Angular-dependent optical properties of coated glazings: validation of two predictive algorithms

Arne Roos; Joakim Karlsson; Peter A. van Nijnatten; Michael G. Hutchins; Piero Polato; Enrico Nichelatti; Marco Montecchi; Francois Olive; Charles Anderson

doi:10.1117/12.448261

13 November 2001 Angular-dependent optical properties of coated glazings: validation of two predictive algorithms

Arne Roos, Joakim Karlsson, Peter A. van Nijnatten, Michael G. Hutchins, Piero Polato, Enrico Nichelatti, Marco Montecchi, Francois Olive, Charles Anderson

Author Affiliations +

Proceedings Volume 4458, Solar and Switching Materials; (2001) https://doi.org/10.1117/12.448261
Event: International Symposium on Optical Science and Technology, 2001, San Diego, CA, United States

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.

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Arne Roos, Joakim Karlsson, Peter A. van Nijnatten, Michael G. Hutchins, Piero Polato, Enrico Nichelatti, Marco Montecchi, Francois Olive, and Charles Anderson "Angular-dependent optical properties of coated glazings: validation of two predictive algorithms", Proc. SPIE 4458, Solar and Switching Materials, (13 November 2001); https://doi.org/10.1117/12.448261

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