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    Peterkim 2008. 10. 23. 15:51

    Reverse Half-Pipes makes it possible to haul gear without divers. 

    I have chosen to use cheap materials only, in this demonstration, because the need to bring down production costs, and make it possible to build this type of wave generation device, any where in the world, and with local materials, as car parts etc, which doesn't needs to be imported. Other materials could of course be used, and the schematics for its design of course, be different. Simple is better, it is said, and fewer parts, and bearings, will bring lower cost of building, and also repair.

    We can here see energy content in waves, The numbers means kW per hour, and meters of wave. South America, 97 kW per meter of wave, for example, that means, a Wavereaper™ device, which is 100 meters broad, would generate 9.7 mw, cost would be around 1200 000 Dollar, for that device. However, the revenue would be over 400 000 dollars monthly with current energy price.

     

    This is a simple schematic, showing buoys, wire and one-way bearing, connected together.In case of storm and rough waves, it is a problem, for all wave energy constructions, however, the Wavereaper™, has a built in safety feature in its construction, that would avoid damage on the equipment, its due to the max lifting force of the barrels, since the will sink under the surface, if the force is to great. this will make the Wavereaper™ possible to work in any weather, however it should be constructed, to take advantage, of the medium wave, that is present at all time, for best cost benefit of the plant.

     

     

    The wire is connected to a chain in the end, witch works on a gearwheel sitting on a one-way bearing, mounted on an axle. This translates the pulling force of the wire, to an circular movement which is good for cheap generators. The wire is for this case 4 mm stainless steel, which give a lifting ability of approx 300 Kg before it brakes. Also plastic can be used as Pvc band, which today is commonly used for packaging goods on pallets, this type of Pvc band has high strength, and is also light, and cost-effective, of course the UV light from the sun is affecting it in the long run, but the part that is in the water, should be somewhat guarded from the UV rays.

    Flywheels is also mounted on the axle, to collect, even out/store the momentum which is produced by the lifting barrel, this will even out and, smooth the turning's of the axle, to the generator, which is driven by a pulley, who will give it correct rpm. A simple brake, which can never wear down, is also planned, in those cases, constant current generators, or a special electronical device is not used.

     

    Pipes mounted on the wire, which means we can haul in and out the device, without leaving the shoreline. With this configuration, if one set of barrels malfunction, only 10% of the plants output is lost, it can be hauled in to the shore and serviced, with ease, and without complicated offshore operations. When the wire coming to the generator housing, a chain is mounted to the wire, which drive the Gear wheel, and the one way bearing, which makes the chain draw, when the waves raises the barrel, but let it spin freely back, when the wave height is going down again, also a small weight is connected to the chain, to make it even out slack of the wire. A flywheel is mounted, and a pulley drives the generator, evenly.

     

    One-way bearing, with pulley and wire, with bigger loads, chain and gearwheel, is an option. one-way bearings can be seen in ex. bicycles, the rotate freely in one direction, but in the other direction, they grip, and transfer force, this is used in the Wave reaper, and makes it simple, and cost effective. The waves up and down, movement is translated to rotating movement, suited for a generator, of choice.