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WO2018150387A1 - Pompe à dépendance aux vagues - Google Patents

Pompe à dépendance aux vagues Download PDF

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Publication number
WO2018150387A1
WO2018150387A1 PCT/IB2018/051001 IB2018051001W WO2018150387A1 WO 2018150387 A1 WO2018150387 A1 WO 2018150387A1 IB 2018051001 W IB2018051001 W IB 2018051001W WO 2018150387 A1 WO2018150387 A1 WO 2018150387A1
Authority
WO
WIPO (PCT)
Prior art keywords
vane
wave
energy conversion
conversion device
absorbing
Prior art date
Application number
PCT/IB2018/051001
Other languages
English (en)
Inventor
Mpumzi Siphesihle SWANA
Original Assignee
Swana Mpumzi Siphesihle
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Swana Mpumzi Siphesihle filed Critical Swana Mpumzi Siphesihle
Publication of WO2018150387A1 publication Critical patent/WO2018150387A1/fr
Priority to ZA2019/04854A priority Critical patent/ZA201904854B/en

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
    • F03B—MACHINES OR ENGINES FOR LIQUIDS
    • F03B13/00—Adaptations of machines or engines for special use; Combinations of machines or engines with driving or driven apparatus; Power stations or aggregates
    • F03B13/12—Adaptations of machines or engines for special use; Combinations of machines or engines with driving or driven apparatus; Power stations or aggregates characterised by using wave or tide energy
    • F03B13/14—Adaptations of machines or engines for special use; Combinations of machines or engines with driving or driven apparatus; Power stations or aggregates characterised by using wave or tide energy using wave energy
    • 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
    • F03B13/1805—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 hinged to the rem
    • F03B13/181—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 hinged to the rem for limited rotation
    • F03B13/182—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 hinged to the rem for limited rotation with a to-and-fro movement
    • 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
    • F05B2250/00—Geometry
    • F05B2250/30—Arrangement of components
    • F05B2250/33—Arrangement of components symmetrical
    • 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

Definitions

  • the invention relates generally to energy conversion.
  • it relates to energy conversion from kinetic to electrical energy through use of an at least partially submerged energy conversion device which is powered by a renewable energy source in the form of ocean currents or waves.
  • wave energy conversion devices have been developed, mostly for the purposes of converting renewable kinetic or wave energy into a desirable form of energy such as electrical energy.
  • One such configuration makes use of a float positioned on the water surface which rises and falls with the ebb and flow of tides or incoming waves in order to displace an actuating arm or pump.
  • a different configuration includes one or more hydro-turbines which are rotated when currents pass through the turbines.
  • Another known configuration is in the form of a barrier which is positioned on the shoreline and pivotally displaced when waves impinge upon the barrier.
  • Drawbacks associated with the above configurations relate to poor or insufficient energy conversion and the fact that the equipment or components are susceptible to damage due to the wave action, foreign objects or corrosion etc.
  • US 7,023, 104 describes a wave energy conversion device for converting wave energy from wave motion in a body of water (the sea) to a pressurised fluid output which can be used for desalination purposes or for generation of electrical energy through use of hydro-turbines.
  • This particular device comprises: a stable platform which is secured to a seabed; at least one fluid pump, a proximal end of which is pivotally connected to the platform; and a submerged wave-absorbing panel which is pivotally connected to the platform and operatively extends vertically upward from the platform, a distal end of the fluid pump being connected to the panel such that wave energy of waves moving through the sea are absorbed by the panel which exhibits an oscillating motion in response to the ebb and flow of waves.
  • This oscillating motion is translated into reciprocating motion by the fluid pump which serves to pump sea water to a catchment area for further use.
  • the above configuration may work in certain instances with favourable ocean conditions, the Applicant has noticed that the above configuration is ineffective in certain conditions where undesirable circling or spiralling undercurrents are present proximate the ocean floor. For example, with the passage of time, these undercurrents gradually deposit sand, sediment or other foreign objects on the platform and against a base of the panel which obstructs the oscillating motion of the panel and prevents full range of motion which renders the operation of the pump ineffective.
  • the present invention aims, at least to some extent, to alleviate the drawbacks discussed above.
  • a wave energy conversion device which includes:
  • a support structure which includes a vane receiving formation which is operatively raised from an ocean floor and to which the wave-absorbing vane is pivotally connected in a configuration in which the wave-absorbing vane depends from the vane receiving formation and extends toward the ocean floor such that it is at least partially submerged in water and is configured to pivot relative to the support structure about a pivot axis, in oscillating fashion, in response to wave motion incident upon the wave-absorbing vane; and at least one fluid pump connected between the wave-absorbing vane and the vane receiving formation in order to translate pivotal displacement of the wave-absorbing vane into reciprocating pump action for pumping water.
  • the wave energy conversion device may include at least two fluid pumps, one either side of the wave-absorbing vane.
  • the wave energy conversion device may include a pair of fluid pumps connected to each major face of the vane.
  • the fluid pumps within each pair may be disposed toward opposing sides of the wave-absorbing vane.
  • Each fluid pump may be connected between the wave-absorbing vane and the vane receiving formation.
  • the wave energy conversion device may be double-acting in the sense that each time the vane is displaced fluid is pumped by at least one of the fluid pumps.
  • the device may include a plurality of wave-absorbing vanes pivotally connected to the support structure.
  • the vane receiving formation may include a pair of parallel, elongate beams or struts.
  • the support structure may include a frame to which the beams are connected and a plurality of legs which are connected to the frame and extend downwardly therefrom to support the frame in a raised position.
  • the wave-absorbing vane may include louvres defining a plurality of openings passing through the vane.
  • the wave-absorbing vane may be rectangular and may include a peripheral border.
  • the louvres may extend laterally between opposing sides of the border.
  • the louvres may be inclined with respect to a plane of the border of the wave-absorbing vane.
  • the fluid pumps may include a check valve at an inlet and a check valve at an outlet for regulating flow of fluid into and from the pump.
  • Each fluid pump may include a cylinder and a piston.
  • the cylinder may be pivotally secured to the vane receiving formation.
  • the piston may be pivotally connected to the vane.
  • the piston may be received within the cylinder in order to pump water.
  • Each fluid pump may include inlet and outlet one-way valves to facilitate pump action of the pump and suitable piping to convey pumped water to an elevated catchment area or reservoir.
  • the plane of the vane may pass through the pivot axis. Under influence of waves incident upon the vane, it may be configured to pivot back and forth about the pivot axis in a to and fro oscillating fashion.
  • the invention extends to a wave energy conversion plant which includes: at least one wave energy conversion device as described above wherein the wave-absorbing vane is at least partially submerged in water; a reservoir positioned at an elevated site, the fluid pump of the energy conversion device being in fluid flow communication with the reservoir such that water can be pumped to the reservoir by the fluid pump as a result of oscillating motion of the wave-absorbing vane induced by ocean waves, the reservoir being configured temporarily to store water; and
  • At least one hydro-turbine configured to generate electricity when the water stored in the reservoir is discharged therefrom over the hydro-turbine.
  • Figure 1 shows a three-dimensional view of a conceptual wave energy conversion plant which includes at least one wave energy conversion device in accordance with the invention
  • Figure 2 shows a side view of the plant of Figure 1 with a wave- absorbing vane in a first position
  • Figure 3 shows another side view of the plant of Figure 1 with the wave-absorbing vane in a second position
  • Figure 4 shows a longitudinal section through a fluid pump of the device in an extended position
  • Figure 5 shows the fluid pump of Figure 4 in a compressed position.
  • reference numeral 10 refers generally to a wave energy conversion plant which is configured to generate electrical energy from ocean waves. There has been an ever-increasing move toward generating electricity using renewable energy resources. One such renewable source of energy comes in the form of kinetic energy stored in ocean waves.
  • the wave energy conversion plant 10 includes a wave energy conversion device 1 1 in accordance with the invention.
  • the device 1 1 includes a single wave-absorbing vane 12 which is operatively at least partially submerged in water so that waves incident upon the vane 12 displace it back and forth, in oscillating fashion, as will be elaborated on here below.
  • the wave energy conversion device 1 1 further includes a support structure 13 which includes a vane receiving formation 15 to which the wave-absorbing vane 12 is pivotally connected or mounted.
  • the vane 12 operatively depends from the vane receiving formation 15 so that it can pivot relative to the vane receiving formation 15, and hence relative to the support structure 13 about a pivot axis X.
  • the support structure 13 further includes a rectangular frame 16 and a plurality of legs 17 which support the frame 16 and vane receiving formation 15 in a raised or elevated position above an ocean floor. To this end, the legs 17 extend downwardly toward the ocean floor from four corners of the frame 16.
  • the vane receiving formation 15 includes a pair of parallel, elongate beams or struts 18 which extend lengthwise between opposite ends of the frame 16.
  • the wave-absorbing vane 12 is substantially planar having opposing major faces and includes a rectangular peripheral border or casing 14 and a plurality of inclined louvres 20 which extend laterally between opposite sides of the border 14.
  • the louvres 20 define openings or passages through the vane 12.
  • a pair of two fluid pumps 22, each of which extends between the vane 12 and the vane receiving formation 15 at an inclined angle thereto, is connected to each face of the planar vane 12, on opposite sides of the border 14. Accordingly, the device 1 1 includes four fluid pumps 22 which are configured to pump water from the ocean to a reservoir 30 via suitable piping.
  • each fluid pump 22 comprises a hollow, circular cylindrical pump cylinder 23 which is pivotally connected to the strut 18 of the vane receiving formation 15 by way of a clevis fastener and a reciprocating piston 24 which is disposed within the cylinder 23 and protrudes therefrom.
  • a free end of the piston 24 is pivotally connected to the border 14 of the vane 12 by way of a clevis joint 26.
  • the piston 24 is configured to reciprocate within the cylinder 23 in order to pump water therefrom as the vane 12 moves to and fro.
  • Each cylinder 23 has an inlet check valve or oneway valve 27 at an inlet through which water can be drawn into a pump chamber 25 defined by the cylinder 23 and an outlet check valve or one-way valve 28 at an outlet through which water can be pumped from the pump chamber 25 under influence of the piston 24.
  • the valves 27, 28 control unidirectional flow of water through the cylinder 23 and chamber 25.
  • Each piston 24 has a head 29 disposed within the cylinder 23 which sealingly abuts an inner wall of the cylinder 23.
  • the wave energy conversion plant 10 includes the reservoir 30 which is mounted on top of the support structure 13 and is configured temporarily to hold water pumped from the fluid pumps 22.
  • a suction pipe 31 is connected to the inlet check valve 27 of each pump 22 and operatively hangs in the water to suck water into the pump chamber 25.
  • a discharge hose 32 is connected between the outlet check valve 28 and the reservoir 30 in order to convey water pumped from the pump chamber 25 to the reservoir 30.
  • the plant 10 further includes an electrical generator in the form of a water turbine 33 which generates electricity when water is discharged from the reservoir over the turbine via a discharge outlet 34.
  • a wave incident on the major face of the vane 12 will cause the vane 12 shown in Figure 2 to pivot to the right toward the position illustrated in Figure 3.
  • This movement displaces the pump 22 from its compressed position illustrated in Figure 5 to its extended position shown in Figure 4 which means the piston head 29 is axially outwardly displaced which draws water into the pump chamber 25 via the inlet check valve 27 as shown in Figure 4.
  • the wave current reverses and impinges upon the opposite major face of the vane 12, it pivots in the opposite direction (right to left in Figure 3) which causes the water retained in the chamber 25 of the left-hand side pump 22 to be pumped from the chamber 25 to the reservoir 30 via the outlet check valve 28 as the piston head 29 moves axially inward relative to the cylinder 23, as can be seen in Figure 5.
  • the device 1 1 is therefore double-acting in the sense that with each swaying motion of the vane 12, water is pumped from at least one pair of fluid pumps 22. It is to be appreciated that the vane 12 may be displaced from one side to the other up to 4 times per minute due to the ebb and flow of ocean waves or currents. Once a sufficient volume of water has accumulated within the reservoir 30, it can be discharged therefrom and released over the water turbine 33 to generate electricity in conventional fashion. The device 1 1 can also be used for desalination purposes.
  • a major advantage of the wave energy conversion plant 10 and device 1 1 in accordance with the invention over known prior art configurations is the fact that the wave-absorbing vane 12 is elevated or raised above, and spaced away from, the ocean floor which means sand and sediment cannot be deposited against the vane 12 and impede or prevent it from oscillating back and forth.
  • This benefit is achieved by having the vane 12 depend downwardly from the support structure 13 instead of the vane protruding vertically upward from the ocean floor or from a platform built on the ocean floor. Deposited sand, sediment or other foreign bodies can therefore not impede movement of the vane 12.
  • Wave currents are also more directional and hence directly incident upon the major faces of the vane 12 at a level spaced from the ocean floor.

Landscapes

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

Abstract

L'invention concerne une installation de conversion de l'énergie des vagues (10) pour convertir le mouvement des vagues de l'océan en énergie électrique. L'installation comprend un dispositif de conversion d'énergie des vagues (11), un réservoir (30) et un générateur électrique (33). Le dispositif (11) comprend au moins une aube d'absorption de vague (12), et une structure de support (13) qui comprend une formation de réception d'aube (15) qui est surélevée de manière fonctionnelle à partir du plancher océanique et auquel l'aube (12) est reliée de manière pivotante de telle sorte qu'elle dépend de la formation (15) et s'étend vers le plancher océanique. L'aube pivote par rapport à la structure de support (13) autour d'un axe de pivot X, de manière oscillante, en réponse à un mouvement de vague incident sur elle (12). Le dispositif (11) comprend en outre quatre pompes à fluide (22) reliées à l'aube (12) afin de translater le déplacement pivotant de celle-ci (12) en une action de pompe alternative pour pomper de l'eau.
PCT/IB2018/051001 2017-02-20 2018-02-19 Pompe à dépendance aux vagues WO2018150387A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
ZA2019/04854A ZA201904854B (en) 2017-02-20 2019-07-24 A depending wave pump

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ZA201701236 2017-02-20
ZA2017/01236 2017-02-20

Publications (1)

Publication Number Publication Date
WO2018150387A1 true WO2018150387A1 (fr) 2018-08-23

Family

ID=63169202

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/IB2018/051001 WO2018150387A1 (fr) 2017-02-20 2018-02-19 Pompe à dépendance aux vagues

Country Status (2)

Country Link
WO (1) WO2018150387A1 (fr)
ZA (1) ZA201904854B (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10480482B1 (en) * 2017-11-27 2019-11-19 Gary Ross Biomorphic inshore wave energy converter

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE244640C (fr) *
US4490621A (en) * 1982-04-14 1984-12-25 Muroran Institute Of Technology Method and apparatus for generating electric power by waves
US20110298215A1 (en) * 2010-06-04 2011-12-08 Hein Wille Near shore wec system
WO2015063667A1 (fr) * 2013-11-04 2015-05-07 Xhabija Blerina Générateur d'énergie exploitant des mouvements de marées/de vagues

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE244640C (fr) *
US4490621A (en) * 1982-04-14 1984-12-25 Muroran Institute Of Technology Method and apparatus for generating electric power by waves
US20110298215A1 (en) * 2010-06-04 2011-12-08 Hein Wille Near shore wec system
WO2015063667A1 (fr) * 2013-11-04 2015-05-07 Xhabija Blerina Générateur d'énergie exploitant des mouvements de marées/de vagues

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10480482B1 (en) * 2017-11-27 2019-11-19 Gary Ross Biomorphic inshore wave energy converter

Also Published As

Publication number Publication date
ZA201904854B (en) 2020-05-27

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