WO2014106765A1 - Turbine a aubes helicoidales - Google Patents
Turbine a aubes helicoidales Download PDFInfo
- Publication number
- WO2014106765A1 WO2014106765A1 PCT/IB2013/000011 IB2013000011W WO2014106765A1 WO 2014106765 A1 WO2014106765 A1 WO 2014106765A1 IB 2013000011 W IB2013000011 W IB 2013000011W WO 2014106765 A1 WO2014106765 A1 WO 2014106765A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- blades
- bulb
- vanes
- helical
- group
- Prior art date
Links
- 230000005611 electricity Effects 0.000 claims abstract description 9
- 239000012530 fluid Substances 0.000 claims abstract description 9
- 230000003247 decreasing effect Effects 0.000 claims description 5
- 238000004519 manufacturing process Methods 0.000 claims description 3
- 230000007423 decrease Effects 0.000 description 23
- 238000011144 upstream manufacturing Methods 0.000 description 23
- 230000001105 regulatory effect Effects 0.000 description 12
- 238000013459 approach Methods 0.000 description 8
- 230000000712 assembly Effects 0.000 description 5
- 238000000429 assembly Methods 0.000 description 5
- 230000008901 benefit Effects 0.000 description 5
- 230000001141 propulsive effect Effects 0.000 description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 239000000463 material Substances 0.000 description 2
- 230000002459 sustained effect Effects 0.000 description 2
- 241000251468 Actinopterygii Species 0.000 description 1
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000001133 acceleration Effects 0.000 description 1
- 238000004873 anchoring Methods 0.000 description 1
- 230000005465 channeling Effects 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 239000008239 natural water Substances 0.000 description 1
- 230000007935 neutral effect Effects 0.000 description 1
- 230000008092 positive effect Effects 0.000 description 1
- 229960001868 propulsives Drugs 0.000 description 1
- 230000002441 reversible effect Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Classifications
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- 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
- F03B13/10—Submerged units incorporating electric generators or motors
-
- 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
- F03B17/00—Other machines or engines
- F03B17/06—Other machines or engines using liquid flow with predominantly kinetic energy conversion, e.g. of swinging-flap type, "run-of-river", "ultra-low head"
- F03B17/061—Other machines or engines using liquid flow with predominantly kinetic energy conversion, e.g. of swinging-flap type, "run-of-river", "ultra-low head" with rotation axis substantially in flow direction
-
- 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
- F03B3/00—Machines or engines of reaction type; Parts or details peculiar thereto
- F03B3/12—Blades; Blade-carrying rotors
- F03B3/121—Blades, their form or construction
-
- 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
- F03D—WIND MOTORS
- F03D1/00—Wind motors with rotation axis substantially parallel to the air flow entering the rotor
- F03D1/02—Wind motors with rotation axis substantially parallel to the air flow entering the rotor having a plurality of rotors
- F03D1/025—Wind motors with rotation axis substantially parallel to the air flow entering the rotor having a plurality of rotors coaxially arranged
-
- 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
- F03D—WIND MOTORS
- F03D3/00—Wind motors with rotation axis substantially perpendicular to the air flow entering the rotor
- F03D3/005—Wind motors with rotation axis substantially perpendicular to the air flow entering the rotor the axis being vertical
-
- 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
- F03D—WIND MOTORS
- F03D3/00—Wind motors with rotation axis substantially perpendicular to the air flow entering the rotor
- F03D3/06—Rotors
- F03D3/062—Rotors characterised by their construction elements
-
- 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
- F03D—WIND MOTORS
- F03D9/00—Adaptations of wind motors for special use; Combinations of wind motors with apparatus driven thereby; Wind motors specially adapted for installation in particular locations
- F03D9/008—Adaptations of wind motors for special use; Combinations of wind motors with apparatus driven thereby; Wind motors specially adapted for installation in particular locations the wind motor being combined with water energy converters, e.g. a water turbine
-
- 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
- F03D—WIND MOTORS
- F03D9/00—Adaptations of wind motors for special use; Combinations of wind motors with apparatus driven thereby; Wind motors specially adapted for installation in particular locations
- F03D9/20—Wind motors characterised by the driven apparatus
- F03D9/25—Wind motors characterised by the driven apparatus the apparatus being an electrical generator
-
- 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
- F03D—WIND MOTORS
- F03D9/00—Adaptations of wind motors for special use; Combinations of wind motors with apparatus driven thereby; Wind motors specially adapted for installation in particular locations
- F03D9/20—Wind motors characterised by the driven apparatus
- F03D9/28—Wind motors characterised by the driven apparatus the apparatus being a pump or a compressor
-
- 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
- F05B2210/16—Air or water being indistinctly used as working fluid, i.e. the machine can work equally with air or water without any modification
-
- 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
- F05B2250/00—Geometry
- F05B2250/20—Geometry three-dimensional
- F05B2250/25—Geometry three-dimensional helical
-
- 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
- Y02E10/20—Hydro energy
-
- 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
-
- 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
- Y02E10/70—Wind energy
- Y02E10/72—Wind turbines with rotation axis in wind direction
-
- 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
- Y02E10/70—Wind energy
- Y02E10/74—Wind turbines with rotation axis perpendicular to the wind direction
Definitions
- the present invention relates to a helical blade turbine for the production of electricity.
- Hydraulic energy is one of the so-called “green” forms of energy or
- WO 2007/129049 discloses a turbine comprising a first rotor rotatably mounted about an axis of rotation extending transversely to the direction of the current and having a plurality of preferably helical blades and whose longitudinal axis is also transversal to the direction of the current.
- the turbine also comprises a second rotor rotatably mounted about said axis of rotation and having a plurality of blades preferably helical and whose longitudinal axis is also transverse to the direction of the current.
- the first rotor is arranged to rotate in a first direction under the action of the current and the second rotor is arranged to rotate in a second direction opposite to the first.
- the blades of the second rotor are arranged so that the blades of the first rotor rotate within the space defined by the vanes of the second rotor.
- This turbine must be positioned so that its longitudinal axis is transverse to the current.
- a turbine placed transversally to the current generates a lot of disturbances.
- it is necessary to a turbine placed transversely to the current not only a large current but a rapid discharge of the fluid downstream, that is to say, a sufficient slope of the fluid conduit to recreate the necessary current.
- its blades are efficient especially when they perform their half circle, seen in profile, in the direction of the current. When they make their second half circle, while going up the current, they are less powerful whatever the shape of their profile because they work in a flow disturbed by the dawn located upstream and which precedes them with respect to the direction of rotation.
- This turbine can be maintained at the surface of the flow, half-immersed. In this position, the efficiency of the turbine is reduced by the disturbances of the flow located near its surface and the blades work only half of their complete rotation.
- the transverse position of such a turbine also implies a large infrastructure of concrete channeling the entire flow between the attachment points of the helical blades at their ends. Spaces left between the rotary bases of the blades (rotors) and the sides of the channel would reduce the productivity of the turbine.
- the turbine described by WO 2007/129049 can not be positioned parallel to the current because the bases of the helical blades (rotors) are flat. Their entire surface would be in a position transverse to the current. Even truncated more and more outwardly, between the attachment points with the helical blades ( Figure 2 and 3 of WO 2007/129049), the bases would cause large disturbances of the flow downstream of their positions and reduce the turbine productivity at little thing.
- the object of the present invention is to provide a turbine for producing electricity in a non-polluting manner, which is effective in low, medium or high currents and which requires only a small infrastructure that induces only one impact. minimal on the environment, especially on fauna and flora as well as on human activities.
- the present invention relates to a turbine according to claim 1.
- Figures 1 and 2 are side views of a turbine according to the invention immersed at sea.
- Figure 3 is a front view of a turbine according to the invention located in a river or a river.
- FIG. 4 is a partial view in section along its longitudinal axis of a turbine according to the invention in its version for low or medium current
- Figure 5 is a side view of a portion of the blades of a turbine according to the invention in its version for low or medium current.
- FIG. 6 is a front view of the blades illustrated in FIG.
- Figure 7 is a view similar to Figure 5 illustrating the directions of rotation of the first and second groups of blades integral with a turbine according to the invention in its version for low or medium current.
- Figure 8 is a side view of the bulb of the turbine according to the invention in its version for low or medium current.
- FIGS. 9 and 10 illustrate a variant in which medium fins are fixed respectively to the external holding vanes and to the internal regulating vanes for starting the first and second turbine blade groups according to the invention.
- FIG. 11 illustrates the profile of all the blades of the turbine according to the invention.
- Figure 12 is a detailed view of the top of a regulator blade and the front end of a helical blade of a turbine according to the invention in its version for low or medium current.
- Figure 13 illustrates the spirals described by the outer and inner helical blades of the turbine according to the invention.
- Figure 14 is a side view of the bulb of the turbine according to the invention in its version for strong current.
- Figure 15 is a front view of the turbine according to the invention in its version for strong current.
- Figure 16 is a detailed view, in plan or side, of the front of the helical blades of a turbine according to the invention in its version for high current, representing the relative incidences of the helical blades.
- the turbine according to the invention has a blade configuration (helical and holding vane groups or groups of regulating, helical and holding blades developed around the bulb) which also allows it to be propulsive, by means of inversion. intrados and extrados and the curvature of the profiles of the regulator blades, and those of the helical blades up to approximately 2/3 to 3/4 of their length taken from their maximum spacing relative to in the bulb, and the inversion of transverse and longitudinal incidences of said helical vanes on this fraction.
- the contraction, then the longitudinal expansion of the helicoidal blades are also reversed: these vanes expand longitudinally more and more, then months and less about 2/3 to 3/4 of their length taken from their maximum spacing relative to the bulb.
- the holding vanes according to the invention are similar in this embodiment.
- the internal helical blades according to the invention are fixed in this embodiment at the top of additional holding blades, at least one group, developed substantially perpendicularly to the bulb and located on the back half of the bulb length. These so-called additional blades have no relative impact: their role is furthermore to separate the propulsive and propelled parts of the turbine from the reactor.
- the turbine operating at sea and in rivers whose flow is in principle not less than a known minimum has a better productivity, instantaneous and year-round, than a wind turbine.
- the sea currents due to the tides are known, vary little in intensity and direction.
- a fraction of the electricity produced by the turbine can be used to power a pump that propels water into a reservoir located at altitude.
- a turbine produces electricity thanks to the water coming from this tank.
- the turbine 1 according to the invention generally has a bulb 2 on which is fixed a series of vanes for rotating under the force of the current.
- the tube or the holding cable 100 is attached to a profiled mast 102 anchored in the bottom.
- the holding cable 100 extends inside the profiled mast 102 or the profiled tube 103, to reach, via pulleys 105, the nearest shore.
- a capstan 106 allows unwinding or winding the holding cable 100, controlling the rise of the turbine 1 to the surface and put it back into operational position.
- the action of two divers is sufficient to a depth of approximately forty meters.
- a buoy may be attached to a ring 6 located at the rear end 2b of the bulb 2, inflated and deflated gradually.
- a rope is looped in the ring 6.
- a rope is looped in the ring 6 and unwound gradually from the surface.
- the cable or retaining tube 100 is fixed to the front end of the hub 3 of the turbine 1. Disturbances due to the tube 103 or to the mast 102 sections are small along their trailing edge, and the flow is not slowed in the front of the turbine for the distance that separates them (length of the tube or holding cable 100).
- the hub 3 is at the longitudinal center of the bulb 2 of the turbine on the longitudinal axis of said bulb 2 ( Figure 4).
- the turbine 1 is positioned so that said means 3 is substantially parallel to the current.
- FIGS. 4 to 13 of a first embodiment of a turbine according to the invention the blades of which are sized for small to medium currents of approximately 0.5 to 2 m / s. If the flow is stable in intensity and direction, the turbine can operate in a current of more than 2m / s.
- the turbine 1 is provided with a first group of integral blades comprising:
- At least two external regulator vanes 40 developed substantially perpendicular to the surface of the bulb 2 and whose bases 40a are located near the front end 2a of the bulb 2; At least two external holding vanes 41 developed substantially perpendicularly to the bulb 2 and located approximately mid-length of the bulb 2 and;
- At least two external helical vanes 42 each forming approximately 3/4 to 5/6 of a turn depending on the dimensions of the turbine and the weight of the materials used, so that the total weight of three integral vanes (regulator, helical and keeping) evenly distributed around the bulb.
- the first group of integral vanes is formed of at least six blades, each outer spiral blade 42 is fixed near its ends.
- a unitary assembly is thus formed by a helical blade, a regulating blade and a holding vane.
- the first group of integral blades thus comprises at least two integral assemblies. However for the sake of clarity, the figures generally illustrate only one of these sets. The blades of the first group are all arranged on the bulb 2 to rotate in the same direction.
- At least two internal regulator blades 50 developed substantially perpendicularly to the surface of the bulb 2 and whose bases 50a are located near the front end 2a of the bulb 2;
- At least two internal holding vanes 51 developed substantially perpendicular to the bulb 2 and located approximately halfway down the bulb 2 and;
- At least two internal helical vanes 52 each forming approximately 3/4 to 5/6 of a turn.
- the second group of integral blades is formed of the same number of blades as the first group and is formed of at least six blades. Therefore, the turbine 1 according to the invention comprises at least twelve blades.
- each internal helical blade 52 is fixed at its ends 52a, 52b respectively to the vertices 50b and 51b of an internal regulator blade 50 and a holding vane internal 51. Said blades thus form a unitary assembly.
- the second group of integral blades thus comprises at least two integral assemblies. However for the sake of clarity, the figures generally illustrate only one of these sets. Finally, the blades of the second group are all arranged on the bulb 2 to rotate in the same second direction, opposite to the first.
- the blades of the second group are situated longitudinally and transversely inside and near the blades of the first group, which justifies the terminology of internal blade for the second group and of the outer blade for the second group. first group.
- the blades of the second group turn inside the space delimited by the blades of the first group.
- the blades of each of the first and second groups are arranged so that the weight of each integral assembly formed of a regulating blade, a holding blade and a helical blade (40, 41, 42 or 50, 51, 52 ) and the total weight of each of the first and second vane groups are distributed homogeneously around the hub 3 of the turbine 1.
- the first and second vane groups have the same weight.
- the first and second groups of blades are arranged to rotate freely (without driving, generator or alternator) at approximately the same speed
- the outer and inner holding vanes 41, 51 are preferably located approximately mid-length of the bulb 2.
- the higher the current the more they are located downstream of this point.
- the higher the current the more the longitudinal incidence (relative to the current) of the helical blades decreases, the longer the spirals are elongated.
- the higher the speed of the current the greater the ratio of the length / spacing with respect to the bulb 2 of the internal and external helical vanes 42, 52 increases, the longer the turbine 1, bulb 2 included, and the lower the incidence of the helicoidal vanes. to avoid the appearance of vortex and cavitation.
- the bulb 2 has a maximum diameter dm and is constant over a fraction x of its length.
- the shape of the bulb 2 of the turbine according to the invention is designed to generate a minimum of disturbances (vortex and drag) in the surrounding fluid. It is known that the elongated bulbous shape 2 reduces the drag effect and can accentuate the current around its periphery. Such advantages are for example described in WO 2010/033147. However, the bulb of this document causes a large and long drag whose maximum diameter downstream of the turbine is less than the maximum diameter of the bulb. This drag downstream significantly reduces the productivity of the turbine and a fortiori that of any turbines fixed chain, one behind the other.
- this drag is reduced because it has been noticed that with a bulb whose negative impacts im are less than 15 degrees in its rear part 2d, the flow is not disturbed and remains laminar ( no or few vortices) with weak to medium currents.
- the external regulator vanes 40, the internal regulator vanes 50, the external retaining vanes 41 and the internal retaining vanes 51 are associated with a respective rotor placed inside the bulb 2.
- the front or nose end 2a of the bulb 2 comprises the rotor of the external regulating vanes 40.
- the rotor of the external holding vanes 41 is contained in a 2nd compartment of the bulb 2.
- the nose 2a of the bulb 2 and said 2nd compartment rotate with the first group of external integral blades (FIG. ).
- the median portion 2c of the bulb 2 which lies between the rotors of the internal regulator blades 50 and internal retaining vanes 51 and which comprises said rotors rotates with the second group of internal vanes.
- the rear compartment 2d of the bulb 2 which extends approximately half of the total length of said bulb 2 at the rear of the rotor of the outer holding vanes 41 does not rotate: said rear compartment 2d of the bulb 2 is fixed to the hub 3 .
- Air is confined in four compartments of the bulb 2, three of which are movable: the nose 2a, the middle part 2c and the second compartment of the rotor of the external holding vanes 41.
- the fixed compartment is the rear compartment 2d of the bulb 2.
- the total air volume, at given depth, gives a neutral buoyancy to the turbine 1 and maintains it in a horizontal position. This volume depends on the weight of the turbine 1, that of the portion of the holding cable 100 and the electrical cable 101 located between the mast 102 or profiled tube 103 and the bulb 2 and the depth at which turbine 1 and cable portion hold 100 free are found.
- the machinery In the bulb 2, at the front or rear of the holding vanes 41, 51, is the machinery generating the electricity (generator, alternator, regulator).
- the blades of the first and second groups of integral blades are arranged so that the blades of the first group (outer blades) rotating in a first direction generate the same force and rotate at approximately the same speed as the blades of the second group (internal blades). turning in a second opposite direction the first when the first and second groups of blades rotate freely (without driving generator or alternator).
- the transverse rotary force generated by a single group of vanes is canceled.
- the rotor and the axis of the external regulator vanes 40 are integral with the hub 3 via preferably at least two ball bearings placed at the front and rear of said rotor.
- the respective rotors and the axis of the internal regulator vanes 50 and internal retaining vanes 51 are integral with the hub 3 via preferably at least eight ball bearings located at the front and rear levels of each of the rotors.
- the rotor and the axis of the outer holding vanes 41 are integral with the hub 3 via preferably at least two ball bearings located at the front and rear of said rotor.
- the leading edge 40c of the external regulator blades 40 is at the level of the front end 2a of the bulb 2 (FIGS. 5 and 8).
- the regulator vanes 40, 50 and the holding vanes 41, 51 have a shape approaching that of a propeller blade. From their base 40a, 50a, 41a, 51a at their top 40b, 50b, 4b, 51, their incidence increases and the curvature of their profile decreases. At their top 40b, 50b, 41b, 51b, their transverse incidence is equal to that, longitudinal, of the spiral of a helical blade 42, 52 at these points.
- the relative (transversal) incidence of the regulator vanes 40, 50 increases from approximately 15 ° to 5 °.
- the holding vanes 41, 51 have a relative incidence which decreases from their base to their top and which is in principle less than that of the regulator vanes 40, 50.
- the helical vanes 42, 52 Near and downstream of the top 50b of the internal regulator vanes 50 and in the vicinity and upstream of summit 51b of internal retaining vanes 51, the helical vanes 42, 52 have a relative longitudinal incidence of 5 °. At the level of the regulator vanes and the holding vanes, the longitudinal incidence of the helicoidal vanes is zero.
- the average relative incidences of all the blades are approximately equal to 10 °. Their maximum relative incidence is in principle less than or equal to 15 °.
- the values given for 5, 10 and 15 ° for the relative incidences of the blades are conventional and variable: they depend on the speed of the current surrounding the blades.
- the optimal incidences are those which are maximum without generating vortices, those with which the flows surrounding the blades (and the rear compartment 2d of the bulb 2) remain laminar.
- the turbine 1 has a maximum rotational speed determined by the appearance of cavitation on the posterior part of the upper surface of the blades or, at higher speed, when the cavitation becomes too great.
- the profile of the blades is as fine as the materials used.
- a shaft is located inside the vanes, placed on the axis of distribution of the pressures and depressions, ensuring the structural rigidity of the blade (for example, shaft 40d in the outer regulator vanes 40 and shaft 41 d in the vanes external retainers 41 shown in Fig. 4).
- the upper surface of all blades is regularly convex along the entire length of their profile.
- the concave portion of the lower surface i decreases: from at the front, it passes approximately 3/4 of the length of the chord of the profile to the half of it (figure 11 for the external regulating vanes 40 with 40th designating the upper surface and 40i designating the lower surface). The remaining back portion is convex.
- the length of the c-strings of all the blades is constant.
- the regulator vanes 40, 50 and retaining vanes 41, 51 and their shaft are split (FIGS. 8, 9, 10 and 12).
- the diameter of the trees and the section of the split profiles are reduced and constant.
- the string of split profiles is reduced. If the resistance of the sets of integral vanes requires it, the chord of the split profiles increases more and more close to their vertex, with the exception of the double before 150 of the internal regulating vanes 50 and the double before 141 of the retaining vanes 41.
- the double before 140 of the external regulator vanes 40 are curved on the front
- the rear double 250 of the internal regulator vanes 50 are curved on the back .
- the top of the front double 140 of the outer regulator blades 40 is attached to the outer helical vanes 42 at a small distance from the leading end 42a thereof.
- the top of the back twins 250 of the inner regulator vanes 50 are attached to the inner helical vanes 52 at the end 52a thereof.
- the front double 151 of the inner retaining vanes 51 are curved on the front and the rear double 241 of the outer retaining vanes 41 are curved on the rear.
- the top of the rear doubles 251 of the internal holding vanes 51 is attached to the rear end 52b of the inner helical blades 52.
- the top of the rear double members 241 of the outer holding vanes 41 is attached at a small distance from the rear end. 42b external helical blades 42.
- the internal blades of the second group of blades have a slightly longer profile with a curvature slightly lower than that of the outer blades of the first group.
- the leading edge of all vanes, on the intrados side, has a relative incidence of approximately zero when the turbine 1 reaches its optimum rotational speed.
- the spirals described by the helical vanes 42, 52 contract longitudinally downstream of the regulator vanes 40, 50 approximately 2/3 to 3/4 of their length. From about 5 ° to the front, downstream and near the top of the internal regulator blades their relative longitudinal incidence increases to reach a maximum in principle less than or equal to 15 °. From 2/3 to 3/4 of their length, the helical blades 42, 52 expand longitudinally to reach a longitudinal relative incidence at the leading edge of the holding vanes 41, 51 equal to the relative transverse incidence said blades at their apex. The spirals of the outer spiral blades 42 in principle continue to expand downstream from the trailing edge level of the outer holding vanes to their trailing end 42b.
- the average relative longitudinal incidence of the spirals is approximately equal to 10 °.
- Front views (FIG. 6) and plan or profile views (FIG. 13) the spirals of the helicoidal vanes 42, 52, downstream from the top of the internal regulator vanes 50, are centripetal up to approximately 2/3 to 3 / 4 back of their length. From this point, the spirals of the helicoidal vanes 42, 52 are centrifugal, to be regular in the vicinity and upstream of the level of the internal retaining vanes 51.
- the front end 42a of the outer helical blades 42 is slightly upstream of the front end 2a of the bulb 2 ( Figures 5 and 8). From their end 42a at the trailing edge of the internal regulator vanes 50, the outer helical vanes 42 have no incidence, transverse or longitudinal ( Figure 12). Their role is to separate the inner flow around and near the end of the outer regulator vanes 40 and the outer flow and to increase the efficiency of these outer regulator vanes 40 near their top 40b.
- the vertices of the internal regulator blades 50 and external 40 split or not are fixed to the internal helical blades 52, respectively external 42.
- the underside of the regulator vanes 40, 50 split or not is transversely slightly downstream of the edge d
- the trailing edge of the helicoidal vanes 42, 52 is more distant, downstream, transversely, from the extrados of the regulator vanes 40, 50, which may or may not be split off.
- the outer helical vanes 42 have a symmetrical profile. Near their rear end 42b, the outer helical blades 42 have a profile whose length and thickness decreases technically. Their shape approaches that of a half disc.
- the front end 52a of the inner helical blades 52 has approximately the same shape as the front end 42a of the outer helical blades 42: their trailing edge describes a decreasing curve approaching the shape of a quarter circle.
- the rear end 52b of the inner helical blades 52 has a shape symmetrically opposite to that of the front end 42a of the outer helical blades 42: the trailing edge of said internal helical blades 52 therein describes an increasing curve close to the shape of a quarter circle.
- the vertices of the split internal holding vanes 51 are fixed to the internal helical vanes 52. In these places, the leading edges of the internal helical vanes 52 are transversely slightly upstream of the intrados of the duplicates of the internal 51 regulating vanes and their trailing edge more certainly downstream of the extrados of these.
- the extrados of the internal helical blades 52 are internal throughout their entire length, up to their rear end 52b located at the trailing edge of the rear double members 251 of the internal retaining vanes 51.
- the inner and outer helical vanes 52 and 42 have a transverse bearing and a curvature of the opposite direction profile which grow rapidly to reach a relative transverse incidence close to 5 °, then this growth is less and less sustained until approximately 2/3 to 3/4 back of their length, where their relative incidence reaches a maximum in principle less than or equal to 15 °.
- Their relative transverse incidence decreases from this point to zero near and upstream of the level of the double before 151 of the internal holding vanes 51.
- the average relative transverse incidence of the inner and outer helical blades approaches 10 °.
- the leading edge of the internal helical blades 52 approaches the hub 3 from the proximity of the trailing edge of the rear double 250 of the internal regulator blades 50 to approximately 2/3 to 3/4 back of their length (the incidence of the blades is increasing, opposite to that of the outer blades), then moves away from the hub 3 from this point, this up to near, upstream of the leading edge of the double before 151 blades internal retention 51 (the incidence decreases), where it is found with the trailing edge, on the same initial circle (zero incidence).
- the turbine described above with reference to Figures 4 to 13 has blades and a bulb sized for low to medium currents.
- FIGS. 14 and 15 A second embodiment of a turbine according to the invention and dimensioned for high currents (approximately from 2m / s) will now be described in detail with reference to FIGS. 14 and 15 in particular. Since the blades designed for low and medium currents and those for high currents are similar in many characteristics, the description below does not describe in detail these characteristics. In particular, in this second embodiment, the same references designate the same parts or elements of the turbine.
- the impeller 1 dimensioned for strong currents is provided with a first group of integral vanes comprising at least two external helical vanes 42 each forming approximately 3/4 to 5/6 of a turn and at least two external holding vanes 41 located approximately 2/3 of the length of the bulb 2 and developed substantially perpendicularly to the bulb 2.
- the first group of integral vanes is formed of at least four vanes.
- Each external helical blade 42 is fixed at its front end 42a near the front end 2a of the bulb 2 and not far from its rear end 42b at the top 41b of an external holding vane 41.
- a unitary assembly is thus formed by a helical blade and a holding blade.
- the first group of integral blades thus comprises at least two integral assemblies. However, for clarity, Figure 14 illustrates only one of these sets. The blades of the first group are all arranged on the bulb 2 to rotate in the same direction.
- the impeller 1 sized for strong currents is provided with a second group of integral blades comprising at least two internal helical blades 52 each forming approximately 3/4 to 5/6 of a turn and at least two internal holding vanes 51 located approximately 2/3 of the length of the bulb 2 and developed substantially perpendicularly to the bulb 2.
- the second group of integral vanes is formed of at least four vanes and therefore the turbine according to the invention for high current is composed of at least eight blades.
- Each internal helical blade 52 is fixed at its front end 52a near the front end 2a of the bulb 2 and at its rear end 52b at the top 51b of an internal retaining blade 51.
- a unitary assembly is thus formed by a blade helical and a holding blade.
- the second group of integral blades thus comprises at least two integral assemblies. The blades of the second group are all arranged on the bulb 2 to rotate in the same second direction opposite to the first.
- the front part or nose 2a of the bulb comprising the rotor of the outer helical blades 42 and the 2nd compartment of the bulb 2 comprising the rotor of the outer holding vanes 41 rotate with the outer blades forming the first group of blades.
- the median portion 2c of the bulb situated between the rotor of the internal helical blades 52 and that of the internal retaining blades 51 and comprising said rotors rotates with the internal vanes forming the second group of integral blades.
- the rear compartment 2d of the bulb 2 (approximately 1/3 of its length in this embodiment), at the rear of the rotor of the external holding vanes 41, does not rotate: said rear compartment 2d is fixed to the hub 3 of the bulb 2.
- the shape of the bulb 2 is the shape of the bulb 2.
- the positive effects around the nose 2a of the bulb 2 are smaller than those of nose 2a of bulb 2 shaped for low and medium currents.
- the bulb 2 of a turbine according to said second embodiment for a high current has a maximum diameter dm and constant over a fraction x of its length. The higher the speed of the current, the longer this fraction becomes.
- Downstream of this fraction x negative incidences appear and increase on the surface of the bulb 2 to reach an approximate maximum i'm of 5 ° near the rear end 2b of the bulb 2. From this point, the diameter of the bulb 2 decreases technically. This section of the bulb 2 approaches the shape of a half sphere ( Figure 14).
- the leading edge of the helical blades 42, 52 close to their base 42a, 52a, forms approximately an angle of 90 ° with the tangent to the curve forming the nose 2a of the bulb 2 ( Figure 14). From their base 42a, 52a to a point approximately near their maximum spacing, the helical vanes 42, 52 are curved forward. The most upstream point of the flare is approximately 3/4 outside the maximum spacing of the helicoidal blades from the bulb (it depends on the size of the blades). Regarding the external helical blades 52, it is at the height of the front end 2a of the bulb 2.
- the helicoidal vanes 42, 52 describe a curve opposite to their direction of rotation. Appearing close to their base, this curve increases more and more, increases about 3/4 outside the maximum spacing of the blades (depending on the size of the blades) to then decrease and form a circle at maximum spacing helical blades 42, 52.
- the incidence of the helical vanes 42, 52 increases, their relative incidence and curvature decrease from their base 42a, 52a to the point where they reach their maximum spacing.
- the helicoidal vanes 42, 52 pass from a development on a plane substantially perpendicular to the current to a development on a plane essentially parallel to the current. Between these two points, their transverse and longitudinal incidences intertwine. We can add them once modulated by coefficients that evolve throughout this segment.
- the helicoidal vanes 42, 52 are oriented on the same plane as the current, they have initiated their spiral and their leading and trailing edges have been reversed.
- the outer helical vanes 42 have a zero transverse incidence. Their relative longitudinal incidence is approximately equal to 5 °.
- first and second blade groups (internal and external) rotate at approximately the same speed when they do not drive the generator or alternator.
- the spirals described by the helicoidal vanes 42, 52 contract longitudinally from their maximum spacing, approximately up to 2/3 to 3/4 of the length of their spiral taken from their spacing 2. From this point, the spirals expand to reach at the leading edges of the tips of the holding vanes 41, 51, a longitudinal relative incidence equal to the transverse relative incidence of said vanes. keeping in these places.
- the spirals of the outer helical blades 42 continue in principle to expand downstream from the top 41b of the outer holding vanes 41 to their end 42b and have a propulsive action.
- the outer helical vanes 42 from their maximum spacing to near and upstream of the leading edge level of the inner retaining vanes 51, have an outer extrados. Around this point, their extrados passes from the outside to the inside until and after the level of the trailing edge of the outer holding vanes 41. Downstream from this level to their rear end, the outer helical blades 42 have a symmetrical profile whose length decreases simply near their rear end 42b, which has a shape approaching that of a half disk.
- the extrados of the internal helical blades 52 is on the inside over their entire length.
- the outer helical blades 52 At the front, downstream of their maximum spacing, the outer helical blades 52 have a curvature of profile and a transverse incidence which grow rapidly to reach a relative incidence of 5 °, then this growth is less and less sustained up to approximately 2/3 to 3/4 of the length of their spiral (taken from the maximum gap of the blades), where their relative incidence reaches approximately 15 ° maximum. Their impact transverse and the curvature of their profile decreases from this point to disappear near and upstream of the level of the internal retaining vanes 51.
- the internal helical blades 52 At their maximum spacing, the internal helical blades 52 have a relative transverse incidence of 5 °. Downstream of this point, their relative transverse incidence and the curvature of their profile are increasing, less and less, to reach 15 ° maximum at a point situated approximately between 2/3 and 3/4 of the length of their spiral taken at from the maximum spacing of the blades. Their incidence and the curvature of their profile decreases from this point to disappear near and upstream of the leading edge of the internal holding vanes 51.
- the leading edge of the inner helical blades 52 approaches the hub 3 from their maximum spacing to a point approximately between 2/3 and 3/4 of the length of the blade spirals (increasing incidence) , then away from it (decreasing incidence), this up to and upstream of the level of the internal holding vanes 51, where it is left with the trailing edge on the same initial circle (zero incidence).
- the turbine designed for high current thus comprises a bulb on which are fixed a first and a second group of blades.
- the first and second groups each comprise at least two helical blades extending substantially and approximately perpendicular to the bulb and over the remainder of their length substantially and approximately parallel to the bulb, and as many holding vanes extending substantially perpendicular to the bulb, located between half and 2/3 of the length of said bulb, the helicoidal blades being fixed at a first end to the front end of the bulb while their second end is attached to a holding vane.
- the first group and the second group of blades are arranged to rotate in opposite directions, the second turning in the space delimited by the blades of the first group.
- the transverse and longitudinal incidences of the helical blades once modulated by coefficients that evolve over the entire length of these blades, can be added to obtain the total force obtained.
- This force is greater than that obtained with blades in similar situation opposing an incidence twice as large, only transverse to the current, since the flows around the helical blades are laminar.
- the invention is the addition of the increase of the diameter of the bulb (slight increase in the speed of the flow at the height of the helical blades) and the concentricity of the helical blades to the rear which is efficient.
- the space between the bulb and the helical blades decreases more and more, going backwards, then less and less (from 2/3 to 3/4 of the length of the helicoidal blades taken from their maximum spacing), to be constant upstream and close to the holding vanes. It is similar to that of a reactor nozzle.
- the concentricity of the internal helical blades allows them to operate in a flow that is only slightly disturbed by the regulator blades.
- the role of the concentricity of the helicoidal vanes is also to concentrate the vortices appearing along their trailing edge, thus reducing the diameter of the disturbed flow and the volume of fluid idle downstream of the turbine.
- the rotational speed of the turbine according to the invention is proportional to the speed of the current but it is never very high.
- the vanes are preferably of steel and most of the weight of the vane assemblies is not far from the maximum spacing thereof from the hub.
- the helical blades of the turbine develop on half to 2/3 of the length of the bulb and the maximum diameter of the bulb is between its mid-length and 2/3 back the length thereof.
- the turbine according to the invention also has the advantage of being placed in series on the same site. Indeed, the turbine according to the invention being shaped to limit the disturbances caused by its operation, it does not interfere with a similar turbine that would be placed nearby.
- the helicoidal blades may be attached to the bulb via regulator vanes extending substantially perpendicular to the bulb surface at the front end of said bulb.
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Power Engineering (AREA)
- Hydraulic Turbines (AREA)
- Other Liquid Machine Or Engine Such As Wave Power Use (AREA)
Abstract
Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PCT/IB2013/000011 WO2014106765A1 (fr) | 2013-01-04 | 2013-01-04 | Turbine a aubes helicoidales |
US14/758,843 US20150337794A1 (en) | 2013-01-04 | 2013-01-04 | Turbine with helical blades |
JP2015551226A JP2016502034A (ja) | 2013-01-04 | 2013-01-04 | 螺旋状のタービンブレード |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
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PCT/IB2013/000011 WO2014106765A1 (fr) | 2013-01-04 | 2013-01-04 | Turbine a aubes helicoidales |
Publications (1)
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WO2014106765A1 true WO2014106765A1 (fr) | 2014-07-10 |
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ID=47741202
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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PCT/IB2013/000011 WO2014106765A1 (fr) | 2013-01-04 | 2013-01-04 | Turbine a aubes helicoidales |
Country Status (3)
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US (1) | US20150337794A1 (fr) |
JP (1) | JP2016502034A (fr) |
WO (1) | WO2014106765A1 (fr) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20190003453A1 (en) * | 2017-06-30 | 2019-01-03 | National Research Council Of Canada | Offset perpendicular axis turbine |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US9739255B2 (en) * | 2015-11-06 | 2017-08-22 | Barry G. Heald | Submersible turbine generator |
RU2616334C1 (ru) * | 2016-05-04 | 2017-04-14 | Виктор Михайлович Лятхер | Ортогональная турбина (варианты) |
EP3508717A4 (fr) * | 2016-08-09 | 2020-04-15 | Manuel Muñoz Saiz | Système de capture d'énergie de courants fluidiques |
JP6979205B2 (ja) * | 2018-02-08 | 2021-12-08 | 国立研究開発法人宇宙航空研究開発機構 | プロペラ、プロペラの設計方法、プロペラ設計方法プログラム及び情報記憶媒体 |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
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US1100332A (en) * | 1912-09-03 | 1914-06-16 | James B Smith | Windmill. |
FR2811720A1 (fr) * | 2000-07-13 | 2002-01-18 | Jacques Coste | Turbine aerienne (air) ou immergee (eau) en deux rotors a rotation inversee |
WO2007129049A1 (fr) | 2006-05-02 | 2007-11-15 | David Mcsherry | turbine permettant d'extraire de l'Énergie À partir d'un fluide en circulation |
WO2010033147A2 (fr) | 2008-08-22 | 2010-03-25 | Natural Power Concepts, Inc. | Appareil de génération d’électricité à partir d’un fluide en circulation à l’aide d’une turbine généralement allongée |
US20110027084A1 (en) * | 2009-07-31 | 2011-02-03 | Andrew Rekret | Novel turbine and blades |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4293274A (en) * | 1979-09-24 | 1981-10-06 | Gilman Frederick C | Vertical axis wind turbine for generating usable energy |
US6948910B2 (en) * | 2002-07-12 | 2005-09-27 | Polacsek Ronald R | Spiral-based axial flow devices |
WO2004011798A2 (fr) * | 2002-07-31 | 2004-02-05 | The Board Of Trustees Of The University Of Illinois | Dispositif de turbine a vent |
KR100774308B1 (ko) * | 2006-11-28 | 2007-11-08 | 한국해양연구원 | 헬리컬 터빈 발전시스템 |
US7849596B2 (en) * | 2007-11-19 | 2010-12-14 | Ocean Renewable Power Company, Llc | High efficiency turbine and method of making the same |
-
2013
- 2013-01-04 JP JP2015551226A patent/JP2016502034A/ja active Pending
- 2013-01-04 WO PCT/IB2013/000011 patent/WO2014106765A1/fr active Application Filing
- 2013-01-04 US US14/758,843 patent/US20150337794A1/en not_active Abandoned
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1100332A (en) * | 1912-09-03 | 1914-06-16 | James B Smith | Windmill. |
FR2811720A1 (fr) * | 2000-07-13 | 2002-01-18 | Jacques Coste | Turbine aerienne (air) ou immergee (eau) en deux rotors a rotation inversee |
WO2007129049A1 (fr) | 2006-05-02 | 2007-11-15 | David Mcsherry | turbine permettant d'extraire de l'Énergie À partir d'un fluide en circulation |
WO2010033147A2 (fr) | 2008-08-22 | 2010-03-25 | Natural Power Concepts, Inc. | Appareil de génération d’électricité à partir d’un fluide en circulation à l’aide d’une turbine généralement allongée |
US20110027084A1 (en) * | 2009-07-31 | 2011-02-03 | Andrew Rekret | Novel turbine and blades |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20190003453A1 (en) * | 2017-06-30 | 2019-01-03 | National Research Council Of Canada | Offset perpendicular axis turbine |
US10844835B2 (en) * | 2017-06-30 | 2020-11-24 | National Research Council Of Canada | Offset perpendicular axis turbine |
Also Published As
Publication number | Publication date |
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JP2016502034A (ja) | 2016-01-21 |
US20150337794A1 (en) | 2015-11-26 |
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