Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

Fraunhofer IWES ready for testing XXL rotor blades

10.06.2011
A ceremony on Thursday 9th June marked the official opening of the 90 meter test stand for rotor blades at Fraunhofer IWES.

The construction work took one and half years and the new 20,000 square meter facility doubles the existing capacity for testing complete rotor blades. A tiltable mounting block allows full bending of the blade tips, even for very long rotor blades, and also facilitates the mounting process. The new building represents an investment of 11 million euros and will make a key contribution to assuring the quality of rotor blade prototypes.


Long, longer, the longest: the new test stand allows rotor blade testing on a new scale.
Wolfhard Scheer


Engineer at the manway - this is the point where the rotor blade is mounted on the fixing block.
Falko Bürkner, Fraunhofer IWES

A test facility for heavy loads on sandy soil directly at the water’s edge – this was the starting situation for an extraordinary challenge. When the 200 foundation piles were positioned in January 2010 shortly after the first spade of soil was removed, the construction site looked like the excavation works for an ancient temple. A mounting block weighing 1000 metric tons and load transference of up to 500 kN per load point, which is applied to the rotor blade during testing, make this structure necessary.

Fraunhofer IWES has built a unique testing facility at its site in Bremerhaven that allows rotor blade prototypes to be subjected to very realistic loads. The facility was funded by the Federal Ministry for the Environment, Nature Conservation and Nuclear Safety (BMU), the Fraunhofer-Gesellschaft, the State of Bremen, and the European Fund for Regional Development (EFRD). The rotor blade tests deliver, in accordance with IEC requirements, meaningful statements in just a few months about whether a rotor blade can withstand a service life of 20 years undamaged. Compared to the existing testing hall for 70 meter blades, which has been in operation since 2009 and is already operating at full capacity, the new facility not only provides the space for very long rotor blades to be tested but also features a tiltable mounting block.

As this huge steel block can assume an angle of tilt of up to 20 degrees, the tips of even very large blades can be bent by 30 meters. The block also facilitates the mounting of the rotor blades. With the ability to test rotor blades that are, for example, being designed for large 10 MW wind turbines, Fraunhofer IWES is well equipped for the future: “This 90 meter test facility will certainly see us through the coming years and takes into account the current trend towards large rotor blades“, says Prof. Dr. Andreas Reuter, Director of the Fraunhofer IWES in Bremerhaven. Instead of having large generators, the focus will be on larger rotors. This will allow more hours of operation at full load and this is the reason for the change in emphasis, explains Reuter. The main challenge here is to realize aerodynamic efficiency without notable extra weight and additional costs.

The requirements of industry have been taken into account in the design of the test stand: A steering committee, comprising representatives from industry, have supervised the project from the initial planning stage right through to the operational phase. For example, new combinations of materials and new rotor blade designs can now be tested before they are taken into series production. This work is often also undertaken via publicly funded research projects. “We are developing innovative testing and monitoring methods that demonstrate to customers how rotor blades perform under realistic loads,” explains Dr. Arno van Wingerde, Head of the Competence Center for Rotor Blades at Fraunhofer IWES.

The first test began just a few days after the celebration to mark the start-up of operations. As the new test stand is already in high demand, the next expansion step is not long away: This autumn another mounting block will be installed in the 90 meter testing hall.

Britta Rollert | Fraunhofer-Institut
Further information:
http://www.iwes.fraunhofer.de

Further reports about: IWES XXL rotor blade rotor blade prototypes test facility wind turbine

More articles from Power and Electrical Engineering:

nachricht Silicon solar cell of ISFH yields 25% efficiency with passivating POLO contacts
08.12.2016 | Institut für Solarenergieforschung GmbH

nachricht Robot on demand: Mobile machining of aircraft components with high precision
06.12.2016 | Fraunhofer IFAM

All articles from Power and Electrical Engineering >>>

The most recent press releases about innovation >>>

Die letzten 5 Focus-News des innovations-reports im Überblick:

Im Focus: Electron highway inside crystal

Physicists of the University of Würzburg have made an astonishing discovery in a specific type of topological insulators. The effect is due to the structure of the materials used. The researchers have now published their work in the journal Science.

Topological insulators are currently the hot topic in physics according to the newspaper Neue Zürcher Zeitung. Only a few weeks ago, their importance was...

Im Focus: Significantly more productivity in USP lasers

In recent years, lasers with ultrashort pulses (USP) down to the femtosecond range have become established on an industrial scale. They could advance some applications with the much-lauded “cold ablation” – if that meant they would then achieve more throughput. A new generation of process engineering that will address this issue in particular will be discussed at the “4th UKP Workshop – Ultrafast Laser Technology” in April 2017.

Even back in the 1990s, scientists were comparing materials processing with nanosecond, picosecond and femtosesecond pulses. The result was surprising:...

Im Focus: Shape matters when light meets atom

Mapping the interaction of a single atom with a single photon may inform design of quantum devices

Have you ever wondered how you see the world? Vision is about photons of light, which are packets of energy, interacting with the atoms or molecules in what...

Im Focus: Novel silicon etching technique crafts 3-D gradient refractive index micro-optics

A multi-institutional research collaboration has created a novel approach for fabricating three-dimensional micro-optics through the shape-defined formation of porous silicon (PSi), with broad impacts in integrated optoelectronics, imaging, and photovoltaics.

Working with colleagues at Stanford and The Dow Chemical Company, researchers at the University of Illinois at Urbana-Champaign fabricated 3-D birefringent...

Im Focus: Quantum Particles Form Droplets

In experiments with magnetic atoms conducted at extremely low temperatures, scientists have demonstrated a unique phase of matter: The atoms form a new type of quantum liquid or quantum droplet state. These so called quantum droplets may preserve their form in absence of external confinement because of quantum effects. The joint team of experimental physicists from Innsbruck and theoretical physicists from Hannover report on their findings in the journal Physical Review X.

“Our Quantum droplets are in the gas phase but they still drop like a rock,” explains experimental physicist Francesca Ferlaino when talking about the...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

Event News

ICTM Conference 2017: Production technology for turbomachine manufacturing of the future

16.11.2016 | Event News

Innovation Day Laser Technology – Laser Additive Manufacturing

01.11.2016 | Event News

#IC2S2: When Social Science meets Computer Science - GESIS will host the IC2S2 conference 2017

14.10.2016 | Event News

 
Latest News

Researchers identify potentially druggable mutant p53 proteins that promote cancer growth

09.12.2016 | Life Sciences

Scientists produce a new roadmap for guiding development & conservation in the Amazon

09.12.2016 | Ecology, The Environment and Conservation

Satellites, airport visibility readings shed light on troops' exposure to air pollution

09.12.2016 | Health and Medicine

VideoLinks
B2B-VideoLinks
More VideoLinks >>>