The duct 40 may be a cylinder of constant or converging internal diameter, or, optionally, the interior walls may diverge in order to increase the mass flow of water flowing through the duct 40. Additionally, the duct 40 includes an opening at the intake end or inlet 42 and an opening at the outflow end 20 or outlet 44. In a particular embodiment the inlet 42 is circular in an elevation view and the outlet 44 is oblong, in order to minimize the height profile of the turbine 10 in potentially relatively shallow sites, or sites with navigational clearance restrictions (such as rivers or seaways for example) while maximizing flow, turbine blade diameter and therefore power output. In an optional embodiment, the interior walls of the hub 20 may converge in order to increase the velocity of water flowing through the longitudinal hole in a venturi effect. The central hub preferably includes a 5 longitudinal hole defined by the interior walls of the hub 20. The interior walls of the hub 20 may form a cylinder of constant internal diameter.
Dolor Neuropático Que Es
In a variation, there is no central hole, which permits a smaller bearing configuration. RELATED APPLICATIONS 5 The present invention claims priority to previously filed US Provisional Patent Application Number 61/330,268 filed April 30, 2010, the contents of which are herein incorporated by reference in their entirety. Another object according to an embodiment of the present invention is to provide an arrangment for connecting one or more such unidirectional hydro turbine generating units of the present invention to a shore-located electrical distribution system that addresses some of the limitations of the prior art. In one embodiment, the inlet 42 is substantially circular in the elevation view, and the outlet 44 is oblong.
FIG. 6 is a plan view of the diffuser duct with a circular inlet and outlet in a unidirectional turbine according to the invention. 5 FIG. 7 is a rear elevation view of the diffuser duct with a circular inlet and outlet in a unidirectional turbine according to the invention. FIG. 39 is a perspective view of a cambered hydro turbine blade comprising multiply beaded surface features according to an embodiment of the present invention. WO 2011/134090 PCT/CA2011/050264 4 Another object of the present invention according to one embodiment is to provide a hydro turbine generator including a single-sided axial-flux magnetic generator which provides an axial bearing function to support at least a portion of an axial bearing load. The current technology for hydro turbine generators is unsatisfactory for providing a unidirectional hydro turbine generator design which is advantageously configured for efficient and cost-effective electrical generation in unidirectional fluid flow environments, 20 such as river or ocean currents.
Tecnicas De Relajacion
There is a need therefore for a unidirectional hydro turbine generator which provides improved efficiency and performance of the turbine and generator components, for improved reliability and longevity in aggressive and/or corrosive submerged operating environments, or for reduced complexity and cost of manufacture, operation or maintenance. The unidirectional turbine generator unit 10 with diffuser duct may be used as a single turbine generator unit 10 or with a plurality of turbine generator units 10, typically deployed in river environments, although the design may be used in other environments such as sub-sea tidal areas, tail-races or in wind energy units. Therefore the geometric range of (Autict/Ainet) for the duct 40 disclosed above may desirably provide benefits including one or more of: reducing the structural load imposed on the generator by the duct 40, reducing hydrodynamic drag due to the duct 40, reducing 15 manufacturing, deployment and maintenance/replacement cost of the duct 40, reducing overall depth and length of the duct 40, and reducing generation of downstream turbulence, which may also desirably reduce the effect of an upstream generator unit on one or more downstream units such as in a generator array or farm configuration, thereby providing for optimal exploitation of a unidirectional fluid flow resource.
More particularly, the present invention relates to hydro turbines adapted for use in unidirectional water flows and having enhanced 15 outer duct arrangements, turbine blade designs, and magnetic generator configurations, and an arrangement for connecting such turbines to an electrical distribution system. 10 2. Dolor muscular en todo el cuerpo . TECHNICAL FIELD The present invention relates generally to unidirectional hydro turbines adapted for use in unidirectional water flow environments. The Davis reference also discloses a hydro turbine with a dual-sided axial-flux magnetic generator adapted for use in bidirectional fluid flow applications. A hub 20 with an axis substantially parallel to the direction of water flow 100 is disposed along the central longitudinal axis of the turbine generator 10. The hub 20 has a hub nose 21 at the inlet end which may be advantageously formed in any hydrodynamic shape. 20 The flared feature or diverging diameter of the duct 40 may be described by a geometric relationship which maximizes the diffusion efficiency of the duct.
Design characteristics of the 25 duct 40 have been determined and are herein disclosed which exhibit optimal flow and therefore power generation characteristics. The longitudinal or central hole functions to reduce the resulting flow separation downstream of the hub 20 and therefore increases the total mass flow through the turbine annulus or flow area. 25 The turbine generator unit 10 has two ends about a center line, with an intake, upstream or inlet end on one hand, and an outflow, downstream or outlet end on the other. FIG. 2 illustrates the profile of the inner surface of the duct 40 from the start of the flare section of the duct to the downstream or outlet edge. Another object of certain embodiments of the present invention is to provide a low profile design for efficient operation in shallow fluid streams or areas of low water depth.
Yet a further object of the present invention according to certain embodiments is to 25 provide a hydro turbine generator with an enhanced turbine blade design incorporating one or more tapered and/or raked turbine blades. According to one embodiment of the present invention, a hydro turbine generator apparatus for generating electrical power from water flow is provided. 3. BACKGROUND OF THE INVENTION 20 Underwater hydro turbines for generating electrical power from water flows are known in the art. 4,025,220 to Thompson discloses a unidirectional hydro turbine for generating electrical power from water flow. Inyeccion para dolor de espalda baja . It will be apparent that the present invention provides an efficient power generator unit with improved hydrodynamic, generator, bearing and blade design features resulting in a highly efficient and non-complex (from the perspective of manufacture, maintenance, and operation) design suitable for shallow river applications as well as deep ocean current locations and is environmentally friendly.
- Descongestivos (Afrin, Suphedrine PE, Sudafed)
- Apparatus as recited in claim 10, further comprising said magnet carried by said platform
- Es el principal componente de la bilis, necesaria para la digestión de las grasas
- Llanto con gritos o sin ellos
- Astenia (debilidad muscular, malestar general y fatiga)
- Y02-TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- El mango
25 4. SUMMARY OF THE INVENTION It is an object of the present invention to implement an apparatus for a hydro turbine generator that overcomes some of the disadvantages of the prior art. More particularly, 30 another object of the present invention is to provide a unidirectional hydro turbine WO 2011/134090 PCT/CA2011/050264 3 apparatus for flooded use in unidirectional water flow environments that addresses some of the limitations of the prior art. WO 2011/134090 PCT/CA2011/050264 7 FIG. WO 2011/134090 PCT/CA2011/050264 5 FIG. WO 2011/134090 PCT/CA2011/050264 UNIDIRECTIONAL HYDRO TURBINE WITH ENHANCED DUCT, BLADES AND GENERATOR. WO 2011/134090 PCT/CA2011/050264 8 FIG. FIG. 50 is a schematic view of an in-stream hydro turbine generator farm 600 according to an embodiment of the invention. 20 is a side elevation view of the diffuser duct with aft diffusion cut-outs in a unidirectional turbine according to the invention. FIG. 4 is an isometric view of the diffuser duct with a circular inlet and outlet in a unidirectional turbine according to the invention.