Degradation of selective solar absorber surfaces in solar thermal collectors – An EIS study

Research paper by João C.S. Fernandes, Ana Nunes, M. João Carvalho, Teresa C. Diamantino

Indexed on: 02 Nov '16Published on: 26 Oct '16Published in: Solar Energy Materials & Solar Cells


The selective solar absorber surface is a fundamental part of a solar thermal collector, as it is responsible for the solar radiation absorption and for reduction of radiation heat losses. The most common absorbers are nowadays produced by vacuum deposition, presenting disadvantages, such as lower durability, lower resistance to corrosion, higher cost and complex production techniques. Spectrally selective paints are a potential alternative for absorbing surfaces in low temperature applications, with attractive features such as ease of processing, durability and commercial availability with low cost. Thus, two PVD coatings and three organic coatings obtained by projection on aluminium substrates were studied.

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