Oscillating Water Column (OWC)
This method of generating power from the tide works by using a column of water as a piston to pump air and drive a turbine to generate power. This type of device can be fixed to the seabed or installed on shore.
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In Scotland, the Government awarded three wave energy projects under the Scottish Renewable Obligation. Only one of these projects has been realized and is generating power in Scotland as this pack is being written, this is the LIMPET 500 on the Island of Islay of the west coast, enabling the Island to take a step towards becoming self sufficient in renewable energy. For more information see the LIMPET Case Study.
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The video link shows how the Oscillating Water Column works and how it transfers the energy.
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