Tidal turbine HydroQuest Ocean

The aim: install marine current turbine fields all around the world using HydroQuest technology

Hydrokinetic technology applied to tidal currents:

  • High worldwide potential: Marine hydrokinetic energy has an acknowledged worldwide potential of 100 GW, including 3 to 6 GW for France.
  • High power: tidal current speeds can reach or exceed 5 m/s.
  • Closeness to coast: strong currents often occur in shallow waters near coastlines, which makes turbine operation easier.
  • Predictability: tidal currents are wholly foreseeable, only depending on the relative position of the moon and the local topographical situation.

HydroQuest and CMN(Constructions Mécaniques de Normandie): a powerful partnership

  • In 2013, HydroQuest and Constructions Mécaniques de Normandie CMN, naval builders, joined forces to start building HydroQuest Ocean marine current turbines.
  • In 2016, the two companies won the ADEME competition “Energies Renouvelables en Mer” (Marine renewable energies).
  • In 2017, a demonstrator with a power output of 1 MW was installed on the EDF test site in Paimpol-Bréhat.
High yield: due to a set of crossflow turbines rotating about dual vertical axes.
Configuration with one or two levels
Dimensions and weight of units adapted to service boats
Robust system: All-metal construction for better resistance to impacts
Fixed-position bi-directional system: good yield without pitch or yaw
High sensitivity to current orientation
Recyclable materials
Alternators positioned outside current stream to avoid impairing the yield

Illustration of modular concept on same site

Each hydrokinetic turbine unit can feature one or two levels, measuring up to 20 m in height.

Marine current turbinesHydroQuest Oceanmultiple benefits

  • Excellent yield:
    – Guaranteed energy efficiency through unique HydroQuest Ocean hydrokinetic turbine technology: crossflow turbines rotate around dual vertical axes fixed in a metal casing with advanced fairings.
    – Two permanent magnet direct-drive alternators on the top of each column.


  • Adapts to variable depths of seabeds:
    – Units can feature one or two levels in the same farm: possible to install marine current turbines with different number of levels on the same farm, depending on the local topology.
    – Ease of operation due to installation near coast.
    – Units offer individual power output of 1 to 2 MW.


  • Highly robust system:– All-metal construction for better resistance to impacts.
  • Bidirectional operating system guaranteeing the unit remains immobile, unlike competitors:
    – The dual vertical axis means there is no need to orient the unit to capture the current stream
    – Excellent yield with no pitch or yaw
    – Very low sensitivity to current stream orientation
  • Dimensions and weight of turbine unit adapted to service boats built by CMN.
  • Recyclable materials.