Shanmugam, N.V. and Selvam, M. and Srinivasan, K.N. and John, S. and Shenoi, B.A. (1984) Black nickel-tin selective coatings for solar thermal energy conversion. Metal Finishing, 82 (10). pp. 91-95. ISSN 0026-0576

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Abstract

Efficient conversion of solar energy into heat energy requires a selective absorber surface which has high absorptance (alpha) across the solar spectrum (0.2-3.0 micrometer) with low thermal emittance (e) in the infrared region (>3 micrometer)1-3. These two characteristics combine to increase the effective absorber sheet temperature. Consequently, the heat transfer between sheet and transfer medium, such as air, water, organic liquids, etc., is improved. Among the various selective coatings that have been studied, black chromium emerged as a strong candidate for solar energy collectors because of its favorable selective properties and long-term durability 4,5. Production of such coatings, however, requires high current in addition to cooling. Thus, capital investment is higher and the coating is costly. Black nickel 2,6-10 also possesses good optical properties, but its corrosion resistance is moderate. Hence, attempts have been made to develop alternate, economical and durable coatings. In this paper, the authors report the development of a practical formulation for the deposition of black nickel-tin. The results obtained with regard to the effects of solution composition and operating conditions on the appearance and optical properties of the deposited coatings are studied. The characteristics of the deposit have also been studied with regard to suitability for energy conversion

Item Type:	Article
Uncontrolled Keywords:	Black nickel-tin; Solar thermal energy conversion
Subjects:	Industrial Metal Finishing
Divisions:	UNSPECIFIED
Depositing User:	ttbdu cecri
Date Deposited:	01 Nov 2012 13:08
Last Modified:	01 Nov 2012 13:08
URI:	http://cecri.csircentral.net/id/eprint/2879

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