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Windtech International May June 2024 issue

 

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Thialf installs 1st wind turbine using RNA method Arcadis Ost 1 300 200Heerema, Vestas and Parkwind have completed its first wind turbine installation using a floating installation method. The first out of the 27 Vestas V174 – 9.5MW turbines has successfully been installed at the Arcadis Ost 1 wind farm. The plan to use a floating installation method for Arcadis Ost 1 was announced for the first time in November 2019.
 
To speed up the installation process, assembly and lifting operations are happening in parallel. One of the Thialf’s two main cranes lifts the pre-assembled WTG-tower to the foundation, whilst the second main crane is used to pre-assemble the WTG in parallel. For the latter, Heerema developed a method where the Rotor Nacelle Assembly (RNA) lift takes place on a so-called “support” tower on board of the crane vessel. The support tower provides a stable platform to allow a fast and secure assembly of the nacelle and the blades. Once pre-assembled the complete RNA is lifted as one piece onto the WTG tower in only one lift.
 
The installation campaign has started in June 2022 and wind farm’s final commissioning is planned in 2023. The Arcadis Ost 1 is a 257 MW wind farm developed by Parkwind, located in the German territorial waters of the Baltic Sea, northeast of the island of Rügen.
 
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