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Highlight:
Marine Current Turbine (MCT), a construction company in the United Kingdom, recently gained approval from the Environment & Heritage Service in Northern Ireland to begin building a 100-kw tidal energy electric generator, which is like an upside-down wind turbine, submerged in the ocean, with giant blades generating power as they are turned by the current.
Original source:
http://renewableenergyaccess.com/rea/news/story?id=40835
Summary:
- A UK company has been granted construction approval for installation of a commercial scale tidal energy electric generator that is similar in design to that of an upside down wind turbine, except with two smaller turbines mounted on each side of a monopile.
- Marine Current Turbine (MCT) received the approval by the Environment & Heritage Service in Northern Ireland to install its next generation tidal energy device, the 1000 kW SeaGen tidal energy turbine, in Northern Ireland's Strangford Lough, a tidal estuary channel with considerable energy potential.
- The SeaGen project, which has received a GBP 4.27 million (USD$ 7.4 million) grant from the UK's Department of Trade and Industry's (DTI) technology program, will be installed and connected to the National Grid next year.
- They can be installed in the sea at places with high tidal current velocities, or in a few places with fast enough continuous ocean currents, to take out energy from these huge volumes of flowing water.
- The technology under development by MCT consists of twin axial flow rotors of 15m to 20m in diameter, each driving a generator via a gearbox much like a hydro-electric turbine or a wind turbine.
- The twin power units of each system are mounted on wing-like extensions either side of a tubular steel monopile some 3 m in diameter which is set into a hole drilled into the seabed.
- A unique, patented feature of MCT's technology is that the turbines and accompanying power units can be raised bodily up the support pile clear above sea-level to permit access for maintenance from small service vessels.
- MCT said that Environmental Impact Analyses completed by independent consultants have confirmed their belief that the technology does not offer any serious threat to fish or marine mammals.
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