K. T. Roro
CSIR-National Laser Centre, South Africa
N. Tile
CSIR-National Laser Centre, South Africa \ School of Physics, University of KwaZulu Natal, South Africa
B. Yalisi
CSIR-National Laser Centre, South Africa \ School of Physics, University of KwaZulu Natal, South Africa
M. De Gama
CSIR-National Laser Centre, South Africa
T. Wittes
CSIR-National Laser Centre, South Africa
T. Roberts
CSIR-National Laser Centre, South Africa
A. Forbes
CSIR-National Laser Centre, South Africa \ School of Physics, University of KwaZulu Natal, South Africa
Ladda ner artikel
http://dx.doi.org/10.3384/ecp110574006Ingår i: World Renewable Energy Congress - Sweden; 8-13 May; 2011; Linköping; Sweden
Linköping Electronic Conference Proceedings 57:44, s. 4006-4013
Publicerad: 2011-11-03
ISBN: 978-91-7393-070-3
ISSN: 1650-3686 (tryckt), 1650-3740 (online)
A sol-gel technique has been established at a laboratory scale for low cost production of high efficient selective solar absorbers comprising a composite material of nano-structured carbon in a nickel oxide matrix. In order for these materials to be applied in real world scenarios it is necessary to extensively scale up the fabrication process to allow large area coatings. This can be done by adapting this sol-gel technique to large area deposition.
In this project; we are undertaking research and development activities for three-years to make a ‘Lab to Large scale’ transition in order to eventually integrate into existing solar collectors for low cost domestic water heating in a rural area for social good.
A spray coating technique has been used to deposit these C/NiO coatings on aluminum substrates. Preliminary optical results have shown absorptance of up to 90 %. The preparation and characterization as well as the process towards developing a large-area solar selective coating for low cost domestic heating will be discussed.
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