NENUPHAR was founded in 2006 to design, fabricate, and sell vertical axis floating wind turbines. It has over 40 employees based in France and has developed the largest onshore vertical turbine in the world, in operation since 2014. In April 2014, AREVA acquired a minority share in NENUPHAR to provide technical and operational support for developing floating wind turbine solutions. NENUPHAR's technology uses vertical axis wind turbines on spar-type floating foundations to access winds farther offshore where bottom-fixed turbines are not viable and to reduce impacts on the environment. Prototypes developed from 2009-2015 helped optimize the turbine design for competitive offshore floating wind farms planned from 2017-2020.

1. • NENUPHAR was founded in 2006 for the design, fabrication and sales of vertical axis
floating wind turbines.
• More than 40 people ( based in Lille, Aix en Provence and Paris)
• Largest onshore vertical turbine in the world in operation since 2014
• In April 14, together with BPI France, AREVA acquired a minority share and also
providing technical and operational support for the development of the solution.
Onshore prototype
Offhore prototype
Pilot wind farm 25MW
Next Generation
Floating wind
turbines
2014 - 2016 2016 - 2017 2017 - 2020 2020 - 2030
Nenuphar Presentation

2. Nenuphar’s technology
Why floating wind turbines?
• Floating wind turbines can be installed
far from land, by more than 50m
depths, where bottom-fixed offshore
wind turbines are not competitive :
– It opens new market opportunities
– The turbines can be located where the
wind is stronger and more regular
– Where they will have less impact on
landscape and environment

3. Nenuphar’s technology
Why Vertical axis?
Vertical axis technology is more
adapted to floating wind turbines :
 The vertical axis wind turbine vertical
architecture can support tilt angles
under operation in order to reach
economical size of floater
 High tilt
 Low center of gravity
 High Aerodynamic dumping level
 The rotor do not need to face the
wind with a yaw mechanism
 Equipments are located directly in
the pylon enabling simplified heavy
maintenance procedure adapted to
offshore operation
Wind
Vertical AxisHorizontal Axis
Blades Blades
Drive
Pylon
Yaw
Larger tilt allowed

4. Nenuphar’s technology
• Why a Spar floater?
– A Spar Floater can easily tilt, which
improves the performance of the
vertical axis wind turbine
– Disconnectable turbine concept allows
to do full turbine installation,
commissioning and heavy maintenance
at quay
– A spar floater limits vertical movements
due to waves so the turbine can be
saved from premature fatigue damages

5. Design evolution
Design Concept initial (2009) INFLOW (2011) Basic Design (2015)
Objectives : Optimize the turbine in order to have a competitive product
Onshore proto (2014)
The feed back of the different prototypes allows Nenuphar to optimize the design of
the wind turbine.
The main target is to have a competitive product.

6. Prototype and code validation
Nenuphar has the largest H-rotor
prototype, running successfully since 2014,
with 1250 m2 of swept area (50m
diameter and 25m blades)
40 specialists dedicated to the product
development,
Unique codes and models now enable the
development of full scale floating machines
Offshore prototype will be commissionned
and installed offshore in 2016