Selective absorbing surface for evacuated solar collector tubes

Yueyan Shi and Xiaoji Yang

Renewable Energy, 1999, vol. 16, issue 1, 632-634

Abstract: The absorptance of AlN-Al(absorbing coating)/Al solar spectrum(0.34 ≈ 2.5 μ m) selective absorbing surface, containing 8-layer AlN-Al composite materials and with distinctive or non-boundaries between the layers, deposited by sputtering technology and heat-treated at 400 °C (60min) is about 0.95 and its thermal emittance is close to 0.07 ≈ 0.08(80 °C). But on the condition that the absorptance is unchanged, the thermal emittance dropped to 0.04 for the AlN-Al coating composed of matel volum fractionic 0.42, 0.25 and 0.00 films.

Keywords: Absorbing surface; sputtering; volume fraction (search for similar items in EconPapers)
Date: 1999
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Persistent link: https://EconPapers.repec.org/RePEc:eee:renene:v:16:y:1999:i:1:p:632-634

DOI: 10.1016/S0960-1481(98)00240-7

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