GB2535490A - Parametric pendulum wave energy converter - Google Patents
Parametric pendulum wave energy converter Download PDFInfo
- Publication number
- GB2535490A GB2535490A GB1502664.4A GB201502664A GB2535490A GB 2535490 A GB2535490 A GB 2535490A GB 201502664 A GB201502664 A GB 201502664A GB 2535490 A GB2535490 A GB 2535490A
- Authority
- GB
- United Kingdom
- Prior art keywords
- pendulum
- ramp
- buoy
- wave energy
- energy converter
- 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.)
- Withdrawn
Links
- 230000005611 electricity Effects 0.000 abstract description 4
- 230000005284 excitation Effects 0.000 abstract 1
- 239000002184 metal Substances 0.000 abstract 1
- 229910000831 Steel Inorganic materials 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 230000003534 oscillatory effect Effects 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
-
- 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
- F03B13/144—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
-
- 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 converter for capturing wave energy comprises an anchored or floating ramp. A buoy, may move along the ramps when acted on by the incident motion of waves and an n pendulum is mounted inside the buoy. The buoys motion along the ramp provides a parametric excitation to the pendulum that rotates around its pivot point. The other side of the pendulum shaft is connected to a device which converts the rotational motion to electricity. The pendulum has a plurality of arms which have a mass located at the end of the arm. The arms and the mass may be made of metal. A flywheel may be provided on the shaft to increase the inertia of the system. Limiters or stops may be provided to prevent the buoy coming off the ramp. The buoy may be guided by two rails located on the ramp, Fig 2.
Description
Provisional Patent Application Parametric pendulum wave energy converter 1 Description of the invention 1.1 Summary of the invention The invention is WI abA to wave energy converters.
The device belongs to the attenuator type, facing the incident waves and comprises a half-submerged, rectangular in the rotational plane, ramp (Fig 1) with angle 3, which is either rigidly fixed to the sea bed or by a mooring line. The typically values for angle 8 are between 10° and 30°. The angles can be controlled by mooring lines or a separate hydraulic mechanism.
The buoy (Fig 1) has three sections, the top and the bottom ones are waterproof. The middle section has a platform with a. sliding mechanism, allowing the buoy to slide along the ramp under the action of incident waves. A shaft connects a N-pendulinn and an electrical generator. The N-pendulum is a device that has N arms connected to the same hub, planted onto the shaft. Number of arms N may vary depending on the mean wave frequency at the current location, but typically it may be between 1 and 5 (Fig 2). Each arm, made of steel or aluminum, has a large mass, made of steel or lead, located at a given distance from the hub. Each arm has a mechanism to adjust the distance of the mass from the hub, so that the N-pendulum natural frequency can be properly adjusted. Due to the buoy motion along the ramp the pendulum will be excited parametrically. Properly adjusting the pendulum's parameters will make the pendulum have the rotational motion in the ramp plane. The moment of inertia of the sysbun will &Tends on the nn ass phand on en.ch nrTII and the square distance from the hub, therefore the larger the distances and the heavier the mass the more energy can be generated.
The large inertia helps to overcome small fluctuations from irregular waves. The inertia may be increased by adding a flywheel to the front or hack side of the shaft. When all the distances to all ill aSSCS are equal the device is in balance, no rotational motion and therefore no electricity generation will happen. This configuration can also he used to deactivate the device to service it. 'the back side of the shaft is connected to sonic device to generate electricity from the rotational motion of the shaft. To avoid damage to the proposed invention clue to high waves the amplitude limiters will he installed inside the ramp slides to prevent the buoy slide off the ramp.
The invention uses the property of the parametrically excited system, which can become unstable, under a certain conditions, and its oscillatory motion becomes rotational. Thus, the distances to the lumped mass of each ann are the parameters to adjust for varying wave characteristics. The dynamics of the proposed device is described by the following equation of motion: (J2 (1) 0" -70' -sin' A cos (en). sin = 0, f.4 - , where A* is the amplitude along the ramp, so that A* = A/sin3m with A -the incident wave height.
1.2 Figures Figure (Fig 1) shows the side 2D view of the proposed invention. The buoy, sketch by a circle, contains the N-pendulum on the top, connected to the device to generate electricity, shown as a square box, through a shaft. Figure (Fig 2) demonstrates 3D view of the proposed invention. Two black lines along the top side of the ramp indicates two rails for the buoy sliding along the ramp. Fig 3 shows design of N-pendulum when N=3 ctri-pendulum).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1502664.4A GB2535490A (en) | 2015-02-17 | 2015-02-17 | Parametric pendulum wave energy converter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1502664.4A GB2535490A (en) | 2015-02-17 | 2015-02-17 | Parametric pendulum wave energy converter |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| GB201502664D0 GB201502664D0 (en) | 2015-04-01 |
| GB2535490A true GB2535490A (en) | 2016-08-24 |
Family
ID=52781756
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB1502664.4A Withdrawn GB2535490A (en) | 2015-02-17 | 2015-02-17 | Parametric pendulum wave energy converter |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB2535490A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10570876B1 (en) * | 2018-07-03 | 2020-02-25 | The United States Of America As Represented By The Secretary Of The Navy | Resonant wave energy harvesting device |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1996016270A1 (en) * | 1994-11-18 | 1996-05-30 | Vera Gamini Samarasinghe | Wave energy machine |
| CN102384007B (en) * | 2010-08-31 | 2013-12-11 | 上海海洋大学 | Floating type ratchet wave-energy power generation device |
-
2015
- 2015-02-17 GB GB1502664.4A patent/GB2535490A/en not_active Withdrawn
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1996016270A1 (en) * | 1994-11-18 | 1996-05-30 | Vera Gamini Samarasinghe | Wave energy machine |
| CN102384007B (en) * | 2010-08-31 | 2013-12-11 | 上海海洋大学 | Floating type ratchet wave-energy power generation device |
Non-Patent Citations (1)
| Title |
|---|
| YURCHENKO et al, Dynamics of the N-pendulum and its application to a wave energy converter concept', International Journal of Dynamics and Control, 2013, Vol 1 Issue 4, pp 290-299. Published 29/10/2013 Available online at: * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10570876B1 (en) * | 2018-07-03 | 2020-02-25 | The United States Of America As Represented By The Secretary Of The Navy | Resonant wave energy harvesting device |
Also Published As
| Publication number | Publication date |
|---|---|
| GB201502664D0 (en) | 2015-04-01 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| KR102046671B1 (en) | Systems and methods for improved water rotors | |
| US20140203564A1 (en) | Platform for generating electricity from flowing fluid using generally prolate turbine | |
| US8084873B2 (en) | Induced surface flow wave energy converter | |
| AU2011227345A1 (en) | Wave-energy converter | |
| CN103221682A (en) | Systems and methods for renewable electricity production using wave energy | |
| KR20190067796A (en) | Wave energy converter | |
| US20150091304A1 (en) | Energy-capturing floating breakwater | |
| US20110278848A1 (en) | Wave Energy Converting Assembly | |
| US10920739B2 (en) | Wave-power system | |
| US20120019003A1 (en) | Ocean Current-Based Hydroelectric Power Generation System | |
| JP5875722B2 (en) | Wave power generator and mooring system for power generation | |
| JP4998813B1 (en) | Wave and hydro power generation method using rectifying plate and float | |
| KR20200035948A (en) | Wave generator | |
| US12215665B2 (en) | Assembly for transferring wave energy to an energy converter | |
| GB2535490A (en) | Parametric pendulum wave energy converter | |
| FR3094418B1 (en) | Wave propulsion and energy conversion device | |
| WO2015153061A3 (en) | Energy conversion system for ocean surface waves | |
| GB2425154A (en) | Wave powered turbine | |
| US8282338B2 (en) | Underwater generator | |
| GB2544008A (en) | Turbine technology and offshore power plants for general focusing, increase and conversion of kinetic ocean energy | |
| WO2016195600A1 (en) | Wave energy converter | |
| WO2012082497A3 (en) | Device for generating electricity from ocean waves | |
| AU2018202718A1 (en) | Wave Energy Converter | |
| GB2481435A (en) | Oscillating water column with adjustable wave controlling plate | |
| Narayan et al. | Experimental studies on a pendulor wave energy extractor in a wave channel |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| WAP | Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1) |