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Proceedings Paper

Solar Energy - Thin Film Coatings
Author(s): Richard M. Winegarner
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Paper Abstract

The shortfall between our nation's supply and demand for energy has created problems of critical proportions. One solution is to collect, retain, and utilize the energy of the sun. Thin films can be used to modify the amount of solar energy that is reflected, absorbed, or transmitted at various collector surfaces. Three types of films that have direct relation to solar energy are antireflection coatings (p < 2% per surface), selective absorber coatings (a = 0.96/s = 0.06), and transparent-low emittance coatings (T = 0.85/s = 0.14). Studies have shown that through the use of coatings the performance of flat plate collectors can be improved as much as 12.5% and the performance of linear focusing collectors can be improved as much as 22.5%. The resultant changes in the economic viability of the collector systems indicate that the coatings can make a positive contribution to the solar energy collection systems. The implementation of these systems is close at hand and now is the time to press for development.

Paper Details

Date Published: 16 March 1976
PDF: 7 pages
Proc. SPIE 0068, Optics in Solar Energy Utilization I, (16 March 1976); doi: 10.1117/12.978114
Show Author Affiliations
Richard M. Winegarner, Optical Coating Laboratory, Inc. (United States)

Published in SPIE Proceedings Vol. 0068:
Optics in Solar Energy Utilization I
Yale Katz, Editor(s)

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