Tidal Turbines in Normandy Set to Harness Ocean Energy

France is poised to expand its renewable energy capabilities by constructing a new tidal power plant off the coast of Normandy. This initiative, named NH1, aims to generate electricity from the natural ebb and flow of ocean tides.

The project will be located in the Alderney Strait, approximately 3.5 kilometers from the Normandy coastline. It will feature four tidal turbines, each with a capacity of 3 megawatts. Financial support for this venture comes from the European Union, which has committed EUR31.3 million to help bring this project to fruition.

The turbines, designated as the AR3000 model, bear a resemblance to wind turbines, albeit with significantly smaller blades. By harnessing the kinetic energy of moving water, these turbines are projected to produce an annual output of 34 gigawatt-hours, enough to meet the energy needs of approximately 15,000 residents. The NH1 facility is scheduled to be operational by 2028.

Utilizing the ocean's constant movement presents an efficient method for generating electricity. Various technologies exist for this purpose, including wave energy converters that employ floating or seabed-mounted generators, such as the CX2 energy buoy. Another approach is to capture tidal currents, as exemplified by the Dragon 12 device, which supplies power to the Faroe Islands. The predictable nature of tidal movements offers a more reliable energy source compared to wind or solar power.

Normandy's coastal region is characterized by strong tidal currents. In the vicinity of the NH1 site, water speeds can reach up to 12 knots (approximately 22 km/h) during spring tides. This area is historically significant as the location of the world's first tidal power plant, the Usine marémotrice de la Rance, which has been operational since 1967 and generates electricity at the mouth of the Rance River in Brittany.