J. Phys. IV France 09 (1999) Pr3-563-Pr3-568
Development and test of an end reflector for parabolic trough collectorsT. Fend1, J. León2, M. Böhmer1, P. Binner1, F. Deidewig1 and R. Kemme2
1 Deutsches Zentrum für Luft- und Raumfahrt e. V. (DLR), Solare Energietechnik, Linder Höhe, 51147 Köln, Germany
2 Plataforma Solar de Almería, Carretera de Senes s/n, 04200 Tabernas, Almería, Spain
Within the DLR-Project PAREX ( PArabolRinnen EXperiment) it could be shown by experiments and calculations, that collector efficiencies of parabolic troughs can be increased by up to 2% by means of the use of an end reflector, which is placed at the north end of each trough (in case of a north-south oriented plant at the northern hemisphere). Calculations show that the intensity of the incident concentrated radiation on the surface of the absorber increases by a factor of two. A first prototype of a 0,7 m2 end reflector was tested at the DLR in the PARMESAN (PAarbolRinnenMESsANlage) test facility. The radiation profile around the absorber was measured and compared to the calculated results. A second 6,4 m2 end reflector was designed and built up at the LS-3 test loop at the Plataforma Solar de Almería (PSA).
© EDP Sciences 1999