DCNS in 2015
BY AGNÈS CASENAVE — Farm project programme manager – Cape Sharp, Canada, Marine Energies & A submergence that also reaches great heights for Infrastructure department DCNS and its subsidiary, specialised in tidal turbines, which have designed and built this high-technology prototype for EDF. It further confirms their potential DCNS and its subsidiary OpenHydro are and ambitions on the marine renewable energy market. creating an experimental tidal turbine farm In 2016, its twin, currently being assembled at the for EDF in the Paimpol-Bréhat sea area, off DCNS Cherbourg and Brest sites, will join the tidal turBrittany. An example of technological and bine installed at Paimpol-Bréhat. The two machines will industrial prowess, which will soon be be connected to an underwater converter and conrepeated in Normandy, the United Kingdom nected by cable to the national grid. EDF will then be and Canada. On the rapidly expanding marine operating the world’s first experimental tidal turbine renewable energies market, DCNS is marking a farm, delivering an output of 4 megawatts (MW). new milestone. The DCNS and OpenHydro teams will then focus their An unusual crew is cruising off the Côtes-d’Armor coast efforts on harnessing one of the most powerful marine on this Wednesday 20 January 2016: a black barge currents in Europe, at raz Blanchard, off the coast of topped by an enormous grey and yellow wheel bearing Cherbourg. Once again, they have been selected with the DCNS, OpenHydro and EDF logos. Three partners EDF Energies Nouvelles in the context of an invitation brought together to score a world first: the submer- to express interest issued by the French Environment gence of a 300-tonne tidal turbine, 16 metres in diame- and energy management agency (Ademe) for a pioter, capable of converting the powerful currents off the neering programme, to be funded by Ministry investArmorican coast into electricity. The circular turbine is ments in the f uture. This involves building and slowly lowered through an opening in the centre of the deploying seven tidal turbines at a pilot farm capable barge until it disappears. One hour later, the 20 DCNS of providing a total power of 14 MW. and OpenHydro technicians can celebrate. The machine has been gently positioned on the seafloor at a depth of 40 meters without requiring any kind of civil engineering (drilling, levelling, etc.) liable to disturb the marine environment. It simply rests on a 700-tonne steel tripod and was lowered using an ingenious winch system – which will also be used to bring the tidal turbine back to the surface for maintenance.
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