Optimal conditions for marine and offshore wind energies

Thanks to its strong ocean waves, currents, and winds, Bretagne is a region with a high potential for harnessing marine renewable energy. It also enjoys a strong skills base in the maritime industry, which is crucial for growing this emergent sector along with the new technology required.

Proof of these good conditions is the multitude of projects in development, testing or pilot phase around the Breton coast:

CarteProjets

Download the sheet on the location of Brittany  among offshore wind farm

 

 

Focus on flagship projects

  • BOTTOM-FIXED OFFSHORE WIND FARM BAY OF SAINT-BRIEUC

62 x8mW wind turbines. Commissioning planned for 2023.

  • Goal: With 496 MW of installed capacity and 1,820 GWh of annual production, the project aims to supply the equivalent of the consumption of 835,000 inhabitants (including heating).
  • Project developers: Ailes Marines (IBERDROLA), Siemens Gamesa, Navantia/Windar
  • Technology employed:
    • 62 wind turbine Siemens Gamesa Renewable Energy SG 8.0-167 DD
    • jacket foundation (Navantia Windar)
  • Output power: 496 MW.
  • Overall cost: €2,5 billion.
  • TIDAL TURBINE TEST SITE IN PAIMPOL BRÉHAT

After EDF, in partnership with Naval Energie, achieved a world first by connecting its tidal turbine to the grid in 2008, today the site is making all its underwater installations available (submarine cable, connection station, submarine converter, etc.) and has the necessary permits to occupy the publicly-owned maritime domain.

CMN – HYDROQUEST TIDAL TURBINE

  • Goal: Produce a turbine of 1 MW
  • Project developers: CMN, Hydroquest (Partner : EDF)
  • Size: vertical axys, 25 x 10 x 11 m
  • Output power: 1 MW
  • Weight: 1400 t
  • OFF-GRID ISLAND MODEL

The island of Ouessant is a model of a 100% autonomous island using 100% renewable energy and includes the connection of a tidal turbine, a photovoltaic power plant and an electricity storage system. Smart grids regulate and manage consumption and production using an energy management system.

It is a genuine model of energy autonomy that is ready-to-market and can be replicated in other energy-isolated areas.

Tidal Turbine / Sabella D12

  • Goal: develop a simple & robust marine turbine, with high reliability and low maintenance.
  • Project developers: Sabella, AKUO Energy.
  • Output power: 2 tidal turbines of 12m diameter generating 500 kW each.
  • Technology employed: Bottom-fixed tidal current turbine designed by Sabella. 20/25 year operational lifespan.
  • SAINTE ANNE-DU-PORTZIC (BREST)

As well as its tanks for testing wind turbines, IFREMER enables companies such as Eolink to test the most innovative floating wind turbine prototypes at 1/10th scale.

EOLINK PROJECT FLOATING WIND

  • Goal: Produce a new floating wind turbine on tripod (scale 1/10)
  • Project developers: Eolink with the support of IFREMER and Regional Council of Bretagne
  • Technology: EOLINK design targets the biggest power/weight ratio in order to get the best-in-class LCOE. First time such ratio between swept area and floater’s size is tested.
  • Output power: 12 MW (Scale 1).
  • FLOATING WIND TURBINE PILOT SITEAT GROIX BELLE-ILE

1st real-scale test for the 3 x 9,5 MW Eolfi wind turbines. Commissioning planned for 2022.

  • Goal: set up a pilot farm with 3 turbines to deliver 28,5 MW.
  • Project developers: Eolfi Offshore France, CGN Europe Energy, Banque des Territoires, Naval Energies, MHI Vestas
  • R&D Centres: IFREMER, ENSTA Bretagne, LBMS Brest.
  • Technology employed: Free floating platform (FFP), floating offshore wind turbine deployed in deep waters on a semi-submersible platform attached to the seabed with catenary cables (ease of maintenance).
  • Size & siting: Height of the multi-MW prototype: 203 m. Water depth: 60.
  • Output power: 28,5 MW.
  • Overall cost: €230 m. This project enjoys support from the French investment expenditure programme.
  • TIDAL TURBINE TEST SITE / CHANTIER BRETAGNE SUD

  • Goal: construct, install and qualify an industrial demonstrator.
  • Project developers: Guinard Energies (partners: Bernard Bonnefond, ENSTA Bretagne, IFREMER, etc.).
  • Technology employed: High-output ducted tidal turbine (doubles the power output), self-orients in the direction of the tidal stream; low weight-to-power output ratio and compactness making it efficient even in shallow waters (10 to 12 m depth), floating base that can be immersed and retrieved using ballast tanks (limiting operating costs).
  • Size: height on the seabed, 8 m.
  • Weight: 90 t (32 t without the base).
  • Output power: 350 kW.
  • Overall cost of the demonstration phase: €4.25 m (expected financing: 60% private funds and 40% public funds).
  • AUDIERNE WAVE TECHNOLOGIES

Possible test site for wave technologies with right wave conditions