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Proceedings Paper

Optical properties measurements of solar absorber surfaces: results of an international round-robin program
Author(s): Michael G. Hutchins; P. R. Dolley; Karlhanns Gindele; Michael Koehl; Ulrich Frei; Bo Carlsson; Sakae Tanemura; K. G. T. Hollands; Peter A. van Nijnatten; J. Havinga; A. Gonzalea; E. Mezquida
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Paper Abstract

Results are presented of a round-robin programme of optical properties measurements carried out on a commercial chemically oxidised stainless steel spectrally selective solar absorber surface and two commonly employed reference calibration standards. Measurements of solar absorptance and thermal emittance were obtained using a number of different spectrophotometric, broad-band and radiometric techniques. The results are analysed for each technique employed and comparisons are also made of results obtained from different methods. The results highlight differences which can occur when supposedly identical methods are employed using different commercially available instruments and reflectance attachments. The importance of understanding calibration techniques, the use of diffuse and specular reference standards, calculation methods for optical properties determinations and sample dependent observable effects are clearly demonstrated. Lessons have been learned regarding 'routine' measurements which will assist in developing better practices and refining recommended procedures for commonly quoted surface optical properties.

Paper Details

Date Published: 1 August 1990
PDF: 14 pages
Proc. SPIE 1272, Optical Materials Technology for Energy Efficiency and Solar Energy Conversion IX, (1 August 1990); doi: 10.1117/12.20447
Show Author Affiliations
Michael G. Hutchins, Oxford Polytechnic (United Kingdom)
P. R. Dolley, Oxford Polytechnic (United Kingdom)
Karlhanns Gindele, Univ. Stuttgart (Germany)
Michael Koehl, Univ. Stuttgart (Germany)
Ulrich Frei, Interkantonales Technikum (Switzerland)
Bo Carlsson, Statens Provninganstalt (Sweden)
Sakae Tanemura, Government Industrial Research Institute (Japan)
K. G. T. Hollands, Univ. of Waterloo (Canada)
Peter A. van Nijnatten, Institute of Applied Physics (Netherlands)
J. Havinga, Institute of Applied Physics (Netherlands)
A. Gonzalea, National Institute for Aerospace Technology (Spain)
E. Mezquida, National Institute for Aerospace Technology (Spain)

Published in SPIE Proceedings Vol. 1272:
Optical Materials Technology for Energy Efficiency and Solar Energy Conversion IX
Claes-Goeran Granqvist; Carl M. Lampert, Editor(s)

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