WO2004043777A1 - Mooring system for offshore fish production - Google Patents
Mooring system for offshore fish production Download PDFInfo
- Publication number
- WO2004043777A1 WO2004043777A1 PCT/IL2003/000935 IL0300935W WO2004043777A1 WO 2004043777 A1 WO2004043777 A1 WO 2004043777A1 IL 0300935 W IL0300935 W IL 0300935W WO 2004043777 A1 WO2004043777 A1 WO 2004043777A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- fish
- cages
- water
- sea
- front frame
- Prior art date
Links
- 241000251468 Actinopterygii Species 0.000 title claims abstract description 47
- 238000004519 manufacturing process Methods 0.000 title description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 24
- 238000010276 construction Methods 0.000 claims abstract description 11
- 238000005086 pumping Methods 0.000 claims abstract description 5
- 239000013535 sea water Substances 0.000 claims description 5
- 239000002184 metal Substances 0.000 claims description 4
- 238000000034 method Methods 0.000 claims description 3
- 230000007935 neutral effect Effects 0.000 claims 1
- 238000009360 aquaculture Methods 0.000 abstract 1
- 244000144974 aquaculture Species 0.000 abstract 1
- 238000004873 anchoring Methods 0.000 description 6
- 230000001419 dependent effect Effects 0.000 description 4
- 239000002245 particle Substances 0.000 description 4
- 239000000835 fiber Substances 0.000 description 3
- 230000033001 locomotion Effects 0.000 description 3
- 230000001133 acceleration Effects 0.000 description 2
- 230000002411 adverse Effects 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 238000007667 floating Methods 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- 241000238424 Crustacea Species 0.000 description 1
- 241001465754 Metazoa Species 0.000 description 1
- 239000004698 Polyethylene Substances 0.000 description 1
- 230000006837 decompression Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 230000009189 diving Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 229920002457 flexible plastic Polymers 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 235000013305 food Nutrition 0.000 description 1
- 231100001261 hazardous Toxicity 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000009533 lab test Methods 0.000 description 1
- 238000009372 pisciculture Methods 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- -1 polyethylene Polymers 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 235000014102 seafood Nutrition 0.000 description 1
- 238000001228 spectrum Methods 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
- 239000003643 water by type Substances 0.000 description 1
Classifications
-
- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01K—ANIMAL HUSBANDRY; AVICULTURE; APICULTURE; PISCICULTURE; FISHING; REARING OR BREEDING ANIMALS, NOT OTHERWISE PROVIDED FOR; NEW BREEDS OF ANIMALS
- A01K61/00—Culture of aquatic animals
- A01K61/60—Floating cultivation devices, e.g. rafts or floating fish-farms
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING
- B63B21/00—Tying-up; Shifting, towing, or pushing equipment; Anchoring
- B63B21/50—Anchoring arrangements or methods for special vessels, e.g. for floating drilling platforms or dredgers
-
- 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
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A40/00—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production
- Y02A40/80—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production in fisheries management
- Y02A40/81—Aquaculture, e.g. of fish
Definitions
- the present invention relates to offshore marine - culture. More specifically the invention relates to submergible and flexible fish-cage technology designed to solve the key needs of marine-culture on open seas.
- waves apply the prominent environmental load onto offshore installations.
- Ocean waves are observed as lateral waves that propagate over the free surface - the surface that separates the water from the atmosphere.
- waves also induce orbital currents and accelerate water particles deep below the free surface.
- the diameter of the circular motion of particles in the sea surface is equal to the wave height - vertical height between wave trough and wave crest.
- the orbit diameter decreases further down the deeper water, and at a depth of about half a wavelength, motion is almost completely vanished.
- the parameters of an extreme wave, with an average return period of about 50 years, in the Mediterranean Sea at the shores of Israel, are as follows: Significant wave height (average height of the one-third highest waves in a sample) - about 8 meters. Maximum single wave height - about 16 meters.
- Peak period namely the wave period at which the wave spectrum (a function describes the energy-frequency distribution) has a maximum - about 16 seconds. Wavelength corresponds to peak period - about 400 meters.
- the orbital velocity induced by waves is significantly greater than the speed of currents.
- currents are an important factor in the determination of anchoring load applied by cages because of their slow variation in time relative to the fast variation of wave-induced velocities.
- Flexible anchoring (long ropes) allows decreasing wave influence on anchoring loads since the water displacements induced by waves are limited. Loads applied by currents are not dependent upon the rigidity of anchoring, hence must be reacted by the anchoring system.
- the current force exerted on sea structures is a drag force that can be assessed through empirical equations. In general the drag force is proportional to the seawater density, to the current speed squared, and to the area of the cross-section of the element, perpendicular to the flow.
- the ratio of the drag force to the product of these three parameters is defined as a drag coefficient.
- the drag coefficient is geometrically dependent on the body, and is usually found in experiments. More precisely, the drag coefficient is also weakly dependent upon speed, so the force is not exactly proportional to the squared speed of the current.
- Velocity of water in waves is not constant speed and the water particles accelerate and decelerate.
- an inertial force will also act upon a submerged body in waves.
- the inertial forces For bodies that are small in relation to wavelength, one can assess the inertial forces by a simple engineering formula, wherein the inertia force is proportional to the acceleration of water particles to the seawater density, and to the immersed volume. The ratio of the inertia force to the product of these three parameters is defined as the inertia coefficient, which is dependent upon the geometric shape of the body. The inertia coefficient may be interpreted as the mass of water whose acceleration was prevented due to the presence of a body, and is also termed hydrodynamic mass. Wave force applied to small bodies relative to wavelength can be estimated by superposition of drag and inertia forces on the elements that comprise the structure.
- Cages for growing fish are known in the art. They are typically placed in calm fiords or bays that present no extreme sea conditions, hazardous to the cages and facilitate convenient maintenance. As the fiord is contaminated by the fish cages and industrial pollution the cages can be moved to a less contaminated site in the bay or fiord.
- cage builders developed cages for near - shore locations and calm waters. Most cages are built to resist wave energy up to specific level, most of these systems are multiple mooring systems. There are attempts, conducted in various countries, such as the USA and European countries to introduce diving systems that can operate in 35-meter sea depth, to avoid mechanical stress of a heavy sea. When a storm occurs, pulleys are used to lift or submerge the cages.
- each cage has its own mooring system. In case of short storm notice or technical problem with one of the many pulleys the system fail. It is impossible to operate the pulleys in rough sea conditions.
- Biological aspect - The aim of the cages is to offer a suitable environment for growing fish and with this in mind the cages must be properly designed.
- Environmental aspect - To preserve the natural environment any negative impact, the farm may present, must be minimized.
- Mechanical aspect - Safe anchoring and structural integrity of an offshore cage system must be ensured along with biological and operational cost effective considerations. Current forces acting upon nets is discussed in:"Current Forces on Cage and
- Fig. 1 is a schematic isometric description of a fish cage system of the invention, indicating some features
- Fig. 2 is a schematic top view describing stabilizing elements of the fish cage system of the invention
- Fig. 3 is a schematic isometric description of the fish cage system of the invention showing the rope system;
- Fig. 4 is a schematic side view description of the operating and submersion positions of a system of the invention.
- Fig. 5A is a schematic description of a submerged fish cage to which indicating buoy has been connected;
- Fig. 5B is a schematic description of a refloated fish cage to which indicating the surfacing of the secondary float.
- a cage system for fish culture is provided.
- fish relates to all kinds of sea dwelling animals such as fish, sea food, crustaceans used as food.
- the system of the invention is single point mooring device in which the fish cages, typically 2 - 5 are arranged serially, fastened to a flexible structure well fitted for absorbing heavy sea energy.
- the system is connected to the anchor via flexible mooring rope, and a rope tension moderating buoy, allowing free movement in the water, as limited by the length of the rope and other physical obstacles.
- Front frame (FF) 22 is a metal construction, preferably a hollow tube, connects
- ballasts hang down from the fish cages.
- top - side view 2A the system 30 holds five fish cages such as fish
- the FF 38 is tied via a mooring rope 40 to
- a rope tension moderating buoy 42 In Fig. 2B another variety of the system is shown, in which longitudinal pipes 46 and 48 are disposed, the functionality of which will be explained later, and in addition longitudinal ropes 50 are connected to the fish cage hangers (not shown) for holding the fish cages together and in connection to the FF. In Fig. 3 to which reference is now made, longitudinal ropes 60 are disposed at the top side of the fish cage 62, and a
- second set of ropes 64 is disposed at the bottom side of the fish cages.
- rope set is tied to the FF 38 and to the fish growing cages.
- the longitudinal pipes are not drawn.
- rope in this respect is a generalized term meaning any flexible connecting chord such as mad from fibers, metal fibers, plastic fibers or chains.
- the fish cage system of the invention is relatively stable owing to mechanical features.
- Each fish cage, including its ballasts is substantially neutrally with respect to its own buoyancy. And the whole system is stabilized by a weight associated with the front frame.
- the fish cage system of the invention includes several sets of hanging ballasts.
- a first set are the ballast hanging from the fish cages. These ballasts are flexible preferably constructed of metal chains hanging from the nets.
- Another set of hanging ballasts hang from the FF, and another optional set hang from the longitudinal pipes downwards.
- the system of fish cages are submerged to a depth of few tens of meters, in preparation for a storm. The mechanical energy absorbed by the system is substantially smaller at such depths than at the sea surface.
- the FF being a tube
- the longitudinal pipes if present are also made to be filled with water.
- the cage system can sink. The dimensions of these constructions, and the material from which they are constructed, must be calculated to permit the submergence of the system upon filling of the constructions with water.
- Float 70 is connected directly to anchor 72 to mark the system generally.
- Rope tension moderating buoy 74 connects to the cage system through a rope, which
- hoses are connected to valves in the construction elements containing water, typically the FF and the longitudinal pipes, and air is pumped in, pushing water out of theses elements.
- long hoses are connected to the appropriate opening in the relevant construction elements, prior to the submergence, and each loose end designated by a buoy, they can be found easily to be connected to the air source.
- the Cage system of the invention can withstand substantially adverse open sea conditions.
- the system of the invention is operational in sea water in which water depth is 35-80 meter (or more). It is resistant and can take storms of rough sea as it can be conveniently submerged to escape from the storm. When the system is submerged, all is left to be seen on the sea surface is a small floats or a few buoys, that designates the location of the system when sea is calm again. Mooring circle of each system to the neighboring system is calculated in the same manners as boat mooring.
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Environmental Sciences (AREA)
- Marine Sciences & Fisheries (AREA)
- Zoology (AREA)
- Animal Husbandry (AREA)
- Biodiversity & Conservation Biology (AREA)
- Farming Of Fish And Shellfish (AREA)
- Meat, Egg Or Seafood Products (AREA)
- Mechanical Means For Catching Fish (AREA)
Abstract
Description
Claims
Priority Applications (10)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP03811049A EP1567410B1 (en) | 2002-11-10 | 2003-11-10 | Mooring system for offshore fish production |
AU2003276669A AU2003276669A1 (en) | 2002-11-10 | 2003-11-10 | Mooring system for offshore fish production |
US10/543,847 US20060130728A1 (en) | 2002-11-10 | 2003-11-10 | Mooring system for offshore fish production |
AT03811049T ATE499279T1 (en) | 2002-11-10 | 2003-11-10 | ANCHORING SYSTEM FOR OFFSHORE FISH PRODUCTION |
CA002505793A CA2505793A1 (en) | 2002-11-10 | 2003-11-10 | Mooring system for offshore fish production |
BR0315479-3A BR0315479A (en) | 2002-11-10 | 2003-11-10 | Open sea fish breeding system and methods for re-floating and balancing a submerged open sea fish cage system |
DE60336164T DE60336164D1 (en) | 2002-11-10 | 2003-11-10 | ANCHORING SYSTEM FOR OFFSHORE FISH PRODUCTION |
IL168522A IL168522A (en) | 2002-11-10 | 2005-05-10 | Mooring system for offshore fish production |
NO20052789A NO20052789L (en) | 2002-11-10 | 2005-06-09 | Anchoring system for offshore fishing production |
AU2011200741A AU2011200741A1 (en) | 2002-11-10 | 2011-02-22 | Mooring System for Offshore Fish Production |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
IL15272202A IL152722A0 (en) | 2002-11-10 | 2002-11-10 | Flexible and submersible single point mooring system for offshore fish farming |
IL152722 | 2002-11-10 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2004043777A1 true WO2004043777A1 (en) | 2004-05-27 |
Family
ID=32310092
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/IL2003/000935 WO2004043777A1 (en) | 2002-11-10 | 2003-11-10 | Mooring system for offshore fish production |
Country Status (12)
Country | Link |
---|---|
US (1) | US20060130728A1 (en) |
EP (1) | EP1567410B1 (en) |
AT (1) | ATE499279T1 (en) |
AU (2) | AU2003276669A1 (en) |
BR (1) | BR0315479A (en) |
CA (1) | CA2505793A1 (en) |
DE (1) | DE60336164D1 (en) |
ES (1) | ES2361668T3 (en) |
IL (2) | IL152722A0 (en) |
NO (1) | NO20052789L (en) |
WO (1) | WO2004043777A1 (en) |
ZA (1) | ZA200504532B (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2473648A (en) * | 2009-09-21 | 2011-03-23 | Roy Erez | An open water fish farming system |
CN106538442A (en) * | 2016-11-03 | 2017-03-29 | 孙亚非 | A kind of anti-violent typhoon aquaculture net cage of flexible gravity structure floats formula |
US9980469B2 (en) | 2012-05-08 | 2018-05-29 | Sea Control Holdings Ltd. | Offshore aquaculture system |
Families Citing this family (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2014072788A1 (en) * | 2012-11-06 | 2014-05-15 | Maya Fish Pte. Ltd. | System and method for fish farming |
EP3190878B1 (en) * | 2014-09-22 | 2022-07-20 | Forever Oceans Corporation | Mooring system and method |
GB201418625D0 (en) * | 2014-10-20 | 2014-12-03 | Seafarm Products As | Submersible cage for aquaculture |
WO2017051334A1 (en) | 2015-09-22 | 2017-03-30 | Aljadix Ag | Apparatus and process for sea surface microalgae cultivation |
AU2016368691B2 (en) * | 2015-12-08 | 2021-11-11 | Norman BOYLE | Oyster farming apparatus and methods |
CN109864022A (en) * | 2017-10-18 | 2019-06-11 | 哈尔滨工程大学 | A kind of netted modularization sea fishing ground platform |
CO2021011000A1 (en) * | 2021-08-20 | 2021-08-30 | Azure Fisheries Colombia S A S | Submersible containment system for biomass cultivation |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4257350A (en) | 1977-11-14 | 1981-03-24 | Francis Devin | Method and device for practicing marine aquaculture |
US4380213A (en) * | 1979-02-21 | 1983-04-19 | National Research Development Corporation | Rotatable fish cage |
US4957064A (en) * | 1987-03-13 | 1990-09-18 | Nippon Kokan Kabushiki Kaisha | Offshore fish cage for farming fish |
US5172649A (en) * | 1990-08-21 | 1992-12-22 | Pisciculture Marine De Monaco | Device for breeding fish in the open sea |
US5251571A (en) * | 1990-09-04 | 1993-10-12 | Innovation & Development Partners Inc./Idp Inc. | Submersible cage system for culturing aquatic animals |
Family Cites Families (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
SE435671B (en) * | 1983-12-19 | 1984-10-15 | Viking Fish Ab | FISH CULTURE EQUIPMENT INCLUDING ATMINSTONE A BOX OF ADJUSTABLE DEPARTURE AND AIR CLOCK |
FR2564695B1 (en) * | 1984-05-28 | 1987-04-03 | Dieppe Sous Traitants Arrondis | AQUACULTURE FACILITY AT SEA |
CA1253406A (en) * | 1985-06-14 | 1989-05-02 | David E. Whiffin | Method and apparatus for rearing fish in natural waters |
NO300002B1 (en) * | 1995-02-10 | 1997-03-17 | Charles Kaarstad | Device for lowering and raising aquaculture cages |
US5762024A (en) * | 1996-04-17 | 1998-06-09 | David E. Meilahn | Aquaculture system |
RU2105471C1 (en) * | 1996-08-12 | 1998-02-27 | Леонид Юрьевич Бугров | Submersible fish tank |
NO311062B1 (en) * | 1999-02-12 | 2001-10-08 | Refa As | Device for flat bottom cages |
US6481378B1 (en) * | 2000-09-11 | 2002-11-19 | Fishfarm Tech Ltd. | Fish farming system and method |
-
2002
- 2002-11-10 IL IL15272202A patent/IL152722A0/en unknown
-
2003
- 2003-11-10 US US10/543,847 patent/US20060130728A1/en not_active Abandoned
- 2003-11-10 BR BR0315479-3A patent/BR0315479A/en not_active Application Discontinuation
- 2003-11-10 AT AT03811049T patent/ATE499279T1/en not_active IP Right Cessation
- 2003-11-10 DE DE60336164T patent/DE60336164D1/en not_active Expired - Lifetime
- 2003-11-10 CA CA002505793A patent/CA2505793A1/en not_active Abandoned
- 2003-11-10 EP EP03811049A patent/EP1567410B1/en not_active Expired - Lifetime
- 2003-11-10 ES ES03811049T patent/ES2361668T3/en not_active Expired - Lifetime
- 2003-11-10 WO PCT/IL2003/000935 patent/WO2004043777A1/en not_active Application Discontinuation
- 2003-11-10 AU AU2003276669A patent/AU2003276669A1/en not_active Abandoned
-
2005
- 2005-05-10 IL IL168522A patent/IL168522A/en active IP Right Revival
- 2005-06-09 NO NO20052789A patent/NO20052789L/en not_active Application Discontinuation
-
2006
- 2006-01-16 ZA ZA200504532A patent/ZA200504532B/en unknown
-
2011
- 2011-02-22 AU AU2011200741A patent/AU2011200741A1/en not_active Abandoned
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4257350A (en) | 1977-11-14 | 1981-03-24 | Francis Devin | Method and device for practicing marine aquaculture |
US4380213A (en) * | 1979-02-21 | 1983-04-19 | National Research Development Corporation | Rotatable fish cage |
US4957064A (en) * | 1987-03-13 | 1990-09-18 | Nippon Kokan Kabushiki Kaisha | Offshore fish cage for farming fish |
US5172649A (en) * | 1990-08-21 | 1992-12-22 | Pisciculture Marine De Monaco | Device for breeding fish in the open sea |
US5251571A (en) * | 1990-09-04 | 1993-10-12 | Innovation & Development Partners Inc./Idp Inc. | Submersible cage system for culturing aquatic animals |
Non-Patent Citations (1)
Title |
---|
JAN V. AARSEN; GEIR LLAND; HARARD RUDI: "Current Forces on Cage and Net Deflection", ENGINEERING OF OFFSHORE FISH FARMING, GLASGOW, October 1990 (1990-10-01) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2473648A (en) * | 2009-09-21 | 2011-03-23 | Roy Erez | An open water fish farming system |
US9980469B2 (en) | 2012-05-08 | 2018-05-29 | Sea Control Holdings Ltd. | Offshore aquaculture system |
CN106538442A (en) * | 2016-11-03 | 2017-03-29 | 孙亚非 | A kind of anti-violent typhoon aquaculture net cage of flexible gravity structure floats formula |
Also Published As
Publication number | Publication date |
---|---|
IL168522A (en) | 2011-01-31 |
EP1567410A1 (en) | 2005-08-31 |
EP1567410B1 (en) | 2011-02-23 |
NO20052789L (en) | 2005-06-09 |
EP1567410A4 (en) | 2008-07-09 |
US20060130728A1 (en) | 2006-06-22 |
ES2361668T3 (en) | 2011-06-21 |
IL152722A0 (en) | 2004-02-08 |
AU2003276669A1 (en) | 2004-06-03 |
CA2505793A1 (en) | 2004-05-27 |
DE60336164D1 (en) | 2011-04-07 |
AU2011200741A1 (en) | 2011-03-10 |
BR0315479A (en) | 2005-09-20 |
ZA200504532B (en) | 2006-03-29 |
ATE499279T1 (en) | 2011-03-15 |
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