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Durability testing of parabolic trough receivers – Overheating, thermal cycling, bellow fatigue and antireflex-coating abrasion

Pernpeintner, Johannes and Sutter, Florian and Happich, Christoph and Lüpfert, Eckhard and Schiricke, Björn and Lichtenthäler, Niels and Thoss, Johannes and Schuhmacher, F. (2014) Durability testing of parabolic trough receivers – Overheating, thermal cycling, bellow fatigue and antireflex-coating abrasion. SolarPACES Conference 2014, 16.-19. Sept. 2014, Peking, China.

Full text not available from this repository.

Abstract

This paper describes accelerated aging tests on parabolic trough receivers. Overheating of parabolic trough receivers about 80-100 K over the nominal operating temperature is applied for accelerated aging of the absorber coating. A lifetime prediction based on the Arrhenius parameters requires extensive testing; A reduced test with heating receivers to 478 °C for 1000 hours is applied on receivers for oil fluid in order to compare heat loss and optical efficiency before and after such accelerated aging. In a further test set, such receivers are thermally cycled between 200 °C and 478 °C for 100 times. A bellow fatigue test has been developed for testing of the bellows stability for the compression and expansion. Receivers are subjected to 20,000 cycles and rested for a 24 hour waiting period. The receiver heat loss during the bellow fatigue test shall not increase more than 30 %. Durability of the antireflex coating on the glass is tested with the Taber linear abrasor using the CS-10F rubber (¾”) and MIL 12397 Eraser (¼”). Both abrasive materials proved to be suited to obtain reproducible results, although the discussion is still ongoing on which material should be used. The larger diameter of the CS-10F rubber offers the advantage that transmittance measurement with the Lambda 950/1050 spectrophotometer can be performed without the necessity for multiple abrading stripes.

Item URL in elib:https://elib.dlr.de/91776/
Document Type:Conference or Workshop Item (Speech)
Title:Durability testing of parabolic trough receivers – Overheating, thermal cycling, bellow fatigue and antireflex-coating abrasion
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Pernpeintner, Johannesjohannes.pernpeintner (at) dlr.deUNSPECIFIED
Sutter, FlorianFlorian.Sutter (at) dlr.deUNSPECIFIED
Happich, ChristophSF-QLFUNSPECIFIED
Lüpfert, EckhardEckhard.Luepfert (at) dlr.deUNSPECIFIED
Schiricke, Björnbjoern.schiricke (at) dlr.deUNSPECIFIED
Lichtenthäler, Nielsniels.lichtenthaeler (at) dlr.deUNSPECIFIED
Thoss, Johannesjohannes.thoss (at) dlr.deUNSPECIFIED
Schuhmacher, F.UNSPECIFIEDUNSPECIFIED
Date:16 September 2014
Refereed publication:No
Open Access:No
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Status:Published
Keywords:paraboilc trough receiver; accelerated aging; overheating; thermal cycling; bellow fatigue; abrasion; AR-coating
Event Title:SolarPACES Conference 2014
Event Location:Peking, China
Event Type:international Conference
Event Dates:16.-19. Sept. 2014
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 - Qualification (old)
Location: Köln-Porz
Institutes and Institutions:Institute of Solar Research > Qualifizierung
Deposited By: Kruschinski, Anja
Deposited On:11 Nov 2014 13:36
Last Modified:11 Nov 2014 13:36

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