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: |
| |||||||||||||||||||||||||||
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 |
Repository Staff Only: item control page