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Finite Element Modeling of Parabolic Trough Mirror Shape in Different Mirror Angles

Meiser, Siw and Kleine-Büning, Christoph and Uhlig, Ralf and Lüpfert, Eckhard and Schiricke, Björn and Pitz-Paal, Robert (2013) Finite Element Modeling of Parabolic Trough Mirror Shape in Different Mirror Angles. Journal of Solar Energy Engineering, 135 (031006). American Society of Mechanical Engineers (ASME). DOI: 10.1115/1.4023560 ISSN 0199-6231

Full text not available from this repository.

Abstract

Deviations from the ideal shape of reflector panels for parabolic trough solar power plants can have relevant impact on field efficiency and thus on the performance of the whole power plant. Analyzing the gravity-induced deformation of mirror shape for different mirror angles is relevant for performance calculation of solar parabolic trough collectors and identifying optimization potential of the mirror panels. Two mirror model cases (stiff and elastic supports) are evaluated in four angles: in horizontal laboratory angle (mirrors facing upward with mounting points horizontally aligned), and in 0 deg, 45 deg, and 90 deg collector angle. The resulting slope maps are calculated in a separate postprocessing. In order to evaluate the effect of gravity load on mirror shape, the deformed mirror in each evaluated angle is compared to the nondeformed mirror shape, and to the shapes in 0 deg (zenith) collector angle, respectively. The resulting slope deviation maps show the mirror deformation in different mirror angles. Stiffness of the mounting to the support structure has a relevant impact. Mirror deformation on elastic brackets (SDx up to 1.6 mrad) is much more pronounced than on an ideal stiff support structure (SDx up to 1.0 mrad).

Item URL in elib:https://elib.dlr.de/85880/
Document Type:Article
Title:Finite Element Modeling of Parabolic Trough Mirror Shape in Different Mirror Angles
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Meiser, SiwSiw.Meiser (at) dlr.deUNSPECIFIED
Kleine-Büning, Christophchristoph.kleine-buening (at) dlr.deUNSPECIFIED
Uhlig, Ralfralf.uhlig (at) dlr.deUNSPECIFIED
Lüpfert, EckhardEckhard.Luepfert (at) dlr.deUNSPECIFIED
Schiricke, Björnbjoern.schiricke (at) dlr.deUNSPECIFIED
Pitz-Paal, Robertrobert.pitz-paal (at) dlr.deUNSPECIFIED
Date:August 2013
Journal or Publication Title:Journal of Solar Energy Engineering
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In SCOPUS:Yes
In ISI Web of Science:Yes
Volume:135
DOI :10.1115/1.4023560
Publisher:American Society of Mechanical Engineers (ASME)
ISSN:0199-6231
Status:Published
Keywords:mirror shape, deformation, collector angle, finite element modeling, parabolic trough
HGF - Research field:Energy
HGF - Program:Renewable Energies
HGF - Program Themes:Concentrating Solar Systems (old)
DLR - Research area:Energy
DLR - Program:E SF - Solar research
DLR - Research theme (Project):E - Qualifizierung (old)
Location: Köln-Porz
Institutes and Institutions:Institute of Solar Research > Qualifizierung
Deposited By: Kruschinski, Anja
Deposited On:04 Dec 2013 16:46
Last Modified:08 Mar 2018 18:45

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