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WO2019123330A1 - Pompe marine à émulsion - Google Patents

Pompe marine à émulsion Download PDF

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Publication number
WO2019123330A1
WO2019123330A1 PCT/IB2018/060364 IB2018060364W WO2019123330A1 WO 2019123330 A1 WO2019123330 A1 WO 2019123330A1 IB 2018060364 W IB2018060364 W IB 2018060364W WO 2019123330 A1 WO2019123330 A1 WO 2019123330A1
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WO
WIPO (PCT)
Prior art keywords
pipe
water
lett
tab
sea
Prior art date
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Ceased
Application number
PCT/IB2018/060364
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English (en)
Inventor
Bruno Cossu
Elio CARLO
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Individual
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Individual
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Publication date
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Publication of WO2019123330A1 publication Critical patent/WO2019123330A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING 
    • B63B35/00—Vessels or similar floating structures specially adapted for specific purposes and not otherwise provided for
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02B—HYDRAULIC ENGINEERING
    • E02B1/00—Equipment or apparatus for, or methods of, general hydraulic engineering, e.g. protection of constructions against ice-strains
    • E02B1/003—Mechanically induced gas or liquid streams in seas, lakes or water-courses for forming weirs or breakwaters; making or keeping water surfaces free from ice, aerating or circulating water, e.g. screens of air-bubbles against sludge formation or salt water entry, pump-assisted water circulation
    • 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
    • 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
    • F04B35/00—Piston pumps specially adapted for elastic fluids and characterised by the driving means to their working members, or by combination with, or adaptation to, specific driving engines or motors, not otherwise provided for
    • F04B35/004—Piston pumps specially adapted for elastic fluids and characterised by the driving means to their working members, or by combination with, or adaptation to, specific driving engines or motors, not otherwise provided for driven by floating elements
    • 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 relates to the field of the machines aimed at harnessing sea energies and, in particular, wave energies ( wave energy converterANEC).
  • a hydro-pneumatic machine driven by wave energy, characterized in that it has no moving mechanical parts and, in its main core, it is made up of only two structural components, a hollow body, open at the bottom and partially immersed in sea water, and a tube, both joined together to form a single body.
  • the shape of the hollow body is substantially like a mushroom whose cap and stem are hollow; the stem, in turn, is open at both ends and the lower section of its surface is crossed by holes; the tube is external and coaxial to the stem and it is joined thereto so as to form a single body.
  • This particular shape of the hollow body and type of connection to the tube allows the pump to operate simultaneously as an air compressor on one side, the one corresponding to the cap, and as an airlift on the other side, the one corresponding to the hollow portion of the stem.
  • the pump substantially can be implemented in four versions, each one, in turn, provides several variants and implementation modes:
  • a fourth version for the downwelling of surface water, its oxygenation and the simultaneous production of compressed air, substantially without additional energy costs.
  • the transfer of deep water or the downwelling of the raised surface water, according to the pump versions indicated in points 2 and 3 above, is obtained by making the water raised by the air lift to flow to the upper mouth of another pipe, internal or adjoined to the air lift;
  • the downwelling of raised surface water, its oxygenation and the simultaneous production of compressed air according to the pump version indicated in point 4 is obtained by installing a Venturi tube on the upper end of the pipe, whose restricted section is connected to the external atmosphere, so that it (also) operates like a submerged water column, flowing water column hydraulic air compressor (trompe).
  • the system can be used in an OTEC plant, to supply the cold and warm water required for the operation of the same, thus allowing to use simultaneously, and without additional costs, in addition to the mechanical energy of the waves for the purposes indicated in points 1 to 4 above, even the thermal one of marine water treated in the process, for the production (electively) of electric energy.
  • one of the conditions for storm formation is a temperature of surface water higher than 26.5 degrees, whereas in the areas in which the artificial upwelling is caused, not only such temperature can never be reached, but the determined temperature is considerably lower than such value, considering that below 300 metres of depth the temperature of marine water is already lower than 15 degrees: at 500 meters it is about 10 degrees.
  • this type of energy is given by the fact that it is clean energy, which can be stored and easily transferred.
  • the compressed air produced with a hydraulic compressor is dry; without contaminants; it can be produced substantially without any additional cost, at any pressure value allowed by the morphological features of the marine environment in which the system is installed; the related process even involves the concomitant oxygenation of the water which made the compression.
  • the performance of such plants is low - considering the not big difference in temperature between hot water and cold water used in the process (generally, not higher than 20 degrees) - it has to be considered that the electricity produced by such plants comes from a free, clean, inexhaustible, renewable resource and that the use of the pump, the present invention relates to, in such plants implements, as said, an additional result with respect to those highlighted in the points above.
  • the system which is considered to be most effective is the one based upon the pumping of deep water with the airlift system.
  • Such system can be summarized as follows: a long tube (upwelling pipe) is dipped vertically in water; the lower end is placed at the depth (usually, at least 300 metres) thereat there is the water which one wants to lift; the upper end - acting as discharge outlet - is placed at the height (or in proximity) of the sea surface.
  • a suitable diffusor compressed air is blown which, by mixing with the water existing in such tube section, decreases the density thereof.
  • the compressed air necessary to the airlift operation is produced by a specific compressor, driven electrically or fed with fossil fuels, installed, if possible, on the ground, or on barges, or floating platforms.
  • a specific compressor driven electrically or fed with fossil fuels, installed, if possible, on the ground, or on barges, or floating platforms.
  • the compressed air necessary to the airlift operation can have a not high compression value (an increase in pressure with respect to the atmospheric pressure even only of 0.2/0.3 atmospheres is sufficient), one has thought to input in the upper section of the upwelling pipe the compressed air produced by an OWC connected to the same by means of a hose.
  • the hollow body OWC in order to operate, uses at least a mechanical valve allowing, in the suction phase, the atmospheric air to enter the interior of the hollow body, in the compression phase, the compressed air to outflow only inside the (upper) portion of the upwelling pipe, acting as emulsion tube.
  • the present invention relates to, which as said consists of only two structural components, a hollow body and a tube, both joined together so as to form one single body, and it has no moving mechanical parts.
  • the forced downwelling (as well as the artificial upwelling) are performed in OTEC plants to have available hot water (and cold water) necessary to the plant operation.
  • usually mechanical pumps are used.
  • the downwelling generally is determined by harnessing the wave energy and in particular the potential energy deriving from the height of the same.
  • the water forming the wave crest substantially flows by overtopping, and is collected inside floating vessels - the edges thereof are placed at higher height than that of the surface of sea when it is calm, but lower than that reached by the wave crest when the sea is rough - therefrom, through a suitable pipe, then, it flows out to the bed, by gravity.
  • the fundamental limit of such type of plants is substantially given by the fact that, on one side, only gravitational, and not kinetic, potential energy of waves can be used, on the other side, that only the wave limited portion raising beyond the hollow body’s edge can be captured.
  • compressed air production As to compressed air production.
  • the compressed air production by means of a hydraulic hydro-compressor - also designated trompe or Taylor compressor, or even HAC ( Hydraulic Air Compressor) is a century-long known art (to say the truth, as from antiquity) widely used in past, in particular in mines, to produce the compressed air necessary for cooling the tunnels placed at great depth and to guarantee the air change; in works (above all, in France and Switzerland) for constructing mountain tunnels, to actuate the hammers and other pneumatic devices used in excavation works; in Catalan furnaces, to supply combustion with strong jets of compressed air, with the purpose of reaching the high temperatures required for metal melting; in transportation and other fields.
  • HAC Hydraulic Air Compressor
  • the pumps of this type substantially consist of two tubes and by a chamber/tank, wherein the separation of compressed air from water takes place; they have no moving mechanical parts; once started, they operate continuously in time without the need for either adjustment or maintenance. For this reason, such pump type is particularly robust and substantially not subjected to failures nor wear.
  • the overall percentage of the air in the mixture is equal to 10%
  • the hydrostatic pressure which can be exerted by such column is equal (at most) to 72 metres of water column. This fact makes clear that the water jump necessary so that the plant may operate should be at least 10 metres.
  • the present invention relates to, has particularly important advantages with respect to the existing machines, deriving from:
  • the pump is a machine without moving mechanical parts, it is made up of only two structural components, both joined together to form a single body; it is a simple and robust structure. Moreover, once installed, it operates automatically and indefinitely in time, without requiring particular start, adjustment, control and maintenance procedures. Its duration substantially coincides with that of the materials used for its construction;
  • the pump in fact, can operate effectively even discontinuously and by using waves having various (even if very limited) height, which allows to install the plant practically in any sea area;
  • the pump in fact, usually is installed in open sea and even in the event that it is used to supply deep water to coast fish farming plants or for the production of compressed air, to be used on the ground, it is always installed at considerable distance (even kilometres) away from the coast and cold water and compressed air are transferred to the place of use through submerged pipe.
  • the pump in its basic form, consists of only two structural components, both joined together to form a single body:
  • - a hollow body, provided with devices adapted to make it floating, with shape substantially analogous to that of a mushroom whose cap and stem are hollow, provided with anchoring devices which do not allow it to raise over the free surface of the sea when it is calm; which operates, in the spaced closed by the cap, like an oscillating water column (OWC), to compress the atmospheric air flowing inside thereof through suitable devices, in the one closed by the stem, like the emulsion tube of an airlift supplied by the compressed air indeed produced by the compressor;
  • OBC oscillating water column
  • the pump in its basic form, which is the one according to claim 1 , substantially comprises the following structural/functional components:
  • a hollow body TABLE 1 , lett. A+B.
  • the same, as said, has a shape substantially analogous to that of a mushroom, the cap (TABLE 1 , lett. A) and stem (TABLE 1 , lett. B) thereof are hollow and the latter is open at its two ends. It is provided with devices adapted to make it floating.
  • the hollow body portion corresponding to the cap encompasses an air chamber and acts as compressor (hereinafter: compressor). Its shape, preferably, is so that its volume, in the portion which under calm sea conditions is above the floating line, increases with increasing height less than proportionally.
  • the hollow body is as high as about the significant height of the waves occurring locally; it is immersed, under calm sea conditions, at a depth ranging from one third/one fourth of its overall height; its base is open; its side surface, along a strip of about 5-10 cm above the floating line, is crossed by several holes (TABLE 1 , lett. C), allowing the atmospheric air, when the wave lowers to descend below the sea level under calm conditions, to flow inside the hollow body and the water existing in the portion of the same acting as compressor to go out in the outer environment.
  • Such hollow body portion preferably at the height of the floating line, is provided with handles (TABLE 1 , lett. D), or other devices, at least three, for hooking anchoring chains, so that it cannot lift above the free surface of the sea when it is calm.
  • handles TABLE 1 , lett. D
  • each wave passage determines inside the compressor the water raising depending upon the features of the wave itself; such raising, acting as hydraulic plunger, in turn determines the compression of the air contained in the hollow body.
  • the hollow body portion corresponding to the stem (TABLE 1 , lett. B) too is hollow and it acts like the emulsion tube of an airlift (hereinafter: emulsion tube). It is configured like a rectilinear tube section; made of stiff material; open at the two ends; immersed in vertical position in the sea water for a length of at least 12 metres. Its surface, starting from about 20/30 cm below the free surface of the sea when it is calm, is crossed by several holes
  • a delivery tube TABLE 1 , lett. F.
  • Such tube has a double function: in its lower section, it constitutes the tube conveying the water to be lifted inside the emulsion tube; in the upper section, it constitutes the outer wall of the conduit for supplying compressed air and for intaking the atmospheric air, according to subsequent point 1.3). It is constituted by a tube section made of stiff material, open at the two ends, integral to the hollow body; coaxial to the emulsion tube; having diameter slightly larger than the same. This involves that between the hollow body portion acting as emulsion tube and the delivery tube an air gap is created.
  • the upper end of the delivery tube is positioned at a height of 5-10 centimetres below the hollow body roof - height usually not reached by the wave - so that, generally, in the compression phase, only air accesses the interior of the above air gap.
  • Its lower end (TABLE 1 , lett. Fi) is positioned at a depth slightly higher than the one thereat there is the lower end of the emulsion tube and it is equipped with a grid, preventing foreign bodies from flowing inside pipes;
  • a conduit for supplying compressed air to the emulsion tube e for intaking atmospheric air to the hollow body (hereinafter: supply/suction conduit).
  • supply/suction conduit a conduit for supplying compressed air to the emulsion tube e for intaking atmospheric air to the hollow body.
  • the present invention relates to, thanks to the particular shape of the hollow body and of the delivery tube, a suitable tube is not necessary, but the supply takes place through the circular crown-sectioned tube formed by the air gap between the delivery tube and the emulsion tube (TABLE 1 , lett. G). Under calm sea conditions, such conduit is filled up with sea water as far as the height of the floating line of the hollow body, with air, in the overlying portion;
  • Such pump component is constituted by the set of holes existing in the emulsion tube (TABLE 1 , lett. E); therethrough, as said previously, the compressed air can spread inside the emulsion tube and the atmospheric air can flow inside the supply/suction conduit, according to the previous point and then inside the hollow body;
  • an anchoring system 1.6) an anchoring system.
  • the same is constituted by at least three robust chains (TABLE 1 , lett. H), the upper ends thereof are hooked to the hollow body, the lower ones are fastened to the seabed, with heavy anchors or other systems.
  • the push received by the hollow body towards the other one at each wave passage in fact, is very strong. Therefore, for example, in case the hollow body- as the one according to TABLE 1 (illustrated, in detail, in the following chapter) has a 6-metre-wide cylindrical base and the air compression caused by the wave raising is about 0.5 atmospheres, the upward push received by the hollow body will be higher than 14 tons.
  • the chains’ length substantially coincides with the existing distance, when the sea is calm, between the seabed and the hooking devices lying on the hollow body, which then cannot be lifted above the free surface of the same when it is calm.
  • TABLE 1 represents, in section, one of the several modes for implementing the pump basic form.
  • the sea conditions thereto the table relates are calm sea conditions.
  • the measurements which in the present description are assigned to the several pump components are purely indicative and act only by way of example of the operating principle.
  • the compressor and, that is, the
  • the hollow body portion performing such function is designated by letter A; the same has cylindrical shape as far as little less than half of its height, truncated conical in the remaining portion.
  • the compressor overall height is 1 metre and a half; the lower base diameter is 6 metres; the upper base diameter is 3 metres.
  • the compressor is immersed in water by 50 centimetres; its base is open, so that the water can penetrate freely the interior thereof.
  • the compressor cylindrical portion height above the floating line is 20 centimetres; in the first 10 centimetres, the compressor wall is holed.
  • the holes are designated by letter C.
  • the compressor truncated conical portion height is 80 centimetres.
  • letter D further designates two of the three handles constituting the points for hooking the anchoring chains;
  • letter H designates the latter; on the contrary, the body of the devices guaranteeing the hollow body floating has not been represented in order not to prevent the holes, crossing along the strip of 5/10 cm the compressor wall, from being seen.
  • the emulsion tube is designated by letter B and it is represented like a cylindrical tube, open at the two ends. Its upper end outgoes by some centimetres from the compressor roof.
  • the emulsion tube has a 1 -meter-wide diameter; its length is 14 metres; it is immersed in vertical position by 13 metres.
  • the holes are highlighted which, starting from about 20/30 centimetres below the free surface of the sea when it is calm, are present on its side surface; their size increases with increasing depth.
  • Such holes are designated by letter E.
  • the delivery tube is detected by letter F.
  • Letter Fi designates the lower end of the delivery tube, acting as intake mouth, and which is at a depth of 13.50 metres (slightly lower than the one thereat there is the lower end of the emulsion tube).
  • the hollow body volume which, when the sea is calm, is occupied by atmospheric air, is equal to about 18 cubic meters, cubic metres, about 5.50 thereof constitute the volume occupied in the cylindrical portion and 12.50 constitute the truncated conical portion.
  • the hollow body floats at the height of its surface; the outer atmospheric air can freely flow inside thereof through the holes existing in the lower portion of its side surface, by occupying the whole space existing above the water free surface;
  • the hollow body can oscillate vertically only in the space comprised between the wave trough and the sea level when the sea is calm, since, once reached such height, the anchoring system locks it;
  • the height thereat the water can penetrate the hollow body interior substantially depends upon the shape and volume of the hollow body above the floating line, as well as upon the wave height and kinetic energy, intended to transform into pressure energy as the air existing in the hollow body, by increasing in pressure, gradually opposes increasing resistance, until stopping it.
  • Such height is given by the point in which the air pressure included in the hollow body is equal to the one exerted by the wave that has penetrated the interior thereof;
  • the water existing in the supply/suction conduit is forced to descend downwards and to flow inside the emulsion tube through the holes existing on the same; - the compressed air flows inside the emulsion tube and, by mixing with herein existing water, allows such tube to operate as an ordinary airlift.
  • the hollow body volume which, under calm sea conditions, is occupied by the atmospheric air is equal to about 18 cubic metres, about 5.50 thereof constitute the cylindrical portion volume and 12.50 the truncated conical portion volume.
  • the water level raising of 20 cm forces the air to occupy only the volume delimited by the truncated conical portion of the hollow body, with a volumetric reduction of about 30% and a corresponding air pressure increase of about 4.5 metres, in terms of equivalent water column.
  • a pressure increase of this extent allows, in a plant having the mentioned sized, the upwelling of several cubic metres of water per second, provided that: -the water quantity which is possible to upwell in the unit time (substantially) depends, on one side upon the emulsion tube diameter, on the other side upon the pressure difference which is possible to be determined between the mixture column existing in the same and the corresponding water column placed outside;
  • the pump illustrated in the previous point is the one related to its basic form and that is the one which substantially exists in all four versions of the same.
  • Such form provides different variants which can relate to both the single components of the pump (compressor, emulsion tube, delivery tube, conduit for supplying compressed air, diffusor), and the immersion depth of the hollow body, and the anchoring system, which in some variants can allow the hollow body to oscillate completely depending upon the wave course, in other variants it can impede it completely.
  • Such variants can be present in all pump versions or only in some thereof.
  • both the variants of the basic form of the pump and the single versions of the same with, if existing, the related variants are illustrated hereinafter.
  • Variant n.1 (set forth by claim n. 2) It relates to the delivery tube and the conduit for supplying compressed air.
  • Variant n.1 (set forth by claim n. 2) It relates to the delivery tube and the conduit for supplying compressed air.
  • this variant :
  • the delivery tube is very short, less than one meter, it has the same diameter as the emulsion tube; it is joined physically to the same, so that the two tubes, even if they continue to have a separate function, constitute one single lifting tube (TABLE 2, lett. I);
  • the conduit for supplying compressed air is constituted by a tube having circular crown section formed by the air gap (TABLE 2, lett. G) between the emulsion tube and another tube coaxial to the latter (TABLE 2, lett. L) and having a slightly larger diameter than the same, the lower end thereof is closed and it is placed at the depth thereat the emulsion tube joins together with the delivery tube; the upper end is positioned at a height of about 5/10 centimetres below the hollow body roof.
  • the operating principle is substantially identical to the one described for the basic form.
  • the conduit for supplying compressed air is constituted not by the tube having circular crown section described at point A.1.2. (with reference to the first version), but by a tube (TABLE 3, lett. M), open at the two ends, that is only in the upper end; its diameter is considerably smaller than the one of the emulsion tube; internal and usually coaxial to the same for almost its entire extension; the surface thereof, starting from few decimetres below the free surface of the sea when it is calm, is crossed by several holes (TABLE 3, lett. E), having sizes increasing with increasing depth; the upper ending section thereof, after having crossed the emulsion tube, stops at a height of few decimetres below the hollow body roof.
  • the operating principle is substantially identical to the one described for the basic form, except the mode for inletting compressed air, which takes place in the central portion of the emulsion tube.
  • the hollow body is not provided with devices adapted to make it floating, but it is joined, firmly, to a basement fastened to the seabed, or to other structure (for example, a wholly submerged floating platform, anchored to the seabed), forcing to keep substantially unaltered its own position despite the waves’ motion.
  • the hollow body can consist even of a fixed structure (usually made of concrete or steel), incorporated in the coast, acting as compression chamber of an OWC.
  • the pump is electively used to lift (preferably, by subsequent stages, according to claim n. 9) the water present in the compression chamber to supply it the potential energy required to actuate a hydraulic machine (for example a turbine).
  • the compressor is divided vertically into sectors for about two thirds of its height by one or more walls inside the same.
  • septa may allow, depending upon the ratio between the compressor base surface and the features of wave, a greater effectiveness in transforming the kinetic energy of the same in pressure energy.
  • the compressor has a higher height than the one of the significant wave occurring locally and it is immersed in water by more than half of its height. It is not provided with devices adapted to make it floating, but as in variant A.3), the anchoring system forces it to keep unaltered its own position despite the waves’ motion.
  • the operating principle, as far as air compression is concerned, is the one described by McCormick in “Ocean Wave Energy Conversion”, Dover Publications, 2007, pages 61 -66.
  • the compressor has a higher height than the one of the significant wave occurring locally and it is immersed in water by half of its height, as in the variant according to the preceding point A.5);
  • the side surface of the hollow body has no holes
  • the section of the emulsion tube that is of the tube for supplying compressed air in case of variant according to the preceding point A.2), the surface thereof is holed, starts as from few decimetres above the free surface of the sea when it is calm;
  • the system for anchoring the plant to the seabed and/or in case to other fixed structure allows the hollow body to oscillate by following the waves’ motion.
  • the fact that the hollow body can oscillate by following the whole motion of the wings involves that, in the compression phase, the presence of holes on the side strip of the compressor could allow compressed air to be discharged, which fact suggests to remove them.
  • the section of emulsion tube which results to be submerged is larger than the one submerged under calm sea conditions, which fact makes suitable that the holed surface of the emulsion tube that is of the tube for supplying compressed air starts at few decimetres above the free surface of the sea when it is calm.
  • the intake mouth of the delivery tube is joined to a hose - an upwelling pipe - along several hundreds of metres or even more, the lower end thereof, acting as intake mouth, is placed at the depth thereat there is the water which one wants to lift, which can come from even very far sites with respect to the point in which there is the pump.
  • This pump version provides a variant, which relates to the upwelling pipe.
  • B.1.2 In such variant (set forth by claim n.5), a buoy keeps the last 5-10 metres of the upper section of the upwelling pipe in horizontal position or however with an angle so that the vertical motion of the hollow body involves only this tract and not the whole pipe.
  • This version (set forth by claim n. 6) is characterized by the following features:
  • the upper end of the emulsion tube does not stop at the height of the compressor roof, but it projects therefrom by few metres, leading into the interior of a recipient - usually, a tube having larger diameter, closed at the base - acting as tank for the collection and loading of the lifted water which has separated from emulsion;
  • the water which gradually flows into the loading tank is transferred to the place of use through a pipe, the upper end thereof, acting as intake mouth, leads into the interior of the tank, at the height of its base; the lower end, acting as discharge outlet, reaches the place in which the water has to be used and it is placed at a lower height than the one of the free surface of the water which is collected in the collection tank.
  • This version is particularly useful when, for landscape and environmental reasons, it is not possible or suitable to install the pump where deep water has to be used. It is just convenient to underline that even a low difference in level (for example, even by 2-3 metres), allows the transfer by gravity of water even at great distance.
  • the emulsion tube diameter in case of the pump implemented according to the basic form, that is the lifting tube, in case of the pump according to variant A.1 ), is larger than that provided in said pumps; the upper end of the same projects from the compressor’s roof and it stops at a height higher by about one metre than the one thereat the air-water emulsion is lifted (TABLE 4, letters I and N, by considering that both such valve and the subsequent ones 5 and 6 illustrate pumps implemented according to the variant A.1 ), set forth by claim n. 2).
  • This pump version provides a variant (set forth by claim n.8), which relates to the supply of the delivery tube and it has the function of allowing the downwelling of the water placed immediately below the sea surface, which is the hottest water, richest in carbon dioxide.
  • a variant set forth by claim n.8
  • This pump version (set forth by claim n. 10), is constituted by the one for the downwelling of surface water, described at the previous point B.3, in which:
  • suction conduit TABLE 6, lett. R or other device which allows the atmospheric air to flow inside the restricted section of Venturi tube to mix with water flowing therein;
  • This pump version provides a variant (set forth by claim n.9) which relates to the lifting according to several subsequent stages of water to be used as working fluid for the hydraulic compressor, so as to provide to such fluid the piezometric load necessary to produce compressed air effectively.
  • the piezometric change necessary to operate the hydraulic compressor is higher.
  • the plant operation implies that the water column existing in the hydraulic compressor has an (adequately) higher pressure than the one exerted in the point outletting from the water column outside the pipe.
  • the upper end of the emulsion tube does not stop at the height of the hollow body roof but it projects therefrom by at least one metre, by leading into the interior of a recipient, usually a tube having larger diameter, closed at the base, acting as tank for collecting the lifted water which has separated from emulsion;
  • the length of the delivery tube, in the portion underlying the emulsion tube, according to claim n. 2, is (at least) 15/20 metres;

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
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  • Combustion & Propulsion (AREA)
  • Ocean & Marine Engineering (AREA)
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  • Jet Pumps And Other Pumps (AREA)

Abstract

La présente invention concerne une pompe marine, laquelle pompe est une machine hydropneumatique, entraînée par l'énergie houlomotrice - un convertisseur d'énergie houlomotrice (WEC) - et laquelle est caractérisée en ce qu'elle n'a pas d'éléments mécaniques mobiles et en ce qu'elle est constituée uniquement par deux composants structurels : un corps en forme de boîte, ouvert à la base, partiellement immergé dans l'eau de la mer, et un tube, réunis l'un à l'autre de façon à former un corps unique. La forme particulière du corps et la façon dont il est relié au tube permettent à la pompe de fonctionner, d'une part, à la façon d'un compresseur d'air, et, d'autre part, à la façon d'une pompe à émulsion d'air. La pompe peut être utilisée spécialement pour l'élévation des eaux profondes (remontée d'eau) ; ou bien pour la descente des eaux superficielles (plongée d'eau) ; ou, également - agissant comme un hydro-compresseur d'air immergé (trompe) - pour la descente d'eaux de surface, leur oxygénation et la production simultanée d'air comprimé.
PCT/IB2018/060364 2017-12-21 2018-12-19 Pompe marine à émulsion Ceased WO2019123330A1 (fr)

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IT102017000148585 2017-12-21
IT201700148585 2017-12-21

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IT201900014634A1 (it) 2019-08-12 2021-02-12 Bruno Cossu Airlift azionato da una pompa ad aspirazione mossa dall’energia del vento ovvero da quella delle onde marine
JP7297351B1 (ja) * 2023-01-25 2023-06-26 古川精機株式会社 養殖対象生物肥育装置
WO2025123061A1 (fr) * 2023-12-08 2025-06-12 Soloviev Alexander V Restauration et expansion d'habitats de récif corallien à l'aide de descente d'eau de surface artificielle

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT201900014634A1 (it) 2019-08-12 2021-02-12 Bruno Cossu Airlift azionato da una pompa ad aspirazione mossa dall’energia del vento ovvero da quella delle onde marine
WO2021028761A1 (fr) 2019-08-12 2021-02-18 Bruno Cossu Émulseur à air actionné par une pompe d'aspiration entraînée par l'énergie éolienne ou par l'énergie marémotrice
JP7297351B1 (ja) * 2023-01-25 2023-06-26 古川精機株式会社 養殖対象生物肥育装置
WO2025123061A1 (fr) * 2023-12-08 2025-06-12 Soloviev Alexander V Restauration et expansion d'habitats de récif corallien à l'aide de descente d'eau de surface artificielle

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