10 The diffusers described above typically are constructed of metal such as aluminium but may be constructed of other materials such as glass reinforced plastics or combinations of materials. 30 When applied to use in energy collection apparatus for extracting energy from a flowing liquid, the diffuser is typically positioned in a naturally occurring flow of water and a prime mover is positioned in or near the constriction. The diffuser 58 is comprised of a plurality of annular members 60 which defines a side wall 61 of the diffuser 58. The annular members 60 are of an asymmetrical aerofoil cross section and are arranged such that the flow passage 59 decreases in cross section from the inlet 62 to a 25 constriction 63 and then increases in cross section to the outlet 64. As before a cross flow turbine 65 of similar configuration to that described previously is arranged within the constriction 63. Further as before, gaps 66 are provided between the leading and trailing ends of adjacent annular members 60 to allow introduction of fluid flow from outside the diffuser 58 and into the flow passage 59. 30 The aerofoil section members of the diffusers of in the embodiments of Figs.
- Otros tranquilizantes
- Cast iron: High saturation magnetization (>2.2 T), high relative permeability (2000- 5000)
- Dificultad para respirar (disnea), sensación de falta de aire
- ωtower the known fundamental frequency of the tower motion
- Dolor de cabeza y de pecho
1, there is illustrated fluid energy extraction apparatus 10 according to an embodiment of the invention submerged within a flowing fluid for example within a river, the direction of flow of which is indicated by the arrow A. The apparatus 10 includes a diffuser 11 having top and bottom planar walls 12 and 13 and opposite side walls 14 defined by a plurality of linear aerofoil section members 15 of 20 constant cross section which extend between the top and bottom walls 12 and 13 and which have their leading and trailing edges extending linearly and substantially at right angles to the planar walls 12 and 13. The diffuser 11 thus defines a flow passage 16 of substantially rectangular cross section but which varies in dimensions between a leading inlet 17 and trailing outlet 18 of the diffuser 11. 25 The diffuser 11 is inounted on a pedestal 19 for rotation about a substantially vertical axis such that the diffuser II may automatically adjust to the direction of flow whereby the inlet 17 is always directed towards incoming fluid flow.
Dolor Espalda Media
Further, a plurality of prime movers may be mounted within the diffuser and connected to respective energy take off means. An electric generator 21 mounted to the underside of the diffuser 11 is coupled to the turbine 20 through any suitable transmission such as a gear transmission such that rotation of the turbine 20 causes the generator 21 to be driven. The shaft may extend through a side wall or wall of the diffuser to be coupled if desired through suitable gearing or a suitable transmission to the electrical generator. The controller 49 is programmable so that optimum operational positions of 10 the members 44 relative to sensed flow can be programmed into the controller 49 in accordance with flow in the diffuser flow passage as sensed by the sensor 51. The diffusers described with reference to Figs. The velocity of the flow of fluid in the flow passage may also be monitored by the microcontroller such that the optimum position of the aerofoil section members can be set in accordance with the velocity of flow to provide optimum output from the prime mover.
10 The turbine can be mounted either in a vertical orientation or alternatively, can be mounted horizontally, depending on location and constructional requirements. Such arrangements are commonly used in hydroelectric systems and usually use a head of water created through 10 the construction of a dam to create a flow of water through conduits in which turbines are positioned.
On the suction stroke of the piston 38 which is damped by the bleed valve 40, the stopper 41 prevents the movement exceeding 10 degrees in the opposite direction as in position B of Fig. Fig. 4B shows a – 10 degree pitch position with the pitch movement controlled by the stopper 41 preventing the piston 38 from further movement.
Dolor Neuropático Pdf
10 degree pitch position and the end of the piston 38 cooperating with the dampener cylinder 39 controlling the blade pitch. The diffuser in this configuration suitably has a pair of opposite spaced apart planar walls and a pair of opposite walls defined by the aerofoil section 25 members. Preferably the asymmetric aerofoil section members have their camber 25 arranged on the flow passage side of the diffuser. Mounted within the diffuser II in the flow passage 16 for rotation above a vertical 30 axis is a-turbine 20 for extracting energy from fluid flowing through the diffuser. Ejercicios para disminuir el dolor de espalda . Preferably for this purpose, the aerofoil section members are mounted for pivotal movement about their longitudinal axes and means are provided to adjust the pivotal position of the members. 15 Preferably the diffuser is mounted rotatably to the support means so as to adjust to the direction of the flow of fluid. The diffuser may be supported on a suitable support means positioned in the flow of fluid.
20 In yet a further aspect, the present invention provides apparatus for generating energy comprising a diffuser defining a flow passage having an inlet and an outlet and a side wall or walls between said inlet and said outlet, said side wall or walls being defined by a plurality of members of an aerofoil cross section arranged in series between said inlet and said outlet such that other than at the inlet and outlet, the trailing portion of one 25 aerofoil member is adjacent the leading portion of the immediately adjacent trailing aerofoil section member to define a gap or slot therewith whereby a plurality of gaps or slots are provided between said inlet and outlet through which fluid may pass from outside of said diffuser into said flow passage, said flow passage having a constricted region between said inlet and outlet, and a prime mover positioned in the constricted 30 region to drive an energy take-off means, the prime mover being configured to move in response to the flow of fluid through the constricted region.
The present invention in a further aspect thus provides a method of generating 10 energy, the method comprising the steps of providing a diffuser in a flowing fluid, said diffuser comprising a flow passage having an inlet and an outlet and a side wall or walls between said inlet and said outlet, said side wall or walls being defined by a plurality of members of an aerofoil cross section arranged in series between said inlet and said outlet and there being a gap or slot between adjacent said members whereby a plurality of gaps 15 or slots are provided between said inlet and outlet through which fluid may pass from outside of said diffuser into said flow passage, and said flow passage having a constricted region between said inlet and said outlet, and driving an energy take-off means with a prime mover positioned in the constricted region, the prime mover being configured to move in response to the flow of fluid through the constricted region.