WO2004067957A1 - A screw turbine device - Google Patents

A screw turbine device Download PDF

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Publication number
WO2004067957A1
WO2004067957A1 PCT/NO2004/000026 NO2004000026W WO2004067957A1 WO 2004067957 A1 WO2004067957 A1 WO 2004067957A1 NO 2004000026 W NO2004000026 W NO 2004000026W WO 2004067957 A1 WO2004067957 A1 WO 2004067957A1
Authority
WO
WIPO (PCT)
Prior art keywords
turbine
screw
screw turbine
blade
axis
Prior art date
Application number
PCT/NO2004/000026
Other languages
French (fr)
Inventor
Jan Inge Eielsen
Original Assignee
Flucon As
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 Flucon As filed Critical Flucon As
Priority to JP2006502759A priority Critical patent/JP2006516698A/en
Priority to EP04705967A priority patent/EP1592885A1/en
Priority to US10/543,255 priority patent/US20060257241A1/en
Priority to CA002514965A priority patent/CA2514965A1/en
Priority to EA200501124A priority patent/EA007080B1/en
Priority to AU2004208073A priority patent/AU2004208073A1/en
Publication of WO2004067957A1 publication Critical patent/WO2004067957A1/en

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
    • F03D—WIND MOTORS
    • F03D1/00—Wind motors with rotation axis substantially parallel to the air flow entering the rotor 
    • F03D1/06—Rotors
    • F03D1/0608—Rotors characterised by their aerodynamic shape
    • F03D1/0633—Rotors characterised by their aerodynamic shape of the blades
    • 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 
    • 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
    • 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

Definitions

  • This invention regards a turbine, more particularly a screw turbine suitable for use both in flowing liquids and gas.
  • Windmills of the type used in large wind power plants generic- ate a lot of noise and are thought by many to spoil the landscape. Their reliability however, is satisfactory.
  • Document GB 2057584 concerns a wind turbine comprising an assemblage of a number of helical rotors.
  • the turbine blades are constructed with an approximate dar-
  • WO 01/48374 describes a turbine where the aeroplane wing shaped principal turbine blades disposed at a distance from the axis of rotation of the turbine are provided with further aero-
  • the object of the invention is to remedy the disadvantages of prior art.
  • a relatively high efficiency is achieved by placing a screw turbine having a suitably shaped screw geometry, in a fluid flow.
  • a screw turbine is constituted by a screw profile wrapped around an axis, wherein the actual screw profile projects radially from the axis with a relatively small cross sectional thickness.
  • the screw profile may have the same or a variable pitch along the axis.
  • the cross section of the blade is given a geometry similar to that of an aeroplane wing.
  • a cross section of the screw blade parallel to the direction of fluid flow will typically define a profile similar to that of an aeroplane wing, projecting from the central axis.
  • the pressure and flow faces are moved along the screw turbine during the rotation of the screw turbine.
  • the screw turbine may be used at any orientation as long as the direction of fluid flow relative to the central axis of the screw turbine is substantially the same as the screw pitch.
  • the screw turbine may be provided with a rotatable mounting.
  • the turbine construction may in- elude buoyancy elements that cause the turbine to assume an upward position, and where the current in the water rotates the axis of the turbine to a favourable position relative to the direction of flow.
  • the turbine may also be used suspended from a corresponding suspension, e.g. underneath a moored raft.
  • the geometry of the turbine blade must be adjusted for among other things fluid viscosity and density for each application.
  • the shaft of the screw turbine may, in a manner that is known per se, be connected to a generator for generation of elec- trical power or to another device that requires energy, e.g. a pump.
  • Figure 1 schematically shows a screw turbine seen from the upstream face of the fluid
  • Figure 2 schematically shows an example embodiment in which the screw turbine is mounted in a fluid flow
  • Figure 3 shows a section II-II in figure 2.
  • Figure 4 schematically shows an example embodiment in which the screw turbine is rotatably mounted under water.
  • reference number 1 denotes a screw turbine comprising a shaft 2, the shaft 2 being rotatably supported in bearings 3, and a helical turbine blade 4.
  • Figure 1 shows the screw turbine 1 from the direction of inflow of the fluid flowing through/past the screw turbine 1.
  • the direction of flow relative to the central axis 6 of the screw turbine 1 must be approximately equal to the pitch angle 8 of the turbine blade 4, see figure 2.
  • the flowing fluid passes, with reference to figure 1, on the underside of the central axis 6, through the openings 10 between the parts of the turbine blade 4 positioned in the downward direction, indicated by reference number 12 in figure 1.
  • the portion 14 of the turbine blade projecting upwards from the central axis 6 constitutes an obstruction to flow, and hence is subjected to a pressure force from the flowing fluid when the fluid impinges on the blade portion 14.
  • the screw turbine is caused to rotate about its own central axis 6.
  • the shape of the cross sectional geometry of the turbine blade 4 has proven to have a significant effect on the hydraulic efficiency of the turbine 1. The highest efficiency is achieved when the cross section of the turbine blade 4 along the direction of flow is constructed with a cross sectional profile 15 like that of an aeroplane wing, see figure 2.
  • the flowing fluid that encounters the turbine blade 4 at the upstream edge 16 of the turbine blade 4 is split, and the fluid flowing along the top surface of the cross sectional profile 15 must, in a manner that is known per se, increase its velocity, whereby the static pressure falls, resulting in a pressure difference between the top surface and the lower surface of the cross sectional profile 15.
  • the pressure difference causes the blade portions of the turbine blade 4 projecting in the upstream direction relative to the direction of fluid flow to be subjected to a lift force that results in additional torque about the axis 2.
  • the screw turbine 1 is mounted in a flow of water.
  • the shaft 2 of the screw turbine 1 is supported by bear- ings 3 at both ends and is connected to a generator 18.
  • the bearings 3 are coupled to a structure 17.
  • the water flowing against the screw turbine 1 causes this to rotate, whereby the generator 18 may produce electric energy.
  • the direction of flow is indicated by arrows in figure 2.
  • the screw turbine 1 is disposed under water.
  • the shaft 2 of the screw turbine 1 is connected to a generator 18 via bearings 3.
  • the screw turbine 1 and the generator 18 are rotatably connected to a foundation 20 on the seabed 22.
  • the turbine blade 4 is constructed so as to have sufficient buoyancy. The buoyancy force causes the screw turbine 1 to be raised towards a vertical position, while the force from the flowing fluid rotates the screw turbine 1 in the direction of flow until the screw turbine 1 assumes a favourable orienta- tion relative to the direction of fluid flow.
  • the direction of flow is indicated by arrows in figure 4.
  • the screw turbine may be mounted in a suspended manner from an appropriate fixture or form part of a bank of turbines .

Landscapes

  • Engineering & Computer Science (AREA)
  • Combustion & Propulsion (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Sustainable Energy (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Hydraulic Turbines (AREA)
  • Other Liquid Machine Or Engine Such As Wave Power Use (AREA)
  • Screw Conveyors (AREA)

Abstract

A screw turbine device (1) comprising at least one helical blade (4) that is rotatable about an axis (6), the cross section of the blade (4) being in the shape of the profile (15) of an aeroplane wing, and where the aeroplane wing-like profile (15) projects from the outer radial extent of the blade (4) and in to the shaft (2) of the screw turbine (1).

Description

A SCREW TURBINE DEVICE
This invention regards a turbine, more particularly a screw turbine suitable for use both in flowing liquids and gas.
The use of windmills is known for the recovery of energy from 5 flowing air. Likewise, there is a large selection of turbines designed to utilize the kinetic energy in flowing water, in particular in connection with power plants where there is a level difference between the reservoir and the turbine.
Windmills of the type used in large wind power plants generic- ate a lot of noise and are thought by many to spoil the landscape. Their reliability however, is satisfactory.
Document GB 2057584 concerns a wind turbine comprising an assemblage of a number of helical rotors. In one embodiment, the turbine blades are constructed with an approximate dar-
15 rieus shape comprising an aeroplane wing profile arranged at a distance from the axis of rotation of the turbine. WO 01/48374 describes a turbine where the aeroplane wing shaped principal turbine blades disposed at a distance from the axis of rotation of the turbine are provided with further aero-
20 plane wing shaped secondary turbine blades, and where the longitudinal axes of the secondary turbine blades assumes an angle relative to the longitudinal axis of the principal turbine blades .
It has proven difficult to recover kinetic energy from cur- rents in the sea and from wave motion. The reason may be the difficulties associated with dimensioning a plant to resist the large forces to which arrangements of this type are exposed, particularly during bad weather.
The object of the invention is to remedy the disadvantages of prior art.
The object is achieved in accordance with the invention, by the characteristics stated in the description below and in the following claims.
A relatively high efficiency is achieved by placing a screw turbine having a suitably shaped screw geometry, in a fluid flow.
A screw turbine is constituted by a screw profile wrapped around an axis, wherein the actual screw profile projects radially from the axis with a relatively small cross sectional thickness. The screw profile may have the same or a variable pitch along the axis.
If a fluid flow flows past a screw turbine at approximately the same angle relative to the central axis of the screw turbine as that of the screw pitch, the fluid flow will pass through the screw turbine essentially in parallel with the screw blade of the screw turbine on one side of the central axis, while the fluid flow on the opposite side of the central axis will impinge on the screw blade, where this blade portion presents a pressure face to the fluid flow. Thus the screw turbine is caused to rotate about its own axis.
According to the invention, the cross section of the blade is given a geometry similar to that of an aeroplane wing. Thus a cross section of the screw blade parallel to the direction of fluid flow will typically define a profile similar to that of an aeroplane wing, projecting from the central axis.
Most of the torque imparted to a screw turbine according to prior art results from fluid flowing against an area, a pres- sure face, which assumes an angle relative to the direction of flow, and which is located at a distance from the axis of rotation. With a screw turbine of the invention, where a part of the turbine blade is rotated towards an upstream position relative to the direction of flow, this part may be termed a flow face, torque is also produced by fluid flowing essentially parallel with the aeroplane wing-like profile, whereby a tangential force is imparted to the turbine blade, also before it assumes an angle against the direction of flow.
The pressure and flow faces are moved along the screw turbine during the rotation of the screw turbine. By using of this type of geometry, the efficiency of the screw blade is improved.
The screw turbine may be used at any orientation as long as the direction of fluid flow relative to the central axis of the screw turbine is substantially the same as the screw pitch.
In some applications, e.g. when submerged in water, the screw turbine may be provided with a rotatable mounting. In the case of such an application, the turbine construction may in- elude buoyancy elements that cause the turbine to assume an upward position, and where the current in the water rotates the axis of the turbine to a favourable position relative to the direction of flow. The turbine may also be used suspended from a corresponding suspension, e.g. underneath a moored raft.
The geometry of the turbine blade must be adjusted for among other things fluid viscosity and density for each application.
The shaft of the screw turbine may, in a manner that is known per se, be connected to a generator for generation of elec- trical power or to another device that requires energy, e.g. a pump.
The following describes a non-limiting example of a preferred embodiment illustrated in the accompanying drawings, in which:
Figure 1 schematically shows a screw turbine seen from the upstream face of the fluid;
Figure 2 schematically shows an example embodiment in which the screw turbine is mounted in a fluid flow;
Figure 3 shows a section II-II in figure 2; and
Figure 4 schematically shows an example embodiment in which the screw turbine is rotatably mounted under water.
In the drawings, reference number 1 denotes a screw turbine comprising a shaft 2, the shaft 2 being rotatably supported in bearings 3, and a helical turbine blade 4. Figure 1 shows the screw turbine 1 from the direction of inflow of the fluid flowing through/past the screw turbine 1. In order to achieve a satisfactory efficiency, the direction of flow relative to the central axis 6 of the screw turbine 1 must be approximately equal to the pitch angle 8 of the turbine blade 4, see figure 2. The flowing fluid passes, with reference to figure 1, on the underside of the central axis 6, through the openings 10 between the parts of the turbine blade 4 positioned in the downward direction, indicated by reference number 12 in figure 1.
The portion 14 of the turbine blade projecting upwards from the central axis 6 constitutes an obstruction to flow, and hence is subjected to a pressure force from the flowing fluid when the fluid impinges on the blade portion 14. Thus the screw turbine is caused to rotate about its own central axis 6.
The shape of the cross sectional geometry of the turbine blade 4 has proven to have a significant effect on the hydraulic efficiency of the turbine 1. The highest efficiency is achieved when the cross section of the turbine blade 4 along the direction of flow is constructed with a cross sectional profile 15 like that of an aeroplane wing, see figure 2.
The flowing fluid that encounters the turbine blade 4 at the upstream edge 16 of the turbine blade 4 is split, and the fluid flowing along the top surface of the cross sectional profile 15 must, in a manner that is known per se, increase its velocity, whereby the static pressure falls, resulting in a pressure difference between the top surface and the lower surface of the cross sectional profile 15. The pressure difference causes the blade portions of the turbine blade 4 projecting in the upstream direction relative to the direction of fluid flow to be subjected to a lift force that results in additional torque about the axis 2.
In figure 2 the screw turbine 1 is mounted in a flow of water. The shaft 2 of the screw turbine 1 is supported by bear- ings 3 at both ends and is connected to a generator 18. The bearings 3 are coupled to a structure 17. The water flowing against the screw turbine 1 causes this to rotate, whereby the generator 18 may produce electric energy. The direction of flow is indicated by arrows in figure 2.
In a further embodiment, see figure 4, the screw turbine 1 is disposed under water. The shaft 2 of the screw turbine 1 is connected to a generator 18 via bearings 3. The screw turbine 1 and the generator 18 are rotatably connected to a foundation 20 on the seabed 22. In this example embodiment, the turbine blade 4 is constructed so as to have sufficient buoyancy. The buoyancy force causes the screw turbine 1 to be raised towards a vertical position, while the force from the flowing fluid rotates the screw turbine 1 in the direction of flow until the screw turbine 1 assumes a favourable orienta- tion relative to the direction of fluid flow. The direction of flow is indicated by arrows in figure 4.
In other embodiments , the screw turbine may be mounted in a suspended manner from an appropriate fixture or form part of a bank of turbines .

Claims

C l a i s
1. A screw turbine device (1) comprising at least one helical blade (4) that is rotatable about an axis (6) , the cross section of the blade (4) being constructed in the shape of the profile (15) of an aeroplane wing, c h a r a c t e r i z e d i n that the aeroplane wing-like profile (15) projects from the outer radial end of the blade (4) and in to the shaft (2) of the screw turbine (1) .
2. A device in accordance with Claim 1, c h a r a c - t e r i z e d i n that the axis (6) of the screw turbine (1) assumes an angle relative to the flowing fluid, which essentially corresponds to the pitch angle (8) of the screw turbine (1) .
3. A device in accordance with Claim 1, c h a r a c - t e r i z e d i n that the screw turbine (1) is rotatably connected to a suspension (20, 22) about an axis that does not coincide with the central axis (6) of the screw turbine (1) .
4. A device in accordance with one or more of the preceding claims, c h a r a c t e r i z e d i n that the pitch of the blade (4) varies along the central axis (6) .
PCT/NO2004/000026 2003-01-30 2004-01-28 A screw turbine device WO2004067957A1 (en)

Priority Applications (6)

Application Number Priority Date Filing Date Title
JP2006502759A JP2006516698A (en) 2003-01-30 2004-01-28 Screw turbine equipment
EP04705967A EP1592885A1 (en) 2003-01-30 2004-01-28 A screw turbine device
US10/543,255 US20060257241A1 (en) 2003-01-30 2004-01-28 Screw turbine device
CA002514965A CA2514965A1 (en) 2003-01-30 2004-01-28 A screw turbine device
EA200501124A EA007080B1 (en) 2003-01-30 2004-01-28 A screw turbine device
AU2004208073A AU2004208073A1 (en) 2003-01-30 2004-01-28 A screw turbine device

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
NO20030464A NO20030464L (en) 2003-01-30 2003-01-30 Screw turbine device.
NO20030464 2003-01-30

Publications (1)

Publication Number Publication Date
WO2004067957A1 true WO2004067957A1 (en) 2004-08-12

Family

ID=19914432

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/NO2004/000026 WO2004067957A1 (en) 2003-01-30 2004-01-28 A screw turbine device

Country Status (11)

Country Link
US (1) US20060257241A1 (en)
EP (1) EP1592885A1 (en)
JP (1) JP2006516698A (en)
KR (1) KR20050103477A (en)
CN (1) CN1745246A (en)
AU (1) AU2004208073A1 (en)
CA (1) CA2514965A1 (en)
EA (1) EA007080B1 (en)
NO (1) NO20030464L (en)
OA (1) OA13096A (en)
WO (1) WO2004067957A1 (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2006123924A1 (en) * 2005-05-19 2006-11-23 Mihail Poleacov Method and device for a steam vortex transformation
EP2245302A1 (en) * 2008-01-24 2010-11-03 Flumill AS Turbine arrangement
WO2013006061A1 (en) 2011-07-04 2013-01-10 Flumill As Arrangement for extracting energy from flowing liquid
WO2015140209A1 (en) * 2014-03-21 2015-09-24 Flumill As Hydrokinetic energy conversion system and use thereof
US11008998B2 (en) 2016-10-27 2021-05-18 Upravljanje Kaoticnim Sustavima d.o.o. Floating screw turbines device

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* Cited by examiner, † Cited by third party
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US8251662B2 (en) * 2007-01-22 2012-08-28 Parker Daniel B Wind turbine blade assembly and apparatus
DE102007032582B4 (en) * 2007-07-09 2009-09-10 Woronowicz, Ulrich, Dr. Series compressed air propulsion system and system for storing and recovering energy
JP5346000B2 (en) * 2009-04-06 2013-11-20 勇 松田 Windmill
AP3695A (en) * 2010-08-11 2016-05-31 Jupiter Hydro Inc System and method for generating electrical power from a flowing current of fluid
US8487468B2 (en) * 2010-11-12 2013-07-16 Verterra Energy Inc. Turbine system and method
RU2461733C9 (en) * 2011-06-01 2019-04-05 Открытое акционерное общество "ВНИИГ им. Б.Е. Веденеева" Wind-driven unit
CN103485974A (en) * 2013-02-22 2014-01-01 姚登祥 Novel wind power generator device used for vehicles
CN104074684B (en) * 2014-07-14 2016-08-17 中国矿业大学 A kind of sloping shaft double helical form wind and rain TRT
CN106368896A (en) * 2015-10-23 2017-02-01 田永胜 Nautilus equiangular spiral wind wheel electric generator
EP3508717A4 (en) * 2016-08-09 2020-04-15 Manuel Muñoz Saiz System for capturing the energy of fluid currents
JP6247731B2 (en) * 2016-10-28 2017-12-13 フルミル アクティーゼルスカブ A device for extracting energy from a flowing liquid
US11542911B2 (en) * 2021-03-19 2023-01-03 Theodore Dolenc Apparatus for converting the energy of ocean waves
KR102479445B1 (en) * 2021-03-26 2022-12-22 정민시 Screw Generator with Variable Free End

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Publication number Priority date Publication date Assignee Title
GB2057584A (en) * 1979-08-30 1981-04-01 Burgdorf H Wind motor
JPS6090992A (en) * 1983-10-26 1985-05-22 Hitachi Ltd Spiral blade type vertical shaft windmill

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1371836A (en) * 1919-10-21 1921-03-15 Antz Eugene Current-motor
US5642984A (en) * 1994-01-11 1997-07-01 Northeastern University Helical turbine assembly operable under multidirectional fluid flow for power and propulsion systems

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2057584A (en) * 1979-08-30 1981-04-01 Burgdorf H Wind motor
JPS6090992A (en) * 1983-10-26 1985-05-22 Hitachi Ltd Spiral blade type vertical shaft windmill

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2006123924A1 (en) * 2005-05-19 2006-11-23 Mihail Poleacov Method and device for a steam vortex transformation
EP2245302A1 (en) * 2008-01-24 2010-11-03 Flumill AS Turbine arrangement
EP2245302A4 (en) * 2008-01-24 2013-03-13 Flumill As Turbine arrangement
WO2013006061A1 (en) 2011-07-04 2013-01-10 Flumill As Arrangement for extracting energy from flowing liquid
US8961131B2 (en) 2011-07-04 2015-02-24 Flumill As Arrangement for extracting energy from flowing liquid
AU2011372330B2 (en) * 2011-07-04 2016-10-13 Flumill As Arrangement for extracting energy from flowing liquid
WO2015140209A1 (en) * 2014-03-21 2015-09-24 Flumill As Hydrokinetic energy conversion system and use thereof
US10378505B2 (en) 2014-03-21 2019-08-13 Flumill As Hydrokinetic energy conversion system and use thereof
US11008998B2 (en) 2016-10-27 2021-05-18 Upravljanje Kaoticnim Sustavima d.o.o. Floating screw turbines device

Also Published As

Publication number Publication date
AU2004208073A1 (en) 2004-08-12
US20060257241A1 (en) 2006-11-16
EA200501124A1 (en) 2006-02-24
KR20050103477A (en) 2005-10-31
CA2514965A1 (en) 2004-08-12
JP2006516698A (en) 2006-07-06
OA13096A (en) 2006-11-10
NO20030464D0 (en) 2003-01-30
NO20030464L (en) 2004-08-02
EP1592885A1 (en) 2005-11-09
CN1745246A (en) 2006-03-08
EA007080B1 (en) 2006-06-30

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