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

Meiser, Siw and Kleine-Blüning, Christoph and Uhlig, Ralf and Lüpfert, Eckhard and Schirike, Björn (2012) Finite Element Modeling of Parabolic Trough Mirror Shape in Different Mirror Angles. In: ESFuelCell2012-91264. ASME. ASME 2012 6th International Conferenc on Energy Sustainability ESFuelCell2012, 23.-26. Juli 2012, San Diego, USA.

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Abstract

Deviations from the ideal shape of reflector panels for parabolic trough solar power plants have relevant impact o 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 soar parabolic torugh collectors and identifying optimizatio potetial of the mirror panels. Two mirror model versions (stiff and elastic supports) are evaluatioed in four angles: in horizontal laboratory angle (mirrors facing upward with mounting points horizontally aligned), and in 0°, 45° and 90° collector angle. The resulting slope maps are calculated in a separate post-processing. In order to evaluate the effect of gravity load on mirror shape, the deformed mirror in each evaluated angle is compared to the non-deformed mirror shape, and to the shapes in 0° (zenith( collector angle, respectively. the resulting slope deviation maps show the mirror deformation in different mirror angles. Stiffness of themounting to the support structure has a relevant impact. Mirror deforamtion 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/78606/
Document Type:Conference or Workshop Item (Paper)
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-Blüning, ChristophDLR SF-QNUNSPECIFIED
Uhlig, RalfUNSPECIFIEDUNSPECIFIED
Lüpfert, EckhardDLR SF-QNUNSPECIFIED
Schirike, BjörnDLR SF-QNUNSPECIFIED
Date:23 July 2012
Journal or Publication Title:ESFuelCell2012-91264
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Publisher:ASME
Status:Published
Keywords:parabolic trough, mirror shape, gravity-induced deformation,
Event Title:ASME 2012 6th International Conferenc on Energy Sustainability ESFuelCell2012
Event Location:San Diego, USA
Event Type:international Conference
Event Dates:23.-26. Juli 2012
Organizer:ASME
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:06 Dec 2012 17:18
Last Modified:12 Dec 2013 21:51

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