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6/9/2013 | 1 MINUTE READ

DIAB core going into 83.5m long wind turbine blade

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DIAB's ProBalsa150 and Divinycell H80 have been used in the manufacture of an 83.5m offshore wind blade, produced by SPP Technology and Samsung Heavy Industries.

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Core manufacturer DIAB (Laholm, Sweden) reports that it's material is being used in the fabrication of the an 83.5m/274-ft wind turbine blade, said to be the world's largest. A joint project between SPP Technology and Samsung Heavy Industries, the first prototype blade is currently exposed to thorough testing at the Fraunhofer Institute in Germany.

The record-­breaking turbine blade is part of a project to develop a 7-MW offshore wind turbine with a 171.2m/562-ft diameter rotor. The new design will be used in the construction of 12 units in an 84-MW offshore installation in the Korea Straits. A collaboration between Samsung and the Korea Southern Power Corp., the installation is targeted to start in 2015, making it South Korea's first offshore wind energy project. Commissioned by Samsung Heavy Industries, the first prototype for the blade was designed and manufactured by SSP Technology. 

When developing the geometry for the extraordinary large blade SSP Technology used aerodynamic and 3-D CAD modeling. It was finally decided that the blade would be constructed using a flat­back profile at the maximum corde and a structural blade design concept of a carbon and glass fiber hybrid, materials able to provide the necessary strength, buckling and deflection resistance.

Having worked with DIAB for many years prior to this project, SSP Technology's CTO Flemming Sørensen called on DIAB again to supply all core materials used: ProBalsa150 and Divinycell H80. Each blade skin was produced in a female mold using a combination of VARTM (vacuum assisted resin transfer moulding), pre­preg and hand lamination.

With support from DIAB and within the requested 15 months and targeted budget, SSP Technology was able to produce the first complete prototype at the company's production site in Denmark. The blade was then transported to the Fraunhofer Institute for Wind Energy and Energy System Technology (IWES) in Bremerhaven, Germany, where it is currently undergoing testing and evaluation to prove the quality of the blade, including the SSP spar box and the root design developed by SSP Technology.


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