GB2496856A - Dome shaped wave energy reaction member - Google Patents

Dome shaped wave energy reaction member Download PDF

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Publication number
GB2496856A
GB2496856A GB1120101.9A GB201120101A GB2496856A GB 2496856 A GB2496856 A GB 2496856A GB 201120101 A GB201120101 A GB 201120101A GB 2496856 A GB2496856 A GB 2496856A
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United Kingdom
Prior art keywords
text
wave
water
inertia
forces
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Application number
GB1120101.9A
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GB201120101D0 (en
GB2496856B (en
Inventor
David Frederick Mann
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Individual
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Individual
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Priority to GB1120101.9A priority Critical patent/GB2496856B/en
Publication of GB201120101D0 publication Critical patent/GB201120101D0/en
Publication of GB2496856A publication Critical patent/GB2496856A/en
Application granted granted Critical
Publication of GB2496856B publication Critical patent/GB2496856B/en
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
    • F03B—MACHINES OR ENGINES FOR LIQUIDS
    • F03B13/00—Adaptations of machines or engines for special use; Combinations of machines or engines with driving or driven apparatus; Power stations or aggregates
    • F03B13/12—Adaptations of machines or engines for special use; Combinations of machines or engines with driving or driven apparatus; Power stations or aggregates characterised by using wave or tide energy
    • F03B13/14—Adaptations of machines or engines for special use; Combinations of machines or engines with driving or driven apparatus; Power stations or aggregates characterised by using wave or tide energy using wave energy
    • F03B13/16—Adaptations of machines or engines for special use; Combinations of machines or engines with driving or driven apparatus; Power stations or aggregates characterised by using wave or tide energy using wave energy using the relative movement between a wave-operated member, i.e. a "wom" and another member, i.e. a reaction member or "rem"
    • F03B13/20—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" wherein both members, i.e. wom and rem are movable relative to the sea bed or shore
    • 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
    • F03B13/141—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 with a static energy collector
    • F03B13/142—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 with a static energy collector which creates an oscillating water column
    • 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
    • F03B13/141—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 with a static energy collector
    • F03B13/144—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 with a static energy collector which lifts water above sea level
    • F03B13/145—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 with a static energy collector which lifts water above sea level for immediate use in an energy converter
    • 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
    • F03B13/24—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 to produce a flow of air, e.g. to drive an air turbine
    • 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
    • F05B2250/20—Geometry three-dimensional
    • F05B2250/26—Geometry three-dimensional paraboloidal
    • 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

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

A wave energy inertia device (reaction member) for a wave energy converter has a dome shape. The inclined dome surface alters the movement of impinging waves to the extent that the device, and a body of water enclosed within the device, become relatively static. There may be vertical and horizontal plates within the device and lying within this body of water to enable the device to resist forces acting on it. The dome may support relatively movable devices e.g. running on rails on the dome (figure 5) or inclined oscillating water columns (figure 6) which supply air to a turbine within the device.

Description

Wave Energy Inertia Device
Description
This invention relates to a device for use in wave energy conversion. A significant number of wave energy converters comprise two floating members that move relative to one another. The individual members are commonly referred to as the "wave operated member" and the "reaction member". In order to generate power by utilizing the relative movement between the two members, the "reaction member" must be capable of resisting the forces applied to it by the "wave operated member". This is difficult to achieve when the "reaction member" is floating with no rigid attachment to the sea bed.
The Inertia Device is a "reaction member" designed to address this probleni The device is dome shaped and presents a submerged convex surface to oncoming waves. It is circular in plan and encloses a body of water. The shape of the device deflects waves in such a way that the device, and the body of water it encloses, remains relatively static in relation to the wave movements surrounding them.
Incoming waves comprise a tapered envelope of moving water that extends to a certain depth below sea level. The water movement is greatest at the top of the wave envelope, at sea level, and progressively reduces with depth to zero at the foot of the envelope. The power in the wave is proportional to the water movement and hence greatest at the top of the wave envelope.
As this wave envelope approaches the device the first point of contact is at the lower level where the envelope meets the submerged lower edge of the dome. At this point the vertical angle of incidence between the enveIop and the surface of the dome is a small angle, i.e. the dome surface is slightly angled away from the wave envelope. Part of the water at this point is deflected upwards. As the wave envelope progresses forward the point of contact with the dome moves up the curved surface, the angle of incidence between the two becomes progressively larger and the upwards deflection of the wave becomes greater. The final point of contact is the top of the wave envelope, at sea level, where the wave energy is greatest and where the wave is deflected by the greatest amount. The effect of this process is to trip the wave so that it's movement becomes a sliding action rather than a slamming action as would be the case if the surface of the device was vertical. As a result the device is not substantially displaced by the impinging waves and the water enclosed by the device remains relatively static. The plates fonning the chambers inside the device lie within this water and anchor the device to it. The inertia of the enclosed water is transmitted through these plates to the device enabling it to resist the forces acting on it by "wave operated members".
An example of the device is described here by reference to the accompanying drawings.
The device is in the shape of a submerged cylinder surmounted by a partially submerged dome as shown in elevation in Figure 1. A vertical cross section through the device is shown in Figure 2. Horizontal cross sections A-A and B-B are shown in Figures 3 and 4 respectively. The positions of these cross sections are shown in Figure 2. Mean sea level is shown as "MSL" in Figures 1, 2, 5 and 6. A vertical cylindrical void I runs through the centre of the device and is open to the atmosphere at it's upper end and to the sea at it's lower end. Radial vertical bulkheads divide the interior space into radial chambers. A number of radial flooding chambers 2 are provided which are enclosed at the lower ends by horizontal annular plates at 3 and 6. The lower horizontal annular plate 6 is cantilevered beyond the main cylindrical body to provide additional resistance to movement. Vents are provided in the lower horizontal annular plate 6 to allow the chambers 2 to flood and further vents 12 are provided at the upper end of the chambers 2 to allow trapped air to escape and to equalize the pressure between the chambers 2 and the central void 1. A number of enclosed radial buoyancy tanks 4 are provided which are filled with compressed air to a variable level to allow the device to float. A number of enclosed radial dry chambers 5 are provided to house operating equipment such as pumps, valves and turbines.
Examples are given, in Figures 5 and 6, of two different ways in which the stability of device can be used in harnessing wave energy.
In Figure 5 a number of curved, floating "wave operated members" 7 are shaped so as to capture the maximum movement from incoming waves and perform oscillating movements. The members are free to run on wheels 9 within curved rails 8 attached to the surface of the dome. The relative movement between the "wave operated members" and the device is used to pump fluids through a fluid turbine to produce electrical power.
In Figure 6 a curved canopy 10 is attached over the dome and connected to it by radial bulkheads similar to those in Figure 3. The canopy 10 is curved to a greater radius than the dome and the space between these two surfaces is divided into a number of radial chambers 11 whose vertical and horizontal cross sections taper towards the centre. The open outer ends of these chambers face downwards and are below mean sea level. Wave action creates an oscillating water piston in each chamber 11 and the relative movement between the water pistons and the device compresses the air in the chambers. The compressed air drives air turbines to produce electrical power.

Claims (1)

  1. <claim-text>Claims 1 A device forming part of a wave energy converter, floating freely with no rigid attachment to the sea bed, which is shaped so that it, and the water enclosed within it, remains relatively static in relation to surrounding wave movements and is thereby able to provide resistance to forces applied to it by wave operated members.</claim-text> <claim-text>2 A device according to claim 1 where a partially submerged domed and cylindrically shaped outer surface deflects impinging waves thereby preventing wave forces being applied to the device and enabling the device, and a body of water enclosed within it, to remain relatively static.</claim-text> <claim-text>3. A device according to claims I and 2 where submerged bulkheads and other submerged surfaces inside the device transmit the inertia of the enclosed body of water to the device.</claim-text> <claim-text>4. A device according to claims 1,2 and 3 where the inertia of the device enables power to be generated by the relative movement between wave operated members and the device, 5. A device according to claims 1, 2, 3 and 4 where the forces from a number of wave operated members, oscillating freely within rails attached to the domed surface, are resisted by the inertia of the device to enable fluids to be pumped through fluid turbines producing electrical power.6. A device according to claims 1, 2, 3 and 4 where the forces from a number of wave generated water pistons, oscillating freely within chambers formed over the domed surthee, are resisted by the inertia of the device to enable air within the chambers to be compressed and driven through air turbines producing electrical power.</claim-text>
GB1120101.9A 2011-11-22 2011-11-22 Wave energy inertia device Active GB2496856B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1120101.9A GB2496856B (en) 2011-11-22 2011-11-22 Wave energy inertia device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1120101.9A GB2496856B (en) 2011-11-22 2011-11-22 Wave energy inertia device

Publications (3)

Publication Number Publication Date
GB201120101D0 GB201120101D0 (en) 2012-01-04
GB2496856A true GB2496856A (en) 2013-05-29
GB2496856B GB2496856B (en) 2017-11-01

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Family Applications (1)

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GB1120101.9A Active GB2496856B (en) 2011-11-22 2011-11-22 Wave energy inertia device

Country Status (1)

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GB (1) GB2496856B (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2016001688A3 (en) * 2014-07-03 2016-03-31 Mathclick Limited Apparatus for converting or absorbing energy from a moving body of water
WO2019090803A1 (en) * 2017-11-08 2019-05-16 大连理工大学 Oscillating water column and oscillating float combined wave energy conversion apparatus

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB167777A (en) * 1920-08-16 1922-11-13 Percy Alexander Charles Bates Improvements in and relating to the utilisation of the motion of waves
DE19504356A1 (en) * 1995-02-10 1996-08-14 Oejvind Boltz Multiple system wave energy converter for electricity generation
JP2006283648A (en) * 2005-03-31 2006-10-19 Taiyo Plant Kk Wave energy-using device
KR100814125B1 (en) * 2006-11-29 2008-03-14 한국해양연구원 Spiral reef shaped overflow wave generater
GB2461306A (en) * 2008-06-27 2009-12-30 Allen Charles Peter Cox Paddle driven wave energy converter
WO2010121816A2 (en) * 2009-04-24 2010-10-28 Voith Patent Gmbh Device for converting wave energy into an air flow and method for the production thereof
WO2011023840A1 (en) * 2009-08-25 2011-03-03 Metalúrgica Marina, S.A. Wave collector
CN101984251A (en) * 2010-12-06 2011-03-09 中国海洋大学 Wave energy generating set
US20110074160A1 (en) * 2008-06-02 2011-03-31 Sui Kwang Wave energy conversion plant

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB167777A (en) * 1920-08-16 1922-11-13 Percy Alexander Charles Bates Improvements in and relating to the utilisation of the motion of waves
DE19504356A1 (en) * 1995-02-10 1996-08-14 Oejvind Boltz Multiple system wave energy converter for electricity generation
JP2006283648A (en) * 2005-03-31 2006-10-19 Taiyo Plant Kk Wave energy-using device
KR100814125B1 (en) * 2006-11-29 2008-03-14 한국해양연구원 Spiral reef shaped overflow wave generater
US20110074160A1 (en) * 2008-06-02 2011-03-31 Sui Kwang Wave energy conversion plant
GB2461306A (en) * 2008-06-27 2009-12-30 Allen Charles Peter Cox Paddle driven wave energy converter
WO2010121816A2 (en) * 2009-04-24 2010-10-28 Voith Patent Gmbh Device for converting wave energy into an air flow and method for the production thereof
WO2011023840A1 (en) * 2009-08-25 2011-03-03 Metalúrgica Marina, S.A. Wave collector
CN101984251A (en) * 2010-12-06 2011-03-09 中国海洋大学 Wave energy generating set

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2016001688A3 (en) * 2014-07-03 2016-03-31 Mathclick Limited Apparatus for converting or absorbing energy from a moving body of water
JP2017520718A (en) * 2014-07-03 2017-07-27 ４０サウス エナジー イタリア エスアールエル A device for converting or absorbing energy from a moving body of water
WO2019090803A1 (en) * 2017-11-08 2019-05-16 大连理工大学 Oscillating water column and oscillating float combined wave energy conversion apparatus
US10844829B2 (en) 2017-11-08 2020-11-24 Dalian University Of Technology Oscillating water column-oscillating buoy combined wave energy converter

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Publication number Publication date
GB201120101D0 (en) 2012-01-04
GB2496856B (en) 2017-11-01

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