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Wind turbines are getting increasingly bigger, which increases the loads acting on the rotor blades. Existing designs are, however, reaching their limits. So-called smart blades on the other hand respond passively or with active components to changing wind conditions. The new BINE Projektinfo brochure entitled "The smarter blade gives in" presents three different technologies.
Flexible rotor blades make wind turbines more efficient
Passive smart blades can not only bend but also twist axially when the wind is strong. This changes the flow angle, which in turn automatically counteracts the load change. The investigations by the scientists have shown that flexible, 80-metre-long sickle-shaped blades are particularly ideal for this purpose. A special arrangement of the fibres in the rotor blade interior supplements this approach. Here the fibre layers are laid not only in the longitudinal direction but also diagonally from the leading to the trailing edge of the blade.
Active smart blades achieve the same effect with the help of flexible parts or adjustable flaps. Project manager Dr Jan Teßmer from the German Aerospace Centre (DLR) explains: "Active elements generally have to be maintained more intensively, so the mechanisms for smart blades have to be robust and economical." An example of this is provided by rear edge flaps. The moving parts are controllable and regulate the loads on each blade individually and locally. Integrated leading edge slats respond quickly to aerodynamic forces during turbulent inflows. The scientists tested these among others in wind tunnel experiments.
In a next step, the researchers will test the various concepts in field experiments. The research project was led by the German Aerospace Centre.
You found all informations about the BINE Projektinfo brochure entitled "The smarter blade gives in" here:
http://www.bine.info/en/press/press-releases/press/pressemitteilung/intelligent-...
Uwe Milles/Birgit Schneider
presse(at)bine.info
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.
http://www.bine.info/en - BINE Informationsdienst
The BINE Projektinfo brochure entitled "The smarter blade gives in"
© BINE Informationsdienst
None
The overview shows the three investigated and developed technologies.
© DLR
None
Merkmale dieser Pressemitteilung:
Journalisten, Lehrer/Schüler, Studierende, Wirtschaftsvertreter, Wissenschaftler
Elektrotechnik, Energie, Maschinenbau, Umwelt / Ökologie
überregional
Forschungsergebnisse, Forschungsprojekte
Englisch
The BINE Projektinfo brochure entitled "The smarter blade gives in"
© BINE Informationsdienst
None
The overview shows the three investigated and developed technologies.
© DLR
None
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