CA2489946C - Water flow turbine - Google Patents
Water flow turbine Download PDFInfo
- Publication number
- CA2489946C CA2489946C CA002489946A CA2489946A CA2489946C CA 2489946 C CA2489946 C CA 2489946C CA 002489946 A CA002489946 A CA 002489946A CA 2489946 A CA2489946 A CA 2489946A CA 2489946 C CA2489946 C CA 2489946C
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- CA
- Canada
- Prior art keywords
- water flow
- rotor
- inlet
- water
- flow turbine
- Prior art date
- Legal status (The legal status 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 status listed.)
- Expired - Fee Related
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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
- F03B17/063—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 the flow engaging parts having no movement relative to the rotor during its rotation
-
- 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
- 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
- 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
- F05B2240/90—Mounting on supporting structures or systems
- F05B2240/97—Mounting on supporting structures or systems on a submerged structure
-
- 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
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B10/00—Integration of renewable energy sources in buildings
- Y02B10/30—Wind power
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Oceanography (AREA)
- Other Liquid Machine Or Engine Such As Wave Power Use (AREA)
Abstract
In a device to generate power from flowing water, the water flows inside the host body (6) of the turbine and rotates the rotor (2), which rotates an electrical generator (10) to produce electricity. The Water Flow Turbine converts the kinetic energy in the flowing water into electrical energy. A mathematical derivation shows that power can be magnified by funnelling. This magnification of the power is proportional to the square of the ratio of the inlet area (1L or 1R) of the host body (6) to the area of the rotor (2) projected area. This magnification of power implies smaller size rotors, which reduce the cost and mechanical problems associated with rotation. Flow director (7) is used to direct the flow when reverses, instead of directing the whole underwater turbine. This device belongs to tidal power, and can work either for unidirectional flow or oscillatory flows.
Description
Applic. No.: 2,489,946 Water Flow Turbine Owner: Mina, Kameal Description This device is called "Water Flow Turbine (WFT)" or "Underwater Turbine (UT)", as it will be completely submerged in the flowing stream of water, except for the electrical part. The purpose of the Water Flow Turbine is to generate power by converting the kinetic energy in the flowing water into electrical energy. This device belongs to power generation that is based on renewable sources of energy, specifically from tidal currents.
Many of the existing underwater turbines (also known as marine current turbines) do not use funnelling system to magnify the flow power. Some of them require a 180 rotation to face the flow when reverses its direction. Huge, complicated and expensive systems were developed earlier. Some of earlier systems utilize the potential energy of the tide, which is irregular and unsteady in nature. The kinetic energy contained in the tide is believed to be more steady and reliable (the tidal wave period is approximately 12 hours in the Atlantic, for example). Other systems use the fluctuating water level to compress air, which spins turbine rotors. It is understood that compressed air loses energy in the form of thermal energy, due to its compressibility. The idea of generating electricity from the flowing water is described as follows:
1. Flowing water is accelerated through inlet (1L) or inlet (1R) in the host body (6) of the turbine, as in fig. 1.
Many of the existing underwater turbines (also known as marine current turbines) do not use funnelling system to magnify the flow power. Some of them require a 180 rotation to face the flow when reverses its direction. Huge, complicated and expensive systems were developed earlier. Some of earlier systems utilize the potential energy of the tide, which is irregular and unsteady in nature. The kinetic energy contained in the tide is believed to be more steady and reliable (the tidal wave period is approximately 12 hours in the Atlantic, for example). Other systems use the fluctuating water level to compress air, which spins turbine rotors. It is understood that compressed air loses energy in the form of thermal energy, due to its compressibility. The idea of generating electricity from the flowing water is described as follows:
1. Flowing water is accelerated through inlet (1L) or inlet (1R) in the host body (6) of the turbine, as in fig. 1.
2. The accelerated water flow rotates the turbine rotor blades (2) in fig. 1.
3. The vertical shaft (4) rotates the mechanical transmission means (9), which speeds up the rotational speed of the rotor (2), as in fig. 1.
4. The power is finally transmitted from the mechanical transmission means (9) to the generator (10) at the designed RPM (Rotation Per Minute) and torque.
The following mathematical analysis shows, quantitatively, how funnelling can be implemented to magnify the available power in the flow. Consider the water flow to be onshore directed, from the left to the right (imagine the shoreline or the beach is to the right of the Water Flow Turbine), as indicated in figure 1. The power available in the flowing water at inlet (1L) is:
Signature:
Applic. No.: 2,489,946 Water Flow Turbine Owner: Mina, Kameal P, = 2 pV,3A, (1) Where p is the water density, V, is the water velocity at section (lL) and A, is the cross section area at (1L). Now the power available in the flow at the rotor (2) is:
P2 = 1 2 pV2 A2 (2) Where V2 is the water velocity before hitting the rotor (2), and A2 is the rotor projected area. The continuity equation states (considering the water to be incompressible and the flow is steady):
V,A, = V2A2 (3) Substitute for lz =V, ' (4) In equation (2):
P2 = 2 pVi3 ' A2 ~ pV 3 Ai ] ' = P A,) (S) 2 z 2 Which means magnification of the power available at cross section (1L), by the amount AI
A at cross section (2), the rotor cross section. This implies smaller size rotors, which means lower cost and less mechanical problems associated with moving parts.
Signature:
~(, 'J-'- ,"
~~
Applic. No.: 2,489,946 Water Flow Turbine Owner: Mina, Kameal The final power delivered from the generator will be the multiplication of all efficiencies (mechanical and electrical) and of the power coefficient of the rotor. The final power delivered from the generator will be:
PG = qm'7eCPP2 (6) Where PG is the final power delivered by the generator, r7m is the mechanical efficiency, r7e is the electrical efficiency and C. is the power coefficient of the rotor.
As a numerical example, assume the incoming water speed is V, = 2m / s, and the area of cross section (1L) is A, = 2m2. If the rotor (2) projected area is A2 =1m2 and the water density is p=1000kg / m3 , then the following can be calculated:
P, = 2 pV,3 A, = 2(1000X2)3 (2) = 8000watts V2 =V, Al =2 1 =4mis P2 = ~ pVZ A2 = 2 (1 00OX4)3 (1) = 32000watts P2 = 4 x 8000watts = 4P, = P, A, (A2 Assuming mechanical efficiency of qm = 85% = 0.85, electrical efficiency of 77e = 96% = 0.96, and a rotor power coefficient of CP = 0.3, then the final power delivered by the generator is:
PG = rlmz7eCPP2 = (0.85X0.96X0.3X32000) = 7833.6watts ~
Signature:
AI-1/1PI, c t"~I
Applic. No.: 2,489,946 Water Flow Turbine Owner: Mina, Kameal For an area ratio of ' = 3, the power is magnified by the factor ' =(3)z = 9, which 2 z means an available power of P2 = 9 x 8000watts = 72000watts at the rotor. If the same efficiencies are used; 77= 0.85, qe = 0.96, and C p= 0.3, then the final generator power is:
PG= i7,nqeCPPz = (0.85X0.96X0.3X72000) =17625.6watts The problem of the change of the flow direction is solved by the flow director (7). The flow director (7) rotates about an axis that is perpendicular to the rotor shaft (4). The axis of rotation of the flow director (7) is also perpendicular to the direction of the flowing water current. If the flow reverses its direction to be offshore directed, i.e. from the right to the left in figure 1, the flow director (7) will lean to the left due to the flow pressure in this direction and gate (8L) will open and gate (8R) will close, also due to the flow pressure acting to the left. Gates (8L) and (8R) have pivots, which are perpendicular to the shaft (4) and to the flow direction, but parallel to the axis of rotation of the flow director (7). Therefore, the problem of flow reversal from onshore to offshore or vice versa is solved in the present design.
The host body (6) can be provided with a low current, low voltage circuit to dismiss sea creatures and prevent them from sticking to the host body (6). The host body can be constructed of a type of concrete that can resist salty water. The rotor (2) should also be constructed form the same type of concrete used for the host body (6). The rotor blades (2) should also be covered with a ceramic layer to provide a smooth and strong surface. The number of blades of the rotor (2) can be 2, 3, 4, or any suitable number for the design under consideration. The rotor rotational speed can also vary and might be low or high, depending on the design under consideration. The rotor (2) should be propeller type, similar to those used in horizontal axis wind turbines.
The shaft (4) should be supported by magnetic bearings (5), in order to reduce the frictional losses with the shaft (4). The generator (10) can be DC (Direct current) or AC
(Alternating Current). DC generators can be used to electrolyse water into Hydrogen, which can be stored and transported, and burnt under control in larger power stations. The generator (10) can be Signature:
y ~~ / V
Applic. No.: 2,489,946 Water Flow Turbine Owner: Mina, Kameal doubly fed induction motor. The mechanical transmission means (9) can have any suitable set-up ratio for the design under consideration.
The generator (10) and a control gear can be contained within the system of the Water Flow Turbine and include protection for faults that could be expected in systems of this nature, where input energy is variable with time.
Inlets (1L) and (1R) should be covered with nets to filter the incoming water flow from suspended material. Openings (3L) and (3R) should also be covered with nets to prevent any objects from entering the host body (6).
Signature:
Applic. No.: 2,489,946 Water Flow Turbine Owner: Mina, Kameal Brief Description of the Drawings Figure 1 is a side view of the water flow turbine. The whole body should be completely submerged in the flowing water, except for the electrical parts, which should be well isolated from any source of water or snow.
The water is assumed to be flowing from left to right (represented by the velocity V of the water in figure 1). The water is accelerated through section (1L) until it reaches the rotor (2).
The rotor (2) is fixed to the lower end of the shaft (4). The shaft (4) is supported by bearings (5), which could be magnetic bearings. When the rotor (2) is rotated by the flow, the shaft (4) will rotate as well at the same rotational speed (RPM). The shaft (4) is connected at its upper end to a mechanical transmission means (9), which speeds up the rotational speed of the rotor-shaft combination to the designed rotational speed of the generator (10). The generator (10) is directly connected to the mechanical transmission means (9).
After some of the flow energy is delivered to the rotor (2), the flow continues through opening (3R) and pushes gate (8R) to leave the host body (6) of the water flow turbine. If the flow reverses its direction, the flow director (7) will lean to the left and will cause the flow to pass from the left inlet at (1R) then by the rotor (2), then pushing gate (8L) to leave the host body (6) from opening (3L).
The host body (6) is to be constructed from concrete that can resist salty water. The rotor blades (2) can be made of the same type of concrete and can be coated with ceramic, which cannot be corroded by the salty water and has a very smooth surface, to decrease frictional losses.
No need for special digging under the seabed to fix certain foundations (which cost too much money) for these types of underwater turbines. The Water Flow Turbine can simply be laid on the seafloor.
Drawings are shown separately in the last page. Notations used in figure 1 are described in the following:
Fi ug re 1:
1L: Left inlet 1R: Right inlet Signature:
Applic. No.: 2,489,946 Water Flow Turbine Owner: Mina, Kameal 2: Rotor (consists of a plurality of blades) 3L: Left opening up 3R: Right opening up 4: Vertical shaft of the rotor 5: Magnetic bearing 6: Host body of the turbine 7: Flow director 8L: Left gate 8R: Right gate 9: mechanical transmission means 10: Generator (DC or AC) Signature:
The following mathematical analysis shows, quantitatively, how funnelling can be implemented to magnify the available power in the flow. Consider the water flow to be onshore directed, from the left to the right (imagine the shoreline or the beach is to the right of the Water Flow Turbine), as indicated in figure 1. The power available in the flowing water at inlet (1L) is:
Signature:
Applic. No.: 2,489,946 Water Flow Turbine Owner: Mina, Kameal P, = 2 pV,3A, (1) Where p is the water density, V, is the water velocity at section (lL) and A, is the cross section area at (1L). Now the power available in the flow at the rotor (2) is:
P2 = 1 2 pV2 A2 (2) Where V2 is the water velocity before hitting the rotor (2), and A2 is the rotor projected area. The continuity equation states (considering the water to be incompressible and the flow is steady):
V,A, = V2A2 (3) Substitute for lz =V, ' (4) In equation (2):
P2 = 2 pVi3 ' A2 ~ pV 3 Ai ] ' = P A,) (S) 2 z 2 Which means magnification of the power available at cross section (1L), by the amount AI
A at cross section (2), the rotor cross section. This implies smaller size rotors, which means lower cost and less mechanical problems associated with moving parts.
Signature:
~(, 'J-'- ,"
~~
Applic. No.: 2,489,946 Water Flow Turbine Owner: Mina, Kameal The final power delivered from the generator will be the multiplication of all efficiencies (mechanical and electrical) and of the power coefficient of the rotor. The final power delivered from the generator will be:
PG = qm'7eCPP2 (6) Where PG is the final power delivered by the generator, r7m is the mechanical efficiency, r7e is the electrical efficiency and C. is the power coefficient of the rotor.
As a numerical example, assume the incoming water speed is V, = 2m / s, and the area of cross section (1L) is A, = 2m2. If the rotor (2) projected area is A2 =1m2 and the water density is p=1000kg / m3 , then the following can be calculated:
P, = 2 pV,3 A, = 2(1000X2)3 (2) = 8000watts V2 =V, Al =2 1 =4mis P2 = ~ pVZ A2 = 2 (1 00OX4)3 (1) = 32000watts P2 = 4 x 8000watts = 4P, = P, A, (A2 Assuming mechanical efficiency of qm = 85% = 0.85, electrical efficiency of 77e = 96% = 0.96, and a rotor power coefficient of CP = 0.3, then the final power delivered by the generator is:
PG = rlmz7eCPP2 = (0.85X0.96X0.3X32000) = 7833.6watts ~
Signature:
AI-1/1PI, c t"~I
Applic. No.: 2,489,946 Water Flow Turbine Owner: Mina, Kameal For an area ratio of ' = 3, the power is magnified by the factor ' =(3)z = 9, which 2 z means an available power of P2 = 9 x 8000watts = 72000watts at the rotor. If the same efficiencies are used; 77= 0.85, qe = 0.96, and C p= 0.3, then the final generator power is:
PG= i7,nqeCPPz = (0.85X0.96X0.3X72000) =17625.6watts The problem of the change of the flow direction is solved by the flow director (7). The flow director (7) rotates about an axis that is perpendicular to the rotor shaft (4). The axis of rotation of the flow director (7) is also perpendicular to the direction of the flowing water current. If the flow reverses its direction to be offshore directed, i.e. from the right to the left in figure 1, the flow director (7) will lean to the left due to the flow pressure in this direction and gate (8L) will open and gate (8R) will close, also due to the flow pressure acting to the left. Gates (8L) and (8R) have pivots, which are perpendicular to the shaft (4) and to the flow direction, but parallel to the axis of rotation of the flow director (7). Therefore, the problem of flow reversal from onshore to offshore or vice versa is solved in the present design.
The host body (6) can be provided with a low current, low voltage circuit to dismiss sea creatures and prevent them from sticking to the host body (6). The host body can be constructed of a type of concrete that can resist salty water. The rotor (2) should also be constructed form the same type of concrete used for the host body (6). The rotor blades (2) should also be covered with a ceramic layer to provide a smooth and strong surface. The number of blades of the rotor (2) can be 2, 3, 4, or any suitable number for the design under consideration. The rotor rotational speed can also vary and might be low or high, depending on the design under consideration. The rotor (2) should be propeller type, similar to those used in horizontal axis wind turbines.
The shaft (4) should be supported by magnetic bearings (5), in order to reduce the frictional losses with the shaft (4). The generator (10) can be DC (Direct current) or AC
(Alternating Current). DC generators can be used to electrolyse water into Hydrogen, which can be stored and transported, and burnt under control in larger power stations. The generator (10) can be Signature:
y ~~ / V
Applic. No.: 2,489,946 Water Flow Turbine Owner: Mina, Kameal doubly fed induction motor. The mechanical transmission means (9) can have any suitable set-up ratio for the design under consideration.
The generator (10) and a control gear can be contained within the system of the Water Flow Turbine and include protection for faults that could be expected in systems of this nature, where input energy is variable with time.
Inlets (1L) and (1R) should be covered with nets to filter the incoming water flow from suspended material. Openings (3L) and (3R) should also be covered with nets to prevent any objects from entering the host body (6).
Signature:
Applic. No.: 2,489,946 Water Flow Turbine Owner: Mina, Kameal Brief Description of the Drawings Figure 1 is a side view of the water flow turbine. The whole body should be completely submerged in the flowing water, except for the electrical parts, which should be well isolated from any source of water or snow.
The water is assumed to be flowing from left to right (represented by the velocity V of the water in figure 1). The water is accelerated through section (1L) until it reaches the rotor (2).
The rotor (2) is fixed to the lower end of the shaft (4). The shaft (4) is supported by bearings (5), which could be magnetic bearings. When the rotor (2) is rotated by the flow, the shaft (4) will rotate as well at the same rotational speed (RPM). The shaft (4) is connected at its upper end to a mechanical transmission means (9), which speeds up the rotational speed of the rotor-shaft combination to the designed rotational speed of the generator (10). The generator (10) is directly connected to the mechanical transmission means (9).
After some of the flow energy is delivered to the rotor (2), the flow continues through opening (3R) and pushes gate (8R) to leave the host body (6) of the water flow turbine. If the flow reverses its direction, the flow director (7) will lean to the left and will cause the flow to pass from the left inlet at (1R) then by the rotor (2), then pushing gate (8L) to leave the host body (6) from opening (3L).
The host body (6) is to be constructed from concrete that can resist salty water. The rotor blades (2) can be made of the same type of concrete and can be coated with ceramic, which cannot be corroded by the salty water and has a very smooth surface, to decrease frictional losses.
No need for special digging under the seabed to fix certain foundations (which cost too much money) for these types of underwater turbines. The Water Flow Turbine can simply be laid on the seafloor.
Drawings are shown separately in the last page. Notations used in figure 1 are described in the following:
Fi ug re 1:
1L: Left inlet 1R: Right inlet Signature:
Applic. No.: 2,489,946 Water Flow Turbine Owner: Mina, Kameal 2: Rotor (consists of a plurality of blades) 3L: Left opening up 3R: Right opening up 4: Vertical shaft of the rotor 5: Magnetic bearing 6: Host body of the turbine 7: Flow director 8L: Left gate 8R: Right gate 9: mechanical transmission means 10: Generator (DC or AC) Signature:
Claims (11)
1. A stand-alone, self-contained, transportable, water flow turbine, comprising a host body, a first inlet and a second inlet, the first inlet and the second inlet located opposite to each other on each side of a rotor, where the water current flows through the first inlet or the second inlet and accelerates toward the rotor, said rotor rotates in a horizontal plane, said rotor is fixed to a lower end of a vertical shaft, said shaft is supported by bearings, said shaft has an upper end that is connected to a mechanical transmission means, said mechanical transmission means is connected to a generator, a flow director directs the flow upward toward said rotor, whether the flow comes through the first inlet or the second inlet, said flow director has an axis of rotation that is perpendicular to the axis of said shaft, said flow director directs the flow upward, towards said rotor, whether the flow comes from the first inlet or the second inlet, after delivering some of its kinetic energy to said rotor, the water current flows through a first opening or a second opening, the first opening and the second opening located opposite to each other on either side of the rotor in said host body, the water flow leaves said host body by pushing a first gate or a second gate, the first gate opens and closes the first opening and the second gate opens and closes the second opening, according to the direction of the water flow, said water flow turbine contains a generator control gear and a protection equipment against sea creatures.
2. Said water flow turbine as claimed in claim 1, wherein the water flow turbine is laid on the seafloor.
3. Said water flow turbine as claimed in claim 1 or claim 2, wherein the water flow turbine operates at low current speeds of about 2m/s.
4. Said water flow turbine as claimed in any one of claims 1 to 3, wherein said host body is constructed in a way that enables funnelling of the water flow as the water flow proceeds from said first inlet or second inlet toward said rotor.
5. Said water flow turbine as claimed in any one of claims 1 to 4, wherein said host body is constructed of a type of material that resists the corrosive effects of salty water.
6. Said water flow turbine as claimed in any one of claims 1 to 5, wherein said protection equipment comprises nets that cover the first inlet and the second inlet to filter the water flow.
7. Said water flow turbine as claimed in any one of claims 1 to 6, wherein said protection equipment comprises nets covering said first opening and said second opening to prevent objects from entering said first opening and said second opening.
8. Said water flow turbine as claimed in any one of claims 1 to 7, wherein said rotor is made of a type of material that resists the corrosive effects of salty water, and wherein said rotor is covered with a ceramic layer.
9. Said water flow turbine as claimed in any one of claims 1 to 8, wherein said rotor is a propeller type rotor.
10. Said water flow turbine as claimed in any one of claims 1 to 9, wherein said bearings are magnetic bearings.
11. Said water flow turbine as claimed in any one of claims 1 to 10, wherein said generator delivers DC or AC electrical power.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA002489946A CA2489946C (en) | 2005-01-05 | 2005-01-05 | Water flow turbine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA002489946A CA2489946C (en) | 2005-01-05 | 2005-01-05 | Water flow turbine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CA2489946A1 CA2489946A1 (en) | 2006-07-05 |
| CA2489946C true CA2489946C (en) | 2008-08-19 |
Family
ID=36646235
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002489946A Expired - Fee Related CA2489946C (en) | 2005-01-05 | 2005-01-05 | Water flow turbine |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA2489946C (en) |
Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2461983B (en) * | 2008-07-23 | 2012-12-26 | Harold Birkett | Versatile water powered generator |
| US8506244B2 (en) | 2010-09-29 | 2013-08-13 | George F. MCBRIDE | Instream hydro power generator |
| CN104033322A (en) * | 2013-03-08 | 2014-09-10 | 杭州林黄丁新能源研究院有限公司 | Horizontal type generator device |
| GB2515577A (en) * | 2013-06-29 | 2014-12-31 | Angus Black | A combined floating renewable energy platform with new designs for wind and water energy recovery, also supporting solar power |
| CN103758686B (en) * | 2013-12-26 | 2016-01-20 | 宁波大学 | A kind of combined power generation device |
| CN104806435A (en) * | 2015-05-05 | 2015-07-29 | 河海大学 | Vertical axis wave energy power generation device |
| CN105332849B (en) * | 2015-11-23 | 2017-12-08 | 广州航海学院 | A kind of binary channels promotes turbine generator in the same direction |
| CN106321338A (en) * | 2016-11-22 | 2017-01-11 | 淮北智淮科技有限公司 | Floating wave power generation device |
| CN109162861A (en) * | 2018-10-17 | 2019-01-08 | 山东大学 | A kind of floatation type vertical axis wave-energy power generation equipment and its application |
-
2005
- 2005-01-05 CA CA002489946A patent/CA2489946C/en not_active Expired - Fee Related
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| Publication number | Publication date |
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| CA2489946A1 (en) | 2006-07-05 |
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