elib
DLR-Header
DLR-Logo -> http://www.dlr.de
DLR Portal Home | Impressum | Datenschutz | Kontakt | English
Schriftgröße: [-] Text [+]

Analysis of parabolic trough concentrator mirror shape accuracy in different measurement setups

Meiser, Siw und Lüpfert, Eckhard und Schiricke, Björn und Pitz-Paal, Robert (2014) Analysis of parabolic trough concentrator mirror shape accuracy in different measurement setups. Energy Procedia (49), Seiten 2135-2144. Elsevier. doi: 10.1016/j.egypro.2014.03.226. ISSN 1876-6102.

[img] PDF (Analysis of parabolic trough concentrator mirror shape)
1MB

Kurzfassung

common measurement systems proving the high quality of state-of-the-art mirror panels. However, measurement results cannot always be compared directly because critical boundary conditions are not yet standardized. This paper quantifies the differences in shape accuracy results between the most common measurement setups for parabolic trough mirror panels and identifies measurement position, mounting mode and support frame employed for the measurement as relevant boundary conditions. Deflectometric measurements of mirror panels of RP3 geometry were performed at DLR’s QUARZ Center Cologne in vertical (mounting points vertically and curved direction horizontally aligned) and horizontal measurement position (mirrors facing upward with mounting points horizontally aligned), both with and without tightening the mirrors to a support frame with screws. Finite element models were applied to calculate gravity-induced deformation and resulting slope and focus deviation on three different types of support frame: an ideally rigid support frame, a laboratory support frame, and an ideal support frame with elastic brackets. The measurement results demonstrate that the difference in position and mounting mode can lead to relevant deviations of the shape accuracy results higher than the uncertainty of the employed deflectometric measurement system. For RP3 inner mirror panels a difference of up to 0.7 mrad in root mean square slope deviation (SDx) and 3.3 mm in root mean square focus deviation (FDx) from vertical to horizontal position was measured. Mirror shape specifications may thus not be applicable in all positions. Concerning the mounting onto different types of modeled support frame (in horizontal position) a variation of 0.5 mrad (SDx) and 1.8 mm (FDx) was calculated for perfectly shaped RP3 inner mirrors mounted onto an ideally rigid support frame compared to the case when mounted to a support frame with elastic brackets.

elib-URL des Eintrags:https://elib.dlr.de/91769/
Dokumentart:Zeitschriftenbeitrag
Titel:Analysis of parabolic trough concentrator mirror shape accuracy in different measurement setups
Autoren:
AutorenInstitution oder E-Mail-AdresseAutoren-ORCID-iDORCID Put Code
Meiser, SiwSiw.Meiser (at) dlr.deNICHT SPEZIFIZIERTNICHT SPEZIFIZIERT
Lüpfert, EckhardEckhard.Luepfert (at) dlr.dehttps://orcid.org/0000-0002-6207-975XNICHT SPEZIFIZIERT
Schiricke, Björnbjoern.schiricke (at) dlr.dehttps://orcid.org/0000-0003-0572-2048137346320
Pitz-Paal, Robertrobert.pitz-paal (at) dlr.dehttps://orcid.org/0000-0002-3542-3391NICHT SPEZIFIZIERT
Datum:2014
Erschienen in:Energy Procedia
Referierte Publikation:Ja
Open Access:Ja
Gold Open Access:Nein
In SCOPUS:Ja
In ISI Web of Science:Nein
DOI:10.1016/j.egypro.2014.03.226
Seitenbereich:Seiten 2135-2144
Verlag:Elsevier
Name der Reihe:El Sevier
ISSN:1876-6102
Status:veröffentlicht
Stichwörter:parabolic trough; mirror; shape accuracy; quality control; optical measurement; deflectometry; finite element modeling
HGF - Forschungsbereich:Energie
HGF - Programm:Erneuerbare Energie
HGF - Programmthema:Konzentrierende Solarsysteme (alt)
DLR - Schwerpunkt:Energie
DLR - Forschungsgebiet:E SF - Solarforschung
DLR - Teilgebiet (Projekt, Vorhaben):E - Qualifizierung (alt)
Standort: Köln-Porz
Institute & Einrichtungen:Institut für Solarforschung > Qualifizierung
Hinterlegt von: Kruschinski, Anja
Hinterlegt am:11 Nov 2014 13:31
Letzte Änderung:29 Nov 2023 08:47

Nur für Mitarbeiter des Archivs: Kontrollseite des Eintrags

Blättern
Suchen
Hilfe & Kontakt
Informationen
electronic library verwendet EPrints 3.3.12
Gestaltung Webseite und Datenbank: Copyright © Deutsches Zentrum für Luft- und Raumfahrt (DLR). Alle Rechte vorbehalten.