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
  • F03B13/141—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 with a static energy collector
  • F03B13/142—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 with a static energy collector which creates an oscillating water column
• • 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
  • F03B13/1805—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 hinged to the rem
  • F03B13/1825—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 hinged to the rem for 360° rotation
  • F03B13/183—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 hinged to the rem for 360° rotation of a turbine-like wom
• • 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
  • F05B2210/00—Working fluid
  • F05B2210/40—Flow geometry or direction
  • F05B2210/404—Flow geometry or direction bidirectional, i.e. in opposite, alternating directions
• • 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
  • F05B2220/00—Application
  • F05B2220/70—Application in combination with
  • F05B2220/706—Application in combination with an electrical generator
  • F05B2220/7068—Application in combination with an electrical generator equipped with permanent magnets
• • 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
  • F05B2240/20—Rotors
  • F05B2240/30—Characteristics of rotor blades, i.e. of any element transforming dynamic fluid energy to or from rotational energy and being attached to a rotor
• • 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
  • F05B2240/20—Rotors
  • F05B2240/33—Shrouds which are part of or which are rotating with the rotor
• • 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
  • F05B2240/97—Mounting on supporting structures or systems on a submerged 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
  • F05B2260/00—Function
  • F05B2260/70—Adjusting of angle of incidence or attack of rotating blades
  • F05B2260/74—Adjusting of angle of incidence or attack of rotating blades by turning around an axis perpendicular the rotor centre line
• • 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

• This invention concerns a turbine for a so-called oscillating water column power plant. More particularly, it concerns a turbine for an oscillating water column power plant, wherein wave-powered flow energy in the water is converted into an exploitable form of energy, such as electric energy, and wherein the turbine, which is submerged in the water, comprises blades being pivotal relative to the turbine, wherein the blades are structured in a manner allowing them to be pivoted between at least two positions by the water flowing through the turbine.
• So-called oscillating water column power plants comprise, according to prior art, a vertical tubular column, wherein an open lower portion of the column is submerged, whereas an open upper portion of the column is located above the water.
• an air-driven turbine is disposed in the tubular column above the water surface .
• Oscillating water column power plants are encumbered with a relatively low efficiency, which may be due to compression and expansion of air, the relatively low density of the air and the problems of the air turbine in obtaining efficient throughput of air repeatedly alternating its flow direction, among other things .
• the object of the invention is to remedy or reduce at least one of the disadvantages of prior art.
• a turbine in accordance with the invention for a so-called oscillating water column power plant, wherein wave-powered flow energy in the water is converted into an exploitable form of energy, such as electric energy, is characterized in that the turbine, which is submerged in the water, comprises blades being pivotal relative to the turbine and being structured in a manner allowing them to be pivoted between at least two positions by the water flowing through the turbine.
• the term power plant implies a power plant operating in accordance with the principle of an oscillating water column and being provided with a turbine according to the paragraph above .
• the turbine rotates about a vertical main axis
• the pivot axes of the blades relative to the turbine hereinafter denoted relative pivot axes
• substantially may be radial.
• the relative pivot axes may directed in any suitable direction relative to the turbine.
• the blades are hinged at their front portion relative to the direction of rotation of the turbine .
• the turbine blades may be plane or assigned a more favourable shape with respect to flow.
• the turbine may be mounted on a supported shaft or be supported at its outer mantle.
• magnets may be appropriate, especially for smaller power plants, to dispose magnets along the outer mantle of the turbine, wherein the magnets cooperate with electric coils in a stator surrounding the turbine in order to produce electric energy.
• the arrangement resembling a tapered channel is formed with two or several walls forming a wedge in the direction of flow of the waves.
• the tapered channel is open at its rear portion in order to prevent waves from returning back through the tapered channel so as to prevent the next incoming wave from being utilized in the power plant.
• Several power plants according to the invention may be placed along the tapered channel in order to utilize the amplifying effect of the tapered channel onto the wave height.
• the bottom in a tapered channel adapted to the power plant according to the invention may be horizontal or insignificantly sloping, relatively speaking.
• Fig. 1 shows a vertical section II-II in fig. 2 of a turbine according to the invention while the water is flowing upwards through the turbine ;
• Fig. 2 shows a section I-I in fig. 1;
• Fig. 3 shows, in larger scale, a side view of blades seen in the direction of a centre of the turbine while the water is flowing upwards through the turbine;
• Fig. 4 shows the same as in fig. 3, but while the water is flowing downwards through the turbine;
• Fig. 5 shows, in an alternative embodiment, the turbine in fig. 1 being supported at its outer mantle and having mounted thereto permanent magnets cooperating with windings in a stator; and Fig. 6 schematically shows a tapered channel provided with several power plants at the wall portions thereof.
• the reference numeral 1 denotes a turbine assembly operating in accordance with the so-called oscillating water column principle.
• the turbine assembly 1 comprises a submerged turbine 2 connected to a turbine shaft 4 being rotatable about a vertical main axis 6.
• the turbine 2 is placed concentrically in a tubular column 8, wherein a lower portion 10 of the tubular column is located in the water, whereas an upper portion 12 of the tubular column 8 extends above the water surface 14.
• the turbine shaft 4 is suspended in the tubular column 8, whereas the tubular column 8 is mechanically connected to attachments (not shown) , other bearings and a potential generator not being shown in the figures either.
• the turbine 2 comprises a boss 18 and an outer mantle 20. Between the boss 18 and the outer mantle 20, a number of blades 22 are distributed about the boss 18, of which a first blade is denoted 22' and a second blade is denoted 22'' .
• the blades 22 are hingedly suspended about a relative pivot axis 23 at the respective front portion 24 of the blades 22 relative to the direction of rotation of the turbine 2.
• the relative pivot axes 23 coincide with shafts (not shown) connecting the boss 18 to the outer mantle 20.
• the water level within the tubular column 8 is indicated with the reference numeral 26. As long as the water level 26 within the tubular column 8 is lower than the water surface 14 outside the tubular column 8, water continues to flow upwards through the turbine 2.
• the turbine 2 continues to rotate in the same direction B.
• the blades 22 will align into an intermediate position between their respective upwardly- and downwardly- turned positions where the blades 22 produce a relatively small flow resistance in the water. Thereby, the turbine 2 is only insignificantly slowed down during alteration of flow direction through the turbine 2.
• the turbine 2 is supported by means of bearings 28 at its outer mantle 20.
• the turbine 2 is provided with several magnets 30, preferably permanent magnets, surrounding the turbine 2.
• the magnets 30 cooperate with windings in a stator 32 which, when the turbine 2 rotates in a manner per se about its main axis 6, produces electric energy.
• turbine assemblies 1 may prove advantageous to dispose turbine assemblies 1 in association with a tapered channel 34, see fig. 6, in order to further increase the throughput in the turbines 2.
• the tapered channel 34 is shown in an embodiment having a double course and comprising two side walls 36 and an intermediate wall 38 and also a bottom 40.
• the side walls 36 extend with decreasing relative distance in the direction of the waves, but without meeting completely, insofar as the tapered channel 34 is provided with discharge openings 42 for the water.
• the turbine assemblies 1 communicate with the tapered channel 34 via respective submerged openings 44 in the walls 36, 38.

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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)
• Hydraulic Turbines (AREA)

Applications Claiming Priority (1)

Publications (2)

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Citations (6)

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• 2007
  • 2007-11-13 EP EP07851977A patent/EP2225457A4/de not_active Withdrawn
  • 2007-11-13 WO PCT/NO2007/000400 patent/WO2009064190A1/en active Application Filing

Patent Citations (6)

Non-Patent Citations (1)

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