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04.04.2018 09:37

Wind energy: Preparing rotor blades for rain

Rüdiger Mack Marketingkommunikation
FIZ Karlsruhe – Leibniz-Institut für Informationsinfrastruktur GmbH

    Every day, the rotor blades on a wind turbine collide with raindrops, hail or grains of sand. Over time, these impacts leave traces on the blade and material erosion begins. The BINE-Projektinfo brochure "Rain can damage rotor blades" (14/2017) presents research results on this gradual material destruction. The underlying mechanisms of this type of erosion are being researched on a new test stand. The aim is to improve the protection and economic efficiency of rotor blades.

    Weather and manufacturing defects cause material erosion

    The research project focused on the design, structure and construction of the test stand. It is made of a steel-reinforced concrete shell and is 4.5 m high. On top, a rain generator produces water drops. Droplet size can vary between 1 and 5 mm, and the amount of water can vary between 6 and 24 l/min. Inside the system, a sample body rotates on a carrier device with a diameter of 2.8 m. The samples can be accelerated at variable speeds—with peak speeds of up to 600 km/h—in a circular path. The water is gathered after impact and material eroded from the samples is filtered out. Various microscopes and scanners are used to determine the exact damage patterns. The test stand is able to simulate characteristic weather and climate conditions for offshore, coastal and low mountain locations.

    Rain erosion has many causes, such as rainfall, hail, UV light, the build-up of ice and temperature fluctuations; it is not a linear process. The Fraunhofer Institute for Wind Energy and Energy System Technology (IWES) in Bremerhaven is operating the test stand and conducting the research.

    You found all informations about the BINE Projectinfo brochure entitled "Rain can damage rotor blades" here:

    Uwe Milles/Birgit Schneider

    About BINE Information Service

    Energy research for practical applications

    The BINE Information Service reports on energy research topics, such as new materials, systems and components, as well as innovative concepts and methods. The knowledge gained is incorporated into the implementation of new technologies in practice, because first-rate information provides a basis for pioneering decisions, whether in the planning of energy-optimised buildings, increasing the efficiency of industrial processes, or integrating renewable energy sources into existing systems.

    About FIZ Karlsruhe

    FIZ Karlsruhe – Leibniz Institute for Information Infrastructure is a not-for-profit organization with the public mission to make sci-tech information from all over the world publicly available and to provide related services in order to support the national and international transfer of knowledge and the promotion of innovation.
    Our business areas:
    • STN International – the world’s leading online service for research and patent information in science and technology
    • KnowEsis – innovative eScience solutions to support the process of research in all its stages, and throughout all scientific disciplines
    • Databases and Information Services – Databases and science portals in mathematics, computer science, crystallography, chemistry, and energy technology
    FIZ Karlsruhe is a member of the Leibniz Association (WGL) which consists of 87 German research and infrastructure institutions.

    Weitere Informationen: - BINE Informationsdienst

    Merkmale dieser Pressemitteilung:
    Journalisten, Lehrer/Schüler, Studierende, Wirtschaftsvertreter, Wissenschaftler
    Bauwesen / Architektur, Energie, Umwelt / Ökologie
    Forschungsergebnisse, Forschungsprojekte

    The BINE-Projektinfo brochure "Rain can damage rotor blades"

    Zum Download



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