Sol-gel-derived AR coatings for solar receivers
Technical Report
·
OSTI ID:6525524
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 minimum at 550 nm. The solar transmittance of coated tubes is typically increased to 0.95 to 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.
- Research Organization:
- Sandia National Labs., Albuquerque, NM (USA)
- DOE Contract Number:
- AC04-76DP00789
- OSTI ID:
- 6525524
- Report Number(s):
- SAND-84-0662; ON: DE85000192
- Country of Publication:
- United States
- Language:
- English
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