Abstract:
This invention relates to an energy conversion system (1) of the type used in small scale installations producing no more than 0.5Mw electric, 3Mw thermal energy output. The energy conversion system comprises a fluidized bed unit, a by-product fuel feed system, a heat exchanger, an exhaust filter and a negative pressure system. In combination, these provide a compact system capable of use with small amounts of by-product fuel that will adequately treat the by-product fuel so that it does not pose an environmental hazard. The energy conversion system thermally treats by-product and harnesses the heat generated by thermally treating the by-product. The harnessed heat may be used to produce steam or electricity and the heat, steam or electricity can be used in the operation of the installation thereby reducing the overhead operation costs of the small scale installation.
Abstract:
The present invention is directed to a by-product fuel delivery assembly (5) for delivering by-product fuel to a fluidised bed unit (3), the by-product fuel delivery assembly comprising a fuel hopper (25), a fuel conveyer (29) and a fuel metering device (27). The fuel hopper comprises a fuel feed mechanism (71) that comprises a plurality of laterally arranged push bars (55) and a plurality of laterally arranged stop bars (57). The push bars and stop bars co-operate to feed by-product fuel sitting on the base of the fuel hopper along the base of the fuel hopper towards the discharge slot (59) of the fuel hopper and provides a simple, effective, low-cost and low maintenance solution to the problem of feeding by-product fuel from the fuel hopper. The invention is also directed to embodiments of the fuel conveyer using a link chain (95) and a fuel metering unit using a pair of contra rotating fuel feed augers (75, 77).
Abstract:
This invention relates to a fluidised bed unit for use in thermally treating a by-product. The unit forms part of an energy conversion system that is suitable for installation on a farm or small scale installation that handles the by-product. The unit comprises a furnace having a fuel charging inlet, a furnace sump for storing fluidised bed media, a clinker extraction unit mounted in the sump adjacent the base of the sump for removing clinkers from the fluidised bed media through a sump discharge aperture, a burner unit and an air introducer assembly comprising a forced draught fan, a single air box coupled to the forced draught fan and a plurality of nozzles fed by the air box. The fluidised bed unit is compact, relatively simple to maintain and commercially viable so that it may be installed on a farm or in a processing plant to process a by-product.
Abstract:
The present invention relates to a by-product energy conversion system comprising a fluidised bed unit and a heat exchanger, the fluidised bed unit having an air introducer with an air intake and the heat exchanger being connected to an exhaust outlet, wherein the fluidised bed unit receives by-product fuel from a fuel delivery assembly for combustion, generating heated exhaust gases; the by-product energy conversion system further comprising an internal draught system having a forced draught fan and an induction fan; wherein the internal draught system is operable to induce a negative pressure so as to produce a pressure differential within the by-product energy conversion system. In this way, the thermal treatment of the exhaust materials by-product may be accurately controlled.
Abstract:
This invention relates to a process of rearing poultry. The process comprises the steps of housing the poultry in a heated poultry shed, collecting poultry litter from the poultry shed, thermally treating the poultry litter and harnessing heat generated by the thermally treated poultry litter, and heating the poultry shed using the harnessed heat. In this way, the poultry litter may be used to heat the poultry in the shed and other expensive fuels will not have to be purchased to carry out this task, thereby reducing the operating cost of the poultry rearing process. Furthermore, the poultry litter will be available in an abundant supply. Due to the fact that the fuel is so readily available, it is possible to preheat the sheds to the ideal temperature prior to receiving the poultry and ventilate the poultry sheds both of which will result in the poultry thriving.
Abstract:
The invention concerns a tibial prosthetic component comprising a plate (100) for forming a tibial plateau of a tibia (16), wherein a peripheral region of the plate (100) has a thickness of less than 3mm. The invention also concerns a tibial prosthetic component having a keel of depth less than 9mm. The invention also concerns a method of selecting a tibial prosthetic component comprising receiving measurements of at least one physical attribute of an individual into whom the tibial prosthetic component is to be implanted, selecting a thickness of a plate (100) and depth of keel of the tibial prosthetic component based on the measurements and providing a tibial prosthetic component comprising a plate (100) having the selected thickness and a keel having the selected depth. The invention may also comprise implanting a tibial prosthetic component selected in accordance with this method into an individual and a kit comprising a plurality of prosthetic components comprising plates having different thicknesses with keels of different depths.
Abstract:
A kit of parts for use in unicondylar knee replacement of a patient having a femur and a tibia comprises a drill guide (4) and an intramedullary rod (5), the intramedullary rod being sized to fit within the intramedullary canal of the femur of the patient. The drill guide is arranged so as to engage a distal end of the intramedullary rod to that which engages the patient's intramedullary canal, and is formed with a foot portion (9) sized to fit between the patient's femur and tibia before any bone is removed from the femur or tibia. The drill guide provides a guide for drilling of at least one hole in the femur. A further kit of parts for use in unicondylar knee replacement of a patient having a femur and a tibia comprises a femoral component (3) for implantation in the femur, the femoral component having a bearing surface having a radius of curvature, and a guide spoon (13). The guide spoon has a bowl-shaped portion (14) with an internal radius of curvature the same as that of the bearing surface, and a handle portion (16) extending from the bowl- shaped portion. Methods of performing unicondylar knee replacement are also described.
Abstract:
A cooling system for an electronics chassis includes a plurality of centrifugal blowers arranged to motivate cooling air through the electronics chassis. The centrifugal blowers are arranged in one or more sets, each having blowers oriented with respective inlets in mutual facing relationship. The orientation, positioning, and alignment of the centrifugal blowers facilitates a compact arrangement of the plurality of blowers that achieves increased aerodynamic efficiencies to reduce noise output and energy consumption.
Abstract:
A femoral extension prosthetic component for use in a unicondylar meniscal bearing unicompartmental knee replacement is described. The femoral component comprises a securing element and a bearing surface, the securing element adapted to abut and be connected to a distal end of a femur bone, and the bearing surface adapted to abut a meniscal bearing. The femoral component includes an entrapment portion adapted to extend beyond the meniscal bearing. Tibial components and meniscal bearings are also described, as well as methods of using such components.
Abstract:
A bearing component (2) for a joint replacement prosthesis comprises a first bearing element (4); a second bearing element (6), and a linking element (8), operatively connecting the first and second bearing elements (4, 6) and permitting relative motion there between. The flexible linking element (8) prevents dislocation of mobile bearings in a total knee replacement prosthesis. The invention also relates to a bridging element which retains the linking element 8 with some play, which acts as a ligament support (2051), and which causes a deflection of the line of action of a ligament (1018). A joint replacement prosthesis is also disclosed comprising a biasing element (1140) or a tensioning element (1220) operatively coupled to the artificial ligament (1018). The biasing element (1140) or tensioning element (1220) may be housed in the stem of a tibial tray (1006).