Borkum West II Offshore Wind Farm
Fabrication of WTG sea-fastenings and rotor star tower structure
MPI Offshore were awarded the contract to carry out the installation of the Wind Turbine Generators (WTGs) for this project using the vessel MPI Adventure. MCC were in turn awarded the contract to fabricate and install the sea-fastening components for this most demanding and innovative project.
German utility company Trianel Windkraftwerk Borkum GmbH & Co. KG developed the project at an estimated cost of €1bn. The venture is expected to generate 1,200GWh annually to power nearly 250,000 households.
The turbines stand approximately 148m high. Certainly an impressive feat of engineering considering Nelson’s Column in London reaches to just under 52m and the tower that houses Big Ben is 96.3m high. At 135m the London Eye would even be dwarfed by these incredible structures.
The WTG rotor diameter spans 116m and the trio of blades (rotor star) was constructed on land before being loaded out for installation at the offshore site.
The most striking component of this project was the Rotor Blade Tower structure which would eventually house 3No. Areva M5000 Rotor Star Assemblies.
The complex geometry and tight space restrictions required during load out and installation provided a particular challenge as a result of the onerous installation tolerances demanded.
A complex guiding system was also installed by MCC to rotate the horizontal blades into the correct orientation for transit to the field.