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Green Hydrogen H2 News

Nezzy² floating wind turbine passes second test

Anela DoksoBy Anela Dokso03/11/20202 Mins Read
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The floating wind turbine Nezzy², being tested jointly by the north German company aerondyn engineering and EnBW, has passed its two-month test in the Bay of Greifswald.

The 18-metre-tall prototype built on a 1:10 scale consists of two wind turbines on a floating platform.

In the Bay of Greifswald, 180 sensors were used in 30 different measurements to establish how Nezzy² behaves when exposed to different wind directions and speeds as well as wave heights and directions.

Scaled up to the later true size of Nezzy², the wave and wind conditions were equivalent to a category four to five hurricane with waves reaching heights of up to 30 meters.

“For one and a half days, we were able to observe how Nezzy² remained stable in the water in extreme weather conditions. Our tests have shown that our model is now ready to be tested in the sea on a full-size scale.”

aerodyn managing director Sönke Siegfriedsen.

Prior to the test in the Baltic Sea, Nezzy² was tested in a flooded gravel pit in Bremerhaven.

Until now, offshore wind turbines have been anchored to the seabed with solid foundations at a maximum water depth of 50 meters. With floating wind turbines, new countries and sea regions at greater depths can now be considered.

“We want to use the floating wind turbines ourselves for our international offshore projects. That is why we are really delighted that this technology can now be further developed with our support.”

Hannah König, head of wind and maritime technology at EnBW.

The 1:10 scale model has now been dismantled. Over the coming weeks, the recorded data will be evaluated. The findings will then be incorporated in the design of the 1:1 scale model, which is set to be tested in China at the end of 2021 or start of 2022.

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