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Spectral reflectance properties of black chrome for use as a solar selective coatingThe NASA-Lewis Research Center has determined that a widely available commercially electroplated decorative finish known as black chrome has desirable solar selective properties. Black chrome electroplated coating has high absorbtance in the solar spectrum and low emissivity in the 250 F blackbody thermal spectrum. The spectral reflectance properties of a commercially prepared black chrome on steel have been measured. Values are presented for reflectance of the black chrome, and compared with the reflectance of black paint and with two available samples of black nickel which had been prepared for solar selective properties. The reflectance of black chrome, of the two black nickels, and of black paint integrated over the solar spectrum for air mass 2 were 0.132, 0.123, 0.133, and 0.033, respectively. The reflectance of the black chrome, two black nickels, and of the black paint integrated over the blackbody spectrum for 250 F from 3 to 15 microns are 0.912, 0.934, 0.891, and 0.033, respectively. These reflectance measurements indicate absorptivity-to-emissivity values of 9.8, 13.8, 8.0, and 1.00, respectively.
Document ID
19740062632
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Mcdonald, G. E.
(NASA Lewis Research Center Cleveland, Ohio, United States)
Date Acquired
August 7, 2013
Publication Date
August 1, 1974
Subject Category
Materials, Nonmetallic
Meeting Information
Meeting: Annual Meeting of the International Solar Energy Society
Location: Fort Collins, CO
Start Date: August 19, 1974
End Date: August 23, 1974
Sponsors: International Solar Energy Society
Accession Number
74A45382
Distribution Limits
Public
Copyright
Other

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