EP0868607A1 - Wave energy generator including an oscillating gate and a piston pump - Google Patents
Wave energy generator including an oscillating gate and a piston pumpInfo
- Publication number
- EP0868607A1 EP0868607A1 EP97911429A EP97911429A EP0868607A1 EP 0868607 A1 EP0868607 A1 EP 0868607A1 EP 97911429 A EP97911429 A EP 97911429A EP 97911429 A EP97911429 A EP 97911429A EP 0868607 A1 EP0868607 A1 EP 0868607A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- sluice
- valve
- wave
- oscillating
- pump
- 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- Withdrawn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
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
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B17/00—Pumps characterised by combination with, or adaptation to, specific driving engines or motors
-
- 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 present invention concerns a marine generator consisting of a structure that exploits the energy of the waves for the production of electric energy, for pumping water and for the compression of refrigerating gases.
- the present invention allows many applications, and in particular:
- the pump may be used for raising the water into a basin existing or to be realized at a height superior to the sea level, and for using the position energy for developping electric energy, by means of a conventional hydroelectric system;
- the suction/pressing pump placed on the shore nearby a food-stuffs refrigeration installation may be used as a compressor in the Carnot refrigeration process.
- the application of the system according to the present invention may be installed near those coasts where the steapness of the sea ground is rather uniform and not to high and without unevennesses, for avoiding dangerous reflected waves, at an optimal distance near an area of breakers or between the breaker area and the shore:
- the breaking may be forced by means of an artificial inclination of the ground (slope) out of reinforced concrete.
- the wave that arrives near the machine is in a precarious stability condition and therefore when it breakes with the sluice-valve that intercepts it, it gives away its energy (kinetic + potential).
- E is the total enery of the wave
- Ec is the kinetic energy
- Ep the potential energy
- a is the density of the sea water
- H is the vertical distance between the crest and the trough of the wave
- L is the length of the wave.
- the impact of the arriving wave with the intercepting element (the sluice-valve) generates a thrust that can make rotate said sluice-valve and consequently can operate the piston of the pump, compressing the water contained therein.
- This thrust is applied at about 2/3 of the base hinge (centre of gravity of the speed triangle), i.e.
- the sluice-valve must raise from the average sea level of an amount equal to the average height of the wave, so as to intercept it all and catch all its potential energy.
- the pressure may be chosen in such a way as to overcome the geodetic prevalence and the losses in the pressing piping, by simply varying appropriately the diameter of the cylinder.
- the flow of the raised water may be increased by coupling in parallel a plurality of machines by means of the suction/pressing collectors.
- Fresh water is used in a closed circuit - i.e. the water coming out from the turbine is introduced into the suction collector - so as not to use sea water in the pumping circuit: infact, the sea water would quickly damage the pump as well as the respective hydraulic turbine.
- Figure 1 shows a scheme of a vertical section of a module that makes up the structure of the marine ge- nerator with an oscillating sluice-valve and a piston pump according to the present invention, with a sluice-valve and pumps placed in front of the waves.
- Figure 2 shows a scheme of a vertical section of a module of the structure with a conventional hydroelectric system with an airlock inserted in the sending collector for adjusting the water motion.
- Figure 3 shows a scheme of a vertical section of a variant of artificial inclinations of the ground for inducing the breaking.
- Figure 4 shows a scheme of a section of a module of the structure, applied to the evacuation of water from surfaces at a level below the sea level.
- Figure 5 shows a perspective, exemplificated view of a pumping system consisting of a plurality of single machines with a conventional hydroelectric system.
- the marine generator with an oscillating sluice-valve and a piston pump mainly consists of an oscillating sluice-valve 1 and of a suction/pressing pump 1 2 with simple effect.
- the oscillating sluice-valve with its plane surface in front of the waves and preferably V-shaped on the other side so as to oppose the minimum resistance to movement inside the water during the active compressione phase, and placed orthogonally to the waves' motion and nearly perpendicularly to the sea ground, is provided at its base with a hinge 3 and is fastened in a concrete block 21 for allowing its oscillating movement.
- the suction/pressing pump 1 resting on a reinforced concrete base 21 by means of an appropriately shaped metal support 20, consists of a cylinder 1 3 and of a piston 1 1 having in the end thereof a rod 1 0 a sliding hinge 5 to be inserted inside the guide 4 fastened to the sluice-valve 1 ; a single sluice-valve is to be used with a couple of pumps 12 for balancing the stress transmitted by the waves, as said valve is provided with two guides 4 placed at the sides of said valve at about 2/3 from the base of the same, where the sliding hinges 5, placed at the ends of rods 1 0 of pistons 1 1 , are to be inserted, thus conferring to said sluice-valve a greater solidity.
- the support 20 carrying said pump 1 2 as well a s hinge 3, onto which said sluice-valve 1 is hinged, are f a - stened to the same reinforced concrete base 21 built is the sea ground.
- the two pipes 1 6 and 1 7 coming from the two valves 14 and 1 5 are to be connected to the respective sending connector 1 8 ad suction connector 19, thus allowing the formation of pumping systems in parallel for increasing the whole installation.
- the airlock CA is to be inserted in the sending collector 1 8 for adjusting the water motion in the pipings: otherwise, they will feel the effects of the variable motion of piston 1 1 .
- a cylindrical helical spring 2 is to be inserted in correspondence to the rotation axis of the sluice- valve 1 ; said spring is loaded during the active compression phase of the pump, i.e. during the impact of the wave, and is unloaded during the wait of a new arriving wave, bringing the sluice-valve back into its original position.
- the marine generator is provided with a safety device for preventing damages to the pump as well as to the sluice-valve, especially during particularly h eavy sea-storms.
- a damping spring 8 is arranged outside cylinder 1 3 and another one inside piston 9 , for reducing the tearing stress due to the return of the sluice-valve.
- a stopping system is provided so that the sluice-valve gets blocked in its greatest excursion, showing the waves that breake onto it with the smallest stress, its minimum surface, by means of a pin 6 arranged on the sluice-valve 1 that fits into a hooking 7 placed onto the support 20 of the pump.
- the marine generator according to the present invention is coupled, as shown in figures 2, 3 and 5, to a conventional hydroelectric system consisting of an upper reservoir SS, of a turbine-generator group TG, of a lower reservoir SI and of an airlock CA, for adjusting the water motion in the sending pipe.
- the same comprises - as shown in figure 3 - a reinforced concrete structure 23 that can force the breaking of the wave by means of the artificial reduction of the ground.
- FIG 4 shows the application of the marine generator according to the present invention for the evacuation of water from surfaces below the sea level: the pump sucks the water from the drainages 24 arranged close up to the outer breakwater below the sea level, through the suction collector 1 9, and discharges the water directly into the sea through the sending pipe 16.
- the structure realized according to the present invention shows the following advantages: - it allows to be placed near the shore in shallow waters; - it helps an easy maintenance, as it is near t h e shore;
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
ITRM960708 | 1996-10-21 | ||
IT96RM000708A IT1286351B1 (it) | 1996-10-21 | 1996-10-21 | Generatore elettrico marino a paratoia oscillante e pompa a pistone |
PCT/IT1997/000258 WO1998017911A1 (en) | 1996-10-21 | 1997-10-21 | Wave energy generator including an oscillating gate and a piston pump |
Publications (1)
Publication Number | Publication Date |
---|---|
EP0868607A1 true EP0868607A1 (en) | 1998-10-07 |
Family
ID=11404476
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP97911429A Withdrawn EP0868607A1 (en) | 1996-10-21 | 1997-10-21 | Wave energy generator including an oscillating gate and a piston pump |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP0868607A1 (it) |
IT (1) | IT1286351B1 (it) |
WO (1) | WO1998017911A1 (it) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2472093A (en) * | 2009-07-24 | 2011-01-26 | Aquamarine Power Ltd | Wave energy device with movement assistance at end positions of driving member |
Families Citing this family (20)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FI20012086A0 (fi) * | 2001-10-26 | 2001-10-26 | Top Shark Oy | Menetelmä ja laitteisto aaltoenergian hyödyntämiseksi |
GB0505906D0 (en) | 2005-03-23 | 2005-04-27 | Aquamarine Power Ltd | Apparatus and control system for generating power from wave energy |
US8110937B2 (en) | 2005-08-12 | 2012-02-07 | Biopower Systems Pty. Ltd. | Wave energy capturing device |
PT2140134E (pt) | 2007-03-14 | 2014-09-10 | Langlee Wave Power As | Central ondomotriz |
WO2008138336A2 (en) * | 2007-05-10 | 2008-11-20 | Lars Barthold Nielsen | Apparatus for exploiting reciprocating motion of water |
DK176883B1 (da) | 2008-09-19 | 2010-02-22 | Wavepiston Aps | Apparat til udvinding af bølgeenergi |
AU2011318469A1 (en) | 2010-10-21 | 2013-06-06 | Arthur Robert Williams | Full-water-column surge-type wave-energy converter |
US9222527B2 (en) * | 2010-12-12 | 2015-12-29 | Frank Louis Stromotich | High efficiency infinitely variable fluid power transformer |
CN102062040B (zh) * | 2010-12-20 | 2013-05-01 | 国家海洋局杭州海洋工程勘测设计研究中心 | 具有灾难应对功能的波浪能发电系统 |
CN102654098B (zh) * | 2012-04-20 | 2014-02-05 | 上海电机学院 | 波浪能双发电机发电装置 |
CN102705145A (zh) * | 2012-06-01 | 2012-10-03 | 国家海洋技术中心 | 适应小波浪发电的波浪能发电系统 |
CN103033009A (zh) * | 2012-12-12 | 2013-04-10 | 李宏江 | 海浪压水取冷制冰节电方法及其装置 |
KR101272094B1 (ko) * | 2012-12-14 | 2013-06-07 | 문병학 | 조류펌프 및 이를 이용한 발전시스템 |
CN104061115B (zh) * | 2014-07-03 | 2018-12-11 | 国家海洋技术中心 | 一种漂浮式多浮子波浪能发电装置 |
CN106321337B (zh) * | 2016-09-18 | 2019-04-30 | 河海大学 | 一种连续波浪冲击能转化装置 |
CN106224157A (zh) * | 2016-09-19 | 2016-12-14 | 华南理工大学 | 一种封闭型三维拉绳式波浪蓄能装置及发电装置 |
DK179431B1 (en) | 2016-12-13 | 2018-07-12 | Wavepiston A/S | A power take off system suitable for a wave power device |
EP3596336B1 (en) * | 2017-03-13 | 2022-03-02 | AW-Energy Oy | Arrangement and method for enhancing conditions of various types in a coastal area |
CN107061128B (zh) * | 2017-03-14 | 2023-06-20 | 王良风 | 海浪发电装置 |
CN111188720A (zh) * | 2020-03-11 | 2020-05-22 | 荆门创佳机械科技有限公司 | 摆板冲击式波浪能发电装置 |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB1024536A (en) * | 1964-09-25 | 1966-03-30 | Sidney Rosenberg | Marine powered generator |
US4384456A (en) * | 1980-12-15 | 1983-05-24 | Boros Ladislav J | Dynamic breakwater and wave energy recovery and conversion system |
JPH04358769A (ja) * | 1991-04-13 | 1992-12-11 | Nakajima Kosan Kk | 波力ポンプ |
-
1996
- 1996-10-21 IT IT96RM000708A patent/IT1286351B1/it active IP Right Grant
-
1997
- 1997-10-21 WO PCT/IT1997/000258 patent/WO1998017911A1/en not_active Application Discontinuation
- 1997-10-21 EP EP97911429A patent/EP0868607A1/en not_active Withdrawn
Non-Patent Citations (1)
Title |
---|
See references of WO9817911A1 * |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2472093A (en) * | 2009-07-24 | 2011-01-26 | Aquamarine Power Ltd | Wave energy device with movement assistance at end positions of driving member |
GB2472093B (en) * | 2009-07-24 | 2011-11-09 | Aquamarine Power Ltd | Wave energy conversion apparatus and method |
Also Published As
Publication number | Publication date |
---|---|
WO1998017911A1 (en) | 1998-04-30 |
IT1286351B1 (it) | 1998-07-08 |
ITRM960708A1 (it) | 1998-04-21 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
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AK | Designated contracting states |
Kind code of ref document: A1 Designated state(s): DE DK FR GB IE NL PT |
|
17P | Request for examination filed |
Effective date: 19981020 |
|
17Q | First examination report despatched |
Effective date: 19991111 |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN |
|
18D | Application deemed to be withdrawn |
Effective date: 20000322 |