preferably used means of transport by arranging a suitable voltage level, or even by converting AC to DC or DC to AC.
For reducing peak pressures in the hydraulic system of with the hydraulic cylinder forms part it is preferred the base unit is provided with a pulsation damper comprising a chamber provided with a connection at or near the bottom of the chamber whereby a top part of said chamber is filled with a gas .
Although the hydraulic cylinder and flexible pipe are preferred features, the transformation device can be of any type of equipment that is capable of transforming a force into transportable energy, for example an electric generator coupled to a cable spool in combination with an energy conductor comprising an electric cable.
The invention is also embodied in a method for power generation from a flow of fluid, by providing a fluid driven device connected to a tether wherein the tether is coupled with a base station comprising at least one hydraulic cylinder to convert energy from the flow of fluid into transportable energy. According to the invention the fluid driven device is provided with at least two adjustable vanes, a first and a second vane, which vanes are independently adjustable with respect to each other, whereby the method comprises a working mode and a retraction mode, wherein during the working mode and as seen in the flow of the fluid the first vane and the second vane occupy a position following each other whereby the first vane and the second vane are individually positioned into a desired angle of attack relative to the flow of fluid. It is preferred that the fluid driven device is provided with adjustable vanes whereby each of the vanes is comprising a leading edge and a trailing edge, and whereby the vanes are arranged in a row along the frame, whereby the vanes are set, during a part of the retraction mode, in a position whereby the leading edge of a first vane is pointing towards a trailing edge of a second vane which is adjacent to the first vane. By setting the vanes into these positions in the working mode and retraction mode, the work performed by the system during working mode is larger than the work supplied to the system during retraction mode and as such net power is delivered. Controlling switching over from the working mode to the retraction mode and vice versa can simply be done by changing the position of the vanes.
Preferably in the working mode a distance of the fluid driven device to the base station increases whereas said distance of the fluid driven device to the base station decreases when in the retraction mode. In combination with setting the vanes to the appropriate position in the working mode and in the retraction mode, this makes possible that the working mode and the retraction mode can continuously and swiftly alternate .
According to another aspect of the method of the invention the base station is provided with a transformation device comprising at least one hydraulic cylinder and a base structure provided with a fluid transfer system wherein the fluid driven device can freely rotate around the base structure and is following the flow of fluid direction that is changing its direction over time. It is preferred that the base station is provided with a flexible conductor for transfer of transportable energy, whereby the base station or at least a part of the base station is moveable whilst maintaining the coupling with the flexible conductor.
BRIEF DESCRIPTION OF THE DRAWINGS
The invention will hereinafter be further elucidated with reference to the drawing of an exemplary embodiment of a system according to the invention that is not limiting as to the appended claims.
In the drawing: FIG. 1 shows a system for energy conversion according to the invention. FIG. 2 shows a perspective view of a fluid driven device. FIG. 3 shows a section view of a vane that is self positioning. FIG. 4 shows a perspective view of a fluid driven device whereby the vanes are set in a predefined position. FIG. 5 shows a perspective view of the base station. FIG. 6 shows a section view of the base station whereby a fluid flow path is indicated when hydraulic fluid is displaced from the transformation device. FIG. 7 shows a section view of the base station whereby a fluid flow path is indicated when hydraulic fluid is displaced to the transformation device. FIG. 8 shows a typical trajectory of the fluid driven device of the system according to the invention.
Whenever in the figures the same reference numerals are applied, these numerals refer to the same parts.
DETAILED DESCRIPTION
In the following description, Z defines a horizontal flow of fluid direction, X a horizontal direction perpendicular to the flow of fluid direction and Y defines a vertical direction perpendicular to the flow of fluid direction. FIG. 1 shows a system denoted with reference 1 which is used to convert energy from the flow 50 of fluid into transportable energy. The system 1 comprises a fluid driven device 200 connected to a tether 300 wherein the tether 300 is coupled with a base station 400. The base station 400 is attached or attachable to a mooring 480 that is located at a bottom 40 of a sea, river, lake, etc.
Preferably the base station 400 is provided with a transformation device comprising at least one hydraulic cylinder 410. In connection therewith the tether 300 is preferably connected to a piston 412 that is movable in the hydraulic cylinder 410 so that movement of the piston 412 causes hydraulic fluid to be displaced in a hydraulic system of which the hydraulic cylinder 410 forms part. It goes without saying that there may be several hydraulic cylinders 410 with connected tethers 300 and fluid driven devices 200 operating in parallel.
The or each hydraulic cylinder 410 is connectable to a conductor 700 for transferring hydraulic fluid to a distant location where in this exemplary embodiment platform 800 is located. The hydraulic cylinder is connectable or connected to a hydraulic system (not shown) for converting hydraulic energy into electrical energy, and the required means therefore are preferably arranged on the platform 800.
It is preferred that the conductor 700 comprises a flexible pipe or hose for transfer of the hydraulic fluid and that the conductor 700 is provided with buoyancy means 710.
Although the hydraulic cylinder 410 and flexible pipe or hose are preferred features, the transformation device can be of any type of equipment that is capable of transforming a force into transportable energy, for example an electric generator coupled to a cable spool in combination with an energy conductor comprising an electric cable.
Referring now to FIG. 2, a perspective view of the fluid driven device 200 is shown, wherein said fluid driven device is provided with adjustable vanes 240 whereby according to the invention the fluid driven device 200 is provided with at least two adjustable vanes 240, a first 255 and a second 256 vane, which vanes are independently adjustable with respect to each other, whereby during use and as seen in the flow 50 of the fluid the first vane 255 and the second vane 256 occupy a position following each other.
For positioning of the adjustable vanes 240 into the desired angle of attack relative to the flow 50 of fluid, it is preferred that the adjustable vanes 240 are provided with a vane positioning system comprising a flow of fluid direction indicating sensor 261, and a controller 262 receivingly connected to said flow of fluid direction indicating sensor 261, and an actuator 263 receivingly connected to said controller for changing the orientation of the adjustable vane 240 with reference to the flow 50 of fluid caused by control actions of said controller that depend on an flow 50 of fluid direction as measured with the flow of fluid direction indicating sensor 261. For clarity of the drawing only one vane positioning system is indicated.
It is preferable that at least one adjustable vane 240 has a first part 241 and a second part 242, and whereby both parts are independently adjustable with respect to each other. Preferably the first part 241 and second part 242 have substantially equal dimensions and that the first part 241 and second part 242 are positioned in line with each other.
For steering the fluid driven device 200 along a predefined path it is preferred that the fluid driven device is provided with a frame 220 comprising at least one adjustable vane 240, and an orientation indicating sensor 271, and a controller 272 receivingly connected to said orientation indicating sensor 271, and an actuator 273 receivingly connected to said controller 272 for changing the orientation of the adjustable vane 240 with reference to the frame 220 caused by control actions of said controller 272 that depend on an orientation of the frame 220 as measured with the orientation indicating sensor 271. In connection therewith it is advantageous if the frame 220 or at least a part of the frame of the fluid driven device 220 comprises a body 221, which body 221 is provided with a leading part 222 and with a trailing part 223 wherein the trailing part 223 extends into a relatively sharp extremity in comparison with the leading part 222.
Preferably a submerged fluid driven device 200 is provided with buoyancy chamber 293 whereby it is preferred that the buoyancy chamber 293 is an enclosed section of the vane 240 that contains a buoyant substance.
For controlling the position of the fluid driven device in case the velocity of the flow of fluid is zero, it is preferred that the fluid driven device 200 is provided with a buoyancy control system comprising an position indicating sensor 291, and a controller 292 receivingly connected to said position indicating sensor 291, and at least one buoyancy chamber 293 connected to a pump arrangement 294, and the pump arrangement 294 receivingly connected to said controller for changing the position of the fluid driven device 200 relative to a bottom 40 or water surface 42 during its use, caused by control actions of said controller 292 that depend on a position of the fluid driven device 200 as measured with the position indicating sensor 291.
As an alternative to the earlier mentioned vane positioning system, the fluid driven device may be provided with adjustable vanes 240 that are self-positioning. Referring now to FIG. 3 a section view of an adjustable vane 240 is shown comprising a body 243, which body 243 is provided with a leading part 244 and with a trailing part 245 wherein the trailing part 245 extends into a relatively sharp extremity in comparison with an extremity of the leading part 244, and a leading edge 246 that is the foremost edge of the leading part 244, and a trailing edge 247 that is the rearmost edge of the trailing part 245, and an imaginary straight chord line 248 joining the leading edge 246 and the trailing edge 247, and an imaginary chamber line 249 that joins the leading edge 246 and the trailing edge 247 which on any point between the leading edge 246 and the trailing edge 247 occupies an equal distance between an upper surface 250 and a lower surface 251 of the body 243, and which chamber line 249 crosses the chord line 248 at a point that is nearer to the trailing edge 247 than to the leading edge 246 so as to arrange that the vane is selfpositioning .
It is preferred that the system 1 comprises a working mode and retraction mode. Referring now to FIG. 4 a perspective view and top view of a fluid driven device 200 is shown that is provided with adjustable vanes 240 whereby each of the vanes comprise a leading edge 246 and a trailing edge 247, and whereby the vanes 240 are arranged in a row along the frame 220 whereby in the retraction mode a leading edge 246 of a first vane is pointing towards a trailing edge 247 of a second vane which is adjacent to the first vane.
Referring now to FIG. 5 - 7 a perspective view respectively section views of the earlier mentioned base station 400 are shown, comprising a transformation device 410 and a base structure 450 provided with means for connection of the transformation device 410 wherein the base structure 450 comprises a stationary inner body 451 that is coupled with at least one conductor 700 for transfer of transportable energy to and from the stationary inner body 451, and an outer body 452 that is rotatably mounted on the stationary inner body 451, and whereby the outer body 452 is provided with at least one conductor 700 for transfer of transportable energy to and from the transformation device 410, and an enclosed section 464 that is in open communication with the inner body 451 so as to arrange that the transportable energy can freely flow to and from the stationary inner body 451.
It is preferred that the base station 400 is provided with a mooring 480 whereby it is advantageous that the inner part 451 of the base structure 450 fits around a upper part 481 of the mooring 480.
It is advantageous if the base structure 450 is provided with a pulsation damper 454 comprising a chamber 455 provided with a connection 460 at or near the bottom 457 of the chamber 455 whereby a top part 458 of said chamber 455 is filled with a gas for reducing peak pressures in the hydraulic system of which the pulsation damper 454 forms part. FIG. 6 shows a fluid flow path for the case that hydraulic fluid is displaced from the transformation device 410 via the base unit 450 to the platform 800. FIG. 7 shows a fluid flow path for the case that hydraulic fluid is transferred from the platform 800, via the base unit 450, to the transformation device 410.
The system 1 of the invention is particularly suited for executing a method for power generation from a flow 50 of fluid, wherein the fluid driven device 200 is provided with at least two adjustable vanes, a first and a second vane, which vanes are independently adjustable with respect to each other. The method compromises a working mode and a retraction mode, wherein in the working mode the vanes 240 are set into a first predetermined positon relative to the flow 50 of fluid, and wherein in the retraction mode the vanes 220 are set into a second predetermined position.
Positioning the vanes 240 into the first predetermined position results in that during the working mode a distance of the fluid driven device 200 to the base station 400 increases. Likewise in the retraction mode said distance of the fluid driven device 200 to the base station 500 decreases. The method is then preferably executed such that the working mode and the retraction mode alternate.
Figure 8 depicts a first trajectory 14 that is followed by the fluid driven device 200 wherein the vanes 240 are set into the first predetermined position relative to the flow 50 of the fluid whereby it is preferred that the vanes 240 are arranged in a row along the frame 220, and according to the invention during the working mode and as seen in the flow of the fluid the first vane and the second vane occupy a position following each other whereby the first vane and the second vane are individually positioned into a desired angle of attack relative to the flow of fluid.
As a result, the fluid driven device 200 that connects through the tether 300 with the piston 412 of the hydraulic cylinder 410, moves with a steadily increasing distance away from the base station 400. The corresponding movement of the piston 412 causes that the hydraulic fluid in the hydraulic cylinder 400 propagates into the conductor 700 in order to eventually drive (for instance) a hydraulic motor positioned on the platform 800. The hydraulic motor may be connected to an electrical generator for production of electrical energy.
When the fluid driven device 200 has reached a predefined point which may be its largest excursion away from the base station 400, the vanes 240 are set into the second predetermined position whereby it is preferred that, as further illustrated in FIG. 4, at least two adjustable vanes 240 whereby each of the vanes 240 comprise a leading edge 246 and a trailing edge 247, are arranged in a row along the frame 220 whereby in the retraction mode a leading edge 246 of a first vane is pointing towards a trailing edge 247 of a second vane which is adjacent to the first vane.
During retraction mode, the piston 412 is caused to retract the fluid driven device 200 to its original position, thereby also causing that the distance between the fluid driven device 200 and the base station 500 is decreased to a predefined distance which may be its shortest distance. During the retraction mode the fluid driven device 200 follows the trajectory 15 until it arrives at the predefined distance with reference to the base station 500, at which time the vanes 220 are set again to the first predetermined position, and the fluid driven device 200 can follow a second trajectory 16 of the working mode. Similarly as with the transition from the first trajectory 14 of the working mode to trajectory 15 of the retraction mode, the second trajectory 16 of the working mode is at a given time followed by another trajectory 17 in the retraction mode of the fluid driven device 200. Trajectory 17 is after its completion followed again by trajectory 14 of the working mode and so on to repeat the process of continuous back-and-forth movement of the fluid driven device 200. Correspondingly the piston 412 of the hydraulic cylinder 410 re peatedly goes back and forth to expel and receive back hydraulic fluid from the hydraulic system comprising conductor 700 connected to the hydraulic cylinder 410, whereby the work performed during working mode is larger than the work supplied during retraction mode.
From the description above, a number of advantages of my improved method and system for energy conversion from a flow of fluid become evident: the improved system enables renewable energy conversion from a flow of fluid in a reliable and cost-effective way and will obviate the need of complex and maintenance intensive installations. the converted energy is transferred with minimum losses to the central power station where it efficiently can be converted into electrical energy. As conversion and transportation losses are minimized, a maximum amount of energy is available for clean power generation. the conversion rate of the system is high and kinetic energy of the flow of fluid can be harvested to a maximum extend and in one go, thus avoiding the need for installation of additional conversion units in series. with the use of an environmentally friendly hydraulic fluid and the given that the complete installation can be removed if no longer in use without any damage to its surroundings, the system is extreme environmentally friendly.
Accordingly, the skilled person will see that the improved system of this invention can be used for reliable and cost-effective energy conversion from a flow of fluid, can be installed easily and removed just as easily and without damaging the environment, and can be inspected and maintained without the need for complicated under water activities. In addition, the fluid driven device of the system is extreme maneuverable and can be directed along any never ending predefined trajectory without causing energy leakage. Furthermore, the improved system for energy conversion has the additional advantages in that it enables the production of clean energy from shallow and deep water streams without requiring complicated construe- tion of submerged foundations. it provides a scalable system that can be tailored to local conditions of any location without the need for complex redesign . it enables cost-effective energy conversion from a flow of fluid that has a low energy density and as such is expanding the number of possible locations for harvesting of renewable energy at a cost price that can be borne by the market.
Although the invention has been discussed in the foregoing with reference to an exemplary embodiment of the system and method for energy conversion from a flow of fluid according to the invention, the invention is not restricted to this particular embodiment which can be varied in many ways without departing from the gist of the invention. The discussed exemplary embodiment shall therefore not be used to construe the appended claims strictly in accordance therewith. On the contrary the embodiment is merely intended to explain the wording of the appended claims without intent to limit the claims to this exemplary embodiment. The scope of protection of the invention shall therefore be construed in accordance with the appended claims only, wherein a possible ambiguity in the wording of the claims shall be resolved using this exemplary embodiment.

Claims (14)

1. Systeem (1) voor energie-omzetting uit een stroom (50) van vloeistof of gas, omvattende een vloeistof of gas aangedreven inrichting (200), een tether (300) en een basisstation (400), waarbij de vloeistof of gas aangedreven inrichting (200) is verbonden met de tether (300), en de tether (300) gekoppeld is met het basisstation (400) , met het kenmerk, dat de vloeistof of gas aangedreven inrichting (200) voorzien is van ten minste twee instelbare bladen (240), een eerste (255) en een tweede (256) blad, welke bladen onafhankelijk instelbaar zijn ten opzichte van elkaar, waarbij tijdens gebruik en gezien in de stroming (50) van de vloeistof of gas het eerste blad (255) en het tweede blad (256) een elkaar opvolgende positie innemen.A system (1) for energy conversion from a stream (50) of liquid or gas, comprising a liquid or gas driven device (200), a tether (300) and a base station (400), wherein the liquid or gas is driven device (200) is connected to the tether (300), and the tether (300) is coupled to the base station (400), characterized in that the liquid or gas-driven device (200) is provided with at least two adjustable blades (240), a first (255) and a second (256) blade, which blades are independently adjustable with respect to each other, wherein during use and seen in the flow (50) of the liquid or gas the first blade (255) and the second sheet (256) occupying a consecutive position. 2. Systeem (1) volgens conclusie 1, met het kenmerk, dat de vloeistof of gas aangedreven inrichting (200) voorzien is van: a) een richting van de vloeistof- of gas-stroom indicerende sensor (261), en b) een regelaar (262) die ontvangend gekoppeld is met genoemde richting van de stroom indicerende sensor (261), en c) een actuator (263) die ontvangend gekoppeld is met genoemde regelaar voor het veranderen van de oriëntatie van het instelbare blad (240) ten opzichte van de stroom (50) van vloeistof of gas door regelacties van genoemde regelaar die afhangen van een stromingsrichting van de stroom (50) zoals gemeten met de richting van de stroom indicerende sensor (261) .A system (1) according to claim 1, characterized in that the liquid or gas driven device (200) comprises: a) a direction of the liquid or gas flow indicating sensor (261), and b) a controller (262) receivably coupled to said direction of the flow indicating sensor (261), and c) an actuator (263) receivably coupled to said controller for changing the orientation of the adjustable blade (240) relative to of the flow (50) of liquid or gas by control actions of said controller depending on a flow direction of the flow (50) as measured with the direction of the flow-indicating sensor (261). 3. Systeem (1) volgens conclusie 1 of 2, met het kenmerk, dat de vloeistof of gas aangedreven inrichting (200) voorzien is van ten minste één instelbaar blad (240) waarbij het ten minste ene instelbare blad (240) omvat: a) een lichaam (243), welk lichaam (243) voorzien is van een leidend deel (244) en een volgend deel (245) waarbij het volgend deel (245) uitmondt in een relatief scherp uiteinde in vergelijking met een uiteinde van de het leidend deel (244), en b) een voorrand (246) welke de uiterste rand van het leidend deel (244) vormt, en c) een achterrand (247) die het achterste uiteinde vormt van het volgende deel (245), en d) een imaginaire rechte koordlijn (248) die de voorrand (246) en de achterrand (247) met elkaar verbindt, en e) een imaginaire kamberlijn (249) die de voorrand (246) en de achterrand (247) met elkaar verbindt welke op ieder punt tussen de voorrand (246) en de achterrand (247) een gelijke afstand inneemt tussen een bovenoppervlak (250) en een on-deroppervlak (251) van het lichaam (243), en welke kamber-lijn (249) de koordlijn (248) kruist op een punt dat dichter ligt bij de achterrand (247) dan bij de voorrand (246) teneinde te bewerkstelligen dat het blad zelf-positionerend is.System (1) according to claim 1 or 2, characterized in that the liquid or gas-driven device (200) is provided with at least one adjustable blade (240), the at least one adjustable blade (240) comprising: ) a body (243), which body (243) is provided with a guiding part (244) and a following part (245), the following part (245) opening into a relatively sharp end compared to an end of the leading part part (244), and b) a leading edge (246) which forms the extreme edge of the leading part (244), and c) a trailing edge (247) which forms the rear end of the following part (245), and d) an imaginary straight cord line (248) connecting the leading edge (246) and the trailing edge (247), and e) an imaginary combing line (249) connecting the leading edge (246) and the trailing edge (247) which each point between the leading edge (246) and the trailing edge (247) occupies an equal distance between an upper surface (250) and a lower surface ( 251) of the body (243), and which comb line (249) crosses the cord line (248) at a point closer to the trailing edge (247) than to the trailing edge (246) to cause the blade to self- positioning. 4. Systeem (1) volgens één der conclusies 1-3, met het kenmerk, dat de vloeistof of gas aangedreven inrichting (200) voorzien is van ten minste twee instelbare bladen (240), waarbij: a) ieder van de bladen (240) een voorrand (246) en een achterrand (247) bezit, b) het systeem (1) een werkmodus en een terugkeermodus bezit, waarbij c) de bladen (240) in een rij langs het frame (220) zijn opgesteld waarbij in de terugkeermodus een voorrand (246) van een eerste blad wijst naar een achterrand (247) van een tweede blad welke naast het eerste blad ligt.A system (1) according to any one of claims 1-3, characterized in that the liquid or gas driven device (200) is provided with at least two adjustable blades (240), wherein: a) each of the blades (240) ) has a leading edge (246) and a trailing edge (247), b) the system (1) has a working mode and a return mode, c) the blades (240) being arranged in a row along the frame (220) with the return mode a leading edge (246) of a first sheet points to a trailing edge (247) of a second sheet which is adjacent to the first sheet. 5. Basisstation (400) voor omzetting van energie uit een stroom (50) van vloeistof of gas in een transporteerbare energie, omvattende een transformatie-inrichting (410) en een basisstructuur (450) voorzien van middelen voor verbinding van de transformatie-inrichting (410), met het kenmerk, dat de basisstructuur (450) omvat: a) een stationair binnenlichaam (451) dat gekoppeld is met ten minste één geleider (700) voor overdracht van transporteerbare energie naar en van het stationaire binnenlichaam (4 51), en b) een buitenlichaam (452) dat roteerbaar gemonteerd is op het stationaire binnenlichaam (451), en waarbij het buitenlichaam (452) voorzien is van ten minste één geleider (700) voor overdracht van transporteerbare energie naar en van de transformatie-inrichting (410), en een omsloten deel (464) dat in open verbinding staat met het binnenlichaam (451) teneinde te bewerkstelligen dat de transporteerbare energie vrij kan stromen naar en van het stationaire binnenlichaam (451) .A base station (400) for converting energy from a stream (50) of liquid or gas into a transportable energy, comprising a transformation device (410) and a basic structure (450) provided with means for connecting the transformation device ( 410), characterized in that the basic structure (450) comprises: a) a stationary inner body (451) coupled to at least one conductor (700) for transferring transportable energy to and from the stationary inner body (4 51), and b) an outer body (452) rotatably mounted on the stationary inner body (451), and wherein the outer body (452) is provided with at least one conductor (700) for transferring transportable energy to and from the transformer ( 410), and an enclosed portion (464) in open communication with the inner body (451) to cause the transportable energy to flow freely to and from the stationary inner body (451). 6. Basisstation (400) volgens conclusie 5, met het kenmerk, dat het basisstation (400) voorzien is van een houvast (480) waarbij de basisstructuur (450) een binnendeel (451) omvat en dat de houvast (480) een bovendeel (481) bezit waarbij het binnendeel (451) past rond het bovendeel (481).The base station (400) according to claim 5, characterized in that the base station (400) is provided with a support (480), the base structure (450) comprising an inner part (451) and the support (480) having an upper part ( 481) wherein the inner member (451) fits around the upper member (481). 7. Basisstation (400) volgens conclusie 5 of 6, met het kenmerk, dat het basisstation (400) voorzien is van een flexibele geleider (700) voor overdracht van transporteerbare energie waarbij ten minste een deel van het basisstation (400) beweegbaar is onder handhaving van de koppeling met de flexibele geleider (700) .Base station (400) according to claim 5 or 6, characterized in that the base station (400) is provided with a flexible conductor (700) for transferable transportable energy, wherein at least a part of the base station (400) is movable under maintaining the connection with the flexible conductor (700). 8. Basisstation (400) volgens één der conclusies 5 - 7, met het kenmerk, dat de geleider (700) voorzien is van drijfmiddelen (710).Base station (400) according to one of claims 5 to 7, characterized in that the conductor (700) is provided with floating means (710). 9. Basisstation (400) volgens één der conclusies 5 - 8, met het kenmerk, dat de transformatie-inrichting (410) een hydraulische cilinder is en dat de geleider (700) een flexibele pijp of slang is.The base station (400) according to any of claims 5 to 8, characterized in that the transformer (410) is a hydraulic cylinder and that the guide (700) is a flexible pipe or hose. 10. Basisstation (400) volgens één der conclusies 5 - 9, met het kenmerk, dat de basisstructuur (450) voorzien is van een pulsatiedemper (454) omvattende een kamer (455) voorzien van een verbinding (460) ter plaatse van of nabij de bodem (457) van de kamer (455), waarbij een bovendeel (458) van genoemde kamer (455) gevuld is met een gas voor het reduceren van piekdrukken in het hydraulisch systeem van welke de pulsatiedemper (454) deel uitmaakt.The base station (400) according to any of claims 5 to 9, characterized in that the base structure (450) is provided with a pulsation damper (454) comprising a chamber (455) provided with a connection (460) at or near the bottom (457) of the chamber (455), wherein an upper part (458) of said chamber (455) is filled with a gas for reducing peak pressures in the hydraulic system of which the pulsation damper (454) forms part. 11. Werkwijze voor energie-omzetting uit een stroom (50) van vloeistof of gas, door het voorzien van een door vloeistof of gas aangedreven inrichting (200) , een tether (300) en een basisstation (400), waarbij de vloeistof of gas aangedreven inrichting (200) verbonden is met de tether (300) , en de tether (300) gekoppeld is met het basisstation (400), gekenmerkt door: a) het voorzien van de vloeistof of gas aangedreven inrichting (200) van ten minste twee instelbare bladen (240) , een eerste (255) en een tweede (256) blad, welke bladen onafhanke- lijk ten opzichte van elkaar instelbaar zijn, b) het voorzien in een werkmodus en een terugkeermodus, waarbij gedurende de werkmodus en gezien in de stroom (50) van de vloeistof of gas het eerste blad (255) en het tweede blad (256) een elkaar opvolgende positie innemen waarbij het eerste blad (255) en het tweede blad (256) individueel gepositioneerd zijn in een gewenste invalshoek ten opzichte van de stroom vloeistof of gas.A method for energy conversion from a stream (50) of liquid or gas, by providing a liquid or gas driven device (200), a tether (300) and a base station (400), wherein the liquid or gas driven device (200) is connected to the tether (300), and the tether (300) is coupled to the base station (400), characterized by: a) providing the liquid or gas driven device (200) with at least two adjustable blades (240), a first (255) and a second (256) blade, said blades being adjustable independently of each other, b) providing a working mode and a return mode, wherein during the working mode and seen in the flow (50) of the liquid or gas the first leaf (255) and the second leaf (256) take a successive position with the first leaf (255) and the second leaf (256) being individually positioned at a desired angle of incidence with respect to of the liquid or gas stream. 12. Werkwijze volgens conclusie 11, gekenmerkt door het uitvoeren van de door vloeistof of gas aangedreven inrichting (200) met instelbare bladen (240) waarbij ieder van de bladen (240) is uitgerust met een voorrand (246) en een achterrand (247), en het plaatsen van de bladen (240) in een rij langs het frame (220), waarbij de bladen (240) gedurende een deel van de terugkeermodus in een positie zijn gesteld waarbij een voorrand (246) van een eerste blad (255) wijst naar een achterrand (247) van een tweede blad (256) welke naast het eerste blad (255) ligt.A method according to claim 11, characterized by carrying out the liquid or gas driven device (200) with adjustable blades (240) wherein each of the blades (240) is provided with a front edge (246) and a rear edge (247) and placing the sheets (240) in a row along the frame (220), the sheets (240) being positioned during part of the return mode in which a leading edge (246) of a first sheet (255) points to a trailing edge (247) of a second sheet (256) which is adjacent to the first sheet (255). 13. Werkwijze volgens conclusie 11 of 12, gekenmerkt door het uitvoeren van het basisstation (400) met een trans-formatie-inrichting omvattend ten minste één hydraulische cilinder (410) en een basisstructuur (450) voorzien van een vloeistof- of gas-overdrachtsysteem waarbij de door vloeistof of gas aangedreven inrichting (200) vrij kan roteren rond de basisstructuur en de stromingsrichting van de vloeistof of gas kan volgen zoals deze in de tijd verloopt.A method according to claim 11 or 12, characterized by outputting the base station (400) with a transforming device comprising at least one hydraulic cylinder (410) and a basic structure (450) provided with a liquid or gas transfer system wherein the liquid or gas powered device (200) can rotate freely around the basic structure and follow the flow direction of the liquid or gas as it proceeds over time. 14. Werkwijze volgens één der conclusies 11 - 13, gekenmerkt door het voorzien van een basisstation (400) van een flexibele geleider (700) voor overdracht van transporteerbare energie, waarbij het basisstation of ten minste een deel van het basisstation (400) beweegbaar is onder handhaving van de koppeling met de flexibele geleider (700).A method according to any one of claims 11-13, characterized by providing a base station (400) with a flexible conductor (700) for transferable transportable energy, wherein the base station or at least a part of the base station (400) is movable while maintaining the connection to the flexible conductor (700).
NL2014817A 2015-05-18 2015-05-18 Method and system for energy conversion from a flow of fluid. NL2014817B1 (en)

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NL2014817A NL2014817B1 (en) 2015-05-18 2015-05-18 Method and system for energy conversion from a flow of fluid.
CA2985310A CA2985310C (en) 2015-05-18 2016-05-18 Method and system for energy conversion from a flow of fluid
AU2016264693A AU2016264693B2 (en) 2015-05-18 2016-05-18 Method and system for energy conversion from a flow of fluid
US15/574,494 US10337489B2 (en) 2015-05-18 2016-05-18 Method and system for energy conversion from a flow of fluid
KR1020177034462A KR102499657B1 (en) 2015-05-18 2016-05-18 Methods and systems for converting energy from the flow of a fluid
PCT/NL2016/050353 WO2016186498A1 (en) 2015-05-18 2016-05-18 Method and system for energy conversion from a flow of fluid
EP16744880.2A EP3298270B1 (en) 2015-05-18 2016-05-18 Method and system for energy conversion from a flow of fluid
JP2018513259A JP6771025B2 (en) 2015-05-18 2016-05-18 Methods and systems for energy conversion from fluid flow
CN201680028901.9A CN107667219B (en) 2015-05-18 2016-05-18 Method and system for converting energy from a fluid stream
PH12017550130A PH12017550130A1 (en) 2015-05-18 2017-11-08 Method and system for energy conversion from a flow of fluid

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Citations (3)

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Publication number Priority date Publication date Assignee Title
WO1980001705A1 (en) * 1979-02-13 1980-08-21 P Broberg Energy system
WO2007139412A1 (en) * 2006-05-31 2007-12-06 Omnidea, Lda. Atmospheric resources explorer
WO2009097000A1 (en) * 2008-02-02 2009-08-06 Wes Martin Systems and methods for a linear hydrokinetic generator

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1980001705A1 (en) * 1979-02-13 1980-08-21 P Broberg Energy system
WO2007139412A1 (en) * 2006-05-31 2007-12-06 Omnidea, Lda. Atmospheric resources explorer
WO2009097000A1 (en) * 2008-02-02 2009-08-06 Wes Martin Systems and methods for a linear hydrokinetic generator

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