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Electronic Resource
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SAND Report: SAND84-0662, September 1984.
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Library's review
ABSTRACT:
This report details a process for applying sol-gel antireflection (AR) coatings to solar receiver envelopes. The process consists of applying a porous film which is subsequently etched to achieve the optimum AR effect. The result is a single-layer interference film with a reflectance
This report details a process for applying sol-gel antireflection (AR) coatings to solar receiver envelopes. The process consists of applying a porous film which is subsequently etched to achieve the optimum AR effect. The result is a single-layer interference film with a reflectance
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minimum at 550 nm. The solar transmittance of coated tubes is typically increased to 0.95 - 0.97, as compared with 0.91 for uncoated tubes. Coated tubes showed no significant decrease in solar transmittance after 16 weeks of operation in a parabolic trough collector system. Recommendations are included for process improvement before industrial scale-up. Show Less