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Proceedings Paper

Angular-dependent optical properties of coated glazings: validation of two predictive algorithms
Author(s): Arne Roos; Joakim Karlsson; Peter A. van Nijnatten; Michael G. Hutchins; Piero Polato; Enrico Nichelatti; Marco Montecchi; Francois Olive; Charles Anderson
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Paper Abstract

The angular dependent optical properties of low-e and solar control glazings have been investigated in a European project, ADOPT, within the Standards Measurements and Testing programme. Two new predictive algorithms have been proposed and tested. One algorithm is based on an empirical formula and the other is based on a hybrid equivalent model, which approximates the actual coated glass. The validation procedure has included measurements as well as Fresnel calculations. The algorithms allow the user to calculate the solar heat gain coefficient versus angle of incidence for any transparent window combination without having to perform time-consuming measurements. For the tested window configurations the precision is mostly within one percentage point as compared to measured results.

Paper Details

Date Published: 13 November 2001
PDF: 10 pages
Proc. SPIE 4458, Solar and Switching Materials, (13 November 2001); doi: 10.1117/12.448261
Show Author Affiliations
Arne Roos, Uppsala Univ. (Sweden)
Joakim Karlsson, Uppsala Univ. (Sweden)
Peter A. van Nijnatten, TNO-TDP (Netherlands)
Michael G. Hutchins, Oxford Brookes Univ. (United Kingdom)
Piero Polato, Stazione Sperimentale del Vetro (Italy)
Enrico Nichelatti, ENEA-Casaccia (Italy)
Marco Montecchi, ENEA-Casaccia (Italy)
Francois Olive, Ctr. Scientifique et Technique de Batiment (France)
Charles Anderson, Saint Gobain Recherche (France)

Published in SPIE Proceedings Vol. 4458:
Solar and Switching Materials
Carl M. Lampert; Carl M. Lampert; Claes-Goran Granqvist; Claes-Goeran Granqvist; Keith L. Lewis; Keith L. Lewis, Editor(s)

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