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Offshore wind energy

Offshore winds for a new type of marine energy

Floating wind turbines harness the energy of offshore winds in deep maritime areas farther from the coast, which are powerful and constant.

Unlike fixed-foundation wind turbines that are supported by a base, which is directly set on the seabed using a gravity foundation, this solution is based on a floating structure — in concrete, steel or a steel/concrete hybrid combination — fixed to the seabed by an anchoring system that controls its movements. Compared to fixed-foundation wind turbines, this innovative technology overcomes the constraints of deep-water installation and is able to produce renewable energy farther from the coast with a low visual impact.

Our innovative solutions

Naval Energies, a sub-system engineering leader and tier-one partner for project operators, proposes a mature response for the semi-submersible floater, the prototype of which has been tested under constraint and certified by Veritas.

A basic building block for the success of floating wind turbines in France, our floater is designed to be competitive, produced in series and easily operated. It can be adapted to the specificities of the operating site and local industrial ecosystems. The flagship of our innovative capacity, this floater is integrated within the “Groix and Belle-Île floating turbine” project, for which we are the prime contractor for the realisation, sea installation and floater connection.

Coordinated by Eolfi, the “Groix and Belle-Île floating turbine” pilot project foresees the installation of four 6-MW wind turbines, capable of producing the electricity for 30,000 households on the Atlantic coast.

The advantages of our technology  

Thanks to the highly-technical know-how of our teams, we are able to intervene in a vast range of studies, services and developments suited to the specificities of the project, its location and its technical constraints.

Our technological solutions — semi-submersible floaters, anchoring systems, underwater cables and connection solutions, sea installation – distinguish themselves through their reliability and the simplicity of their deployment and maintenance.

Market perspectives

With a technically-exploitable potential (TEP) of 3500 GW globally, floating wind turbines represent the largest source of marine renewable energy for the future, far greater than fixed-foundation offshore wind turbines.

In France, the estimates are as high as 50 GW. The experimentation with the Groix and Belle-Île pilot farm, for which Naval Energies intervenes in partnership with Vinci, General Electric and Valemo, is in this regard decisive. The project, coordinated by Eolfi, allows the optimisation of the infrastructures and technologies and the validation of the economic model prior to the industrialisation phase and larger-scale deployments.