WO2004005706A1 - Plant for producing electric energy from sea wave movement - Google Patents

Plant for producing electric energy from sea wave movement Download PDF

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Publication number
WO2004005706A1
WO2004005706A1 PCT/IT2002/000505 IT0200505W WO2004005706A1 WO 2004005706 A1 WO2004005706 A1 WO 2004005706A1 IT 0200505 W IT0200505 W IT 0200505W WO 2004005706 A1 WO2004005706 A1 WO 2004005706A1
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WO
WIPO (PCT)
Prior art keywords
sea
plant
energy
waves
oil
Prior art date
Application number
PCT/IT2002/000505
Other languages
French (fr)
Inventor
Francesco Paolo Terranova
Original Assignee
Francesco Paolo Terranova
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 Francesco Paolo Terranova filed Critical Francesco Paolo Terranova
Priority to AU2002336016A priority Critical patent/AU2002336016A1/en
Priority to EP02770167A priority patent/EP1520103A1/en
Publication of WO2004005706A1 publication Critical patent/WO2004005706A1/en

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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
    • F03B13/1885—Adaptations of machines or engines for special use; Combinations of machines or engines with driving or driven apparatus; Power stations or aggregates characterised by using wave or tide energy using wave energy using the relative movement between a wave-operated member, i.e. a "wom" and another member, i.e. a reaction member or "rem" where the other member, i.e. rem is fixed, at least at one point, with respect to the sea bed or shore and the wom is tied to the rem
    • 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 invention concerns the means for extracting and using natural forms of energy, such as wind, solar, sea wave and tidal. Though presenting enormous potentials these forms of energy are difficult and at times impossible to harness because of their dispersal, lack of continuity, and other structural and climatic problems.
  • the above invention solves the difficulty of extracting energy from the waves of the sea, using means and processes adaptable to the characteristics of this form of energy so as to make a simple and efficient use of it, as will here be explained.
  • Subject of the invention is a plant for extracting the energy produced by the movement of sea water, transforming it into electric current.
  • the alternating and discontinuous movement of waves is transferred by means of kinetic mechanisms, from one or more floats to devices for extracting this energy, either rotating or making a see-saw movement, and to means for accumulating it for continuous supply to equipment where it may be used.
  • the plant comprises one or more devices having a piston which, kinetically connected to one or more floats, at each phase of alternate motion and by recycling oil in a tank, operates a hydraulic engine connected to a dynamo.
  • the device comprises a pair of chambers created by the piston between the base and head of a cylinder.
  • oil is drawn up from the tank into the first chamber of said pair; at the same time oil, drawn up by the second chamber of said pair in a preceding phase, passes through tubes to the input opening of a hydraulic engine, returning to the tank through a tube connected to the output opening of said engine.
  • the two chambers formed by piston movement are connected, through branch tubes comprising single-acting valves, with a tube for carrying oil to the engine.
  • the oil tank is connected by a tube and two pipe unions, fitted with single-acting valves, to said branch tubes in the section between the cylinder and said valves.
  • the piston is connected to a float by a cable guided by a transmission pulley turning freely on a short horizontal shaft and is controlled by a return spring so that float movement is determined in one direction by the pull on the cable, and in the opposite direction by the return spring.
  • the devices are laid on the sea floor and present a water-tight structure which includes a bracket to support the pulley shaft.
  • the devices are installed on the sea shore and present a structure including a column to support the pulley shaft.
  • the float is preferably parallelepiped in shape with a square base.
  • the plant is installed on a boat.
  • the device comprises a cylinder whose piston is connected to a float placed externally on the sides of said boat, enabled to move vertically by means of a rocker arm moving freely on a support fixed to said sides.
  • the device comprises two cylinders and therefore two pairs of chambers formed by the pistons between the base and head of the cylinders, respectively connected by a first and second pair of branch tubes, respectively fitted with valves, to a tube carrying oil from the tank to the hydraulic engine.
  • Said oil tank is connected through a main tube to two branch tubes these being connected, through a first pair of pipe unions fitted with valves, to a first pair of branch tubes and, through a second pair of pipe unions, to the second pair of branch tubes in the sections between the cylinders and their valves.
  • oil is drawn from the tank into the first pair of chanbers and simultaneously oil, drawn up by the second pair of chambers during the preceding phase, passes through a tube into the input aperture of a hydraualic engine, returning to the tank through a tube connected to the output aperture of said engine.
  • a chamber of varying volume is fitted onto the tube connected to the input aperture of the hydraulic engine, said chamber forming part of a device for compensating irregularities in the quantity of oil drawn up from the tank.
  • Said chamber is formed in a cylinder by a freely moving piston that separates it from a second chamber containing gas under pressure.
  • the gas is preferably C0 2 .
  • the invention offers evident advantages.
  • Fig. 1 Plant for extracting energy from sea wave movement by means of a float and devices laid on the sea floor, cross section;
  • Fig. 2 As above, plan view.
  • Fig. 3 Device while the float is deseeding, longitudinal section.
  • Fig. 5 The plant mounted on a boat, perspective with detail.
  • Fig. 6 The plant in Figure 5, cross section.
  • Fig. 7 The plant in Figure 1 with devices installed on the sea shore, cross section.
  • Fig. 8 As above, plan view.
  • Figure 1 shows a plant 10 for extracting energy from ocean waves 11 by means of the parallelipiped-shaped float 20 connected by cables
  • Figure 2 shows how the cables 21 are connected through half-rings 23 and eyeholes 22, to the rings 24.
  • each cable 21 is joined by the transmission pulley
  • the piston 41 in a double-acting propulsor cylinder 40 (Fiigures 3, 4).
  • the piston 41 divides the- cylinder 40 into two chambers, an upper one 45 and a lower one 46, supporting the cylindrical cage 47 at the top.
  • Between the bottom 48 of said cage and the disk 49 fixed to the rod 42 of the piston 41 is a helical cylindrical spring 50. It follows that, when a wave raises the float 20, the pull on the cable 21 raises the piston 41 and compresses the spring 50 ( Figure 3) while, when the float is moving downward, the spring 50 ( Figure 4) depresses the piston and keeps the cable 21 tense. It is therefore wave movement that determines piston movement.
  • the device 30 also comprises an oil tank 55 with a level 57 and a cylindrical compensator 60 with a free piston 61 that divides it into two chambers, an upper chamber 65 and a lower chamber 66.
  • the upper chamber 65 is filled with C0 2 .
  • the lower chamber 66 is connected to the tube 88 that receives two branch tubes 80 and 85 respectively connected to the chambers 45 and 46 of the cylinder 40 and fitted with single-acting valves, 81 and 86 respectively.
  • these branch tubes 80 and 85 are respectively connected by sections of tubes 72 and 74, respectively comprising single-acting valves 73 and 75, to the tube 70 in turn connected to the oil tank 55.
  • the lower chamber 66 of the compensator 60 is also connected, by a delivery tube 67, to the hydraulic engine 90 whose shaft is joined by a connector 94 to the shaft of a dynamo 95.
  • the oil that flows into chamber 66 of the compensator 60 is maintained under pressure by the free piston 61 , itself under pressure from the CO 2 gas in the chamber 65 of said compensator, and passes through the tube 67 into the hydraulic engine 90.
  • the oil discharged by said engine returns to the tank 55 through the tube 91.
  • the C0 2 compensates irregularities in the flow of oil to the chamber 66, caused by irregularity of wave movements, so that oil feed to the hydraulic engine 90 is steady and continuous. It will be seen that all the devices 30 combine to produce continuous conversion of energy from sea water into electric current that reaches land through the underwater cables 96, 97 ( Figure 1 ) making possible a continuous supply to take-off points.
  • FIGS 5 and 6 illustrate a plant 110 installed on a boat 100.
  • This plant comprises a device 111 inside the hull 101 and external kinematic means 112 on its sides 102 to derive energy from wave movement 11.
  • These external kinematic means 112 comprise supports 113 for free rotation, on a pin 115 of the upper fork 114, of rocker arms 116, their ends outside the hull being joined by an articulation 125 to rods 118 freely sliding in supporting arms 117 fixed to the sides 102 of the boat. At their lower ends said rods 118 are connected, by supports 122, to the floats 120.
  • the device 111 inside the hull 109 comprises cylinders 130, 140 served by pistons 131 , 141 that respectively create upper chambers 135 and 145, and lower chambers 136 and 146.
  • the rocker arms 116 are joined by an articulation 119, at each inner end to the respective rods 132 , 142, of pistons 131 , 141.
  • the plant also comprises a tank 55 for oil and a cylindrical compensator 60 divided by the freely moving piston 61 into two chambers 65 and 66.
  • the chamber 65 is filled with CO 2 .
  • Chamber 66 communicates through the tube 210 connected both to chambers 135, 145 of the cylinders 130, 140 by the pair of branch tubes 190 and 200, respectively fitted with valves 191 , 201 , and with chambers 136, 146 of said cylinders through the pair of branch tubes 195 and 205, respectively fitted with valves 196, 206.
  • Said pairs of branch tubes 190, 200 and 195, 205 are respectively connected, in their sections between cylinders and valves, by connectors 173, 183 fitted with valves 174, 184 and by connectors 175, 185 fitted with valves 176, 186, to branch tubes 171 and 172 of the tube 170 to the oil tank 55.
  • Said chamber 66 of the compensator 60 also communicates through the delivery tube 67 with the input aperture of the hydraulic engine 90 whose shaft is connected by a coupling 94 to the shaft of the dynamo 95.
  • the output aperture of the engine is connected to the tank 55 by a return tube 91.
  • FIG. 7 and 8 illustrate a plant 14 similar to that described and illustrated in Figures 1-4, except that the devices 30 for deriving energy from sea water movement are installed on the shore 15.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Other Liquid Machine Or Engine Such As Wave Power Use (AREA)

Abstract

Plant (10) for utilization of energy from the waves (11) of the sea in which the alternating and discontinuous movement of said waves (11) is transferred from one or more floats (20) by means of kinematic mechanisms (21), to devices making a rotating or see-saw movement (30) for receiving said energy, and to means for accumulating it and preparing it for continuous conveyance to take-off points where it may be used.

Description

Plant for producing electric energy from sea wave movement
The invention concerns the means for extracting and using natural forms of energy, such as wind, solar, sea wave and tidal. Though presenting enormous potentials these forms of energy are difficult and at times impossible to harness because of their dispersal, lack of continuity, and other structural and climatic problems. The above invention solves the difficulty of extracting energy from the waves of the sea, using means and processes adaptable to the characteristics of this form of energy so as to make a simple and efficient use of it, as will here be explained.
Subject of the invention is a plant for extracting the energy produced by the movement of sea water, transforming it into electric current. The alternating and discontinuous movement of waves is transferred by means of kinetic mechanisms, from one or more floats to devices for extracting this energy, either rotating or making a see-saw movement, and to means for accumulating it for continuous supply to equipment where it may be used. In one advantageous execution the plant comprises one or more devices having a piston which, kinetically connected to one or more floats, at each phase of alternate motion and by recycling oil in a tank, operates a hydraulic engine connected to a dynamo.
The device comprises a pair of chambers created by the piston between the base and head of a cylinder. At each phase of alternate motion'made by the piston, oil is drawn up from the tank into the first chamber of said pair; at the same time oil, drawn up by the second chamber of said pair in a preceding phase, passes through tubes to the input opening of a hydraulic engine, returning to the tank through a tube connected to the output opening of said engine.
The two chambers formed by piston movement are connected, through branch tubes comprising single-acting valves, with a tube for carrying oil to the engine.
The oil tank is connected by a tube and two pipe unions, fitted with single-acting valves, to said branch tubes in the section between the cylinder and said valves.
The piston is connected to a float by a cable guided by a transmission pulley turning freely on a short horizontal shaft and is controlled by a return spring so that float movement is determined in one direction by the pull on the cable, and in the opposite direction by the return spring.
In one type of execution the devices are laid on the sea floor and present a water-tight structure which includes a bracket to support the pulley shaft. In another execution the devices are installed on the sea shore and present a structure including a column to support the pulley shaft.
The float is preferably parallelepiped in shape with a square base.
There are four devices, one at each corner of the float.
In another type of execution the plant is installed on a boat. The device comprises a cylinder whose piston is connected to a float placed externally on the sides of said boat, enabled to move vertically by means of a rocker arm moving freely on a support fixed to said sides.
Advantageously the device comprises two cylinders and therefore two pairs of chambers formed by the pistons between the base and head of the cylinders, respectively connected by a first and second pair of branch tubes, respectively fitted with valves, to a tube carrying oil from the tank to the hydraulic engine.
Said oil tank is connected through a main tube to two branch tubes these being connected, through a first pair of pipe unions fitted with valves, to a first pair of branch tubes and, through a second pair of pipe unions, to the second pair of branch tubes in the sections between the cylinders and their valves.
During each phase of alternating piston movement oil is drawn from the tank into the first pair of chanbers and simultaneously oil, drawn up by the second pair of chambers during the preceding phase, passes through a tube into the input aperture of a hydraualic engine, returning to the tank through a tube connected to the output aperture of said engine.
A chamber of varying volume is fitted onto the tube connected to the input aperture of the hydraulic engine, said chamber forming part of a device for compensating irregularities in the quantity of oil drawn up from the tank.
Said chamber is formed in a cylinder by a freely moving piston that separates it from a second chamber containing gas under pressure. The gas is preferably C02.
The invention offers evident advantages.
By means of this plant, whether laid on the sea floor, set up on shore or mounted on a boat, energy can be continuously extracted from the waves, partly thanks to the presence of the chambers filled with CO2 on the compensator that transfers oil under pressure to the hydraulic engine. In this way there is continuous generation of electric energy obtained from conversion of mechanical energy produced by natural phenomena, overcoming the previously mentioned problems of the dispersal and discontinuity of production of energy in its natural forms.
Characteristics and purposes of the disclosure will be made still clearer by the following examples of its execution illustrated by diagrammatically drawn figures.
Fig. 1 Plant for extracting energy from sea wave movement by means of a float and devices laid on the sea floor, cross section;
Fig. 2 As above, plan view.
Fig. 3 Device while the float is deseeding, longitudinal section.
Fig. 4 As above, while the float is rising.
Fig. 5 The plant mounted on a boat, perspective with detail. Fig. 6 The plant in Figure 5, cross section.
Fig. 7 The plant in Figure 1 with devices installed on the sea shore, cross section.
Fig. 8 As above, plan view.
Figure 1 shows a plant 10 for extracting energy from ocean waves 11 by means of the parallelipiped-shaped float 20 connected by cables
21 , through eyeholes 22 and half-rings 23 at its four corners, to devices 30 of a box-shaped water-tight structure 31 , laid on the sea floor 12.
Figure 2 shows how the cables 21 are connected through half-rings 23 and eyeholes 22, to the rings 24.
In said devices, each cable 21 is joined by the transmission pulley
35, carried by the bracket 34 and support 33 on the head 32 of the structure 31 , to the ring 43 fixed to the top of the rod 42 of the piston
41 in a double-acting propulsor cylinder 40 (Fiigures 3, 4). The piston 41 divides the- cylinder 40 into two chambers, an upper one 45 and a lower one 46, supporting the cylindrical cage 47 at the top. Between the bottom 48 of said cage and the disk 49 fixed to the rod 42 of the piston 41 is a helical cylindrical spring 50. It follows that, when a wave raises the float 20, the pull on the cable 21 raises the piston 41 and compresses the spring 50 (Figure 3) while, when the float is moving downward, the spring 50 (Figure 4) depresses the piston and keeps the cable 21 tense. It is therefore wave movement that determines piston movement. The device 30 also comprises an oil tank 55 with a level 57 and a cylindrical compensator 60 with a free piston 61 that divides it into two chambers, an upper chamber 65 and a lower chamber 66. The upper chamber 65 is filled with C02.
The lower chamber 66 is connected to the tube 88 that receives two branch tubes 80 and 85 respectively connected to the chambers 45 and 46 of the cylinder 40 and fitted with single-acting valves, 81 and 86 respectively.
Between the valves and the cylinder, these branch tubes 80 and 85 are respectively connected by sections of tubes 72 and 74, respectively comprising single-acting valves 73 and 75, to the tube 70 in turn connected to the oil tank 55. The lower chamber 66 of the compensator 60 is also connected, by a delivery tube 67, to the hydraulic engine 90 whose shaft is joined by a connector 94 to the shaft of a dynamo 95.
It will be clear from the foregoing that when, in one stage, the float 20 rises and the cable 21 moves the piston 41 towards the upper chamber 45 of the propulsor cylinder 40 (Figure 3), the oil, that entered it during the preceding phase, is forced to pass through the tube 80 and single-acting valve 81 , into the tube 88 and from there into the lower chamber 66 of the compensator 60. At the same time oil from the tank 55, flows through the tube 70, connector 74 and single-acting valve 75 into the lower chamber 46 of said cylinder 40. When the float 20 is lowered, and the spring 50 depresses the piston 41 (Figure 4), the oil in the lower chamber 46 of the cylinder 40 flows though the branch tube 85 and single-acting valve 86 into the tube 88 and from there into chamber 66 of the compensator 60. At the same time oil in the tank 55 flows through the tube 70, through the connector 72 and single-acting valve 75 into the upper chamber 45 of the cylinder 40.
The oil that flows into chamber 66 of the compensator 60 is maintained under pressure by the free piston 61 , itself under pressure from the CO2 gas in the chamber 65 of said compensator, and passes through the tube 67 into the hydraulic engine 90. The oil discharged by said engine returns to the tank 55 through the tube 91. Through the piston 61 , the C02 compensates irregularities in the flow of oil to the chamber 66, caused by irregularity of wave movements, so that oil feed to the hydraulic engine 90 is steady and continuous. It will be seen that all the devices 30 combine to produce continuous conversion of energy from sea water into electric current that reaches land through the underwater cables 96, 97 (Figure 1 ) making possible a continuous supply to take-off points.
As an alternative to the plant described above, Figures 5 and 6 illustrate a plant 110 installed on a boat 100. This plant comprises a device 111 inside the hull 101 and external kinematic means 112 on its sides 102 to derive energy from wave movement 11. These external kinematic means 112 comprise supports 113 for free rotation, on a pin 115 of the upper fork 114, of rocker arms 116, their ends outside the hull being joined by an articulation 125 to rods 118 freely sliding in supporting arms 117 fixed to the sides 102 of the boat. At their lower ends said rods 118 are connected, by supports 122, to the floats 120. The device 111 inside the hull 109 comprises cylinders 130, 140 served by pistons 131 , 141 that respectively create upper chambers 135 and 145, and lower chambers 136 and 146. The rocker arms 116 are joined by an articulation 119, at each inner end to the respective rods 132 , 142, of pistons 131 , 141.
The plant also comprises a tank 55 for oil and a cylindrical compensator 60 divided by the freely moving piston 61 into two chambers 65 and 66. The chamber 65 is filled with CO2. Chamber 66 communicates through the tube 210 connected both to chambers 135, 145 of the cylinders 130, 140 by the pair of branch tubes 190 and 200, respectively fitted with valves 191 , 201 , and with chambers 136, 146 of said cylinders through the pair of branch tubes 195 and 205, respectively fitted with valves 196, 206. Said pairs of branch tubes 190, 200 and 195, 205 are respectively connected, in their sections between cylinders and valves, by connectors 173, 183 fitted with valves 174, 184 and by connectors 175, 185 fitted with valves 176, 186, to branch tubes 171 and 172 of the tube 170 to the oil tank 55. Said chamber 66 of the compensator 60 also communicates through the delivery tube 67 with the input aperture of the hydraulic engine 90 whose shaft is connected by a coupling 94 to the shaft of the dynamo 95. The output aperture of the engine is connected to the tank 55 by a return tube 91.
In this way, when pistons 131 , 141 respectively in cylinders 130 and 140, rise (Figure 6) because of downward movement of the floats 120, the oil, contained in chambers 135 and 145 of said cylinders from the preceding phase, flows through branch tubes 190 and 200, valves 191 and 201 , and the central tube 210 with its valve 211 , into chamber 66 of the compensator 60. At the same time oil in the tank 55 flows through tube 170, branch tubes 171 and 172, connectors 175 and 185, valves 176 and 186 and branch tubes 195 and 205, to chambers 136 and 146 respectively in cylinders 130 and 140. When the above pistons descend due to upward movement of the floats 120, the oil in cylinder chambers 136 and 146 flows through branch tubes 195 and 205, valves 196 and 206 and tube 210 into the chamber 66 of said compensator 60. At the same time oil in the tank 55 flows through the tube 170, through branch tubes 171 and 172, connectors 173 and 183, valves 174 and 184 and branch tubes 190 and 200 into the chambers 135 and 145 of said cylinders 130 and 140 respectively. Figures 7 and 8 illustrate a plant 14 similar to that described and illustrated in Figures 1-4, except that the devices 30 for deriving energy from sea water movement are installed on the shore 15.
As said devices are higher than the float 20, the cables 21 connected to rods 42 of pistons 41 (see Figures 3, 4) are guided by transmission pulleys 35 supported by the column 38 mounted on the head 32 of the box-shaped structure 37 holding the devices. As the above disclosure has been described solely as an example in order to explain its essential features, it is understood that numerous changes can be made according to industrial, commercial or other requirements, while other systems and means can be included in it without thereby implying departure from its sphere of operation. It must therefore be understood that the application for priority comprises any equivalent use of the concepts and any equivalent product executed and/or in operation according to any one or more of the characteristics described in the following claims.

Claims

1. Plant (10, 14, 110) for utilization of energy from the waves (11 ) of the sea, characterized in that the alternating and discontinuous movement of the waves (11 ) is transferred by kinematic means (21 , 112) from one or more floats (20, 120) to devices that rotate or execute an alternating motion (30, 111 ) for extracting said energy and to means
(55, 60) for accumulating and preparing it for continuous transfer to take-off points 90.
2. Plant (10, 14, 110) for utilization of energy from the waves (11 ) of the sea, characterized in that it comprises one or more devices (30, 111 ) provided with a cylinder (40, 130, 140) whose piston (41 , 131 , 141 ), kinematically connected to one or more floats (20, 120) operates, at each phase of alternating motion, by recycling oil contained in a tank
(55), a hydraulic engine (90) connected to a dynamo (95).
3. Plant (10, 14,) for utilization of energy from the waves (11 ) of the sea, as in claim 2, characterized in that the device (30) comprises a pair of chambers (45,46) created by the piston (41 ) between the bottom and head of a cylinder (40), simultaneously determining at each phase of alternate motion of the piston (41 ) both transfer of oil by suction from the tank (55) to the first chamber of said pair of chambers (45,46) and also entry of oil drawn up by the second chamber of said pair of chambers in a preceding phase, through tubes (88, 67) to the input aperture of a hydraulic engine (90), the oil returning to its tank (55) through a tube (91 ) connected to the output aperture of said engine (90).
4. Plant (10, 14) for utilization of energy from the waves (11 ) of the sea, as in claim 3, characterized in that the chambers (45,46) created by the piston (41 ) are respectively connected by branch tubes (80, 85) respectively comprising single-acting valves (81 , 86), to a tube (88) through which oil flows to the engine (90), and in that the oil tank (55) is connected by two connectors (72, 74) fitted with single-acting valves (73, 75) on a tube (70) to said two branch' tubes (80, 85) in their sections between the cylinder (40) and said valves (81 , 86).
5. Plant (10, 14) for utilization of energy from the waves (11 ) of the sea, as in claim 3, characterized in that the piston (41 ) is connected to a float (20) by means of a cable (21 ) guided by a transmission pulley (35) freely turning on a horizontal shaft and is controlled by a return spring (50) so that its movement is determined in one direction by the pull of the cable (21 ) and in the opposite direction by the return spring (50).
6. Plant (10) for utilization of energy from the waves (11 ) of the sea as in claims 2-5, characterized in that the devices (30) are laid on the sea floor (12) and present a structure (31 ) made water-tight and provided with a bracket (34) to support the shaft of the pulley (35).
7. Plant (14) for utilization of energy from the waves (11 ) of the sea as in claims 2-5, characterized in that the devices (30) are installed on the sea shore and present a structure (37) with a column (38) to carry the shaft of the pulley (35).
8. Plant (10,14) for utilization of energy from the waves (11 ) of the sea, as in claim 2, characterized in that the float (20) is of a substantially parallelepiped structure with a square base.
9. Plant (10, 14) for utilization of energy from the waves (11 ) of the sea, as in claims 2 and 8, characterized in that there are four devices (30), these being installed at the four corners of the float (20).
10. Plant (110) for utilization of energy from the waves (11 ) of the sea, as in claim 2, characterized in that it is installed on a boat (100) and in that the device (111 ) comprises a piston (131 ) of a cylinder (130) connected to a float (120) placed externally on the sides (102) of said boat (100) free to move vertically by means of a rocker arm (112) freely turning on a support (114) placed on said sides (102).
11. Plant (110) for utilization of energy from the waves (11 ) of the sea as in claims 2 and 10, characterized in that the device (111 ) comprises two pairs (135,136) (145,146) of chambers created by pistons (131 ), (141 ) between the base and the head of the cylinders (130), (140) respectively connected by a first pair (190,201 ) and a second pair(195,205) of branch tubes, respectively fitted with valves (191 ,201 ) (196,206) and with tubes (210) (67) for transfer of oil from the tank (55) to the hydraulic engine (90) and in that said oil tank (55) connects up through a tube (170), with two branch tubes (171 , 172) in turn connected by a first pair of connectors (173,183) fitted with valves (174, 184), to the first pair of branch tubes (190, 201 ) and by means of a second pair of connectors (175,185) to the second pair of branch tubes (195,205) in their sections between the cylinders (130), (140) and their valves (191 ,201 ), (196, 206), simultaneously determining, at each fase of alternate motion of the pistons (131 , 141 ), both transfer by suction of oil from the tank (55) to the first of the paired chambers (135,136) (145,146), and entry of oil, drawn up by the second of the paired chambers, during the preceding phase, through tubes (210) (67), to the input aperture of a hydraulic engine (90), the oil then returning to the tank (55) through a tube (91 ) connected to the output aperture of said engine (90).
12. Plant (10, 14, 110) for utilization of energy from the waves (11 ) of the sea, as in claims 3 and 11 , characterized in that, placed between the tubes (88, 67) (210, 67) for entry of oil into the input aperture of the hydraulic engine (90), is a chamber (66) of variable volume, part of a device (60) for compensating irregularities in the quantity of oil flowing into said chamber (66).
13. Plant (10, 14, 110) for utilization of energy from the waves (11 ) of the sea, as in claim 12, characterized in that the chamber (66) of variable volume is formed in a cylinder by a freely moving piston (61 ) that separates said chamber (66) from a second chamber (65) containing gas under pressure.
14. Plant (10, 14, 110) for utilization of energy from the waves (11 ) of the sea, as in claim 13, characterized in that the gas is C02.
PCT/IT2002/000505 2002-07-04 2002-07-30 Plant for producing electric energy from sea wave movement WO2004005706A1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
AU2002336016A AU2002336016A1 (en) 2002-07-04 2002-07-30 Plant for producing electric energy from sea wave movement
EP02770167A EP1520103A1 (en) 2002-07-04 2002-07-30 Plant for producing electric energy from sea wave movement

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITMI2002A001467 2002-07-04
IT2002MI001467A ITMI20021467A1 (en) 2002-07-04 2002-07-04 PLANT TO PRODUCE ELECTRICITY FROM THE MOVEMENT OF THE SEA WAVES

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WO2004005706A1 true WO2004005706A1 (en) 2004-01-15

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Publication number Priority date Publication date Assignee Title
FR2895466A1 (en) * 2005-12-22 2007-06-29 Olaf Rene Zalcman Wave/swell energy exploiting device for e.g. industrial field, has transformation apparatuses actuated by rotating units that are supported by floating structure, and conductor agents placed between floating structure and shore
CN105888951A (en) * 2016-04-06 2016-08-24 福建爱迪生科技有限公司 Marine electricity generating device

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GB9008752D0 (en) * 1990-04-18 1990-06-13 Boc Group Plc Air separation

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FR678551A (en) * 1926-09-18 1930-04-02 Device for using wave energy
US3918260A (en) * 1974-12-30 1975-11-11 Klaus M Mahneke Waved-powered driving apparatus
FR2339071A1 (en) * 1976-01-20 1977-08-19 Comte Cyrille Power converting machine using energy of ocean waves - uses rise and fall of floating body to drive rotating shaft
GB2031527A (en) * 1978-09-18 1980-04-23 Hopfe H A device for extracting hydrodynamic energy from waves
US4453894A (en) * 1977-10-14 1984-06-12 Gabriel Ferone Installation for converting the energy of the oceans
FR2541730A1 (en) * 1982-01-13 1984-08-31 Faure Michel Module for converting marine energy into electrical energy
US4754157A (en) * 1985-10-01 1988-06-28 Windle Tom J Float type wave energy extraction apparatus and method
FR2808844A1 (en) * 2000-05-10 2001-11-16 Michel Albert Pioche Conversion of wave energy from the sea to electrical energy, uses multiple float operated pumps resting on sea bed to deliver water through collective pipe to generating station on the shore

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Publication number Priority date Publication date Assignee Title
FR678551A (en) * 1926-09-18 1930-04-02 Device for using wave energy
US3918260A (en) * 1974-12-30 1975-11-11 Klaus M Mahneke Waved-powered driving apparatus
FR2339071A1 (en) * 1976-01-20 1977-08-19 Comte Cyrille Power converting machine using energy of ocean waves - uses rise and fall of floating body to drive rotating shaft
US4453894A (en) * 1977-10-14 1984-06-12 Gabriel Ferone Installation for converting the energy of the oceans
GB2031527A (en) * 1978-09-18 1980-04-23 Hopfe H A device for extracting hydrodynamic energy from waves
FR2541730A1 (en) * 1982-01-13 1984-08-31 Faure Michel Module for converting marine energy into electrical energy
US4754157A (en) * 1985-10-01 1988-06-28 Windle Tom J Float type wave energy extraction apparatus and method
FR2808844A1 (en) * 2000-05-10 2001-11-16 Michel Albert Pioche Conversion of wave energy from the sea to electrical energy, uses multiple float operated pumps resting on sea bed to deliver water through collective pipe to generating station on the shore

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2895466A1 (en) * 2005-12-22 2007-06-29 Olaf Rene Zalcman Wave/swell energy exploiting device for e.g. industrial field, has transformation apparatuses actuated by rotating units that are supported by floating structure, and conductor agents placed between floating structure and shore
CN105888951A (en) * 2016-04-06 2016-08-24 福建爱迪生科技有限公司 Marine electricity generating device

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EP1520103A1 (en) 2005-04-06
ITMI20021467A1 (en) 2004-01-05
ITMI20021467A0 (en) 2002-07-04

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