AU2008323631B2 – A Power Generator – Google Patents

Si sufre de dolor de cabeza sepa de qué tipo es y cómo.. The assembly 1Oa can also be 20 neutrally buoyant and allowed to swing and change direction to operate on incoming and outgoing tides. The assembly 10d can also be neutrally buoyant and allowed to swing and change direction to operate on incoming and outgoing tides. Unlike, for example, bio- and fossil fuel which, when used in electrical power generation, go hand-in-hand with emission of harmful combustion gasses into the atmosphere, generation of power by using flowing fluids has no or very little adverse effects on the atmosphere. For example, the exit stay cables 38 can also be removed such that the assembly 10d is supported by only the stay cables 36 and finds its own optimal alignment to flow much’like a windsock does. Further alternatively, the excitation current 55 can be applied to the primary coil 52. In this configuration, the secondary coils 54a and the magnetic field 56 are not 10 required.

The present invention is expected to be particularly advantageously, but not exclusively, used in the context of hydro-powered electricity generation. The assembly 1 Oi is similar in construction and operation to the assembly 10g described with reference to Fig. I and 2 and like reference numerals to those used in describing the first and second embodiments shall be used to indicate like features in Fig 3. In the assembly 10c, the blade assembly 14 has a blade arrangement, in the form of a series of independent beams 22 which are arranged in a generally helical fashion 25 about the rotational axis 20. The beams 22 are connected to the shaft 24 with sufficient clearance so they can rotated about the axis 20 with respect to each other. In another embodiment, the slotted ejector arrangement is of unitary construction, with a helical slot therein, and preferably diverges diametrically away from the shroud.

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6. 15 The slotted ejector arrangement 102 is connected to the shroud 50 and thus rotates with the shroud 50. However, in the assembly 10f, the slotted ejector arrangement 102 is of unitary construction with a single helical slot forming the gaps 104 between the sections 106. It should be noted that the length of the slotted ejector 102 can be adjusted to change the width of the slots 104 to vary the effect of injection and power output. 50. The slotted ejector arrangement 102 is connected to the shroud 50 and thus rotates with the shroud 50. Dolor lumbar izquierdo sintomas . The gaps 104 between spaced apart sections 106 of the slotted ejector arrangement 102 allow fluid flowing around the exterior of the assembly l0e to effectively inject, as shown by arrows 108, into the fluid io flow leaving the shroud. In another form, the assembly preferably includes a drive means adapted to vary the axial length and radial width of the slotted ejector arrangement.

Alternative arrangements of the stay cables 36 and 38 1o may be more suitable for other applications. Known installations for harvesting hydropower, for example tidal power, on the other hand, have relatively higher generation capacity. WO 2009/062261 PCT/AU2008/001704 13 When a small excitation current 55 is applied to the secondary coils 54a, the magnetic field 56 is created which induces a current in the primary coils 52. The primary coils 52 then create the magnetic field 57 which, together with the rotational motion of the primary coils 52, induces a large current inside the secondary power coils 54b that is.

1. The primary coils 52 are also integrated into the shroud head end section 50a, and the secondary coil 54a and the secondary power coil 54b are integrated into the stator, similar to that described with reference to the assembly 1 Oa in Fig. Fig. 9 shows a ninth embodiment of an electric power generator assembly 10i. Like features to those described with reference to earlier embodiments are again denoted with like reference numerals. 7 is a schematic cross sectional view of a seventh embodiment of a power generator; Fig. 1. The primary coils 52 are also integrated into the shroud head end section 50a, also similar to that described with reference to the assembly 10a in Fig. This advantageously allows the turbine efficiency and power output to be significantly increased for a range of flow velocities.

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2, and are positioned external the shroud 50. The fluid flow 12 enters the assembly 10c and imparts its energy to the skin 40 and the beams 22. As the fluid 12 applies a force to the beams 22, the beams 22 react by imparting a rotational force or torque to the shaft 24. When a small excitation current 55 is applied to the secondary coils 54a, the 30 magnetic field 56 is created which induces a current in the primary coils 52. The primary coils 52 then create the magnetic field 57 which, together with the rotational motion of WO 2009/062261 PCT/AU2008/001704 12 the primary coils 52, induces a large current inside the secondary power coils 54b that is connected for electricity generation 58. In the assembly 10c, the shroud 50 also includes vanes 90 installed on the leading edge of the shroud head end section 50a in order to further increase the vortex s induced in front of the shroud 50. This vortex is further aided by the increased velocity of the tips of the beams 22 at the entry of the head end 16 of the blade assembly 14 in creating suction pressure at the head end 16 of the shroud 50. The combination of: decreased pressure inside the shroud 50; decreased pressure behind the shroud 50; the rotating shroud 50 inducing a vortex in front of the blade assembly 14; the flow vanes 90 1o inducing a vortex in front of the blade assembly 14; and the smaller pitch of the blades at the entry of the blade assembly 14 results in substantially more fluid being sucked into the blade assembly 14 than would otherwise occur.

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30 arrangement 102 in slow flows to draw more water through and increase power output. Dolor de espalda y torax . 22 can be altered in order to operate the generator assembly 10 at maximum efficiency or 20 power output. Each mounting formation preferably includes a bearing element connected to an end section of the shaft, the bearing elements in use being mounted on an anchored support structure, such that the power generator assembly rotates relative to the support structure. The assembly I Oa also includes a stator 100. 25 A series of primary coils 52 are integrated into the shroud head end section 50a,. by being wound around the extent of same. The beams 22 are held in place at the head end 16 of the shaft 24 via a flange (not shown) and, at the tail end 18, the shaft 24 is threaded and a nut (not shown) is tightened to apply force along the shaft 24 and lock the 30 beams 22 in place.

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7. However, in the assembly 10h, the slotted ejector arrangement 102 is not connected to the shroud 50 and does not rotate with the shroud 50. The slotted ejector arrangement 102 is instead connected to an extension 72′ of the structural beam 72 via the 1o supports 84 and thus remains stationary whilst the shroud 50 rotates. In one embodiment, the slotted ejector arrangement includes a plurality of spaced apart tubular sections, and most preferably diverges diametrically away from the shroud. Preferably, the connections between the webs or skins and the shroud are substantially fluid impervious connections. The shroud, preferably, is of multi-section or unitary moulded construction, having a head end section via which a flowing fluid enters the shroud, a tail end section via which flowing fluid exits the shroud, and an elongated intermediate section extending between the head end section and the tail end section, with the intermediate section converging from the head end section towards the tail end section.

2. Como tratar el dolor de rodilla . The secondary coils 54a and the secondary power coils 54b are also similar to that described with reference to the assembly 10b in 25 Fig. WO 2009/062261 PCT/AU2008/001704 11 The length of each of the beams 22 decreases as they wind around the shaft 24 from the head end 16 to the tail end 18 within the generally frusto-conical boundary defined by the intermediate section 50c of the shroud 50. The shroud is similar to that described with reference to assembly 1 Oa in Fig. 6 Brief Description of the Drawings Preferred embodiments of the present invention will now be described, by way of examples only, with reference to the accompanying drawings wherein: Fig. 4 is a schematic cross sectional view of a fourth embodiment of a power generator; Fig. In a yet further variation, the power generator assembly includes a slotted ejector arrangement behind the shroud, most preferably adjacent the shroud tail end section.

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In one form, the assembly preferably includes a drive means adapted to vary the axial length of the slotted ejector arrangement. 1. 5 The assembly 10f also includes a slotted ejector arrangement 102 at the exit (ie. 58. The assembly 10d is held in a moving current by the stay cables 36 and 38. The stay cables 36 and 38 are connected to a suitable support structure installed in the ocean or alternatively, they could be connected to a bridge or set of cables spanning an ocean inlet or a set of support structures.

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The stay cables 36 and 38 are connected to a suitable support structure installed in the ocean or alternatively, they can be connected to a bridge or set of cables spanning an ocean inlet-or a set of support structures. 4 In another embodiment, if desired, the blade arrangement preferably includes one or more continuous helical blades. The blade arrangement, in this embodiment, further preferably includes a web or skin extending along the lengths of and connected to each pair of adjacent beams, such that the blade arrangement, irrespective of the pitch of each beam, is uninterrupted across its surface. The generator is preferably drivingly connected to the shaft. Dolor de espalda por riñones . In another form, the electrical power generator may also include a current supply electrically connected to each secondary coil, for energizing each secondary coil in order to induce a magnetic field which induces a current in each primary coil.