Application Experience and Field Performance of Silvered Polymer Reflectors

Application Experience and Field Performance of Silvered Polymer Reflectors

Research output: Contribution to conference › Paper

Abstract

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 cleanedmonthly 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.

Original language	American English
Number of pages	10
State	Published - 1991
Event	International Solar Energy Society Conference - Denver, Colorado Duration: 19 Aug 1991 → 23 Aug 1991

Conference

Conference	International Solar Energy Society Conference
City	Denver, Colorado
Period	19/08/91 → 23/08/91

Bibliographical note

Prepared for the International Solar Energy Society Conference, Denver, Colorado

NREL Publication Number

NREL/TP-257-4146

Keywords

polymers
reflectors
silvered polymer
solar

Access to Document

https://www.nrel.gov/docs/legosti/old/4146.pdf

Cite this

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title = "Application Experience and Field Performance of Silvered Polymer Reflectors",

abstract = "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 cleanedmonthly 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.",

keywords = "polymers, reflectors, silvered polymer, solar",

author = "NREL",

note = "Prepared for the International Solar Energy Society Conference, Denver, Colorado; International Solar Energy Society Conference ; Conference date: 19-08-1991 Through 23-08-1991",

year = "1991",

language = "American English",

}

TY - CONF

T1 - Application Experience and Field Performance of Silvered Polymer Reflectors

AU - NREL, null

N1 - Prepared for the International Solar Energy Society Conference, Denver, Colorado

PY - 1991

Y1 - 1991

N2 - 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 cleanedmonthly 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.

AB - 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 cleanedmonthly 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.

KW - polymers

KW - reflectors

KW - silvered polymer

KW - solar

M3 - Paper

T2 - International Solar Energy Society Conference

Y2 - 19 August 1991 through 23 August 1991

ER -

Application Experience and Field Performance of Silvered Polymer Reflectors

Abstract

Conference

Bibliographical note

NREL Publication Number

Keywords

Access to Document

Fingerprint

Cite this