GB2091815A - Generating utilisable power from water waves - Google Patents
Generating utilisable power from water waves Download PDFInfo
- Publication number
- GB2091815A GB2091815A GB8102452A GB8102452A GB2091815A GB 2091815 A GB2091815 A GB 2091815A GB 8102452 A GB8102452 A GB 8102452A GB 8102452 A GB8102452 A GB 8102452A GB 2091815 A GB2091815 A GB 2091815A
- Authority
- GB
- United Kingdom
- Prior art keywords
- piezo
- electric
- shaft
- energy
- water
- 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.)
- Granted
Links
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 15
- 230000033001 locomotion Effects 0.000 claims abstract description 21
- 230000001360 synchronised effect Effects 0.000 claims description 3
- 230000005611 electricity Effects 0.000 claims description 2
- 230000002093 peripheral effect Effects 0.000 claims description 2
- 238000009434 installation Methods 0.000 description 6
- 239000002775 capsule Substances 0.000 description 4
- 239000012530 fluid Substances 0.000 description 4
- 230000005540 biological transmission Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000005684 electric field Effects 0.000 description 1
- 239000011554 ferrofluid Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
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
- F03B13/1815—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 an up-and-down movement
-
- 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
Apparatus for location in or on water particularly the sea, has relatively movable parts actuated by the waves to cause relative movement between them and piezo-electric devices connected between the parts to cause them to be strained by the relative movement and to generate electrical energy thereby The apparatus may comprise relatively movable floats 30, 31, or a series of louvres pivotally supported by a structure secured on the sea bed, Figures 1 to 3 (not shown). Means are provided for synchronising the output of the piezo-electric devices with the voltage of a supply grid, Figures 4A, 4B (not shown). <IMAGE>
Description
SPECIFICATION
Energy transducers
This invention relates to the utilisation of water waves as a power source.
There have been numerous proposaisfortapping the energy of sea waves, and many of those proposals have entailed practical means energised by wave motion for causing relative movement in equipment carried in or on the sea and for deriving power from that relative movement. So far however no economic proposal has been advanced for transferring that power from the off-shore location of the equipment to the shore in a readily usable form. The methods of power transmission suggested in the past have entailed equipment of such complexity and expense that wave power has still to receive commercial application.
In the present invention, piezo-electric devices are utilised as transducers to convert wave energy into electrical energy. The electrical energy derived from the piezo-electric devices can then be transmitted by cable or otherwise from the off-shore installation to the shore.
In one form of the invention, there is provided, for generating utilisable power from the energy of water waves, the combination of an installation in or on the water having relative moving parts activated by the waves, and piezo-electric devices operatively connected between those parts so as to be subject to strain on the occurrence of relative movement and to generate electrical energy thereby.
The invention will be more readily understood by way of example from the following description of wave power installations in accordance therewith, reference being made to the accompanying drawings, in which
Figure 1 is a perspective view of an installation,
Figures 2 and 3 are respectively an end view of one of the generators of Figure 1 and part-sectional side view thereof,
Figure 4A is a section on the line A-A of Figure 3,
Figure 4B schematically illustrates part of the generator in greater detail, and
Figures 5to 8show a second form of generator, in perspective, in plan view, in part-sectional side view and in end view, respectively.
Each generator of the installation shown in Figures 1 to 4, comprises a louvred paddle having louvres 13 inclined to the vertical. The paddle is attached to two stub shafts 14which are carried in half-bearing supports 15 mounted on a base plate 16, which is secured on the sea-bed. The generator, shown at 17 in Figure 1, is arranged with its paddle 12 approximately normal to the predominant direction of movement of the sea waves. The installation consists of a line of such generators arranged approximately parallel to shore.
In each generator, the equipment for converting the energy of the waves transmitted to the paddle 12 consists of a pair of piezo-electric devices. Thus, as shown, a torsional mass 20 having a forked lower end is mounted between the two stub shafts 14 by means of flexible torsion tubes 21. The forked lower end of the mass 20 is constituted by tines 22 located on opposite sides of an anvil 23 which is secured to the base plate 16 and extends upwardly therefrom.
Each tine 22 carries a hydraulic capsule and a piezo-electric element 24, which is arranged to project inwardly beyond the tine 22 on which it is carried.
The anvil 23 and the tines 22 are shown schematically in Figure 4B, in which each piezo-electric element 24 is represented as being located between one of the tines 22 and one of two hydraulic capsules 25, the pistons 26 of which are carried by the anvil 23. The hydraulic capsules 25 are interconnected by a pipe 27 which includes a valve 28 for controlling the flow rate. Thus, the fluid may be an electroviscous fluid when the flow rate is controlled by an electric field controlled by a field-applying device 28A; or, the fluid may be a ferro-fluid, when the device 28A applies a magnetic field to the pipe 27.
The piezeo-electric elements 24 are connected through a rectifier 29 to the device 28A and to cables 45 to the shore. The grid voltage represented by generator 46 is connected between the elements 24.
The valve 28A thus allows fluid to pass through the pipe only when there is sufficient electrical pressure across it; that occurs when the sum of the voltages provided by the elements 24 and the grid 46 reach a certain level, positive or negative. In this way the output from the elements 24 is synchronised exactly with the grid voltage and so long as the grid voltage continues to trigger item 28A the spring mass system will oscillate at grid frequency as the strain energy is gradually drawn from the flexible shafts 21 by displacement of the hydraulic cylinders in one direction or the other. The parcel of energy stored in the flexible shafts are gradually fed to the grid over a time period of the order of seconds and unless replaced by a further wave in the interim become quiescent for a further interval of time. Other paddles make their contributions as and when they can.The energy parcel could also be latched back for use at another time if appropriate.
The generator illustrated in Figures 5 to 8, comprises a pair of rafts 30,31 which are hinged together by a pin 32, which is arranged approximately at right angles to the predominant direction of movement of the waves. The hinging movement of the rafts resulting from the wave motion is converted into electrical energy by means of the equipment shown in detail in Figures 6 to 8.
The raft carries two bearings 33 in which is journalled a shaft 34 arranged parallel to the pin 32; shaft 34 carries a pair of torsional masses 35 and is connected to the other shaft 31 by arms 36 which are splined to the shaft and by connected, pivoted, links 37. Shaft 34 also carries at its centre a piezo-electric capsule 38, the outer cylindrical surface of which is secured against movement to a ring 40 secured to a platform 41 on the raft 30 and enclosed within a casing 42 having rotary seals through which shaft 34 passes.
As the rafts 30, 31 pivotally move relative to one another, the motion is transmitted to shaft 34 through the links 37. The movement is resisted by the piezo-electric device 38 which is accordingly torsionally stressed and generates electric current which can be synchronised with the grid voltage and transmitted to the shore, in a manner analogous to that illustrated in Figure 4B.
CLAIMS (Filed 25 Jan 1982)
1. Apparatus for location in or on water to generate utilisable power from the energy waves present in the water, said apparatus having relatively movable parts which can be actuated by the waves to produce relative movementtherebetween and piezo-electric devices operatively connected between these parts so as to be subject to strain on the occurence of relative movement to generate electric al energy thereby.
2. Apparatus as claimed in claim 1, in which the relatively movable parts include a base for securemenu to the bed of the sea or lake and a paddle pivoted on the base and movable by the waves.
3. Apparatus as claimed in claim 2, in which the paddle is pivoted buy a pair of stub shafts mounted in bearings on the base and a body is supported by torsion means connected to the stub shafts, whereby the body is displaceable with the paddle.
4. Apparatus as claimed in claim 3, in which at
least one piezo-electric device is mounted between the body and a fixed anvil on the base.
5. Apparatus as claimed in claim 3, in which the
body has a pair of portions arranged on opposite
sides of a fixed anvil on the base and piezo-electric
devices are mounted between the anvil and the
respective portions.
6. Apparatus as claimed in claim 3,4 or 5, in
which the torsion means comprise flexible torsion
tubes arranged in line with the stub shafts.
7. Apparatus as claimed in claim 1, in which the
relatively movable parts comprise a pair of rafts
arranged to float on the water hinged together, such
that there can be relative pivotal movement between
them, a shaft rotatably mounted on one of said rafts
and connected to the other raft, such that relative
pivotal movement between the rafts serves to rotate
the shaft, and the piezo-electric device is fixed to the
shaft for rotation therewith and it is held against
rotation by said one shaft.
8. Apparatus as claimed in claim 7, in which the
piezo-electric device is of annular form, is mounted
on said shaft and its outer peripheral surface is
secured against movement by a surrounding ring
secured to the raft.
9. Apparatus as claimed in any preceding claim,
including means for causing the piezo-electric de
vices to generate electrical energy in synchronism
with an alternating supply at power frequency.
10. Apparatus as claimed in claim 9, for causing
the piezo-electric devices to be subject to strain and
generate electricity at power frequency.
11. Apparatus as claimed in claim 9 or 10, as
appended to claim 3, in which hydraulic means
permit the piezo-electric devices to be subjected to
strain by energy stored in the torsion means in
synchronism with an electrical supply at power
frequency.
12. Apparatus as claimed in claim 5, in which respective hydraulic piston-cylinder devices are positioned between said anvil and said portions of the body, the cylinders of said devices being interconnected hydraulically through valve means which is operable between open and closed conditions at the frequency of an electrical supply connected thereto.
13. Apparatus for location in or on water to generate utilisable power from the energy of waves present in the water and substantially as hereinbefore described with reference to the accompanying drawings.
**WARNING** end of DESC field may overlap start of CLMS **.
Claims (13)
1. Apparatus for location in or on water to generate utilisable power from the energy waves present in the water, said apparatus having relatively movable parts which can be actuated by the waves to produce relative movementtherebetween and piezo-electric devices operatively connected between these parts so as to be subject to strain on the occurence of relative movement to generate electric al energy thereby.
2. Apparatus as claimed in claim 1, in which the relatively movable parts include a base for securemenu to the bed of the sea or lake and a paddle pivoted on the base and movable by the waves.
3. Apparatus as claimed in claim 2, in which the paddle is pivoted buy a pair of stub shafts mounted in bearings on the base and a body is supported by torsion means connected to the stub shafts, whereby the body is displaceable with the paddle.
4. Apparatus as claimed in claim 3, in which at
least one piezo-electric device is mounted between the body and a fixed anvil on the base.
5. Apparatus as claimed in claim 3, in which the
body has a pair of portions arranged on opposite
sides of a fixed anvil on the base and piezo-electric
devices are mounted between the anvil and the
respective portions.
6. Apparatus as claimed in claim 3,4 or 5, in
which the torsion means comprise flexible torsion
tubes arranged in line with the stub shafts.
7. Apparatus as claimed in claim 1, in which the
relatively movable parts comprise a pair of rafts
arranged to float on the water hinged together, such
that there can be relative pivotal movement between
them, a shaft rotatably mounted on one of said rafts
and connected to the other raft, such that relative
pivotal movement between the rafts serves to rotate
the shaft, and the piezo-electric device is fixed to the
shaft for rotation therewith and it is held against
rotation by said one shaft.
8. Apparatus as claimed in claim 7, in which the
piezo-electric device is of annular form, is mounted
on said shaft and its outer peripheral surface is
secured against movement by a surrounding ring
secured to the raft.
9. Apparatus as claimed in any preceding claim,
including means for causing the piezo-electric de
vices to generate electrical energy in synchronism
with an alternating supply at power frequency.
10. Apparatus as claimed in claim 9, for causing
the piezo-electric devices to be subject to strain and
generate electricity at power frequency.
11. Apparatus as claimed in claim 9 or 10, as
appended to claim 3, in which hydraulic means
permit the piezo-electric devices to be subjected to
strain by energy stored in the torsion means in
synchronism with an electrical supply at power
frequency.
12. Apparatus as claimed in claim 5, in which respective hydraulic piston-cylinder devices are positioned between said anvil and said portions of the body, the cylinders of said devices being interconnected hydraulically through valve means which is operable between open and closed conditions at the frequency of an electrical supply connected thereto.
13. Apparatus for location in or on water to generate utilisable power from the energy of waves present in the water and substantially as hereinbefore described with reference to the accompanying drawings.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB8102452A GB2091815B (en) | 1981-01-27 | 1981-01-27 | Generating utilisable power from water waves |
| JP57012507A JPS57143172A (en) | 1981-01-27 | 1982-01-27 | Energy transducer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB8102452A GB2091815B (en) | 1981-01-27 | 1981-01-27 | Generating utilisable power from water waves |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| GB2091815A true GB2091815A (en) | 1982-08-04 |
| GB2091815B GB2091815B (en) | 1985-06-19 |
Family
ID=10519266
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB8102452A Expired GB2091815B (en) | 1981-01-27 | 1981-01-27 | Generating utilisable power from water waves |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JPS57143172A (en) |
| GB (1) | GB2091815B (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2008004893A1 (en) * | 2006-07-07 | 2008-01-10 | Hoegmoe Joergen | A wave power apparatus and use of the apparatus as an emergency power genarator |
| EP1913204A1 (en) * | 2005-08-12 | 2008-04-23 | Biopower Systems Pty. Ltd. | A wave energy capturing device |
| WO2009088311A2 (en) * | 2008-01-10 | 2009-07-16 | Martifer Energia, Equipamentos Para Energia, S.A. | Device for wave energy extraction |
| FR3029241A1 (en) * | 2014-12-01 | 2016-06-03 | Gilles Grosso | APPARATUS FOR CONVERTING HOT ENERGY IN ELECTRICAL ENERGY |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4685296A (en) * | 1986-07-21 | 1987-08-11 | Burns Joseph R | Ocean wave energy conversion using piezoelectric material members |
| US7632041B2 (en) * | 2007-04-25 | 2009-12-15 | Single Buoy Moorings, Inc. | Wave power generator systems |
| KR101038103B1 (en) | 2008-06-05 | 2011-06-01 | 김변수 | wave energy converter |
| US8120195B2 (en) * | 2008-07-23 | 2012-02-21 | Single Buoy Moorings, Inc. | Wave energy converter |
-
1981
- 1981-01-27 GB GB8102452A patent/GB2091815B/en not_active Expired
-
1982
- 1982-01-27 JP JP57012507A patent/JPS57143172A/en active Pending
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1913204A1 (en) * | 2005-08-12 | 2008-04-23 | Biopower Systems Pty. Ltd. | A wave energy capturing device |
| EP1913204A4 (en) * | 2005-08-12 | 2011-06-08 | Biopower Systems Pty Ltd | A wave energy capturing device |
| WO2008004893A1 (en) * | 2006-07-07 | 2008-01-10 | Hoegmoe Joergen | A wave power apparatus and use of the apparatus as an emergency power genarator |
| EP2041428A1 (en) * | 2006-07-07 | 2009-04-01 | Jørgen Høgmoe | A wave power apparatus and use of the apparatus as an emergency power genarator |
| CN101490409B (en) * | 2006-07-07 | 2012-11-28 | 约恩·赫格默 | A wave power apparatus and use of the apparatus as an emergency power genarator |
| US8358025B2 (en) | 2006-07-07 | 2013-01-22 | Hoegmoe Joergen | Wave actuated power generation apparatus and method of use |
| EP2041428A4 (en) * | 2006-07-07 | 2013-02-27 | Joergen Hoegmoe | A wave power apparatus and use of the apparatus as an emergency power genarator |
| WO2009088311A2 (en) * | 2008-01-10 | 2009-07-16 | Martifer Energia, Equipamentos Para Energia, S.A. | Device for wave energy extraction |
| WO2009088311A3 (en) * | 2008-01-10 | 2010-07-22 | Martifer Energia, Equipamentos Para Energia, S.A. | Device for wave energy extraction |
| FR3029241A1 (en) * | 2014-12-01 | 2016-06-03 | Gilles Grosso | APPARATUS FOR CONVERTING HOT ENERGY IN ELECTRICAL ENERGY |
| WO2016087757A1 (en) * | 2014-12-01 | 2016-06-09 | Gilles Grosso | Apparatus for converting wave energy into electrical energy |
| US10113529B2 (en) | 2014-12-01 | 2018-10-30 | Gilles Grosso | Apparatus for converting wave energy into electrical energy |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS57143172A (en) | 1982-09-04 |
| GB2091815B (en) | 1985-06-19 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PCNP | Patent ceased through non-payment of renewal fee |