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SeaGen - Model S -Twin Power System
The SeaGen S system consists of twin power trains mounted on a crossbeam. The cross beam can be raised above the water for routine maintenance by winching it up the monopole support structure. SeaGen S is suitable for marine environments in water depths up to 38m and achieves rated power in tidal currents of greater than 2.4m/s. The 1.2MW system installed in Strangford Lough, Northern Ireland, in 2008 has been subject to 4 years of extensive testing.
MCT is bringing a 2.0MW SeaGen S Mk 2 product to market for use in commercial scale tidal projects, including the demonstration array projects initiated by MCT.
The SeaGen S Mk2 product has incorporated a number of design changes following testing of the system in Strangford, with the most significant being an increased rated power to 2MW and an increased rotor diameter to 20m.
The SeaGen S system has the largest swept area of all the commercial scale tidal products currently available. The turbines have a patented feature by which the rotor blades can be pitched through 180 degrees, allowing them to optimise energy capture and operate in bi-directional flows.
The rotors are positioned in top third of the water column where tidal currents are strongest, therefore maximising the energy capture.
These design features allow the SeaGen S system at Strangford Lough to achieve more than 48% efficiency over a broad range of current velocities.