Spectral selectivity and accelerated life testing of Al‐PbS solar selective surfaces | Zendy

Thangaraj R. | Zendy; Gadgil S. B. | Zendy; Gupta B. K. | Zendy; Iyer J. Vaidhyanathan | Zendy; Agnihotri O. P. A. | Zendy

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Spectral selectivity and accelerated life testing of Al‐PbS solar selective surfaces

Author(s) -

Thangaraj R.,

Gadgil S. B.,

Gupta B. K.,

Iyer J. Vaidhyanathan,

Agnihotri O. P. A.

Publication year - 1982

Publication title -

international journal of energy research

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.808

H-Index - 95

eISSN - 1099-114X

pISSN - 0363-907X

DOI - 10.1002/er.4440060208

Subject(s) - thermal emittance , selective surface , selectivity , absorptance , emissivity , materials science , outgassing , irradiation , coating , thermal , ultraviolet , optics , optoelectronics , analytical chemistry (journal) , chemical engineering , chemistry , composite material , reflectivity , meteorology , catalysis , organic chemistry , beam (structure) , physics , nuclear physics , engineering

High absorptance and low thermal emittance selective surfaces have been formed by evaporating lead sulphide onto Al evaporated Al substrates. The dependence of selectivity, α/ϵ, on thickness has been studied. The maximum selectivity was obtained for PbS thickness of 400 Å. The emissivity is found to increase with temperature. The coatings are stable up to a temperature of 240°C in air. Long term ultraviolet irradiation causes the photo‐oxidation of PbS to PbSO 4 which results in the increase of emittance and a decrease in absorptance. When cycled between 0°C and 200°C, the coatings do not show any signs of degradation.

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