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Structural Optimization of a Line-Focussing Solar Collector With Stationary Absorber Tube

Prahl , Christoph und Schapitz, Tamara und Uhlig, Ralf (2011) Structural Optimization of a Line-Focussing Solar Collector With Stationary Absorber Tube. 17th SolarPACES Conference, 20. - 23. September 2011, Granada/Spain.

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A preliminary study on a line concentrating solar collector with stationary absorber tube has revealed significant cost reduction and performance enhancement compared to state-of-the-art Parabolic Trough Collectors. To decide whether this so called Fixed Focus Parabolic Trough concept is worth continuing, a pre-design of the concentrator structure for such a collector must be investigated. In this paper, the effects of operating conditions represented by wind forces and dead load on the shape accuracy of the concentrator are determined via finite element method (FEM). An optimization procedure written in ANSYS is applied to determine appropriate geometry and dimensions of the structure to obtain best optical performance at lowest material consumption. To maintain a mean focus deviation of the reflected rays from the focal line of less than 6 mm under operating conditions, a specific weight of 14 kg/m2 could be reached. As structural elements of the collector are located between mirror and absorber, ray tracing analysis is performed for one selected conceptual design to estimate the effects of blocking and shading on the optical performance. The ray tracing revealed a reduction of the optical performance due to blocking and shading of 27 % for an incidence angle of 45° compared to 0° incidence angle.

Dokumentart:Konferenzbeitrag (Vortrag, Paper)
Titel:Structural Optimization of a Line-Focussing Solar Collector With Stationary Absorber Tube
AutorenInstitution oder E-Mail-Adresse der Autoren
Prahl , Christophchristoph.prahl@dlr.de
Referierte Publikation:Ja
Stichwörter:line-concentrating solar collector, stationary absorber tube, optimization, FEM, ray tracing
Veranstaltungstitel:17th SolarPACES Conference
Veranstaltungsart:internationale Konferenz
Veranstaltungsdatum:20. - 23. September 2011
Veranstalter :SolarPACES
HGF - Forschungsbereich:Energie
HGF - Programm:Erneuerbare Energie
HGF - Programmthema:E SF - Solarforschung (alt)
DLR - Schwerpunkt:Energie
DLR - Forschungsgebiet:E SF - Solarforschung
DLR - Teilgebiet (Projekt, Vorhaben):E - Applikationsentwicklung (alt)
Standort: Köln-Porz
Institute & Einrichtungen:Institut für Solarforschung
Hinterlegt von: Christoph Prahl
Hinterlegt am:15 Dez 2011 14:25
Letzte Änderung:26 Jul 2013 17:57

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