News Release from Senvion GmbH


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Company of the Day - Senvion: OWF Nordsee Ost offshore wind farm nears completion

Over Christmas, the last of the in total 48 wind turbines of the offshore wind farm Nordsee Ost was successfully installed around 30 km north the island Heligoland in the German Bight.

“We worked on the completion of the 48 wind turbines with two installation vessels at the same time and, besides the conventional rotor star installation, the rotor blades of the 6 MW turbines have also been attached to the hub individually for the first time at sea,” explains Marcel Sunier, Project Director for the Nordsee Ost wind farm at RWE Innogy. “We were able to successfully complete the turbine installation over Christmas after only seven months. All our attention now is on the commissioning. The goal is to connect the wind power units to the grid one by one and ensure complete operational readiness of all turbines by the coming spring. The first wind turbine has commenced trial operation in the past few days and is already feeding its green electricity into the grid.”

The installation of the 48 wind turbines took place from the base port in Bremerhaven. Like the foundations, the tower segments, nacelles and rotor blades were also stored, pre-assembled and loaded on the installation vessels “Victoria Mathias” and “Friedrich Ernestine” at the Eurogate Container Terminal. The individual components of the 6 MW turbines from Senvion impress through their huge dimensions: With around 160 m from sea level to the tip of the blade, the wind turbine stands higher than Cologne Cathedral. The nacelle has a weight of approx. 350 tonnes and the dimensions of a detached house. The tower consisting of two individual segments is in total over 70 m long and weighs over 240 tonnes. The individual rotor blades are 60 m long and weigh approx. 23 tonnes. This equates to the weight of about six fully-grown elephants.

After completion and start of commercial operations in the coming spring, the Nordsee Ost offshore wind farm will have installed power of around 295 MW and supply the equivalent of around 320,000 households with electricity.

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Senvion SE
Edited by Trevor Sievert, Online Editorial Journalist / by Senvion Staff

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