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Electricity from waves is estimated to cost seven times as much as coal-fired power. |
Wave harvester by Perpetuwave power. Energy is transferred from the array of light weight hybrid floats and attached trailing arms to a common generator via a simple direct drive system. |
Pelamis Wave Energy ConverterFloat systems bend, squeezing the working fluid through onshore turbines.
Pelamis is based in Edinburgh Scotland
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WeptosWave EnergyPower Take Off System.
Click image to play video
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Click this image to play video. The floats all turn the same axle to supply continuous power. The device is anchored with a single anchor line.
The angle is varied according to wave conditions. Wide angle for smaller waves. Click on image to play video. |
SeatricityA float travels up and down with the waves and operates a pump to pressurise sea water which is piped ashore. Many individual pumps are connected together to produce an even pressure. Once ashore the pressurised water can be used to drive a turbine or desalinate water. |
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Ocean Power TechnologiesThe buoy rides up and down with a rod moving through the centre of the buoy. "The resultant mechanical stroking is converted via a sophisticated power take-off to drive an electrical generator." (They think we are idiots.)
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FortumFortum is a large enrgy company planning to build a large wave farm in Sweden
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McCabe Wave pump
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Euro Wave Energy
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Bolt lifesaver wave power
The buoy is moored to the bottom with 3 taught cables. The motion tightens and loosens the cables (presumably against a spring) that then turn a generator.
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Brandl generator
"A floating round disk of about 10m in diameter and 1 m thickness and a hollow cylinder perpendicular to the coils of the linear generator and fall with the waves. In the hollow cylinder opposite swinging a pendulum mass together with the magnets which induce by their relative movement to the coils an electrical current." |
StingRAY Website |
Resen - Denmark
The buoy is tethered to the bottom with a taught line. On the buoy it is attached to one end of a lever (yellow). The motion pulls the lever up and down turning a set of gears and a generator. |
In large waves the buoy is pulled under the crest, thus avoiding damage. |
GMR buoy - Galicia Mar Renovables
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The tower is fixed to teh bottom and the float rides up and down. Energy is removed via a rack and pinion gear. |
Penguin Wave Energy ConverterThe Penguin is designed by Wello Oy in Finland to capture rotational energy generated by the movement of its asymmetrically shaped hull, which rolls, heaves and pitches with each passing wave. This motion is used to spin an asymmetric flywheel. This drives an electric generator to produce electricity.
Perhaps the flywheel could be connected directly to a propeller shaft for propulsion? |
Click on image to play video |
Buldra
Norway and Europe Website |
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Blue Energy - Ocean PowerA series of patented ideas using floats to drive a pump for either air or water. Source
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Idea from Israel |
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IWave - Indian Wave Energy DeviceIt is a floating device tethered with chains to piles driven to ocean bottom. The wave action raises the heavy partially buoyant piston that drives the overhead crankshaft by half turn. The receding wave drops the piston completing the balance half turn. One revolution is obtained for every wave. Using gear box and generator the current is produced continuously. Website https://www.youtube.com/watch?v=tt_lqFyc6Co&list=PL3F6E85456819BC8C |
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Other groups working on this approach http://abencis.com/energia-marina.php
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Electricity generating wave pipe EGWP
The patent diagram looks like a float inside a pipe. The patent has lapsed in Aust. Website
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