Dresden 2011 – wissenschaftliches Programm

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MM: Fachverband Metall- und Materialphysik

MM 31: Postersitzung II

MM 31.10: Poster

Mittwoch, 16. März 2011, 17:15–18:45, P5

Material Test Facilities for Solar Absorber of Solar Tower Power Plants — Bernhard Hoffschmidt, Konstantin Konstantin Geimer, Oliver Kaufhold, and •Markus Sauerborn — Solar-Institut Jülich (SIJ), FH Aachen, Heinrich-Mußmann-Str. 5, D-52428 Jülich

Since 2009 the first and only German solar tower power plant the large scale test facility Solar Tower Juelich is in operation. The SIJ has initiated the construction phase and is now with the German Aerospace Center/DLR exclusive involved in the accompanying research. The central receiver plant features as central innovation an open volumetric receiver, consisting of porous ceramic elements that simultaneously absorb the concentrated sunlight and transfer the heat to ambient air passing through the pores so that an average temperature of 680°C is reached. The subsequent steam cycle generates up to 1.5MWe. To analyze the capability of new absorber specimen under realistic conditions or optimize the structures several special labor test facilities had been developed at the SIJ. An interesting one is using a powerful near-infrared radiator to simulate concentrated solar light. It offers a beam power of up to 300W/m* for test samples with a surface of about 14x14cm and the absorber surface can reach more than 1000°C. To suck ambient air through the open absorber - like on the tower - it is mounted on a special compressor system. An easy and quick change of the absorber specimen makes it possible to test new absorber structures fast and reproducible under various radiation conditions. An overview about the test facility and some results of the last years will be given.