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Offshore turbine to generate power
Turbine off the Devon coast
The first offshore turbine is close to the Devon coast
Energy pioneers have launched the world's first offshore tidal energy turbine off the Devon coast.

Jonathan Morris reports on the prospects for this new type of sustainable energy.
SEE ALSO
Green energy could power SW region

Call for offshore windfarms

Changing the face of energy
WEB LINKS
Marine Current Turbines

Centre for Sustainable Energy

Coastal Research

Seacore Ltd

Department of Trade and Industry


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FACTS

If the trial is successful commercial production of marine turbines could begin as early as 2006.

Research suggests they have the potential to be four times more efficient than wind turbines of a similar size.

There are many other potential sites around the UK where the tides are strong enough to make marine turbines a serious proposition.

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The world's first marine current turbine has been installed just off the coast of North Devon.

The 3m turbine has been built into the seabed about a kilometre and a half (one mile) offshore from Lynmouth.

The single 11 metre-long rotor blade will be capable of producing 300 kilowatts of electricity and will be a test-bed for further tidal turbines.

It is hoped to convert the system to twin rotors by the end of next year.

Project developers Marine Current Turbines Ltd and Cornwall-based Seacore hope to have the turbine hooked up to the national grid by the end of August 2003.

Martin Wright, of Marine Current Turbines Ltd, said: "We estimate that there is at least 10 gigawatts of power available from tidal power in the UK.

"That's the same as about half of the existing nuclear industry."

Marine turbine
Artist's impression of a double rotor tidal machine
A marine current turbine looks like a smaller version of a modern windmill and the principle is exactly the same.

But whereas a windmill draws energy from the movement of air, the marine turbine uses currents in the water.

Its backers believe the concept can become a rival to wind power because ocean currents are more reliable than wind and also because they are less obtrusive; the structure is built on the seabed and projects just a few metres above the surface.

There is no danger to fish because the blades rotate quite slowly - about 20 revolutions per minute.

Several experimental devices working on similar principles have been built before, but the turbine unveiled in Devon is the first such permanent installation in the world to generate electricity.

If it performs as expected, the consortium behind it hopes to build a whole set of turbines in the area - a tidal farm.

The project is financed by the Department of Trade and Industry and the European Commission's energy programme.


First published: 18th June 2003
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