Optical coatings for flat plate solar collectors. Final report, 16 Sep 1974--16 Sep 1975

Technical Report · Mon Sep 01 04:00:00 EDT 1975

OSTI ID:7339553

Mar, H Y.B.; Lin, J H; Zimmer, P B; Peterson, R E; Gross, J S

Optical coatings that would enhance the economic feasibility of flat plate solar collectors were investigated. Processes were developed for producing single and double layer antireflection coatings on glass by dipping in a silica saturated fluosilicic acid solution. The three most promising selective absorbing plated coatings and their typical optical properties were: black nickel (nickel--zinc sulfide), alpha /sup +/ 0.95, epsilon /sup +/ 0.07; black chrome (chrome oxide), epsilon /sup +/ 0.10; Selective paint coatings were developed with nominal optical properties of alpha /sup +/ 0.90 and epsilon /sup +/ 0.30. Materials cost for a typical selective paint were estimated at 0.1 cents/sq ft, a factor of at least 10 lower than the selective plated coatings investigated. Paint coating thickness and pigment alpha were the key parameters affecting optical performance. Improvements in paint coating optical performance can be expected with further development. (GRA)

• Research Organization: Honeywell, Inc., Minneapolis, Minn. (USA). Systems and Research Center
• OSTI ID: 7339553
• Report Number(s): PB-252383
• Country of Publication: United States
• Language: English

Related Subjects

14 SOLAR ENERGY
141000* -- Solar Collectors & Concentrators
ANTIREFLECTION COATINGS
CHALCOGENIDES
CHROMIUM COMPOUNDS
CHROMIUM OXIDES
COATINGS
COST
FLAT PLATE COLLECTORS
INORGANIC PHOSPHORS
NICKEL COMPOUNDS
NICKEL SULFIDES
OPTICAL PROPERTIES
OXIDES
OXYGEN COMPOUNDS
PAINTS
PHOSPHORS
PHYSICAL PROPERTIES
SOLAR COLLECTORS
SULFIDES
SULFUR COMPOUNDS
TRANSITION ELEMENT COMPOUNDS
ZINC COMPOUNDS
ZINC SULFIDES