- Author
-
Masters, L. W.
|
Seiler, J. F., Jr.
|
Roberts, W. E. E.
- Title
- Outdoor Exposure Tests of Solar Absorptive Coatings.
- Coporate
- National Bureau of Standards, Washington, DC
- Sponsor
- Department of Energy, Washington, DC
- Report
-
NBSIR 82-2583,
October 1982,
22 p.
- Distribution
- Available from National Technical Information Service
- Keywords
-
absorptive coatings
|
accelerated laboratory exposures
|
degradation
|
outdoor exposures
|
simulated stagnation exposure
|
solar energy
|
solar collectors
- Abstract
- This report is a follow up to an earlier report (NBSIR 81-2232, January 1981) in which data on the performance of selected absorptive coatings in both accelerated laboratory exposures and outdoor exposures at three sites were presented. The research presented in this report focuses upon the results obtained by continuing the outdoor exposures of absorptive coatings using ASTM E781-81, Standard Practice for Evaluating Absorptive Solar Receiver Materials When Exposed to Conditions Simulating Stagnation in Solar Collectors with Cover Plates. Comparison of the results of the outdoor exposures with those obtained in accelerated laboratory exposures indicated that 1) the accelerated exposures, as described in ASTM E744-80, Standard Practice for Evaluating Solar Absorptive Materials for Thermal Applications, provide more severe exposure conditions than outdoor exposures, and 2) the degradation processes induced by outdoor exosure are adequately addressed by the accelerated laboratory exposures.