The following challenges have been overcome through close cooperation between

LM Wind Power and Alstom Wind in the design phase of the Haliade 150 – 6MW

wind turbine:

• Advanced control strategies together with Blade Monitoring System allow:

10% reduction of loads and blade deflection

26Tn blade mass

3.2m blade root diameter

• Wind turbine and blade geometry optimization allow maximum blade deflection

without compromising the functionality and manufacturability of the complete

wind turbine:

This poster presents the latest development of a very large rotor dedicated to the

Haliade 150 – 6MW, a new generation of offshore wind turbine.

Fiber reinforced polyester blade technology has been pushed to a next level to

create a blade for offshore application of a challenging 73.5m length without using

carbon:

• Technology with strong track record

• Reduction of the entire wind turbine cost

• Reduction of the risks in the manufacturability

• Improvement of the protection against lightning

Blade geometry, including high performance thick airfoils and blade root

aerodynamic devices, has been optimized for a balance between wind turbine

loads and wind park performance: the Haliade 150 - 6MW wind turbine reaches

high capacity factors and at the same time produces a low thrust to minimize the

loss of energy in the wind park cluster.

Introduction

Large rotor development for a new generation 6MW

offshore wind turbine D. Miguel, L. Feigl

Alstom Wind N. Toft, P. Hansen

LM Wind Power

PO.

137

Key Design Challenges

Conclusions

EWEA OFFSHORE 2011, 29 November – 1 December 2011, Amsterdam, The Netherlands

• Advanced thick airfoils along the blade span to guarantee good aerodynamic

performances with high bending stiffness:

Optimized for high lift to drag ratio

Optimized for high energy yield with reinforcement of aerodynamic devices

Reduction of loads thanks to a balance between optimum cL and maximum cL

Standard NACA 18% relative thickness vs. LM 24% rellative thickness airfoils

LM 73.5 Blade

Haliade 150 – 6MW wind turbine

LM 73.5 blade vortex

LM 73.5 blade T-spoiler