IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0993645
(2009-04-14)
|
등록번호 |
US-8633609
(2014-01-21)
|
우선권정보 |
AU-2008901833 (2008-04-14) |
국제출원번호 |
PCT/AU2009/000457
(2009-04-14)
|
§371/§102 date |
20110601
(20110601)
|
국제공개번호 |
WO2009/126995
(2009-10-22)
|
발명자
/ 주소 |
- Cornelius, Tim
- Campbell, Gary
- Keir, John
- Blaxland, Drew
- Pielach, Peter
|
출원인 / 주소 |
- Atlantis Resources Corporation PTE Limited
|
인용정보 |
피인용 횟수 :
3 인용 특허 :
46 |
초록
▼
A central axis water turbine is described which comprises a turbine body having a central axis; a rotor mounted on the turbine body for rotation about the central axis, the rotor comprising a central hub supporting a plurality of blades, each blade extending from a blade root mounted on the hub to a
A central axis water turbine is described which comprises a turbine body having a central axis; a rotor mounted on the turbine body for rotation about the central axis, the rotor comprising a central hub supporting a plurality of blades, each blade extending from a blade root mounted on the hub to a blade tip; a generator driven by the rotor; and a housing surrounding the rotor and adapted to direct water flow towards the rotor, the housing converging from a front opening forward of the rotor to a narrower throat adjacent the turbine body; wherein the blades are splayed rearward from the blade root to the blade tip by a tilt angle of 1° to 20° from a plane perpendicular to the central axis.
대표청구항
▼
1. An apparatus for generating electricity from a natural water current in a body of water, the apparatus comprising: a turbine body having a central axis, the turbine body configured to be disposed in the body of water;a rotor mounted on the turbine body for rotation about the central axis, the rot
1. An apparatus for generating electricity from a natural water current in a body of water, the apparatus comprising: a turbine body having a central axis, the turbine body configured to be disposed in the body of water;a rotor mounted on the turbine body for rotation about the central axis, the rotor including a central hub supporting a plurality of blades, each blade of the plurality of blades extending from a blade root mounted on the hub to a blade tip, the rotor configured to be rotated by the natural water current within the body of water, the natural water current flowing parallel to a surface of the body of water;a generator driven by the rotor, the generator configured to generate electricity; anda cowling, an internal wall of the cowling surrounding the rotor, the cowling configured to direct the natural water current towards the plurality of blades, the cowling defining a flow channel having a flow restriction, the flow restriction forming a convergent-divergent venturi, tapering from a first opening at a first end of the flow channel and a second opening at a second end of the flow channel towards an inner part of the flow channel;a plurality of support struts configured to support the generator in a central position within the flow channel, each support strut from the plurality of support struts extending tangentially outward from the generator to the internal wall of the cowling, the plurality of support struts being located directly downstream of the plurality of blades, the generator being located directly downstream of the plurality of support struts, each support strut from the plurality of support struts defining a hollow duct within which at least one of an electrical line or a hydraulic line can be disposed; anda ballasted foot configured to be located on a floor of the body of water, the ballasted foot including a plurality of equally-spaced platform members and a vertical pylori, the vertical pylori disposed between the cowling and the ballasted foot and configured to support the cowling in the natural water current,wherein each blade root of the plurality of blades includes a plug coupled thereto and configured to reduce interference to water flow, each blade tip of the plurality of blades is disposed adjacent to, but not contacting, the internal wall of the inner part of the flow channel, and each blade of the plurality of blades is raked in a downstream direction from the blade root to the blade tip by a downstream rake angle of 1° to 20° from a vertical plane, the vertical plane perpendicular to the central axis. 2. The apparatus according to claim 1, wherein the cowling extends upstream of the plurality of blades a selected distance to facilitate direction of water flow towards the plurality of blades. 3. The apparatus according to claim 1, wherein the rake angle is from 4° to 6°. 4. The apparatus according to claim 3, wherein the rake angle is about 5°. 5. The apparatus according to claim 1, wherein the plurality of blades includes at least 3 blades. 6. The apparatus according to claim 1, further comprising a nose cone mounted on the rotor. 7. The apparatus according to claim 1, further comprising a variable speed drive. 8. The apparatus according to claim 1, wherein the cowling includes a plurality of cowling portions, the plurality of cowling portions fastened together when the cowling is assembled. 9. A method of generating electricity from natural marine water currents, the method comprising: providing an apparatus according to claim 1 in a marine environment;the rotor configured to be rotated by the natural water current, the rotation of the rotor driving the generator to generate electrical power; anddrawing electrical power from the generator. 10. The apparatus of claim 1, wherein a hydrostatic pressure at an entrance of the cowling is approximately equal to a hydrostatic pressure at an exit of the cowling. 11. The apparatus of claim 1, wherein the cowling is constructed from a reinforced plastic. 12. The apparatus of claim 1 wherein the natural water current is at least one of a tidal current or a marine sub-sea water current. 13. The apparatus of claim 1 wherein the cowling is configured to maintain a direction of the natural water current parallel with the surface of the body of water.
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