Selective coatings of the black pigment F6331

Conference · Tue Jan 01 04:00:00 EST 1980 · Proc. Annu. Meet. - Am. Sect. Int. Sol. Energy Soc.; (United States)

OSTI ID:6552443

Agarwal, V K; Larson, D C

Experimental data are reported on thickness dependence of the solar absorptivity (..cap alpha..) and infrared emissivity (epsilon) of coatings of a selective black paint. The paint consists of a pigment F6331 (Mangenese Ferrite Black Spinel from Ferro Corp.) dispersed in Silicone binder. The coatings were either dip coated or sprayed on aluminum thin foils. Both ..cap alpha.. and epsilon increase with increasing thickness but ..cap alpha.. increases more rapidly thus making these coatings spectrally selective. The optimal thickness of the coating is then calculated by maximizing the efficiency of a flat plate collector coated with the above selective paint for three different clear days of the year. A thickness of 2 ..mu..m was found to be optimal for all three days. A simple theoretical absorption model is proposed to interpret the experimental data.

• Research Organization: Drexel Univ., Philadelphia, PA
• OSTI ID: 6552443
• Report Number(s): CONF-800604-P3
• Conference Information: Journal Name: Proc. Annu. Meet. - Am. Sect. Int. Sol. Energy Soc.; (United States) Journal Volume: 3.2
• Country of Publication: United States
• Language: English

Related Subjects

14 SOLAR ENERGY
141000* -- Solar Collectors & Concentrators
ABSORPTIVITY
ALKALINE EARTH METAL COMPOUNDS
ALUMINIUM
ALUMINIUM COMPOUNDS
ALUMINIUM OXIDES
BINDERS
BLACK COATINGS
CHALCOGENIDES
COATINGS
DIMENSIONS
DIPPED COATINGS
ELEMENTS
EMISSIVITY
EQUIPMENT
MAGNESIUM COMPOUNDS
MAGNESIUM OXIDES
METALS
MINERALS
OPTICAL PROPERTIES
OPTIMIZATION
OXIDES
OXYGEN COMPOUNDS
PHYSICAL PROPERTIES
PIGMENTS
SEMIMETALS
SILICON
SOLAR EQUIPMENT
SPECTRALLY SELECTIVE SURFACES
SPINELS
SPRAYED COATINGS
SURFACE PROPERTIES
SURFACES
THICKNESS