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Application Experience and Field Performance of Silvered Polymer Reflectors

Paul SchisselGary J. JorgensenJ. Roland Pitts

出版	National Renewable Energy Laboratory, 1991
URL	http://books.google.com.hk/books?id=z2ZX0AEACAAJ&hl=&source=gbs_api

註釋The solar-weighted hemispheric reflectance of unweathered silvered acrylic mirrors exceeds 92%, and specular reflectance into a 4-milliradian, full-cone acceptance angle is greater than 90%. Comparison of outdoor and accelerated tests suggests that the protected silver can resist corrosion for the five-year life that is the current goal. An installation of parabolic troughs has been cleaned monthly for two years, and reflectance is regularly returned to within a few percent of the initial reflectance values. In the presence of moisture, the silver/acrylic bond can delaminate to form a maze of tunnels and destroy specular reflectance. Proper edge preparation and protection delay the initiation of tunnels.