EUROS ships first 81.6m blade for 7-MW offshore turbine

Independent wind blade maker EUROS has delivered its first prototype 81.6m blade to Mitsubishi for use on a 7-MW offshore turbine.

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Three months after opening a new prototype production facility in Sassnitz/Mukran on the island of Rügen, Germany, independent wind blade designer and manufacturer EUROS delivers its first offshore blade to Mitsubishi.

The blade, 81.6m/268 ft and a mass of 32.5 tons will operate on Mitsubishi’s Sea Angel 7-MW offshore turbine with a rotor diameter of 167m/548 ft. The first operating sites will be located along the Scottish coast near Glasgow and in Fukushima, Japan.

The blade will be shipped to Fraunhofer IWES in Bremerhaven, Germany, where static and dynamic blade tests will be performed. The test loads represent the highest static and dynamic loads the blade will face in its 25 years lifetime and ensure that the structural design model and the manufacturing process comply with the calculations and verifications required for certification.

“The EUROS team is proud and satisfied with the successful delivery and shipment of the first offshore rotor blade,” says Dr. Michael Wolf, CEO of EUROS, in light of the first shipment. While the production facility in Sassnitz/Mukran was set up for the first prototype blade sets, EUROS plans to establish an offshore pre-series and series production in Rostock.

EUROS already gained experience through the production of 5-MW offshore blades in 2003 and 2006. In 2009, the company launched its own offshore blade development. Since then all aspects of rotor blade design, manufacturing, transport and maintenance were investigated in an extensive research and development program in cooperation with Mitsubishi. Wind tunnel tests were carried out to ensure the highest aerodynamic performance possible.

The blade’s load-carrying spar caps of carbon fiber composites and core materials previously only used in the aircraft industry provide the highest strength, stiffness and durability while maintaining the lowest mass possible. EUROS says all production processes were tailored to the highest manufacturing quality and the dimensions of one of the world’s largest rotor blades.

The company says the actual mass deviation from the target design value is less than 1 percent. This month EUROS will finish the expansion progress in Poland and increase its production capacity by fivefold. The maximum production capacity will be for rotor blades for wind turbines with up to 600 MW installed power per year.