Since mid-August, Hamburg’s port has hosted a new inland wind turbine whose rotor blades are nearly 60 meters long. BASF’s RELEST® coatings make a crucial contribution to the longevity of the turbine. They ensure high surface quality and protect the glass-fiber reinforced plastic rotor blades from enormous stresses brought about by weathering, erosion and UV radiation, for example. The turbine manufactured by Nordex has a 141-meter high tower. The tower’s height, which is extraordinary for Hamburg, makes it especially productive.
The N117/2400 turbine provides a container terminal at the port with up to 8.7 million kilowatt hours of electricity per year. This is equivalent to the annual energy needs of nearly 2,000 four-person households in Germany. The rule of thumb is, the higher the wind turbine’s tower, the greater the yield, which increases by 0.7 to 1 percent per meter of height. This means that the wind turbine’s height, which is above Hamburg´s average, will pay off in terms of both economic and ecological efficiency.
“In order for wind energy to pay off, it must be guaranteed that the turbines’ production will be efficient but also that it will have a service life of at least 20 years,” said Dr. Wolfgang Kranig, head of Postcoatings at BASF
. “For this reason, our paints are designed both to provide efficient coating and to fully protect the rotor blade surface from the enormous environmental stresses.” At speeds of up to 300 kilometers per hour at the blade tips, rain, snow and hail attack the surfaces, which can lead to erosion. In order for the rotor blades to be as aerodynamic as possible, the surface finish must also be smooth and flawless.