WO2024110893A1 - Hydro-turbine et son déploiement - Google Patents

Hydro-turbine et son déploiement Download PDF

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Publication number
WO2024110893A1
WO2024110893A1 PCT/IB2023/061793 IB2023061793W WO2024110893A1 WO 2024110893 A1 WO2024110893 A1 WO 2024110893A1 IB 2023061793 W IB2023061793 W IB 2023061793W WO 2024110893 A1 WO2024110893 A1 WO 2024110893A1
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WO
WIPO (PCT)
Prior art keywords
turbine
axis
blades
blade
water
Prior art date
Application number
PCT/IB2023/061793
Other languages
English (en)
Inventor
Francis William MOLONEY
Ross David CAVILL
Original Assignee
Repetitive Energy Company Ltd
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 Repetitive Energy Company Ltd filed Critical Repetitive Energy Company Ltd
Publication of WO2024110893A1 publication Critical patent/WO2024110893A1/fr

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
    • F03B—MACHINES OR ENGINES FOR LIQUIDS
    • 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"
    • F03B17/062—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 at right angle to 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
    • 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
    • F03B13/26—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 tide energy
    • F03B13/264—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 tide energy using the horizontal flow of water resulting from tide movement
    • 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
    • F05B2240/00—Components
    • F05B2240/20—Rotors
    • F05B2240/24—Rotors for turbines
    • F05B2240/244—Rotors for turbines of the cross-flow, e.g. Banki, Ossberger type
    • 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
    • F05B2250/00—Geometry
    • F05B2250/10—Geometry two-dimensional
    • F05B2250/15—Geometry two-dimensional spiral
    • 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
    • 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
    • F05B2250/30—Arrangement of components
    • F05B2250/31—Arrangement of components according to the direction of their main axis or their axis of rotation
    • F05B2250/315—Arrangement of components according to the direction of their main axis or their axis of rotation the main axis being substantially vertical
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00—Energy generation through renewable energy sources
    • Y02E10/30—Energy from the sea, e.g. using wave energy or salinity gradient

Definitions

  • the present invention relates to turbines for harnessing the kinetic energy in water flows, particularly but not exclusively, vertical axis hydro-turbines i.e. where the axis of rotation of the turbine is nominally perpendicular/transverse to the water flow, also known as cross-axis turbines, and to the deployment of such turbines.
  • Reaction turbines such as a Pelton wheels, which employ a jet or jets of water have been used to improve efficiency.
  • Impulse wheels such as Francis and Kaplan wheels have also been produced, with further improved efficiency.
  • These impulse wheels generally have an enclosed bladed turbine set of various geometries.
  • these designs rely on complex sets of turbine blades and complementary curved/scrolled housings, which are expensive to manufacture, and not easy to repair because they are enclosed. Where it is impracticable to capture water flows in pipes and the like, for example in tidal sea flows or deep rivers or canals, such reaction and impulse type designs are impracticable.
  • Francis rotors and Kaplan rotors are examples of turbine rotors that rotate about an axis that is aligned with the overall direction of the fluid flowing through them.
  • Savonius rotors and Darrieus rotors are examples of turbine rotors that rotate about an axis that is transverse with the overall direction of the fluid flowing through them, but which do not necessarily require enclosure.
  • Embodiments of this invention relate to these latter turbine types, which are also called vertical axis turbines or cross axis turbines.
  • the invention provides a water flow turbine arrangement for capturing energy from the water flow according to the claims herein having preferred features defined by dependent claims.
  • the invention provides a cross axis hydro-turbine for capturing energy from a water flow having a flow direction, the turbine including plural substantially equi-spaced turbine blades having substantially constant radius about an axis of rotation which axis is generally perpendicular to the intended flow direction, the blades having a helical form with a 10 to 20 degree helix angle measured between a line parallel to said axis and a leading or trailing edge of the blades, and a blade sectional profile corresponding substantially to the NACA 0018 profile as measured when the blade is sectioned along a plane perpendicular to said axis.
  • the turbine further includes a central drive shaft and blade spokes interconnecting the blades and shaft, each blade having at least two spokes and the shaft being rotatably supported by a pair of bearings, one at or adjacent the top and one at or adjacent the bottom of the turbine.
  • the number of blades is two or is three.
  • Figure 1 shows schematically a pictorial view of one embodiment of a vertical axis turbine
  • Figure 2 shows a detail of the turbine shown in Figure 1;
  • Figure 3 shows a pictorial view of a second embodiment of a vertical axis turbine
  • Figure 4 shows a side view of the turbine shown in Figure 3;
  • Figure 5 shows a plan view of the turbine shown in Figure 3;.
  • Figure 6 shows an exploded view of the turbine shown in Figure 3;
  • FIG 7 shows details of the turbine shown in Figure 3;
  • Figure 8 shows a pictorial view of a vertical axis turbine according to a third embodiment
  • Figure 9 shows an arrangement employing the turbine of Figure 8 in a water channel
  • Figure 10 shows a plan view of the arrangement shown in Figure 9;
  • Figure 11 shows a side view of the arrangement shown in Figure 9;
  • Figure 12 shows an end view of the arrangement shown in Figure 9;
  • Figure 13 shows a detailed pictorial view of elements of the arrangement shown in Figure 9.
  • Figure 14 shows a cross section through a blade.
  • a cross axis turbine 100 which includes a fixed superstructure 110, a set of blades 125 mounted on a drive shaft 122 and a rotary machine 130, in this case in the form of an electrical generator, coupled to the drive shaft 122, and fixed to a base 112 of the superstructure 110.
  • This turbine allows generation of electric power from water flows in any approach direction, for example tidal flow and ebb in the directions A and B respectively.
  • the base 112 of the superstructure 110 is manufactured from cast concrete and steel which is preferably heavy enough to hold down the whole turbine 100 to the bed of the water volume in strong water currents.
  • the base 112 is provided with anchor points 114 also, should the water currents at the deployment area merit securing of the turbine to the bed.
  • the superstructure further includes four support legs 116 which are rigidly secured to, and are upstanding from, the base 112. At their upper ends, the legs are further rigidified by, a demountable cross brace 118, having a central top bearing 111 within which an upper end 121 of the turbine's drive shaft 122 rotates in use.
  • the blade set 125 comprises four equally spaced blades 120 connected adjacent their upper and lower regions to the drive shaft 122 by respective spokes 128.
  • the blades 120 are straight along their length and parallel to each other which allows a simple low cost construction.
  • the blades each have lift type profiles, which pull the blade around into the water flow, in the direction of arrow R, and offer low resistance to rotation when moving with the flow.
  • a coupling 140 for transmitting torque to the generator 130 as the shaft is rotated by the blades 120 in a water flow.
  • This coupling 140 is shown in Figure 2.
  • FIG. 2 shows a cross section through the coupling 140 between the drive shaft 122 and the generator 130.
  • the coupling 140 includes a bell housing 142 which is attached to the lower end of the shaft 123 for rotation therewith.
  • An inner face of the bell housing includes a cylindrical array of powerful permanent drive magnets 144.
  • the lower end 146 of the bell housing 142 fits snugly in an open mouthed receiving socket 131 in an upper face of the generator's housing 132, such 10 that the housing acts as a bearing support to keep the generator 130 and shaft 122 aligned by acting as a rotary bearing.
  • Other bearing arrangements are possible to achieve the same alignment.
  • the generator 130 has a rotor 134, driven by a driven shaft 136 all supported on bearings 138, and all hermetically sealed within the generator housing 132.
  • the top of the driven shaft 136 further includes a cylindrical array of powerful permanent driven magnets 139 which are positioned in a complementary attracted position to the drive magnets 144 inside the bell housing 142, such that rotation of the shaft 122 causes rotation of the driven shaft 134 in a torque transmitting manner, as a result of magnetic attraction between the magnets 144 and 139.
  • the housing 132 includes a thin nonmagnetic stainless steel sleeve 133, fitted between the complementary magnets, over the driven shaft 134, forming part of the housing, such that the hermetic sealing of the housing 132 is maintained. Since the generator is hermetically sealed, then there is no possibility of water ingress into the generator housing.
  • the permanent magnet parts and their mountings which form part of the coupling 140 and available commercially for example from KTR Couplings Ltd under the trade name Minex.
  • This coupling arrangement allows upper parts of the superstructure 110, i.e. the cross brace 118 shown in Figure 1 to be disengaged from lower parts of the superstructure 110, i.e. the legs 116, and to be lifted together with the shaft 122 and blade assembly 125, and to leave the generator 130 in place fixed to the base 112, for maintenance purposes. The generator can then be removed if required. Each can be replaced with easy reassembly.
  • Figure 3 shows a further embodiment of a turbine 200 which is similar in construction to the turbine 100 described above. Parts which are similar in construction in the embodiment shown in Figure 1 and in the embodiment shown in Figure 3 have the same last two digits in their reference numbers and so are not fully described below.
  • the embodiment shown in Figure 3 includes a base 212 and legs 216, which have broadly the same construction and function as the base 112 and legs 116 described above, but the legs are not equidistantly spaced in this embodiment. Rather, the legs are laid out such that they occupy a generally rectangular plan, and so are positioned to avoid perturbing water flow in the A and B directions, which are the most likely flow directions which may be encountered when tidal flows are reversed by 180 degrees.
  • blades 220 of a blade set 225 are helically formed around a shaft 222, to provide less vibration than the straight blades shown in Figure 1 when they rotate. In view of their helical formation, and greater efficiency, only three blades are required in this embodiment. Of note also is the proportions of the rotary machine-generator 230, which is flatter than the generator 130 illustrated in Figure 1 and thereby provides a more compact turbine 200.
  • FIGS 4 and 5 show additional views of the embodiment shown in Figure 3.
  • a torque transmitting coupling 240 is used, which has the same construction and function as the coupling 140 described above and illustrated in Figure 2.
  • Figure 6 shows an exploded view of the turbine 200, and illustrates that the cross brace 218, drive shaft 222 and blade set 225 can be removed for maintenance as one assembly, and can be readily separated from the remaining parts of the turbine, including the generator 230, as described above.
  • the generator 230 in this case sits in a recess 213 in the base 212, for ease of assembly, for example when under water.
  • FIG. 7 shows the blade assembly 225 mounted to the drive shaft 222.
  • the spokes 228 which support the blades 220 are each mounted to one of two spaced bosses 229, in turn mounted to the shaft 222.
  • the spokes have an aerofoil profile to reduce drag.
  • Each end of each blade 220 is terminated by an enlarged tip, in this case, in the form of winglet 224, which is generally flat with an aerofoil profile.
  • winglets 224 improve the efficiency of the helical blades still further by inhibiting water flowing over the blades to spill over their ends.
  • a heavy base member 112/212 is preferred, but may be replaced with a lighter base member where the base can be securely anchored to the bed of the volume of water in which the turbine 100/200 rests.
  • the rotary machine 130/230 disposed below the blade assembly 125/225, increases the effective weight of the base and so increases the stabilising effect of the base.
  • the rotary machine may include a gearbox to increase the rotational speed of the drive. It is preferred that the gearbox be incorporated into the housing 132 of the rotary machine such that the coupling 140/240 is between the shaft 122 and the gearbox.
  • a turbine brake can be incorporated into the rotary machine, for example at the gearbox.
  • a cross brace 118/218 is shown which connects together all the legs illustrated. This arrangement is preferred for rigidity, but the cross brace could have another shape besides an X shape, for example, the cross brace could be an annular ring or rectilinear frame connecting each leg, and may include one or more members extending diametrically across the ring or frame, to support the shaft 122/222.
  • This arrangement means that no central support, for example within the shaft 30, is required. This simplifies construction and maintenance procedures, because assembly and disassembly are much easier. Also, this arrangement makes the turbine more rigid and therefore it can be made lighter. This in turn means that smaller equipment can be used to install and maintain the turbine.
  • the legs 116 can be positioned as shown in Figure 1, in the expected flow (A,B Figure 1) such that they perturb water flow at the point where maximum torque would otherwise have been developed for a blade 120. Whilst some efficiency is lost as a result, the turbinelOO develops less vibration during rotation, which extends turbine life.
  • the turbine 200 having helically formed blades 220, develops lees vibration in use and so the legs 216 have been spaced so that they are outside the expected water flow path (A,B Figure 3).
  • the legs 116 and 216 have been illustrated in an arrangement which is generally equidistant and symmetrical about the rotational axis of the turbine, it is possible that the legs are not all so arranged.
  • one or more legs may be closer to the rotational axis than others.
  • the legs closer to the axis can interrupt water flow to one side of the axis, where unidirectional flow is encountered in order to perturb flow on one side only in the path of the turbine elements, and thereby reducing the drag of a blade turbine element as moves in the direction of the flow, or reducing the drag of a vane turbine element as it moves into the flow.
  • rotary machines in the form of electrical generators 130/230 have been described above and illustrated, other rotary machines could be employed to turn the rotational power from the blade set into other energy or potential energy.
  • a dynamo could be used to generate electricity or a pump could be used to compress ambient water or air from a surface supply.
  • blades are preferred, i.e. turbine elements which generate lift in a similar manner to an aeroplane wing, when fluid flows across them.
  • vanes could be used as turbine elements, which are pushed by water flow in the same way as a conventional paddled undershot water wheel.
  • the embodiments provide a simple, low cost, reliable, easy to maintain turbine which can be deployed in the adverse conditions encountered in near-shore sea beds including sea beds which are exposed or have shallow water at low tides, in deeper sea beds where currents exist, and in inland waterways.
  • plural similar turbines can be bolted together or may have other complementary connecting means, such as hooked parts and hook receiving parts.
  • the blade has a rotational radius R which in practice is rotation about axis C shown in Figure 1 and 3.
  • the blade has an exterior profile approximating to a NACA0018 shape, and also a chord line A which is at 2.5 degrees to a line B which is a straight line tangent to the radius R and intersecting that radius line midway along the chord length of the blade, thereby forming an angle of 92.5 degrees between A and B. That slight deviation between the radius R and the chord line A (which is conventionally 90 degrees) is referred to here as an angle of attack and has been found to be most efficiently 2 or 3 degrees.
  • Figures 8 to 13 illustrate an alternative arrangement for mounting a hydro-turbine 300 of particular merit for deploying in water channels and rivers.
  • the hydro-turbine 300 can be of the general type described above in relation to Figures 1 to 7, but mounted to a different frame.
  • the body of the turbine, 300 has three helically formed lift blades 320 each mounted to a rotatable central shaft 322 via spokes 328 similar to the arrangement described above in regard to Figures 1 to 7.
  • the turbine is rotatably mounted on a pair of bearings 311, one atop, and one below the turbine 300 the bearings 311 being supported on cross braces 318, in turn held in a support frame 316.
  • the support frame 316 also supports, in this case, a generator 330, driven directly by the turbine shaft 322 extending upwardly to the generator 330.
  • Figure 9 shows the components mentioned immediately above deployed in a watercourse W having a water flow in the direction of arrow F.
  • the support frame 316 is pivotable about an, approximately, mid point of the support 316 about a pivot axis P such that the turbine 300 can be pivoted out of the water W, i.e. to the point where the frame 316 lies approximately horizontal at position H.
  • the frame 316 etc is supported on a beam 312 which has stabilising legs 314 resting on the banks of the watercourse W.
  • the force exerted on the turbine 300 and submerged frame 316/318 by the flow of water F will urge those parts in the direction of the flow F and cause those parts to want to pivot about axis P. That force is resisted by a tension member, in this case a cable 340 attached at one end to the upper cross brace 318, via a link 341, and at the other end to a stay 342, in turn attached to a large mass, balanced on each side of the watercourse W.
  • the large mass is a plurality of water tanks 344, filled with water, for example, obtained from the watercourse, and pumped into the tanks 344.
  • an ancillary water tank 345 can be filled with water from the watercourse, for example by pumping water via a filler pipe into the tank 345 by means of an electric or hand pump.
  • the weight of the water in the tank 345 will act as a counterweight allowing said pivoting to take place, once the cable 340 is slackened. Slackening of the cable 340 can be achieved by slackening the stay able 342 from the bank of the watercourse.
  • the force of the flowing water F if it is flowing, will initiate the pivoting of the turbine 300 etc, and the counterweight of the water tank 345 will complete the pivoting allowing the turbine to be lifted clear of the water, and accessed via platform 350 to which the now horizontal frame 316 can be held so it can be worked on.
  • the link 341, or a further link on the cable stay 342 can be made to release or break at a predefined tension force, such that should the turbine fail, or become blocked, for example with a floating tree or the like which causes the blockage or partial blockage of the watercourse and subsequent rise in tension/ in the cable 340, then the link 341, or other link will release under the increased tension brought about by said blockage. Even if the counterweight 345 is not full, the turbine will at least partially pivot to allow a less impeded water flow, until the turbine can be cleared or fixed.
  • FIGS 10 to 13 show the features mentioned above in more detail.
  • Figure 10 is a plan view of the arrangement shown in Figure 9, where the layout of the parts described above can be seen more clearly. And, looking in plan view, it will be apparent that it is possible to reverse the arrangement shown in Figures 9 and 10, i.e. to have the mass 344 on the downstream side of the turbine with the cable 340 running from the repositioned masses 344 to the top of the frame above the pivot axis P thereby preventing pivoting as a result of flow F forces. From this view it is also clear that the turbine 300 is exposed to debris in the water flow, and so, in a refinement, a cage may be fitted, at least across the front of the turbine. Either a half round cage could be used, or for economy, a flat faced cage 341 having a point at a leading edge and two flat faces , could be used.
  • Figure 11 is a side view showing the turbine 300 immersed in the water W.
  • the turbine and it's supporting subframe may be slidably mounted in the support frame 316 so that the turbine 300 can be raised and lowered in the direction of arrows R to find the maximum flow speed of water which is usually just below the water's surface. Further being able to immersing the turbine about 0.5-1.0 metre below the water's surface avoids floating debris.
  • a pulley system could be employed for this purpose.
  • Figure 12 is a view of the above mentioned arrangement view from upstream.
  • the position of the generator 330 is clear to see in this figure, mounted at the top end of the rotor shaft 322. It could be positioned higher with a longer shaft, to reduce the need for as much counterweight 345 when the pivoting mentioned above is required.
  • FIG. 13 is an enlarged view the pivot part of the arrangement.
  • the generator 330 , turbine support frame 316 and bridging beam 312 are described above.
  • a pair of pivot blocks 360 are employed each having a pivot pin 362 (only one of which is visible in this figure).
  • the pivot pins are in alignment with the pivot axis P, and allow the pivoting under the conditions described above.
  • the pivot blocks 360 include a latch 364 in the form of a sprung wheel, which in pivoting operation rides over a striker plate 366 welded to the pivot block 360 when the frame 316 reaches the horizontal position, and preventing return movement of the frame until the latch is released.
  • the two pivot blocks 360 can moveable along the beam 312 in a direction along the pivot axis P. Actuation of that movement, for example by means of an electric or hand operated winch brings the frame 316 and turbine 300 closer to one side of the watercourse W, for example to take advantage of a faster flow of water to one side of the watercourse, or for maintenance purposes, whereby the turbine becomes more accessible from the side of the water and is convenient to maintain once it has been pivoted into a horizontal position H as described above.
  • the frame 316 etc will be pivoted to the horizontal H position before the frame assembly is moved along the beam 312, although that need not be the case where the flow F is not so fast

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

Abstract

L'invention concerne une turbine hydraulique à axe transversal destinée à capturer de l'énergie à partir d'un écoulement d'eau W ayant une direction d'écoulement F. Ladite turbine comprend plusieurs aubes de turbine sensiblement équidistantes présentant un rayon sensiblement constant autour d'un axe de rotation qui est généralement perpendiculaire à l'écoulement prévu W ; les aubes présentent une forme hélicoïdale présentant un angle d'hélice de 10 à 20 degrés mesuré entre une ligne parallèle audit axe et un bord d'attaque ou de fuite des aubes, un profil de section de pale correspondant sensiblement au profil NACA 0018 tel que mesuré lorsque l'aube est sectionnée le long d'un plan perpendiculaire audit axe, et de préférence un angle d'attaque d'environ 2,5 degrés.
PCT/IB2023/061793 2022-11-24 2023-11-22 Hydro-turbine et son déploiement WO2024110893A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB2217570.7 2022-11-24
GBGB2217570.7A GB202217570D0 (en) 2022-11-24 2022-11-24 Hydro-turbine and its deployment

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Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20090129928A1 (en) * 2007-11-19 2009-05-21 Sauer Christopher R High efficiency turbine and method of generating power
US20100140947A1 (en) * 2009-03-30 2010-06-10 Mcentee Jarlath High efficiency turbine and method of generating power
US20100253081A1 (en) * 2009-04-07 2010-10-07 Schlabach Roderic A In-pipe hydro-electric power system and turbine
WO2013030582A2 (fr) 2011-09-02 2013-03-07 Mitchell John Stephen Turbine
GB2495443A (en) 2010-12-30 2013-04-10 Cameron Int Corp Barrage with at least one generator assembly
CA2849054A1 (fr) 2011-10-11 2013-04-18 Linell Renewables Limited Generateur a courant de maree
KR20130096060A (ko) 2012-02-21 2013-08-29 연세대학교 산학협력단 수직 터빈 및 이를 포함하는 발전 시스템
EP2908003A1 (fr) * 2014-02-13 2015-08-19 X-Wind Power Limited Rotor d'éolienne à axe vertical et profil aérodynamique
US10746155B2 (en) 2014-10-27 2020-08-18 Repetitive Energy Company Limited Water turbine support structure

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20090129928A1 (en) * 2007-11-19 2009-05-21 Sauer Christopher R High efficiency turbine and method of generating power
US20100140947A1 (en) * 2009-03-30 2010-06-10 Mcentee Jarlath High efficiency turbine and method of generating power
US20100253081A1 (en) * 2009-04-07 2010-10-07 Schlabach Roderic A In-pipe hydro-electric power system and turbine
GB2495443A (en) 2010-12-30 2013-04-10 Cameron Int Corp Barrage with at least one generator assembly
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