WO2014136032A1 - A stream turbine - Google Patents
A stream turbine Download PDFInfo
- Publication number
- WO2014136032A1 WO2014136032A1 PCT/IB2014/059385 IB2014059385W WO2014136032A1 WO 2014136032 A1 WO2014136032 A1 WO 2014136032A1 IB 2014059385 W IB2014059385 W IB 2014059385W WO 2014136032 A1 WO2014136032 A1 WO 2014136032A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- shroud
- rotor
- turbine
- nozzle ring
- stream
- Prior art date
Links
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"
- F03B17/061—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
- 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
- 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
- F05B2240/10—Stators
- F05B2240/12—Fluid guiding means, e.g. vanes
- F05B2240/122—Vortex generators, turbulators, or the like, for mixing
-
- 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
- F05B2240/10—Stators
- F05B2240/13—Stators to collect or cause flow towards or away from turbines
-
- 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
- F05B2240/10—Stators
- F05B2240/13—Stators to collect or cause flow towards or away from turbines
- F05B2240/133—Stators to collect or cause flow towards or away from turbines with a convergent-divergent guiding structure, e.g. a Venturi conduit
-
- 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
- F05B2250/50—Inlet or outlet
- F05B2250/501—Inlet
- F05B2250/5012—Inlet concentrating only, i.e. with intercepting fluid flow cross sectional area not greater than the rest of the machine behind the inlet
-
- 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
- F05B2250/50—Inlet or outlet
- F05B2250/502—Outlet
-
- 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
Definitions
- This invention relates to a turbine configured to generate electrical power when inserted into a flowing stream of water or air or any other suitable fluid.
- a turbine is a mechanical device that extracts power from a fluid flowing through it. It does so by deflecting the flow moving through its rotor in the circumferential direction. This causes a torque to be applied to the rotor shaft, which may drive an electrical generator.
- Stream turbines are positioned in fluid streams, typically water, where they permit energy to be harvested from the flowing water. Some stream turbines have a shroud, also referred to as a duct or nozzle, over the rotor to alter the characteristics of the fluid flow through the rotor and to so enhance the efficiency of the turbine. At present, however, the use of shrouds tends to increase the drag on the turbine, making it unsuitable for certain applications.
- a stream turbine having a rotor secured to a shaft and operable by a fluid flowing therethrough and having a shroud over the rotor providing an inlet and an outlet and shaped to accelerate fluid flow within the shroud, characterized in that the outer surface of the shroud extends generally parallel to the shaft.
- an upstream nozzle ring to be provided co-axial with the rotor at or near the inlet and having a foil shape to cause a lift force on itself in a radially outward direction in a fluid stream; and for the ring to have a smaller diameter than the shroud.
- Still further features of the invention provide for a downstream nozzle ring to be provided co-axial with the rotor at or near the outlet and having a foil shape to cause a lift force on itself in a radially outward direction in a fluid stream; and for the ring to have a smaller diameter than the shroud.
- Yet further features of the invention provide for a mixer to be provided between the shroud and downstream nozzle ring, the mixer having a number of circumferentially spaced lobes opening in the direction of the nozzle ring.
- Figure 2 is front elevation of the stream turbine in Figure 1 ; and, Figure 3 is three-dimensional view of the stream turbine in Figure 1 .
- a stream turbine (1 ) is shown in Figures 1 to 3 and includes a rotor (3) consisting of a row of blades circumferentially mounted on a hub, secured to a shaft (4) and operable by a fluid flowing therethrough to drive a generator (not shown) housed in a generator casing (5) in a conventional fashion.
- a nose bullet (6) is provided in front of the rotor (3) and the generator is provided inside the casing (5) on the opposite side of the rotor (3).
- a streamlined shroud (7) is secured co-axially over the rotor (3), providing an inlet (9) and an outlet (1 1 ) with a fluid flow passage (13) therebetween.
- the shroud (7) has a foil shape which operatively accelerates fluid flow within the shroud (7) through the passage (13) and creates a lift force on the shroud (7) towards the turbine axis.
- a Clark Y type foil can typically be used.
- the rotor (3) is located at the minimum flow area formed between the shroud (7) and the generator casing (5) with a small amount of clearance provided between the tips of the rotor (3) and the shroud (7).
- the outer surface (14) of the shroud (7) extends generally parallel to the turbine axis to have a generally right cylindrical shape.
- the shroud (7) is supported by four circumferentially spaced struts (15, 16) extending from the generator casing (5) and nose bullet (6) on either side of the rotor (3).
- An upstream nozzle ring (17), of smaller diameter than the shroud (7), is located co-axially with the rotor (3) immediately adjacent the inlet (9) and has a foil shape to operatively cause lift force on itself in a radially outward direction, and cause a radially inward force on the flow, thereby reducing the negative angle of incidence at the shroud leading edge.
- the upstream nozzle ring (17) is supported by four circumferentially spaced struts (18) extending from the nose bullet (6). The end of the upstream nozzle ring (17) adjacent to the inlet is secured to the front of the struts (16) supporting the shroud (7).
- a mixer (19) extends from the outlet (1 1 ) to a downstream nozzle ring (21 ) which is secured co-axially with the rotor (3).
- the downstream nozzle ring (21 ) is of smaller diameter than the shroud (7) and has a foil shape which operatively causes a lift force on itself in a radially outward direction.
- Four circumferentially spaced struts (22) extending from the generator casing (5) support the downstream nozzle ring (21 ).
- the mixer (19) has a number of circumferentially spaced lobes (23) opening in a generally rearward direction so that flow therethrough is directed parallel to the turbine axis over the downstream nozzle ring (21 ).
- the mixer (19) thus has a circular shape where it attaches to the outlet (1 1 ) of the shroud (7) with a lobed shape at its rear.
- the inner curves of the lobes are complementary to the leading edge of the downstream nozzle ring (21 ) and the outer curves of the lobes remain tangent to a circle with approximately the same diameter as the outlet (1 1 ) of the shroud (7).
- the shroud (7) increases the axial velocity of the flow through it. This is achieved by the shroud wall being essentially an airfoil wrapped around the rotor (3) such that the lift vector is directed radially inwards, with the circulation around the airfoil assisting the through flow.
- the turbine design is modified to operate at a higher flow coefficient and lower thrust coefficient than a typical open ocean current or wind turbine. Since a turbine partially blocks the flow, it is always situated in a stream tube field that expands from upstream to downstream. Unless other measures are taken, this requires a basically cone shaped shroud expanding from front to rear, thereby increasing the drag compared to a shroud with a cylindrical external surface.
- the upstream and downstream flow contracting nozzles (17, 21 ) counter the stream tube expansion by having their lift vectors pointing radially outwards, thereby exerting a radially inward force on the flow in front of and behind the shroud (7).
- the upstream and downstream nozzles (17, 21 ) may exert a net forward force on the turbine, thereby reducing the total drag of the turbine.
- the function of the upstream nozzle (17) is to help direct flow into the shroud (7). It is required because the flow blockage effect of the turbine and shroud (7) causes the flow to diverge as it approaches the shroud (7). This reduces the angle of attack of the shroud (7) blade profile section, resulting in a lower lift coefficient and reduced flow through the shroud (7).
- the aerodynamic profile of the upstream nozzle (17) is selected such that the lift vector points radially outwards from the turbine axis.
- the chord line of the upstream nozzle (17) is oriented so that the vector sum of the lift and drag force results in a forward force, thereby reducing the total drag of the turbine.
- the function of the mixer (19) and downstream nozzle (21 ) is to help suck flow through the shroud (7). It is achieved by mixing higher velocity external flow with the lower velocity wake flow leaving the shroud (7).
- the lift vector of the downstream nozzle (21 ) profile points radially outwards and the circulation around the foil is such that it increases the velocity around its outside, thereby increasing suction at the mixer downstream side.
- the turbine provides advantages over prior art turbine systems in that the power generated is maximised compared to the power associated with the system drag and stream velocity. This is especially important if the turbine is attached to a system moving relative to a body of water or air as it maximises the ratio between the power generated by the turbine to the total power expended in dragging the turbine through the fluid.
- a row of full-span stator blades also called inlet guide vanes, may be located inside the shroud, upstream of the rotor. These would serve to pre-rotate the flow upstream of the rotor in such a way that the flow has minimal rotation when it leaves the rotor.
- Another stator blade row may be situated inside the shroud, downstream of the rotor to fully or partially achieve the same purpose.
- the struts (18, 22) supporting the upstream and downstream nozzles will preferably be streamlined in section and may be inclined to act as inlet or exit guide vanes.
Landscapes
- 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)
Abstract
A stream turbine (1) is provided having a rotor (3) secured to a shaft (4). A shroud (7) extends over the rotor and is shaped to accelerate fluid flow within the shroud. The outer surface (14) of the shroud extends generally parallel to the shaft (4). An upstream nozzle ring (17) and a downstream nozzle ring (21) are provided on either end of the shroud with a mixer (19) between the shroud and the downstream nozzle ring.
Description
A STREAM TURBINE
FIELD OF THE INVENTION
This invention relates to a turbine configured to generate electrical power when inserted into a flowing stream of water or air or any other suitable fluid. BACKGROUND TO THE INVENTION
A turbine is a mechanical device that extracts power from a fluid flowing through it. It does so by deflecting the flow moving through its rotor in the circumferential direction. This causes a torque to be applied to the rotor shaft, which may drive an electrical generator. Stream turbines are positioned in fluid streams, typically water, where they permit energy to be harvested from the flowing water. Some stream turbines have a shroud, also referred to as a duct or nozzle, over the rotor to alter the characteristics of the fluid flow through the rotor and to so enhance the efficiency of the turbine. At present, however, the use of shrouds tends to increase the drag on the turbine, making it unsuitable for certain applications.
SUMMARY OF THE INVENTION
In accordance with this invention there is provided a stream turbine having a rotor secured to a shaft and operable by a fluid flowing therethrough and having a shroud over the rotor providing an inlet and an outlet and shaped to accelerate fluid flow within the shroud, characterized in that the outer surface of the shroud extends generally parallel to the shaft.
Further features of the invention provide for an upstream nozzle ring to be provided co-axial with the rotor at or near the inlet and having a foil shape to cause a lift force on itself in a radially outward direction in a fluid stream; and for the ring to have a smaller diameter than the shroud.
Still further features of the invention provide for a downstream nozzle ring to be provided co-axial with the rotor at or near the outlet and having a foil shape to cause a lift force on itself in a radially outward direction in a fluid stream; and for the ring to have a smaller diameter than the shroud.
Yet further features of the invention provide for a mixer to be provided between the shroud and downstream nozzle ring, the mixer having a number of circumferentially spaced lobes opening in the direction of the nozzle ring.
BRIEF DESCRIPTION OF THE DRAWINGS
In the drawings:- Figure 1 is a sectional side elevation of a stream turbine;
Figure 2 is front elevation of the stream turbine in Figure 1 ; and, Figure 3 is three-dimensional view of the stream turbine in Figure 1 .
DETAILED DESCRIPTION WITH REFERENCE TO THE DRAWINGS
A stream turbine (1 ) is shown in Figures 1 to 3 and includes a rotor (3) consisting of a row of blades circumferentially mounted on a hub, secured to a shaft (4) and operable by a fluid flowing therethrough to drive a generator (not shown) housed in a generator casing (5) in a conventional fashion. A nose bullet (6) is provided in front of the rotor (3) and the generator is
provided inside the casing (5) on the opposite side of the rotor (3).
A streamlined shroud (7) is secured co-axially over the rotor (3), providing an inlet (9) and an outlet (1 1 ) with a fluid flow passage (13) therebetween. The shroud (7) has a foil shape which operatively accelerates fluid flow within the shroud (7) through the passage (13) and creates a lift force on the shroud (7) towards the turbine axis. A Clark Y type foil can typically be used.
The rotor (3) is located at the minimum flow area formed between the shroud (7) and the generator casing (5) with a small amount of clearance provided between the tips of the rotor (3) and the shroud (7).
In accordance with the invention the outer surface (14) of the shroud (7) extends generally parallel to the turbine axis to have a generally right cylindrical shape. The shroud (7) is supported by four circumferentially spaced struts (15, 16) extending from the generator casing (5) and nose bullet (6) on either side of the rotor (3).
An upstream nozzle ring (17), of smaller diameter than the shroud (7), is located co-axially with the rotor (3) immediately adjacent the inlet (9) and has a foil shape to operatively cause lift force on itself in a radially outward direction, and cause a radially inward force on the flow, thereby reducing the negative angle of incidence at the shroud leading edge. The upstream nozzle ring (17) is supported by four circumferentially spaced struts (18) extending from the nose bullet (6). The end of the upstream nozzle ring (17) adjacent to the inlet is secured to the front of the struts (16) supporting the shroud (7).
A mixer (19) extends from the outlet (1 1 ) to a downstream nozzle ring (21 ) which is secured co-axially with the rotor (3). The downstream nozzle ring (21 ) is of smaller diameter than the shroud (7) and has a foil shape which operatively causes a lift force on itself in a radially outward direction. Four circumferentially spaced struts (22) extending from the generator casing (5)
support the downstream nozzle ring (21 ).
The mixer (19) has a number of circumferentially spaced lobes (23) opening in a generally rearward direction so that flow therethrough is directed parallel to the turbine axis over the downstream nozzle ring (21 ). The mixer (19) thus has a circular shape where it attaches to the outlet (1 1 ) of the shroud (7) with a lobed shape at its rear. The inner curves of the lobes are complementary to the leading edge of the downstream nozzle ring (21 ) and the outer curves of the lobes remain tangent to a circle with approximately the same diameter as the outlet (1 1 ) of the shroud (7).
In use, the shroud (7) increases the axial velocity of the flow through it. This is achieved by the shroud wall being essentially an airfoil wrapped around the rotor (3) such that the lift vector is directed radially inwards, with the circulation around the airfoil assisting the through flow. The turbine design is modified to operate at a higher flow coefficient and lower thrust coefficient than a typical open ocean current or wind turbine. Since a turbine partially blocks the flow, it is always situated in a stream tube field that expands from upstream to downstream. Unless other measures are taken, this requires a basically cone shaped shroud expanding from front to rear, thereby increasing the drag compared to a shroud with a cylindrical external surface. The upstream and downstream flow contracting nozzles (17, 21 ) counter the stream tube expansion by having their lift vectors pointing radially outwards, thereby exerting a radially inward force on the flow in front of and behind the shroud (7). Designed with correctly inclined wall angles, the upstream and downstream nozzles (17, 21 ) may exert a net forward force on the turbine, thereby reducing the total drag of the turbine.
Thus, the function of the upstream nozzle (17) is to help direct flow into the shroud (7). It is required because the flow blockage effect of the turbine and shroud (7) causes the flow to diverge as it approaches the shroud (7). This reduces the angle of attack of the shroud (7) blade profile section, resulting in
a lower lift coefficient and reduced flow through the shroud (7). The aerodynamic profile of the upstream nozzle (17) is selected such that the lift vector points radially outwards from the turbine axis. The chord line of the upstream nozzle (17) is oriented so that the vector sum of the lift and drag force results in a forward force, thereby reducing the total drag of the turbine.
The function of the mixer (19) and downstream nozzle (21 ) is to help suck flow through the shroud (7). It is achieved by mixing higher velocity external flow with the lower velocity wake flow leaving the shroud (7). The lift vector of the downstream nozzle (21 ) profile points radially outwards and the circulation around the foil is such that it increases the velocity around its outside, thereby increasing suction at the mixer downstream side.
When using a Clark YH foil profile for the shape of the shroud (7), it will form a slightly tucked-in rear edge, thereby facilitating flow into the mixer (19).
The turbine provides advantages over prior art turbine systems in that the power generated is maximised compared to the power associated with the system drag and stream velocity. This is especially important if the turbine is attached to a system moving relative to a body of water or air as it maximises the ratio between the power generated by the turbine to the total power expended in dragging the turbine through the fluid.
It will be appreciated that many other embodiments of a stream turbine exist which fall within the scope of the invention, particularly regarding the foil shapes and configuration of the turbine. For example, a row of full-span stator blades, also called inlet guide vanes, may be located inside the shroud, upstream of the rotor. These would serve to pre-rotate the flow upstream of the rotor in such a way that the flow has minimal rotation when it leaves the rotor. Another stator blade row may be situated inside the shroud, downstream of the rotor to fully or partially achieve the same purpose. The struts (18, 22) supporting the upstream and downstream nozzles will
preferably be streamlined in section and may be inclined to act as inlet or exit guide vanes.
Claims
A stream turbine (1 ) having a rotor (3) secured to a shaft (4) and operable by a fluid flowing therethrough and having a shroud (7) over the rotor providing an inlet (9) and an outlet (1 1 ) and shaped to accelerate fluid flow within the shroud (7), characterized in that the outer surface (14) of the shroud extends generally parallel to the shaft (4).
A stream turbine as claimed in claim 1 in which an upstream nozzle ring (17) is provided co-axial with the rotor at or near the inlet and has a foil shape to cause a lift force on itself in a radially outward direction in a fluid stream.
A stream turbine as claimed in claim 1 in which the upstream nozzle ring (17) has a smaller diameter than the shroud.
A stream turbine as claimed in any one of the preceding claims in which a downstream nozzle ring (21 ) is provided co-axial with the rotor at or near the outlet and has a foil shape to cause a lift force on itself in a radially outward direction in a fluid stream.
A stream turbine as claimed in claim 4 in which the downstream nozzle ring (21 ) has a smaller diameter than the shroud.
A stream turbine as claimed in any one of the preceding claims in which a mixer (19) is provided between the shroud and the downstream nozzle ring, and wherein the mixer has a number of circumferentially spaced lobes (23) opening in the direction of the downstream nozzle ring.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
ZA2013/01624 | 2013-03-04 | ||
ZA201301624 | 2013-03-04 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2014136032A1 true WO2014136032A1 (en) | 2014-09-12 |
Family
ID=50343812
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/IB2014/059385 WO2014136032A1 (en) | 2013-03-04 | 2014-03-03 | A stream turbine |
Country Status (1)
Country | Link |
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WO (1) | WO2014136032A1 (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2512567B (en) * | 2013-01-23 | 2018-05-23 | Paunovic Nenad | Wind and hydro turbines turbulence control mechanism |
EP3473848A1 (en) * | 2017-10-20 | 2019-04-24 | FlowGen Development & Management GmbH | Flow energy installation, in particular a wind turbine with a jacket |
WO2020025106A1 (en) * | 2018-07-31 | 2020-02-06 | Flowgen Development & Management Gmbh | Wind power plant |
USD949792S1 (en) | 2019-04-10 | 2022-04-26 | FlowGen Development & Management AG | Wind turbine |
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FR866053A (en) * | 1940-02-27 | 1941-06-16 | Device of air conduits creating pressures and depressions to improve the efficiency of wind engines | |
US4021135A (en) * | 1975-10-09 | 1977-05-03 | Pedersen Nicholas F | Wind turbine |
GB1539566A (en) * | 1975-07-10 | 1979-01-31 | Eckel O | Wind turbine |
DE10036307A1 (en) * | 2000-07-26 | 2002-02-21 | Alstom Power Nv | Device converting flowing liquid kinetic energy into current has turbine wheel in open housing with upstream inlet part with concave inner surface line, expanding downstream section |
DE10145786A1 (en) * | 2001-09-17 | 2003-04-10 | Kbe Windpower Gmbh | Wind power turbine with housing enclosing rotor blades has aerodynamically shaped outer housing, e.g. consisting of surface coated hard foam body or plastic with joined inner, outer walls |
US20080240916A1 (en) * | 2007-03-27 | 2008-10-02 | Krouse Wayne F | System and apparatus for improved turbine pressure and pressure drop control |
US20100316487A1 (en) * | 2007-03-23 | 2010-12-16 | Flodesign Wind Turbine Corporation | Wind turbine |
US20120248778A1 (en) * | 2011-03-30 | 2012-10-04 | Chih-Wei Yen | Hydroelectric generator |
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FR866053A (en) * | 1940-02-27 | 1941-06-16 | Device of air conduits creating pressures and depressions to improve the efficiency of wind engines | |
GB1539566A (en) * | 1975-07-10 | 1979-01-31 | Eckel O | Wind turbine |
US4021135A (en) * | 1975-10-09 | 1977-05-03 | Pedersen Nicholas F | Wind turbine |
DE10036307A1 (en) * | 2000-07-26 | 2002-02-21 | Alstom Power Nv | Device converting flowing liquid kinetic energy into current has turbine wheel in open housing with upstream inlet part with concave inner surface line, expanding downstream section |
DE10145786A1 (en) * | 2001-09-17 | 2003-04-10 | Kbe Windpower Gmbh | Wind power turbine with housing enclosing rotor blades has aerodynamically shaped outer housing, e.g. consisting of surface coated hard foam body or plastic with joined inner, outer walls |
US20100316487A1 (en) * | 2007-03-23 | 2010-12-16 | Flodesign Wind Turbine Corporation | Wind turbine |
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Cited By (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2512567B (en) * | 2013-01-23 | 2018-05-23 | Paunovic Nenad | Wind and hydro turbines turbulence control mechanism |
EP3473848A1 (en) * | 2017-10-20 | 2019-04-24 | FlowGen Development & Management GmbH | Flow energy installation, in particular a wind turbine with a jacket |
WO2019076514A1 (en) | 2017-10-20 | 2019-04-25 | Flowgen Development & Management Gmbh | Flow energy installation, in particular encased wind turbine |
CN111279068A (en) * | 2017-10-20 | 2020-06-12 | 流程图生成程序开发管理有限责任公司 | Fluid energy device, in particular wind turbine |
JP2020537729A (en) * | 2017-10-20 | 2020-12-24 | フローゲン ディベロップメント アンド マネジメント ゲゼルシャフト ミット ベシュレンクテル ハフツング | Flow energy systems, especially jacketed wind turbines |
US11248581B2 (en) | 2017-10-20 | 2022-02-15 | FlowGen Development & Management AG | Flow energy installation, in particular encased wind turbine |
JP7221284B2 (en) | 2017-10-20 | 2023-02-13 | フローゲン ディベロップメント アンド マネジメント アクチェンゲゼルシャフト | Flow energy systems, especially jacketed wind turbines |
WO2020025106A1 (en) * | 2018-07-31 | 2020-02-06 | Flowgen Development & Management Gmbh | Wind power plant |
CN112513453A (en) * | 2018-07-31 | 2021-03-16 | 流程图生成程序开发管理有限责任公司 | Wind power generation plant |
US11572860B2 (en) | 2018-07-31 | 2023-02-07 | FlowGen Development & Management AG | Wind power plant |
USD949792S1 (en) | 2019-04-10 | 2022-04-26 | FlowGen Development & Management AG | Wind turbine |
USD949791S1 (en) | 2019-04-10 | 2022-04-26 | FlowGen Development & Management AG | Power station |
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