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WO2019021000A1 - Système de capture d'énergie marémotrice - Google Patents

Système de capture d'énergie marémotrice Download PDF

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Publication number
WO2019021000A1
WO2019021000A1 PCT/GB2018/052096 GB2018052096W WO2019021000A1 WO 2019021000 A1 WO2019021000 A1 WO 2019021000A1 GB 2018052096 W GB2018052096 W GB 2018052096W WO 2019021000 A1 WO2019021000 A1 WO 2019021000A1
Authority
WO
WIPO (PCT)
Prior art keywords
water
turbine
pump
output shaft
storage reservoir
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/GB2018/052096
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English (en)
Inventor
Rod EKERN
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Individual
Original Assignee
Individual
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Filing date
Publication date
Application filed by Individual filed Critical Individual
Publication of WO2019021000A1 publication Critical patent/WO2019021000A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
    • F03B—MACHINES OR ENGINES FOR LIQUIDS
    • F03B13/00—Adaptations of machines or engines for special use; Combinations of machines or engines with driving or driven apparatus; Power stations or aggregates
    • F03B13/06—Stations or aggregates of water-storage type, e.g. comprising a turbine and a pump
    • 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
    • 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
    • F03B13/268—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 making use of a dam
    • 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
    • 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
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/16—Mechanical energy storage, e.g. flywheels or pressurised fluids

Definitions

  • the present invention relates to renewable energy systems.
  • the present invention relates to systems for harnessing tidal energy.
  • renewable energy systems include devices for capturing solar, wind, wave, and tidal power. Growth in the use of renewable energy is constrained only by the ability to produce and deliver it at an economic price. The majority of renewable energy devices relate solely to wind and solar power generation, and do not address renewable energy produced from water.
  • Ocean and tidal currents are capable of providing a virtually inexhaustible supply of emission-free renewable energy. Since ocean and tidal currents exist everywhere in the world, converting the energy in these currents to electricity could provide a predictable and reliable supply of electricity to the electric power systems in many parts of the world. Since some seventy percent of the world's population lives within about 200 miles of an ocean, ocean current energy and ocean tidal energy could become a vital part of the world's energy future. There are also countless numbers of island
  • Tidal power devices offer advantages over wave power devices. Tides are regular and predictable, whereas wave power depends essentially upon weather conditions.
  • tidal power devices Another advantage of tidal power devices is the fact that less complex structures can be employed at coastal sites, because locations for tidal devices are generally exposed to less extreme weather so that the devices do not have to be constructed to the same level of survivability as ocean wave power devices.
  • the most common water turbine in use today is the Francis turbine.
  • This is an inward- flow reaction turbine in which the working fluid horizontally enters the turbine under great pressure and energy is extracted by the turbine blades from the working fluid. Part of the energy given up by the fluid is because of pressure changes occurring in the blades while the remaining part of the energy is extracted by the spiral casing of the turbine.
  • water acts on the spinning cup-shaped runner features, leaving at low velocity and low swirl with very little kinetic or potential energy left.
  • the turbine's exit tube is shaped to help decelerate the water flow and recover the pressure.
  • Kaplan turbine is a propeller-type water turbine with adjustable blades. This turbine allows efficient power production in low-head applications not possible with Francis turbines.
  • the Kaplan turbine is an outward flow reaction turbine. Power is recovered from both the hydrostatic head and from the kinetic energy of the flowing water. Water is directed tangentially and spirals on to a propeller shaped runner, causing it to spin.
  • the outlet is a specially shaped draft tube that helps decelerate the water and recover kinetic energy.
  • the variable geometry of the blades allows efficient operation for a range of flow conditions. According to the present invention there is provided a tidal energy capturing system comprising:
  • a lower level storage reservoir located at a first height above sea level
  • an upper level storage reservoir located at a second greater height above sea level
  • a first turbine device having first turbine blades and a first output shaft and located at or around sea level in a moving body of water, wherein the first turbine device is adapted to be acted upon by movement of the body of water to cause rotation of the first turbine blades and first output shaft;
  • a first pump device coupled to the output shaft and adapted to pump water from the lower level storage reservoir to the upper level storage reservoir
  • a second turbine device having second turbine blades and a second output shaft and located between the lower and upper level storage reservoirs, wherein the second turbine device is adapted to be acted upon by the flow of water from the higher level storage reservoir to the lower level storage reservoir to cause rotation of the second turbine blades and second output shaft.
  • the moving body of water is a tidal body of water.
  • movement of the body of water is due to current flow and/or waves.
  • the system includes a barrier member located at or around sea level in the body of water, the barrier member dividing the body of water into a first and a second volume of water.
  • the first turbine device is provided at the barrier member.
  • the barrier member includes a first conduit arrangement which fluidly connects the first and second volumes of water.
  • the first turbine device is provided within the first conduit arrangement.
  • the first conduit arrangement is adapted to provide a first flow path from the first to the second volume of water.
  • the first conduit arrangement is adapted to provide a second flow path from the second to the first volume of water.
  • the barrier member includes at least one check valve for providing the first and second flow paths.
  • the barrier member includes a plurality of first conduit arrangements and a first turbine device is provided in each first conduit arrangement.
  • the or each first turbine device is a Kaplan turbine.
  • the first pump device is coupled to the first output shaft via a second pump device.
  • the second pump device is adapted to pump a hydraulic fluid via a second conduit to a hydraulic motor.
  • the hydraulic motor is adapted to operate the first pump device.
  • the second pump device is a hydraulic pump.
  • the system includes a plurality of second pumps.
  • a second pump is connected to each first turbine device.
  • the or each second pump is contained within a sealed chamber provided at each first conduit arrangement.
  • the second conduit includes a manifold portion for fluidly connecting to a plurality of second pumps.
  • the manifold portion fluidly connects the plurality of second pumps to a single hydraulic motor.
  • the lower and the upper level storage reservoirs each comprise fresh water.
  • the first pump device is adapted to pump fresh water from the lower to the upper level storage reservoir.
  • At least one of the hydraulic motor and the second pump device are adapted to change the rotation speed of the first pump device relative to the first turbine device.
  • at least one of the hydraulic motor and the second pump device are adapted to increase the rotation speed of the first pump device relative to the first turbine device.
  • the second turbine device comprises a Francis turbine.
  • the output shaft of the second turbine device is coupled to electricity generating apparatus.
  • Figure 1 is schematic view of a system in accordance with the invention
  • Figure 2 is a plan view of a turbine, barrier, and conduit arrangement of the system of Figure 1;
  • Figure 3 is a schematic side view of the system of Figure 1.
  • FIGS 1 and 3 show a tidal energy capturing system 10 comprising a lower level storage reservoir or lake 12 and an upper level storage reservoir or lake 14.
  • These lakes could be artificial or they could be natural lakes selected for their proximity and suitable vertical elevations.
  • Both of the lakes are located at a body of land which is near to a tidal body of water such as an ocean or sea 16. Both lakes comprise fresh water.
  • the lower lake 12 could be 20 vertical meters above sea level 100 and the upper lake 14 could be 300 vertical meters above the lower lake 12.
  • the land and sea 16 may define an estuary 18.
  • the first pump 32 pumps water from the lower lake 12 up to the upper lake 14 via a pump discharge pipe 34.
  • the system includes a barrier in the form of a dyke 20 located in the sea 16.
  • the dyke 20 divides the sea 16 into a first volume of water (within the estuary 18) and a second volume of water (the main body of the sea 16).
  • the dyke 20 includes a tunnel arrangement 22 fluidly connecting the two volumes of water.
  • the tunnel arrangement 22 comprises a first conduit arrangement 24, a gate 29 and four check valves 25 which define two flow paths.
  • the first conduit arrangement 24 provides a first flow path 26 from the sea 16 to the estuary 18. When the tide is coming in, the sea water can only take this flow path 26 due to the check valves 25 and gate 29.
  • the first conduit arrangement 24 also provides a second flow path 28 from the estuary 18 to the sea 16 and, when the tide is going out, the sea water takes this flow path 28.
  • the inlets of the tunnel arrangement 22 on the ocean side are each protected by a barricade island 27 which is positioned to dampen wave action in the tunnel which could impact the turbine assembly.
  • a first turbine device in the form of a Kaplan turbine 30 is provided at each tunnel arrangement 22. Water flowing along either the first or second flow paths acts upon blades of the Kaplan turbine 30 causing rotation of the blades and of an output shaft coupled to the blades.
  • the first conduit arrangement 24 and check valves 25 ensure that the blades and output shaft rotate in the same direction regardless of whether the tide is coming in or going out.
  • Each Kaplan turbine 30 and its component parts can be constructed largely of light weight, corrosion resistant materials, such as aluminium and fiberglass.
  • each Kaplan turbine 30 is connected to a second pump 42 such that the Kaplan turbine 30 drives the second pump 42.
  • Each second pump 42 is a hydraulic pump provided in a sealed chamber 31 within the dyke 20. Only a portion of the shaft of each second pump 42 is exposed to sea water. It should be noted that, for the system as a whole, only the Kaplan turbine 30 is exposed to sea water. Therefore, only this component needs to be specially adapted such that it is corrosion resistant.
  • a manifold (not shown) fluidly connects the output from each second pump 42 to a single hydraulic motor 46 via a second conduit 44.
  • the first pump 32 is (indirectly) coupled to the Kaplan turbines 30 by a second pump in the form of a hydraulic pump 42 which pumps a hydraulic fluid to the hydraulic motor 46.
  • the high pressure hydraulic fluid operates the hydraulic motor 46 which is used to operate the first pump 32.
  • Water in the upper lake 14 can naturally flow down due to gravity to the lower lake 12 via a drainage conduit or penstock 36.
  • a movable gate (not shown) either allows or blocks this flow so that the flow is selectable and controllable.
  • a second turbine device in the form of a Francis turbine 40 is provided at the penstock 36. When the gate is open, the Francis turbine 40 is acted upon by the flow of water from the upper lake 14 to the lower lake 12 and this causes rotation of the second blades and, consequently, output shaft of the Francis turbine 40. Therefore, tidal movement causes rotation of the output shafts of the Kaplan turbines 30 which in turn causes operation of each second pump 42. This operates the hydraulic motor 46 which causes the first pump 32 to transfer fresh water from the lower lake 12 to the upper lake 14. Water returning to the lower lake 12 from the upper lake 14 causes rotation of the output shaft of the Francis turbine 40.
  • the output of the Francis turbine 40 can be coupled to an electrical generator device (not shown). An energy generating cycle can be maintained continuously.
  • the hydraulic motor 46 and the hydraulic pump 42 are configured so that they increase the rotation speed of the first pump 32 relative to the Kaplan turbines 30.
  • the hydraulic pump 42 and hydraulic motor 46 may convert the output turbine shaft rotation speed of 450 RPM to 1800 RPM of the first pump 32 by varying the fluid displacement of the hydraulic pump and motor.
  • the hydraulic fluid compressed to high pressure creates heat, approx. 300 °F to 400°F. This heat can be extracted for additional uses.
  • a candidate site was selected at Big Water of Fleet Bay on the West Coast of Scotland.
  • the following is a hypothetical example of the design criteria used in adapting the renewable energy system of the invention to such a candidate location.
  • This site has an average predicted tide of 7 meters.
  • Hydraulic fluid pump 5,226hp at 450rpm at 1500psi
  • Flow of Waters of Fleet 3.553m3/sec add to outflow of tide 2 times per day or 12 hours.
  • the present invention provides many advantages.
  • the renewable energy system of the invention can be used to supply a predictable and reliable source of electricity to the national grid.
  • the system is relatively simple in design and dependable in operation.
  • the system is also relatively non-polluting as compared to other alternative energy sources.
  • the tidal energy source is more reliable than wave powered systems since it does not depend as heavily upon current weather conditions. Because the system is located in an estuary or other relatively sheltered location, the component parts can be made of lighter weight and non-corrosive materials than many of the prior art systems.

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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)
  • General Life Sciences & Earth Sciences (AREA)
  • Oceanography (AREA)
  • Other Liquid Machine Or Engine Such As Wave Power Use (AREA)

Abstract

L'invention concerne un système de capture d'énergie marémotrice (10) qui comprend: un réservoir de stockage de niveau inférieur (12) situé à une première hauteur au-dessus du niveau de la mer (100); un réservoir de stockage de niveau supérieur (14) situé à une seconde hauteur supérieure au-dessus du niveau de la mer; un premier dispositif de turbine (30) ayant des premières aubes de turbine et un premier arbre de sortie et situé au niveau ou autour du niveau de la mer dans un corps mobile d'eau, le premier dispositif de turbine (30) est conçu pour être sollicité par le mouvement du corps d'eau pour provoquer la rotation des premières aubes de turbine et du premier arbre de sortie; un premier dispositif de pompe (32) couplé à l'arbre de sortie et conçu pour pomper l'eau depuis le réservoir de stockage de niveau inférieur vers le réservoir de stockage de niveau supérieur (14); un second dispositif de turbine (40) ayant des secondes aubes de turbine et un second arbre de sortie et situé entre les seconds réservoirs de stockage de niveau inférieur et supérieur, le second dispositif de turbine (40) est conçu pour être sollicité par le flux d'eau provenant du réservoir de stockage de niveau supérieur (14) jusqu'au réservoir de stockage de niveau inférieur (12) pour provoquer la rotation des secondes aubes de turbine et de la seconde tige de sortie.
PCT/GB2018/052096 2017-07-26 2018-07-26 Système de capture d'énergie marémotrice Ceased WO2019021000A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB1712042.9A GB2564886A (en) 2017-07-26 2017-07-26 Tidal energy capturing system
GB1712042.9 2017-07-26

Publications (1)

Publication Number Publication Date
WO2019021000A1 true WO2019021000A1 (fr) 2019-01-31

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PCT/GB2018/052096 Ceased WO2019021000A1 (fr) 2017-07-26 2018-07-26 Système de capture d'énergie marémotrice

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WO (1) WO2019021000A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113738566A (zh) * 2021-09-14 2021-12-03 国网新源控股有限公司 一种基于抽水蓄能电站的过速保护与流量控制方法
WO2024092143A3 (fr) * 2022-10-27 2024-08-02 Gilbert John Sale Système de stockage d'énergie

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP4596865A1 (fr) * 2024-02-01 2025-08-06 Mathers Hydraulics Technologies Pty Ltd Système et procédé d'amplification, de stockage et de régénération de puissance utilisant des marées, des vagues et/ou du vent

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0048004A1 (fr) * 1980-09-16 1982-03-24 Bernhard Jöst Dispositif d'utilisation de l'energie de cours d'eau
US20120019004A1 (en) * 2010-07-20 2012-01-26 Rod Ekern Renewable Energy System
GB2507362A (en) * 2013-03-15 2014-04-30 Renewable Hydrocarbons Ltd Tidal generation and storage system with three tanks
US20150013327A1 (en) * 2012-02-01 2015-01-15 Laird Galen Bateham Hydroelectric power system and pump

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB158048A (en) * 1919-10-22 1921-01-24 George Hutchinson Improvements in systems for the utilisation of tidal energy

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0048004A1 (fr) * 1980-09-16 1982-03-24 Bernhard Jöst Dispositif d'utilisation de l'energie de cours d'eau
US20120019004A1 (en) * 2010-07-20 2012-01-26 Rod Ekern Renewable Energy System
US20150013327A1 (en) * 2012-02-01 2015-01-15 Laird Galen Bateham Hydroelectric power system and pump
GB2507362A (en) * 2013-03-15 2014-04-30 Renewable Hydrocarbons Ltd Tidal generation and storage system with three tanks

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113738566A (zh) * 2021-09-14 2021-12-03 国网新源控股有限公司 一种基于抽水蓄能电站的过速保护与流量控制方法
CN113738566B (zh) * 2021-09-14 2023-09-19 国网新源控股有限公司 一种基于抽水蓄能电站的过速保护与流量控制方法
WO2024092143A3 (fr) * 2022-10-27 2024-08-02 Gilbert John Sale Système de stockage d'énergie

Also Published As

Publication number Publication date
GB2564886A (en) 2019-01-30
GB201712042D0 (en) 2017-09-06

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