WO2012016283A1 - Screw turbine and method of power generation - Google Patents
Screw turbine and method of power generation Download PDFInfo
- Publication number
- WO2012016283A1 WO2012016283A1 PCT/AU2011/000983 AU2011000983W WO2012016283A1 WO 2012016283 A1 WO2012016283 A1 WO 2012016283A1 AU 2011000983 W AU2011000983 W AU 2011000983W WO 2012016283 A1 WO2012016283 A1 WO 2012016283A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- turbine blade
- helical turbine
- helical
- screw
- lead
- Prior art date
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- F01D5/00—Blades; Blade-carrying members; Heating, heat-insulating, cooling or antivibration means on the blades or the members
- F01D5/12—Blades
- F01D5/14—Form or construction
- F01D5/141—Shape, i.e. outer, aerodynamic form
-
- 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
- F03B3/08—Machines or engines of reaction type; Parts or details peculiar thereto with pressure-velocity transformation exclusively in rotors
-
- 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
-
- 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
- F05B2240/243—Rotors for turbines of the Archimedes screw type
-
- 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
- the present invention relates to a screw turbine and method of power generation which employs same.
- the invention relates to an Archimedean screw turbine including a helical turbine blade which has a relatively small helix angle and which, in use, advantageously does not require or employ an outer sheath that houses it.
- turbines include, for example, cross-flow turbines, Kaplan turbines and Archimedean screw turbines.
- a cylindrical water wheel or runner with a horizontal shaft is provided.
- the wheel or runner includes a number of blades arranged radially and tangentially. The blade edges may be sharpened to reduce resistance to the flow of water.
- the water passes through the turbine transversely, or across the turbine blades.
- the water is admitted at the turbine's edge.
- the cross-flow turbine is a low-speed machine that is well suited for locations with a low head but high flow.
- the Kaplan turbine is a propeller-type water turbine which has adjustable blades. It was developed in 1913 by Viktor Kaplan, who combined automatically adjusted propeller blades with automatically adjusted wicket gates to achieve efficiency over a wide range of flows and water levels.
- the Kaplan turbine is an inward flow reaction turbine. As such, the working fluid changes pressure as- it moves through the turbine and gives up its energy.
- the design combines radial and axial features.
- the Archimedean screw turbine was developed based on the principle of the Archimedes screw.
- the Archimedes screw is a type of water pump which has been known for centuries. To pump water from the bottom to the top, the pump needs to be twisted, either manually or through some other mechanism, such as a windmill.
- the Archimedean screw turbine is basically an inverted Archimedes screw which utilises water to drive the screw and conversion of the energy through a generator.
- Betz law may similarly apply to water turbines, although it is thought that there are some additional factors in play in this environment. Particularly, it is thought that higher efficiency may be obtained in water turbines compared with wind turbines as water is not compressible. Therefore, some energy may also be imparted in the form of pressure, in addition to the kinetic energy of the water. Even so, there are limits to the efficiency that may be obtained using existing water turbines.
- the present invention aims to provide an alternative form of water turbine, in the form of an Archimedean screw turbine, which may provide improved efficiency under certain conditions compared with existing examples of water turbines.
- a screw turbine comprising:
- a generator associated with the helical turbine blade which converts energy imparted to the helical turbine blade to electricity
- the diameter of the helical turbine blade is less than the lead of the helical turbine blade and wherein the screw turbine is adapted to permit lateral exchange of fluid in use.
- the term “lead” is intended to mean the distance between consecutive contours of the helical turbine blade measured parallel to the axis of the blade. This is identified as distance "b" in Figure 1.
- lateral exchange is intended to mean that fluid that has lost energy (i.e. has slowed) by transfer to rotation of the helical turbine blade is radially emitted from the helical turbine blade such that it is replaced by fluid having a higher energy. For example, if the screw turbine is submerged in moving water, water that has transferred energy to rotation of the helical turbine blade (i.e. has slowed) may be radially emitted and replaced with faster flowing water.
- the screw turbine of the invention may surprisingly give good results, particularly in applications involving low flow rates. It is thought that the screw turbine of the invention may provide for a proportional increase, or close thereto, in power generated as the length of the helical turbine blade increases. That is, it may be possible to provide turbines that overcome the Betz limit historically considered relevant to such systems.
- the helical turbine blade of the screw turbine is unsheathed in use to permit lateral exchange of fluid. It is envisaged that this may also be achieved by providing sufficient spacing between the helical turbine blade and an outer sheathing surrounding it, or by providing such an outer sheathing with sufficient venting to allow fluid to be radially emitted.
- the relationship between the diameter and lead of the helical turbine blade is not particularly limited, with the proviso that the diameter of the helical turbine blade is less than the lead of the helical turbine blade. That is, the "twist" of the helical turbine blade is relatively gentle. In a preferred embodiment, the ratio of diameter and lead of the helical turbine blade is about 1 :8.
- the helical turbine blade may preferably have a lead angle of from 50-75°, for example of about 60-75°. In certain embodiments, though, the lead angle may be as high as 80°. Such angles, corresponding with a relatively small helix angle, provide blades with a relatively gentle twist.
- the helical turbine blade is an axleless helix.
- axleless helix is intended to mean that the blade does not include a central axle around which the blade is mounted (i.e. as with conventional Archimedes screws), but is constituted by a strip of material with twists along its length. This is best represented in Figures 2 and 3.
- the helical turbine blade may be mounted by any suitable means.
- the blade may be mounted on a structure that is constructed in a body of water (i.e. secured within the river bed), or may be mounted at the distal end of an arm secured to and extending from, for example, a river bank or shore.
- the form of mounting will be somewhat dependent on particular environment involved.
- the blade must be mounted for rotation, for example through a coupling provided with bearings which facilitates rotation of the blade about its longitudinal axis.
- the helical turbine blade may be coupled to a generator in the usual manner.
- a drive shaft associated with the blade may be engaged with gearing that engages the generator to produce electricity.
- gearing it will be preferred that the gearing operate at low revolutions (revs) and high torque. That is, it will be preferred that there be a relatively high gearing ratio. This may be dependent on the particular circumstances of use.
- a helical turbine blade for a screw turbine comprising an axleless helix, the diameter of the axleless helix being less than the lead of the axleless helix.
- the ratio of diameter and lead of the helical turbine blade is preferably about 1 :8.
- the helical turbine blade preferably has a lead angle of from 50-75°, for example of about 60-75°, but may be as high as 80°.
- the helical turbine blade may be formed from any suitable material, for example steel or comparable material. It may be formed from a composite material.
- a method of power generation comprising:
- screw turbine is adapted to permit lateral exchange of water as the helical turbine blade is rotated by the moving water.
- the screw turbine is submerged unsheathed to permit lateral exchange of water as the helical turbine blade is rotated by the moving water.
- Other possible embodiments are disclosed above, but are not considered preferable.
- the energy imparted to the helical turbine blade is converted to electricity through a generator.
- the energy may be converted to mechanical energy and used for alternative purposes.
- the diameter of the helical turbine blade is generally less than the lead of the helical turbine blade.
- the helical turbine blade may comprise an axleless helix, the diameter of the axleless helix being less than the lead of the axleless helix.
- the ratio of diameter and lead of the helical turbine blade is preferably about 1 :8.
- the helical turbine blade may have a lead angle of from about 50- 75°, for example of about 60-75°.
- Figure 1 illustrates a side view of a helical turbine blade
- Figures 2 and 3 illustrate perspective views of a helical turbine blade.
- the helical turbine blade takes the form of an axleless helix.
- the helical turbine blade is constituted by a strip of material, for example steel or other suitable material, which is twisted along its length.
- the twists are relatively gentle, and therefore the helix angle ⁇ relatively small. Consequently, the lead angle a is relatively large. This is particularly the case compared with conventional screw turbines, the blades of which are generally provided with a much greater degree of raking.
- the diameter "a” of the helical turbine blade is less than the lead "b" of the blade.
- the ratio of diameter to lead is just over 1 :8. This configuration in combination with the omission of an axle is thought to facilitate better lateral exchange of fluid in use.
- the helical turbine blade is submerged in moving water without any sheathing.
- water will power the blade forcing it to rotate, lose energy and speed and be radially emitted from the blade allowing faster water to take its place. Therefore, as the length of the helical turbine blade increases, it is envisaged that the power generated will proportionally increase.
- the helical turbine blade and the screw turbine employing it will be useful in slow flowing rivers and other environments with relatively small currents.
- the screw turbine may be a viable alternative to the hydroelectric schemes proposed for the Amazon River. Taking this example, the invention may provide substantial advantages including the ability to provide power while maintaining tribal land that is threatened by the proposed scheme (i.e. the building of a series of massive dams throughout the Amazon Basin).
- the helical turbine blade is not rotated quickly or aggressively, and therefore works on relatively low efficiency, due to the fact that the helix angle is small (opposite to a propeller).
- the medium i.e. water
- the medium has a chance to act on a relatively large surface area which then increases the total amount of power transferred to the rotation.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Hydraulic Turbines (AREA)
- Other Liquid Machine Or Engine Such As Wave Power Use (AREA)
Abstract
Description
Claims
Priority Applications (6)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN2011800435722A CN103124847A (en) | 2010-08-03 | 2011-08-03 | Screw turbine and method of power generation |
JP2013522057A JP2013532796A (en) | 2010-08-03 | 2011-08-03 | Screw turbine and power generation method |
AU2011286162A AU2011286162B2 (en) | 2010-08-03 | 2011-08-03 | Screw turbine and method of power generation |
EP11813947.6A EP2601407A4 (en) | 2010-08-03 | 2011-08-03 | Screw turbine and method of power generation |
BR112013002502A BR112013002502A2 (en) | 2010-08-03 | 2011-08-03 | screw turbine, turbine blade and power generation method |
US13/757,254 US20130177424A1 (en) | 2010-08-03 | 2013-02-01 | Screw turbine and method of power generation |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AU2010903459 | 2010-08-03 | ||
AU2010903459A AU2010903459A0 (en) | 2010-08-03 | Screw turbine blade |
Related Child Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US13/757,254 Continuation US20130177424A1 (en) | 2010-08-03 | 2013-02-01 | Screw turbine and method of power generation |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2012016283A1 true WO2012016283A1 (en) | 2012-02-09 |
Family
ID=45558847
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/AU2011/000983 WO2012016283A1 (en) | 2010-08-03 | 2011-08-03 | Screw turbine and method of power generation |
Country Status (8)
Country | Link |
---|---|
US (1) | US20130177424A1 (en) |
EP (1) | EP2601407A4 (en) |
JP (1) | JP2013532796A (en) |
CN (1) | CN103124847A (en) |
AU (1) | AU2011286162B2 (en) |
BR (1) | BR112013002502A2 (en) |
CO (1) | CO6680682A2 (en) |
WO (1) | WO2012016283A1 (en) |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN103708274A (en) * | 2012-10-02 | 2014-04-09 | 住友橡胶工业株式会社 | Rubber band conveying and cutting device |
WO2014134994A1 (en) * | 2013-03-04 | 2014-09-12 | Wang Jun | Shaftless screw gear generating device |
US9051918B1 (en) | 2011-02-25 | 2015-06-09 | Leidos, Inc. | Vertical axis wind turbine with tensile support structure having rigid or collapsible vanes |
US9133815B1 (en) | 2011-05-11 | 2015-09-15 | Leidos, Inc. | Propeller-type double helix turbine apparatus and method |
GR1009116B (en) * | 2016-05-11 | 2017-09-14 | Ευθαλια Γεωργιου Καλαμπαλικη-Τσιτσιγιαννη | Hydro-turbine |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
AU2012216345A1 (en) * | 2012-08-22 | 2014-03-13 | Hartley, Andrew Paul Mr | Hubless Screw turbine pump |
CN103742342B (en) * | 2014-01-24 | 2016-08-17 | 中国水利水电科学研究院 | Water kinetic energy conversion device |
MX2016012488A (en) * | 2014-03-24 | 2017-05-08 | Pepsico Inc | Hydration monitoring system. |
KR101661267B1 (en) * | 2015-04-23 | 2016-09-29 | 정민시 | Non-Axis Screw Generating Apparatus |
US10072631B2 (en) | 2015-06-29 | 2018-09-11 | II Michael John Van Asten | Spiral turbine blade having at least one concave compartment that may be rotated by a moving fluid for electrical energy generation |
CN110371083B (en) * | 2019-08-21 | 2021-04-16 | 德清县诚达金属材料有限公司 | Vehicle-mounted dust remover |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
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US20070029807A1 (en) * | 2005-08-08 | 2007-02-08 | Clayton Kass | Methods and systems for generating wind energy |
WO2009018666A1 (en) * | 2007-08-08 | 2009-02-12 | Rokeby-Thomas Andrew Byron Rhy | Transverse-axis turbine with twisted foils |
AU2009206829B2 (en) * | 2008-01-24 | 2011-03-24 | Flumill As | Turbine arrangement |
Family Cites Families (13)
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US2154397A (en) * | 1937-07-19 | 1939-04-11 | Herman Walter Cook Sr | Wave motor |
US4443708A (en) * | 1973-06-25 | 1984-04-17 | The Laitram Corporation | Apparatus for storing the energy of ocean waves |
US4490232A (en) * | 1981-10-29 | 1984-12-25 | The Laitram Corporation | Wave-powered electrolysis of water |
US4708592A (en) * | 1985-04-15 | 1987-11-24 | Wind Production Company | Helicoidal structures, useful as wind turbines |
US4717832A (en) * | 1985-09-17 | 1988-01-05 | Harris Charles W | Tidal and river turbine |
US4816697A (en) * | 1987-02-05 | 1989-03-28 | Nalbandyan Nikolaes A | Portable hydroelectric power unit |
US4849647A (en) * | 1987-11-10 | 1989-07-18 | Mckenzie T Curtis | Floating water turbine |
US5642984A (en) * | 1994-01-11 | 1997-07-01 | Northeastern University | Helical turbine assembly operable under multidirectional fluid flow for power and propulsion systems |
US6966747B2 (en) * | 2003-04-30 | 2005-11-22 | Taylor Ronald J | Wind turbine having airfoils for blocking and directing wind and rotors with or without a central gap |
EP1825140A1 (en) * | 2004-10-20 | 2007-08-29 | Vortech Energy & Power Pty Limited | Vertical axis wind turbine with twisted blade or auxiliary blade |
US7633174B1 (en) * | 2007-02-27 | 2009-12-15 | Fred John Feiler | Floating water turbine for a power plant |
JP4022244B2 (en) * | 2007-04-06 | 2007-12-12 | シーベルインターナショナル株式会社 | Hydroelectric generator |
US7728454B1 (en) * | 2008-11-20 | 2010-06-01 | Anderson Jr Winfield Scott | Tapered helical auger turbine to convert hydrokinetic energy into electrical energy |
-
2011
- 2011-08-03 CN CN2011800435722A patent/CN103124847A/en active Pending
- 2011-08-03 JP JP2013522057A patent/JP2013532796A/en not_active Withdrawn
- 2011-08-03 AU AU2011286162A patent/AU2011286162B2/en not_active Ceased
- 2011-08-03 EP EP11813947.6A patent/EP2601407A4/en not_active Withdrawn
- 2011-08-03 BR BR112013002502A patent/BR112013002502A2/en not_active Application Discontinuation
- 2011-08-03 WO PCT/AU2011/000983 patent/WO2012016283A1/en active Application Filing
-
2013
- 2013-02-01 US US13/757,254 patent/US20130177424A1/en not_active Abandoned
- 2013-02-28 CO CO13040957A patent/CO6680682A2/en not_active Application Discontinuation
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20070029807A1 (en) * | 2005-08-08 | 2007-02-08 | Clayton Kass | Methods and systems for generating wind energy |
WO2009018666A1 (en) * | 2007-08-08 | 2009-02-12 | Rokeby-Thomas Andrew Byron Rhy | Transverse-axis turbine with twisted foils |
AU2009206829B2 (en) * | 2008-01-24 | 2011-03-24 | Flumill As | Turbine arrangement |
Non-Patent Citations (1)
Title |
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See also references of EP2601407A4 * |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US9051918B1 (en) | 2011-02-25 | 2015-06-09 | Leidos, Inc. | Vertical axis wind turbine with tensile support structure having rigid or collapsible vanes |
US9133815B1 (en) | 2011-05-11 | 2015-09-15 | Leidos, Inc. | Propeller-type double helix turbine apparatus and method |
CN103708274A (en) * | 2012-10-02 | 2014-04-09 | 住友橡胶工业株式会社 | Rubber band conveying and cutting device |
CN103708274B (en) * | 2012-10-02 | 2017-04-12 | 住友橡胶工业株式会社 | Rubber band conveying and cutting device |
WO2014134994A1 (en) * | 2013-03-04 | 2014-09-12 | Wang Jun | Shaftless screw gear generating device |
GR1009116B (en) * | 2016-05-11 | 2017-09-14 | Ευθαλια Γεωργιου Καλαμπαλικη-Τσιτσιγιαννη | Hydro-turbine |
Also Published As
Publication number | Publication date |
---|---|
EP2601407A1 (en) | 2013-06-12 |
AU2011286162A1 (en) | 2013-02-07 |
JP2013532796A (en) | 2013-08-19 |
EP2601407A4 (en) | 2013-10-30 |
US20130177424A1 (en) | 2013-07-11 |
CN103124847A (en) | 2013-05-29 |
AU2011286162B2 (en) | 2016-08-25 |
CO6680682A2 (en) | 2013-05-31 |
BR112013002502A2 (en) | 2016-05-31 |
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