WO2009115657A2 - Procede et dispositif de captation d'eau douce sous-marine - Google Patents
Procede et dispositif de captation d'eau douce sous-marine Download PDFInfo
- Publication number
- WO2009115657A2 WO2009115657A2 PCT/FR2009/000076 FR2009000076W WO2009115657A2 WO 2009115657 A2 WO2009115657 A2 WO 2009115657A2 FR 2009000076 W FR2009000076 W FR 2009000076W WO 2009115657 A2 WO2009115657 A2 WO 2009115657A2
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- water
- interface
- sensor
- depth
- fresh water
- Prior art date
Links
Classifications
-
- E—FIXED CONSTRUCTIONS
- E03—WATER SUPPLY; SEWERAGE
- E03B—INSTALLATIONS OR METHODS FOR OBTAINING, COLLECTING, OR DISTRIBUTING WATER
- E03B3/00—Methods or installations for obtaining or collecting drinking water or tap water
- E03B3/06—Methods or installations for obtaining or collecting drinking water or tap water from underground
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
- A61P35/00—Antineoplastic agents
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/01—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells specially adapted for obtaining from underwater installations
- E21B43/0122—Collecting oil or the like from a submerged leakage
Definitions
- the present invention relates to a method and a device for capturing freshwater underwater. It concerns, in particular, the catchment of fresh water coming from submarine resurgences of freshwater source of karstic networks. lie karst is a domain of limestone rocks with numerous communicating cavities created by the dissolution of limestone by carbonic acid from precipitation waters, charged with carbon dioxide (CO 2 ). All these cavities form a karstic network, the lower part of which constitutes important reservoirs of fresh water.
- CO 2 carbon dioxide
- karsts especially those around the Mediterranean, have often been reduced by several tens or even hundreds of meters depending on the location, so that their basic level may now be Below sea level. It is known that freshwater springs from karstic domains flow under the sea. Freshwater with a lower density than salt water rises to the surface of the sea.
- French patent no. FR 2 701 974 describes a submerged construction, comprising a concave portion directed downwards and covering the source, the fresh water remaining trapped in the upper part of said cavity due to its density which is lower than that of the water of This construction remains open in its lower part so as to let escape the overflow and in particular the sea water, leaving at the same time the free karst system and taking the fresh water at the top of the construction by the intermediate of a variable flow pumping system.
- the pumping device is slaved to sensors that allow to keep in real time a flow rate slightly lower than the flow rate of the source. This device allows the removal of fresh water without the existing balance being disturbed and without inducing disturbances in the operation of the karst system, facilitating laminar flow which avoids mixing with seawater.
- the document FR 2,785,001 describes a device whose object is an improvement that allows a significant simplification of the capture system by implementing an impervious surface, preferably flexible, which isolates the resurgence, anchored to the sea floor and reaching the surface. where it is held by a floating dam, allowing the venting device to be vented.
- the device also comprises a system of valves to the lower part of the membrane allowing salt water to escape; fresh water is taken by pumps installed on a floating device on the inner surface of the dam.
- the document FR 2 795 109 proposes a flexible envelope forming a bell above a source of freshwater underwater.
- a salinity sensor is provided so that the mouth of the pump sucks in fresh water.
- the lighter source of fresh water, lying below the heavier salt water mixes these two types of water.
- the water thus pumped therefore requires a desalination treatment that is practically as complex and expensive as that of seawater.
- the present invention aims to meet these disadvantages.
- the present invention provides a device for collecting water from at least one source of freshwater underwater, characterized in that it comprises:
- a servo-control means adapted to control the flow rate of at least one pump adapted to pump fresh water above said interface, as a function of said state of said interface, said servo-control means being adapted to maintain the depth said interface below the mouth of at least one said source of fresh water.
- the interface depending on the state of the interface, for example its depth or turbulence which cause a mixture of fresh water and salt water, more or less water pump.
- the more the interface is subject to turbulence the more the depth of the interface is increased so that the fresh water brought by the sources is not likely to be mixed with salt water because of these turbulence.
- the quantity of water pumped represents the quantity of water. fresh water brought by these sources.
- the fresh water from each of the freshwater source mouths above the interface is unlikely to be mixed with salt water.
- the state sensor of said interface comprises a depth sensor adapted to determine the depth of said interface and the means servo-control is adapted to enslave the-depth of said interface by controlling the flow of at least one pump according to said depth.
- the state sensor of said interface comprises means for determining the agitation of said interface and the servo-control means is adapted to control the flow rate of at least one pump as a function of said agitation.
- the servo-control means is adapted to reduce the flow rate of at least one said pump when said interface has turbulences greater than a predetermined value.
- the present invention relates to a method of collecting water from at least one source of freshwater underwater, characterized in that it comprises:
- the present invention aims at a device for collecting water from at least one source of freshwater underwater, characterized in that it comprises:
- the quantity of pumped water represents the quantity of fresh water brought by these sources.
- the depth sensor comprises a level difference sensor between the surface of the fresh water inside the envelope collecting fresh water and the surface of the seawater around said envelope.
- the depth sensor comprises an equilibrium depth sensor of a float having a density intermediate between that of the freshwater and that of the seawater.
- the measurement is particularly stable and precise.
- the servo means is adapted to maintain said interface below the level of at least one source.
- the servo means is adapted to maintain said interface below the level of at least the source having the largest flow rate.
- the servo means is adapted to control the flow of at least one pump depending on the sea level during the tide. Thanks to these provisions, the absolute vertical position of the interface can remain substantially stable even though the depth below the immediate level of the water inside and / or outside the envelope depends on the phenomenon of the tide and varies cyclically.
- said envelope comprises a flexible partition surrounding the vertical above at least one source.
- said flexible partition is held in place by weights.
- said flexible partition has, in the upper part, inflated tubes.
- the device as briefly described above comprises means for determining agitation of the water outside at least one source of water, the control means being adapted to control the flow of at least one said pump depending on the agitation of the water.
- the water agitation determination means comprises a doppler effect, sonar or radar sensor. It is thus possible to determine said stirring remotely without introducing a physical sensor in the flow of source water and thus avoid creating disturbances of this flow, which could have the consequence of causing a mixture of fresh water and water. 'salt water.
- the water agitation determination means comprises at least one water agitation sensor positioned in the water and a means for measuring the movements of each said sensor.
- the water agitation determination means comprises means for determining a water density gradient.
- the device as briefly described above comprises a means for measuring the salinity of the water pumped or to be pumped and a pumping stop means when said salinity is greater than a predetermined value.
- the present invention relates to a method of collecting water from at least one source of freshwater underwater, held by an envelope surrounded by salt water insulating a quantity of water above least a source of fresh water, characterized in that it comprises:
- the present invention aims a device for collecting water from at least one source of freshwater underwater, characterized in that it comprises: - an envelope surrounded by salt water isolating a quantity of water over at least one source of fresh water,
- - Servo control means adapted to control the flow of at least one pump adapted to pump the fresh water inside the casing, depending on the agitation of the water.
- the water agitation determination means comprises a doppler effect, sonar or radar sensor.
- the water agitation determination means comprises at least one water agitation sensor positioned in the water and a means for measuring the movements of each said sensor. According to particular features, the water agitation determination means comprises means for determining a water density gradient.
- the water agitation determining means comprises a level difference sensor between the surface of the fresh water in an envelope collecting fresh water and the surface of the sea water around it. of said envelope.
- the water agitation determining means comprises an equilibrium depth sensor of a float having a density intermediate between that of the fresh water and that of the seawater.
- the servo means is adapted to control the flow of at least one pump depending on the sea level during the tide.
- the absolute vertical position of the interface can remain substantially stable even though the depth below the immediate level of the water inside and / or outside the envelope depends on the phenomenon of the tide and varies cyclically.
- said envelope comprises a flexible partition surrounding the vertical above at least one source.
- said flexible partition is held in place by weights.
- said flexible partition has, in the upper part, inflated tubes.
- the present invention relates to a method of collecting water from at least one source of freshwater underwater, retained by an envelope surrounded by salt water insulating a quantity of water above less a source of fresh water, characterized in that it comprises: a step of determining agitation of the water outside at least one water source, inside said envelope and
- FIG. 1 is a diagrammatic plan view of a particular embodiment of the device that is the subject of the present invention
- FIG. 2 schematically represents, in section, the particular embodiment of the device that is the subject of the present invention illustrated in FIG. 1; and FIG. 3 represents, in the form of a logic diagram, steps of a particular embodiment. of the method of the present invention.
- float relates to an element whose density is lower than that of at least one of the liquids used, generally salt sea water, and which, consequently, goes back to the interface of this liquid with a lower density liquid, usually less salty water, or with air.
- FIGS. 1 and 2 show a natural or artificial crack 100 in which submarine resurgences of source water 105, for example of karstic origin, occur.
- This crack 100 is provided with a flexible waterproof envelope 110 connected to the side walls 115 of the crack 100 in a sealed manner.
- Valves 120 are formed in the lower part of the flexible envelope 110 to allow evacuation of the possible overflow of water appearing inside the envelope without allowing, or limiting, the entrance of salt water inside the casing 110.
- These valves are, for example, consist of free parts of the flexible casing 110, of greater dimensions than those of openings formed in the casing 110 with respect to which these parts
- the envelope 110 comprises a flexible partition surrounding the vertical above at least one source. At the immediate exit of the fresh water from at least one source, a system of deflectors imposes a forced path to the fresh water gushing, to reduce turbulence and induce a laminar flow of fresh water.
- a pump 125 carried by a raft 130, is connected by pipes 135 to a purification unit 140.
- the pump 125 is controlled by a control unit 145 connected to sensors 150, 151, 152 and 155.
- the flexible envelope 110 is surrounded in its upper part by compressed air flanges 160 and is retained in its lower part by weights or links attached to the ocean floor and / or the edges of the crack.
- the pump 125 is replaced by a plurality of pumps.
- At least one sensor 150 is adapted to measure the difference in average level between the surface of the water inside the flexible envelope 110 and the surface of the water outside the flexible envelope 110.
- This sensor 150 is, for example, consisting of two level sensors positioned, one near the casing 110, the inner side and the other near the casing 110, the outer side.
- At least one sensor 151 is adapted to measure the salinity of the water near the inlet or in the water circuit of the pump 125. This measurement is, for example, carried out with a measurement of an electrical characteristic (resistance or capacity) of a sheet of water of known thickness, salt water being more conductive than pure water.
- At least one sensor 152 is adapted to measure the average level, under the surface inside the envelope, which is a water of a predetermined density.
- This sensor is, for example consisting of a radar, a sonar or a "float” whose density is intermediate between that of salt water and that of fresh water, "float” which is measured depth below the surface. It may also consist of a Doppler effect sensor measuring the speed of the interface as a function of the partial reflection of sound waves on this interface.
- At least one sensor 155 is adapted to measure the agitation of the water at least one resurgence of fresh water.
- This sensor 155 is, for example, consisting of a radar, a sonar or a plurality of "floats” whose densities are intermediate between that of salt water and that of fresh water, and possibly different "Floats” whose movements are measured. As can be understood, the sensors 152 and 155 can be coupled to provide the two measurements considered.
- the stirring sensor 155 may also consist of a turbulence sensor, for example by capturing infrasound emitted in turbulence.
- the stirring sensor can also be constituted by a sound intensity intensity of sound waves reflected partially on the interface.
- the stirring sensor may also consist of a Doppler effect sensor measuring turbulence on the interface as a function of the partial reflection of sound waves on this interface.
- the control unit 145 functions as a means of controlling the depth of the interface 170 between fresh water and salt water. This control unit 145 controls, as a function of said depth of the interface, the flow rate of at least one pump 125 which pumps fresh water over said interface.
- the control unit 145 When the depth of the interface exceeds, increasing, a certain threshold, or limit value, the control unit 145 increases the flow rate of the pumped water. Conversely, when the depth of the interface is lower than another threshold, or limit value, the control unit 145 reduces the flow of water pumped.
- the flow rate is a continuous function of the depth
- the transfer function of the control loop, in counter-reaction is calculated to avoid oscillation of the depth of the interface, in a manner known to the man of the service of servitude.
- the control unit 145 takes into account the tide and is adapted to maintain the interface below the level of at least one source and, preferably, below the level of at least the source having the highest flow rate. important.
- the depth is, by compensation, replaced by the altitude of the interface relative to a fixed point and the control unit 145 controls the flow of at least one pump depending on the level of the sea during the tide.
- the control unit 145 also constitutes a means for determining agitation of the water outside at least one source, of water and inside the casing 110, and is adapted to control the flow of at least one pump depending on the agitation of the water. In particular, when the turbulence exceeds a predetermined limit value, the unit will shut down the operation of the pump 125 or reduce it as an alternative disclosure of steps 315 and 325 (see description of Figure 3, below).
- the control unit is also adapted to stop the operation of the pump 125 when the salinity measurement of the water pumped or to be pumped is greater than a predetermined limit value which depends on the desalting capacity of the purification unit 140.
- control unit 145 constitutes a servocontrol means 145 adapted to control the flow of at least one pump 125 adapted to pump fresh water over the interface between the fresh water and the salt water, depending on the state of said interface, in particular its relative depth with that of at least one and, if possible all sources and / or turbulence of this interface to maintain the depth of said interface below the mouth of at least one said water source soft and, possibly, not to pump water of high salinity generated by these turbulence.
- the device when it is started during normal operation, during a step 305, the device measures the salinity of the water to be pumped or, after a short pumping period intended to purge the salinity sensor, pumped water. Then, during a step 310, it is determined whether the measured salinity is greater than a first predetermined value. If so, during a step 315, the operation of the pump 125 is stopped and a restart command is awaited, either manually or automatically, for example after a predetermined time (for example five minutes). Then we return to step 305.
- a predetermined time for example five minutes
- step 310 If during step 310, it is determined that the measured salinity is lower than the first predetermined value, during a step 320, the importance of the turbulences at the interface between the salt water and the water is determined. freshwater. Then, during a step 325, it is determined whether the amplitude and / or the speed of the turbulence is greater than a second predetermined value. If so, during the step 315, the operation of the pump 125 is stopped and a restart command is awaited, either manually or automatically, for example after a duration. predetermined (for example five minutes). Then we return to step 305.
- a duration for example five minutes
- step 325 If during step 325, it is determined that the amplitude and / or the speed of turbulence is less than the second predetermined value, during a step 330, it is resumed, if it was stopped, or maintained pumping and the depth of the interface between salt water and fresh water is determined.
- the control unit 145 causes the decrease in the flow of water pumped so that the depth of the interface 170 increases and that the mixed water resulting from turbulence does not come opposite at least one, preferably all, mouth of freshwater source.
- the flow rate of the pump 125 is reduced and a control of recovery of the pump is expected. normal flow rate, the pump that intervenes when the interface is at a depth function growth amplitude and / or the speed of turbulence.
- a step 335 the measurement of the depth as a function of the tide is compensated to obtain an absolute altitude value.
- a step 340 depending on the depth of the interface and / or its altitude and depending on the depth of at least the main source of fresh water, or its altitude, and, optionally, the amplitude or the speed of turbulence, the flow of water that the pump 125 must ensure.
- the transfer function of the servo in closed loop which provides this flow rate as a function of the depths and / or altitudes, depends on the flow rate of the sources in the envelope 110 and the rates of variation of this flow rate observed prior to the installation of the device or obtained during a phase of learning or operating the device.
- the depth of the interface is, through the flow rate of the pump 125, maintained below the mouth of at least one source of fresh water and, preferably, all sources of fresh water.
- step 345 the pump 125 is commanded to ensure the flow determined during the step 340. Then we return to the step 305.
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- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Environmental & Geological Engineering (AREA)
- Health & Medical Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Public Health (AREA)
- Chemical & Material Sciences (AREA)
- Water Supply & Treatment (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Hydrology & Water Resources (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Medicinal Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
- Organic Chemistry (AREA)
- Pharmacology & Pharmacy (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Veterinary Medicine (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
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- Sampling And Sample Adjustment (AREA)
Abstract
Description
Claims
Priority Applications (6)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP09722422A EP2245234A2 (fr) | 2008-01-23 | 2009-01-23 | Procede et dispositif de captation d'eau douce sous-marine |
MX2010008084A MX2010008084A (es) | 2008-01-23 | 2009-01-23 | Proceso y dispositivo para la recoleccion de agua dulce submarina. |
US12/863,879 US20110038674A1 (en) | 2008-01-23 | 2009-01-23 | Method and device for tapping undersea freshwater |
TNP2010000341A TN2010000341A1 (en) | 2009-01-23 | 2010-07-21 | Method and device for tapping undersea freshwater |
IL207152A IL207152A0 (en) | 2008-01-23 | 2010-07-22 | Process and device for the collection of undersea freshwater |
MA33109A MA32097B1 (fr) | 2008-01-23 | 2010-08-23 | Procede et dispositif de captation d'eau douce sous-marine |
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR0800359 | 2008-01-23 | ||
FR0800358A FR2926569A1 (fr) | 2008-01-23 | 2008-01-23 | Procede et dispositif de captation d'eau douce sous-marine |
FR0800358 | 2008-01-23 | ||
FR0800359A FR2926570B1 (fr) | 2008-01-23 | 2008-01-23 | Procede et dispositif de captation d'eau douce sous-marine |
Publications (2)
Publication Number | Publication Date |
---|---|
WO2009115657A2 true WO2009115657A2 (fr) | 2009-09-24 |
WO2009115657A3 WO2009115657A3 (fr) | 2009-11-26 |
Family
ID=41091284
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/FR2009/000076 WO2009115657A2 (fr) | 2008-01-23 | 2009-01-23 | Procede et dispositif de captation d'eau douce sous-marine |
Country Status (6)
Country | Link |
---|---|
US (1) | US20110038674A1 (fr) |
EP (1) | EP2245234A2 (fr) |
IL (1) | IL207152A0 (fr) |
MA (1) | MA32097B1 (fr) |
MX (1) | MX2010008084A (fr) |
WO (1) | WO2009115657A2 (fr) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2481917A (en) * | 2010-07-07 | 2012-01-11 | Alan Dennis Kirkby | Oil and gas collection device with floating valve |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CA2788981C (fr) | 2010-02-15 | 2019-10-29 | Arothron Ltd. | Systeme de stockage d'energie sous-marine |
FR3135998B3 (fr) * | 2022-05-30 | 2024-05-24 | joseph Marc | Installation pour l’alimentation en eau douce d’un territoire littoral |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2701974A1 (fr) * | 1993-02-26 | 1994-09-02 | Therond Patrick | Procédé et dispositif de captage de résurgences sous-marines d'eau douce. |
FR2792664A1 (fr) * | 1999-04-26 | 2000-10-27 | Eric Gilli | Procede et dispositif de captage d'eau douce au niveau d'un exutoire karstique |
FR2795109A1 (fr) * | 1999-06-18 | 2000-12-22 | Geocean Solmarine | Procede et dispositif de detection, localisation et captage de source d'eau douce en mer |
FR2857389A1 (fr) * | 2003-07-08 | 2005-01-14 | Nymphea Water | Procede et dispositif de captage d'eau douce |
WO2007017703A1 (fr) * | 2005-08-11 | 2007-02-15 | Peril, Michel | Dispositif de captage de resurcences sous-marines d ' eau douce |
WO2009001145A1 (fr) * | 2007-06-22 | 2008-12-31 | Ion Argyriadis | Systeme d'exploitation de sources sous-marines d'eau douce et mode de fonctionnement |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4976146A (en) * | 1988-10-19 | 1990-12-11 | Senghaas Karl A | Liquid level measuring apparatus |
US7311001B2 (en) * | 2006-03-02 | 2007-12-25 | Herbert Liu | Multiphase flow measurement apparatus and method |
-
2009
- 2009-01-23 EP EP09722422A patent/EP2245234A2/fr not_active Withdrawn
- 2009-01-23 WO PCT/FR2009/000076 patent/WO2009115657A2/fr active Application Filing
- 2009-01-23 MX MX2010008084A patent/MX2010008084A/es unknown
- 2009-01-23 US US12/863,879 patent/US20110038674A1/en not_active Abandoned
-
2010
- 2010-07-22 IL IL207152A patent/IL207152A0/en unknown
- 2010-08-23 MA MA33109A patent/MA32097B1/fr unknown
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2701974A1 (fr) * | 1993-02-26 | 1994-09-02 | Therond Patrick | Procédé et dispositif de captage de résurgences sous-marines d'eau douce. |
FR2792664A1 (fr) * | 1999-04-26 | 2000-10-27 | Eric Gilli | Procede et dispositif de captage d'eau douce au niveau d'un exutoire karstique |
FR2795109A1 (fr) * | 1999-06-18 | 2000-12-22 | Geocean Solmarine | Procede et dispositif de detection, localisation et captage de source d'eau douce en mer |
FR2857389A1 (fr) * | 2003-07-08 | 2005-01-14 | Nymphea Water | Procede et dispositif de captage d'eau douce |
WO2007017703A1 (fr) * | 2005-08-11 | 2007-02-15 | Peril, Michel | Dispositif de captage de resurcences sous-marines d ' eau douce |
WO2009001145A1 (fr) * | 2007-06-22 | 2008-12-31 | Ion Argyriadis | Systeme d'exploitation de sources sous-marines d'eau douce et mode de fonctionnement |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2481917A (en) * | 2010-07-07 | 2012-01-11 | Alan Dennis Kirkby | Oil and gas collection device with floating valve |
GB2481917B (en) * | 2010-07-07 | 2013-03-27 | Alan Dennis Kirkby | Underwater oil and gas collection system |
Also Published As
Publication number | Publication date |
---|---|
MA32097B1 (fr) | 2011-02-01 |
EP2245234A2 (fr) | 2010-11-03 |
MX2010008084A (es) | 2010-11-10 |
WO2009115657A3 (fr) | 2009-11-26 |
IL207152A0 (en) | 2010-12-30 |
US20110038674A1 (en) | 2011-02-17 |
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