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 Electron sandwich doubles thermoelectric performance
20.06.2018 | Hokkaido University

nachricht Agrophotovoltaics Goes Global: from Chile to Vietnam
20.06.2018 | Fraunhofer-Institut für Solare Energiesysteme ISE

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: Temperature-controlled fiber-optic light source with liquid core

In a recent publication in the renowned journal Optica, scientists of Leibniz-Institute of Photonic Technology (Leibniz IPHT) in Jena showed that they can accurately control the optical properties of liquid-core fiber lasers and therefore their spectral band width by temperature and pressure tuning.

Already last year, the researchers provided experimental proof of a new dynamic of hybrid solitons– temporally and spectrally stationary light waves resulting...

Im Focus: Overdosing on Calcium

Nano crystals impact stem cell fate during bone formation

Scientists from the University of Freiburg and the University of Basel identified a master regulator for bone regeneration. Prasad Shastri, Professor of...

Im Focus: AchemAsia 2019 will take place in Shanghai

Moving into its fourth decade, AchemAsia is setting out for new horizons: The International Expo and Innovation Forum for Sustainable Chemical Production will take place from 21-23 May 2019 in Shanghai, China. With an updated event profile, the eleventh edition focusses on topics that are especially relevant for the Chinese process industry, putting a strong emphasis on sustainability and innovation.

Founded in 1989 as a spin-off of ACHEMA to cater to the needs of China’s then developing industry, AchemAsia has since grown into a platform where the latest...

Im Focus: First real-time test of Li-Fi utilization for the industrial Internet of Things

The BMBF-funded OWICELLS project was successfully completed with a final presentation at the BMW plant in Munich. The presentation demonstrated a Li-Fi communication with a mobile robot, while the robot carried out usual production processes (welding, moving and testing parts) in a 5x5m² production cell. The robust, optical wireless transmission is based on spatial diversity; in other words, data is sent and received simultaneously by several LEDs and several photodiodes. The system can transmit data at more than 100 Mbit/s and five milliseconds latency.

Modern production technologies in the automobile industry must become more flexible in order to fulfil individual customer requirements.

Im Focus: Sharp images with flexible fibers

An international team of scientists has discovered a new way to transfer image information through multimodal fibers with almost no distortion - even if the fiber is bent. The results of the study, to which scientist from the Leibniz-Institute of Photonic Technology Jena (Leibniz IPHT) contributed, were published on 6thJune in the highly-cited journal Physical Review Letters.

Endoscopes allow doctors to see into a patient’s body like through a keyhole. Typically, the images are transmitted via a bundle of several hundreds of optical...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

VideoLinks
Industry & Economy
Event News

Munich conference on asteroid detection, tracking and defense

13.06.2018 | Event News

2nd International Baltic Earth Conference in Denmark: “The Baltic Sea region in Transition”

08.06.2018 | Event News

ISEKI_Food 2018: Conference with Holistic View of Food Production

05.06.2018 | Event News

 
Latest News

Creating a new composite fuel for new-generation fast reactors

20.06.2018 | Materials Sciences

Game-changing finding pushes 3D-printing to the molecular limit

20.06.2018 | Materials Sciences

Could this material enable autonomous vehicles to come to market sooner?

20.06.2018 | Materials Sciences

VideoLinks
Science & Research
Overview of more VideoLinks >>>