WO2008084507A1 - Système de production d'électricité à partir de l'énergie des vagues - Google Patents

Système de production d'électricité à partir de l'énergie des vagues Download PDF

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Publication number
WO2008084507A1
WO2008084507A1 PCT/IT2007/000547 IT2007000547W WO2008084507A1 WO 2008084507 A1 WO2008084507 A1 WO 2008084507A1 IT 2007000547 W IT2007000547 W IT 2007000547W WO 2008084507 A1 WO2008084507 A1 WO 2008084507A1
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WO
WIPO (PCT)
Prior art keywords
column
fact
cylinder
stem
piston
Prior art date
Application number
PCT/IT2007/000547
Other languages
English (en)
Inventor
Leonardo Galloppa
Original Assignee
Lopez, Francesco
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Lopez, Francesco filed Critical Lopez, Francesco
Publication of WO2008084507A1 publication Critical patent/WO2008084507A1/fr

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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
    • 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
    • F03B13/1845—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 slides relative to the rem
    • F03B13/187—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 slides relative to the rem and the wom directly actuates the piston of a pump
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05B—INDEXING SCHEME RELATING TO WIND, SPRING, WEIGHT, INERTIA OR LIKE MOTORS, TO MACHINES OR ENGINES FOR LIQUIDS COVERED BY SUBCLASSES F03B, F03D AND F03G
    • F05B2240/00—Components
    • F05B2240/90—Mounting on supporting structures or systems
    • F05B2240/91—Mounting on supporting structures or systems on a stationary structure
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05B—INDEXING SCHEME RELATING TO WIND, SPRING, WEIGHT, INERTIA OR LIKE MOTORS, TO MACHINES OR ENGINES FOR LIQUIDS COVERED BY SUBCLASSES F03B, F03D AND F03G
    • F05B2240/00—Components
    • F05B2240/90—Mounting on supporting structures or systems
    • F05B2240/93—Mounting on supporting structures or systems on a structure floating on a liquid surface
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05B—INDEXING SCHEME RELATING TO WIND, SPRING, WEIGHT, INERTIA OR LIKE MOTORS, TO MACHINES OR ENGINES FOR LIQUIDS COVERED BY SUBCLASSES F03B, F03D AND F03G
    • F05B2260/00—Function
    • F05B2260/40—Transmission of power
    • F05B2260/406—Transmission of power through hydraulic systems
    • 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 system is adapted to the different sea conditions, with dynamic variations caused by tides, wave height and frequency.
  • the system according to the present invention can be advantageously applied to existing platforms that are used for different purposes, in order to provide them with energy autonomy or, alternatively, multiple systems can be realised, that is to say composed of a plurality of systems according to the present invention, with multiple productive units applied to the same support structure, possibly in submarine installation.
  • the system according to the present invention provides for the construction of a structure on the sea bottom, with one or more floats attached to the emerging part.
  • the floats are free to move in vertical direction, floating on the sea surface, and are pushed upwards by the waves, producing a force that is proportional to the weight of the water volume that is necessary for floating. This force is applied or transferred to pneumatic pistons attached to the structure for the production of compressed air.
  • - fig. 8 is a detailed view of a sliding means between floats and column according to the present invention
  • - figs. 9 and 10 show two different executive versions of the housing for the column provided in the float according to the present invention
  • - fig. 13 shows an executive detail of a piston according to the present invention
  • - fig. 15 is a side view of a column and of the upper and lower crowns according to the present invention.
  • - figs. 18 and 19 show the combination of a mobile upper crown and a so- called overturned piston
  • - fig. 20 shows a column provided with hydraulic positioner piston according to the present invention
  • - figs. 21 , 22, 23 and 24 show an upper crown provided with a rotating ring with internal thread, screwed on toothed bars in vertical position along the column;
  • - figs. 25, 26, 27 and 28 show an alternative executive version of an upper crown provided with a rotating ring with internal thread, screwed on toothed bars in vertical position along the column;
  • - figs. 29, 30, 31 show an additional executive version obtained with four vertical female screws screwed onto corresponding passages in the mobile crown;
  • - figs. 32 and 33 show an alternative position of a mobile crown on overturned pistons;
  • - figs. 34 and 35 show the combination of a mobile upper crown and a so- called straight piston
  • - figs. 40 and 41 show a combination of a fixed crown associated with a submergible platform or submergible support structure anchored to the sea bottom;
  • - figs. 42 and 43 show a combination of a fixed crown and a so-called submergible internal-guided platform
  • - fig. 44 shows a combination of a fixed crown and a so-called submergible external-guided platform
  • - fig. 45 shows a diagram of the hydropneumatic circuit according to the present invention
  • - fig. 46 shows an executive version of a tank for compressed air with variable volume and constant pressure according to the present invention
  • the oil expelled by the motor (38) is recovered in the tank (32) by means of the hydraulic directional-control valve (37) and the tank (32) that is being filled is maintained at atmospheric pressure until it is full, in order not to hinder filling.
  • the tank (31) When the tank (31) is almost empty, the tank (32) is full and therefore the pneumatic directional-control valve (36) pressurises it, while advantageously discharging the residual pressure in the tank (31) up to the atmospheric pressure. During this event, part of the air pressure is recovered in the reserve tanks (34) by means of the pneumatic circuit.
  • the pneumatic directional-control valve (36) which is controlled according to the oil level in the tanks, alternatively transforms either of the two tanks (31 , 32) from power source of the motor (38) to recovery tank for the discharged oil.
  • Both valves (36, 37) are advantageously and simultaneously operated by the same impulse to avoid discontinuity in powering the motor during the change.
  • Valves with proportional opening are advantageously provided, together with a piston accumulator installed upstream the motor, whose operating pressure is set by the compressed air of the pneumatic circuit.
  • pressurizable tank systems (34) are provided and powered by the excessive pressure in case of storms in order to generate an energy reserve that will power the generators when the sea is calm.
  • the reserve can be obtained in different advantageous versions and is a preferred solution to ensure constant production.
  • FIG. 1 , 2, 3, 4 illustrate four advantageous executive versions of a support structure used to support at least one column (5), either emerged or emergible, provided with at least one float (6) with possibility to slide, being operatively connected to a pneumatic piston (7) for production of compressed air.
  • the submergible platform can be immersed inside and/or outside the tower (4) that acts as a guide.
  • the emerging part of the support structure is composed of one or more columns (5), in which floats (6) are inserted to compress the pneumatic pistons (7) when pushed upwards by a wave.
  • the columns (5) may have any type of section, preferably a circular or polyhedric section.
  • a polyhedric section In case of columns with a polyhedric section, the presence of the sliding guides between the column and the float to prevent the float from rotating with respect to its vertical axis, as described below, is advantageously avoided.
  • Fig. 6 is a side view of a column (5) with float (6) and corresponding pneumatic piston (7).
  • This is basically the core of each production unit of compressed air and is composed of a column (5), a float (6) and one or more pneumatic pistons (7) with upper (8) and lower (9) attachment brackets, in crown configuration, being the so-called upper (8) and lower crown (9).
  • fig. 6 shows the preferred solution of multiple pistons that are operatively connected to the same column (5) by means of the said upper (8) and lower crown (9), in the three moments that correspond to the passage of the wave.
  • Figs. 7, 8, 9, and 10 show the preferred advantageous executive version of a float (6).
  • the dimensions of the float determine the useful force that is divided among different pistons.
  • the shape and volume of the float are important to take advantage of waves in any sea conditions.
  • the float has a spheroidal shape with slightly flattened poles to improve flotation and hydrodynamic penetrability.
  • the circular section allows the float to advantageously work with waves from any direction and offers a lower hydrodynamic resistance when the float is submerged by the wave in rough sea conditions.
  • the float (6) is provided with an opening (10) or housing, with cylindrical or any other suitable section, along its vertical axis used to insert the float (6) in the columns (5).
  • the opening (10) where the float (6) and the column (5) are interfaced is internally provided with a series of sliding guides, such as, without limitation, wheels or trolleys (11 ) that make vertical movements easier.
  • Vertical sliding guides (12) are inserted in case of circular columns.
  • the top of the float (6) is provided with brackets or lower crown (9) for the lower attachment of pistons (7), which are preferably arranged in circular configuration around the column (5).
  • the lower attachment crown (9) is circular.
  • Fig. 9 shows a float (6) with a cylindrical opening (10) or housing provided with sliding means (11 ), while fig. 10 shows a float (6) with a polygonal opening (10) or housing, with quadrangular section, provided with sliding means (11 ).
  • Figs.11 , 12, 13 and 14 show different executive versions of pneumatic pistons according to the present invention.
  • the pneumatic pistons basically transform the vertical force of the float in compressed air.
  • the pneumatic piston comprises a stem (13) that slides inside a cylinder (14) and ends inside the cylinder with a plunger (25), while the cylinder ends with a bottom (15) at the opposite end with respect to the coupling end of the stem.
  • this piston is in opposite position with respect to the straight piston and is provided with a stem (13) connected to the float (6) by means of the lower crown (9) and the cylinder connected to the upper crown (8).
  • the air is intercepted at the top of the cylinder (14), and therefore the intake valves (29) and delivery valves (30) are positioned in the bottom (15).
  • the piston has a mobile bottom (26) that slides inside the cylinder.
  • the position of the mobile bottom (26) can be varied to reach the height of the top dead centre of the plunger (25), thus changing the internal volume and the volumetric capacity of the piston.
  • the filling oil circuit (27) can be independent and fed by a pressurized tank or, alternatively, by a hydraulic shock-absorber (45) capable of pushing oil inside the cylinder (14) and recover it when it is ejected.
  • a pilot-operated valve (44) is provided to block the oil coming out of the cylinder, thus setting the mobile bottom (26) in position during the intake and compression of the air.
  • the same valve permits to introduce oil in the cylinder to replace the mobile bottom (26) at a lower height.
  • Figs. 15, 16 and 17 show the upper and lower crowns used to fix the pistons.
  • the lower (9) or upper (8) crown is a simple circular series of perforated plates that is used to fix the pistons.
  • the lower crown (9) is basically positioned at the top of the float (6) and the upper crown (8) can be provided with the possibility to move along the vertical axis of the column (5), being attached to it.
  • a crown of brackets fixed by means of a sliding guide (47) and provided with spring shock-absorber (46) can be provided.
  • the actuation of the shock-absorber (46) and the measure of the travel covered by the shock-absorber (46) can be considered as command for temporary adjustment to the sea conditions.
  • the maximum height of the wave determines the height of the top dead centre of the piston, and therefore it is preferable to move the bottom (15, 26) of the piston vertically (15,26), where the air is compressed, in order to position it the proximity of such a point.
  • the volume of the compression chamber of the cylinders is related with the travel, thus using the strength of the wave at best.
  • Figs. 18 and 19 show the combination of a mobile upper crown and a so-called overturned piston.
  • the assembly composed of float/pistons/upper crown is positioned at different heights along the column (5) that is fixed on the support structure.
  • the stems (13) are anchored on the float, while the liners or cylinders (14) in upper position are connected to the structure by means of a crown of brackets (8) that can be translated in vertical direction in order to position the bottom (15) in the proximity of the top dead centre of the travel of the plunger (25).
  • Figures from 20 to 31 show four preferred advantageous executive versions used to control the position of the upper mobile crown (8) of the pistons.
  • fig. 20 shows a first executive version that provides for a hydraulic positioner piston (28) inside the column (5), which is connected to the upper crown (8) by means of slots (16) on the column (5) or by means of suitable brackets; the said brackets provided between the positioner piston and the upper mobile crown (8) advantageously act as vertical guide for the mobile crown in order to avoid circular displacements.
  • Figs. 21 , 22, 23 and 24 show an upper crown (8) provided with a rotating ring (17) with internal thread, screwed on toothed bars (18) in vertical position along the column.
  • the circular motion of the threaded ring is transmitted by a vertical profiled shaft (19) engaged with a tooth wheel (20) that engages with the upper crown (8).
  • the rotation of the shaft is provided by a gear motor (21 ) installed on the top of the column (5).
  • the shaft is driven into rotation and, by means of the tooth wheel, it actuates the rotating ring (17) that, because of its thread, is moved vertically along the column, thus moving the upper crown (8).
  • Figs. 25, 26, 27, 28 show a preferred alternative executive version used to control the position of the upper mobile crown (8) of the pistons.
  • this alternative executive version provides for an upper crown (8) with an internally threaded rotating ring (17) that is screwed onto toothed bars (18) in vertical position along the column, as described and illustrated above for figures from 21 to 24.
  • This solution has the same characteristics as the solution that provides for the combination between a mobile crown and an overturned piston, as described and illustrated above, with the difference that the cylinder (14) of the pistons is connected to the float (6) and the stems (13) are connected to the column (5).
  • the intake (49) and delivery (48) pipes are obtained inside the stem, being preferably concentric, while the intake (29) and delivery (30) valves are preferably positioned in the thickness of the plunger (25).
  • An alternative advantageous solution provides for the combination of a fixed crown coupled with at least one piston with mobile bottom, as shown in figs. 36 and 37.
  • the constructive peculiarity of the piston is the presence of a mobile bottom (26) inside the cylinder that is positioned in the proximity of the top dead centre of the plunger (25) when sea conditions change.
  • the bottom is moved by an independent hydraulic circuit that introduces filling oil (27) in the liner (14), thus permitting fixing in position.
  • the compressed air is intercepted by means of the stem that is internally provided with two concentric chambers for intake (49) and delivery (48).
  • the intake and delivery valves are obtained in the thickness of the body of the plunger (25).
  • the liners or cylinders positioned on the float, that is to say straight pistons, are advantageously characterised by easy connection of the piston delivery to the installation.
  • the use of the mobile crown is advantageously avoided, since the operating height is reached by means of floodable tanks that change the gravitational position, while the presence of the structure eliminates the need for anchoring to the sea bottom.
  • Fig. 45 shows the diagram of the hydropneumatic circuit according to the present invention.
  • the figure shows the bottom (15) of the piston (7) where the check valves (29) and (30) for air intake in the piston and for delivery of compressed air towards the pressurization circuit of the tanks (31) and (32) are positioned.
  • a maximum pressure valve (33) is used to discharge the excessive pressure in the tank (34) that operates both as shock-absorber for pressure peaks and as pressure reserve.
  • the safety valve for overpressures (35) is also responsible for sequential filling in case of multiple reserve tanks. They feed the main circuit by means of the same valve (33) when the operating pressures falls within a threshold value in calm sea conditions.
  • This valve is controlled by the pressure of the reserve tanks (34) and set to direct the air discharged from the tank at the end of the cycle into the reserve tank, up to a certain pressure value.
  • the correct setting is a balance between the thrust pressure and the pressure necessary to fill the reserve tank. Beyond the threshold value, the effort made to overcome the filling pressure of the reserve tanks sets an excessive weight on the feeding pressure, thus negatively affecting the global efficiency of the circuit.
  • Fig. 46 shows a second executive version of a tank for compressed air, being a tank with constant pressure and variable volume, in particular a cylindrical tank anchored or fixed to the sea bottom.
  • a series of vertical cylinders (43) closed on top is anchored to the sea bottom and connected in such a way to be pressurized by the main circuit.
  • An expandable air bubble is formed inside the cylinder, whose pressure is counterbalanced by the sea pressure.
  • Fig. 47 shows an alternative executive version of a tank with constant pressure and variable volume, as one or more inflatable balloons.
  • a certain quantity of inflatable balloons (51 ) is connected in series at the necessary depth to obtain the desired pressure.
  • the external pressure of the water counterbalances the pressure of the accumulated air, while the elasticity of the membrane that forms the balloon guarantees constant outlet pressure.
  • the variation of the total volume of the reserve does not affect the pressure, being the latter maintained by the external pressure of the sea.
  • a system is provided to anchor the elastic balloons and/or submerged cylinders at variable heights in order to vary their internal pressure.
  • the circuit operates with a certain pressure P on the surface of the oil of the hydraulic circuit (50), after the phase change between the two tanks, from feeding tank in active phase to recovery tank in passive phase, before being completely discharged into the atmosphere, the residual pressure P of the empty tank is recovered up to a pressure value p ⁇ P set for convenience purposes for final efficiency, meaning that the recovered pressure p is limited to such a value that recovery is not too difficult for the main pressure P to overcome the pressure of the reserve where recovery occurs.
  • the recovery of the air discharged by the tank (31 ) or (32) should be started at a low counterpressure height, that is to say with the minimum immersion of the tank, in order to initially receive most of pressure P.

Abstract

L'invention concerne un système de production d'électricité à partir de l'énergie des vagues qui comprend une structure sous-marine qui porte des colonnes émergeant de la mer. Des flotteurs, dotés de coulisseaux ou de roues coulissantes, sont attachés aux colonnes et déplacés verticalement par les vagues. Une force est produite et transmise à des pistons pneumatiques qui sont disposés verticalement le long de la colonne. La production résultante d'air comprimé, la quantité excessive étant stockée, est utilisée pour alimenter alternativement deux réservoirs qui mettent sous pression l'huile du circuit hydraulique et qui sont alternativement utilisés en tant que réservoir pour alimenter le moteur ou le réservoir pour récupérer l'huile déchargée. L'huile sous pression est utilisée pour alimenter un ou plusieurs moteurs hydrauliques reliés à des alternateurs.
PCT/IT2007/000547 2007-01-10 2007-07-31 Système de production d'électricité à partir de l'énergie des vagues WO2008084507A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT000002A ITCH20070002A1 (it) 2007-01-10 2007-01-10 Sistema per la generazione di energia elettrica dal moto ondoso marino
ITCH2007A000002 2007-01-10

Publications (1)

Publication Number Publication Date
WO2008084507A1 true WO2008084507A1 (fr) 2008-07-17

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Application Number Title Priority Date Filing Date
PCT/IT2007/000547 WO2008084507A1 (fr) 2007-01-10 2007-07-31 Système de production d'électricité à partir de l'énergie des vagues

Country Status (2)

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IT (1) ITCH20070002A1 (fr)
WO (1) WO2008084507A1 (fr)

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CN101806273A (zh) * 2010-03-23 2010-08-18 蔡德洋 一种潮汐发电装置
US7900444B1 (en) 2008-04-09 2011-03-08 Sustainx, Inc. Systems and methods for energy storage and recovery using compressed gas
US7958731B2 (en) 2009-01-20 2011-06-14 Sustainx, Inc. Systems and methods for combined thermal and compressed gas energy conversion systems
US7963110B2 (en) 2009-03-12 2011-06-21 Sustainx, Inc. Systems and methods for improving drivetrain efficiency for compressed gas energy storage
WO2011075795A1 (fr) * 2009-12-24 2011-06-30 Oceanlinx Ltd. Système d'extraction d'énergie des vagues utilisant une colonne d'eau oscillante fixée aux colonnes d'une plateforme marine
US8037678B2 (en) 2009-09-11 2011-10-18 Sustainx, Inc. Energy storage and generation systems and methods using coupled cylinder assemblies
US8046990B2 (en) 2009-06-04 2011-11-01 Sustainx, Inc. Systems and methods for improving drivetrain efficiency for compressed gas energy storage and recovery systems
US8104274B2 (en) 2009-06-04 2012-01-31 Sustainx, Inc. Increased power in compressed-gas energy storage and recovery
US8117842B2 (en) 2009-11-03 2012-02-21 Sustainx, Inc. Systems and methods for compressed-gas energy storage using coupled cylinder assemblies
US8171728B2 (en) 2010-04-08 2012-05-08 Sustainx, Inc. High-efficiency liquid heat exchange in compressed-gas energy storage systems
US8191362B2 (en) 2010-04-08 2012-06-05 Sustainx, Inc. Systems and methods for reducing dead volume in compressed-gas energy storage systems
US8225606B2 (en) 2008-04-09 2012-07-24 Sustainx, Inc. Systems and methods for energy storage and recovery using rapid isothermal gas expansion and compression
US8234863B2 (en) 2010-05-14 2012-08-07 Sustainx, Inc. Forming liquid sprays in compressed-gas energy storage systems for effective heat exchange
US8240146B1 (en) 2008-06-09 2012-08-14 Sustainx, Inc. System and method for rapid isothermal gas expansion and compression for energy storage
US8240140B2 (en) 2008-04-09 2012-08-14 Sustainx, Inc. High-efficiency energy-conversion based on fluid expansion and compression
US8250863B2 (en) 2008-04-09 2012-08-28 Sustainx, Inc. Heat exchange with compressed gas in energy-storage systems
EP2516843A1 (fr) * 2009-12-23 2012-10-31 Nader Hassavari Dispositif de centrale
US8448433B2 (en) 2008-04-09 2013-05-28 Sustainx, Inc. Systems and methods for energy storage and recovery using gas expansion and compression
US8474255B2 (en) 2008-04-09 2013-07-02 Sustainx, Inc. Forming liquid sprays in compressed-gas energy storage systems for effective heat exchange
US8479505B2 (en) 2008-04-09 2013-07-09 Sustainx, Inc. Systems and methods for reducing dead volume in compressed-gas energy storage systems
US8495872B2 (en) 2010-08-20 2013-07-30 Sustainx, Inc. Energy storage and recovery utilizing low-pressure thermal conditioning for heat exchange with high-pressure gas
US8539763B2 (en) 2011-05-17 2013-09-24 Sustainx, Inc. Systems and methods for efficient two-phase heat transfer in compressed-air energy storage systems
US8578708B2 (en) 2010-11-30 2013-11-12 Sustainx, Inc. Fluid-flow control in energy storage and recovery systems
US8667792B2 (en) 2011-10-14 2014-03-11 Sustainx, Inc. Dead-volume management in compressed-gas energy storage and recovery systems
US8677744B2 (en) 2008-04-09 2014-03-25 SustaioX, Inc. Fluid circulation in energy storage and recovery systems
US8733095B2 (en) 2008-04-09 2014-05-27 Sustainx, Inc. Systems and methods for efficient pumping of high-pressure fluids for energy
EP2708730A3 (fr) * 2012-09-14 2014-08-27 Yun-Chang Yu Dispositif de conversion d'énergie des vagues
FR3024167A1 (fr) * 2014-07-25 2016-01-29 Patrice Christian Philippe Charles Chevalier Marinolienne posee autonome a production continue et procedes associes
US10787783B2 (en) 2016-06-23 2020-09-29 Red to Blue Limited System and method for extracting power from tides

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