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Proceedings Paper

Accelerated life testing of solar absorber coatings
Author(s): Bo Carlsson; K. Moeller; Ulrich Frei; Michael Koehl
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Paper Abstract

Results from a comprehensive case study on accelerated life testing of some selective solar collector absorber coatings for DHW systems are reviewed. The study was conducted within Task X `Solar Materials Research and Development' of the IEA Solar Heating and Cooling Program from 1987 to 1992 and is unique due to its quantitative and systematic approach for durability assessment. The work of case study involved the development of both experimental and theoretical tools to aid the assessment of service life or absorber coatings. This entailed performance analysis, failure analysis, microclimate characterization, environmental resistance testing and life date analysis. Predicted in-service degradation of coatings from accelerated life testing was found to be in fairly good agreement both qualitatively and quantitatively with what was actually observed on coatings installed and tested for three years in solar collectors working under typical DHW conditions.

Paper Details

Date Published: 9 September 1994
PDF: 12 pages
Proc. SPIE 2255, Optical Materials Technology for Energy Efficiency and Solar Energy Conversion XIII, (9 September 1994); doi: 10.1117/12.185359
Show Author Affiliations
Bo Carlsson, Statens Provninganstalt (Sweden)
K. Moeller, Statens Provninganstalt (Sweden)
Ulrich Frei, Solarenergie Pruef- und Forschungsstelle, Ingenieurschule ITR (Switzerland)
Michael Koehl, Fraunhofer-Institut fuer Solare Energiesysteme (Germany)


Published in SPIE Proceedings Vol. 2255:
Optical Materials Technology for Energy Efficiency and Solar Energy Conversion XIII
Volker Wittwer; Claes G. Granqvist; Carl M. Lampert, Editor(s)

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