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Design of Nanostructured Selective Surfaces for Solar to Thermal Energy Conversion

Published online by Cambridge University Press:  19 August 2014

Daniel L. Gau ,
Ricardo E. Marotti ,
Federico Davoine ,
Lucía I. Amy ,
Enrique A. Dalchiele ,
Rocío Romero ,
José R. Ramos-Barrado ,
Dietmar Leinen ,
Francisco Martín  and
Santiago Botasini
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Daniel L. Gau
Affiliation:
Instituto de Física & CINQUIFIMA, Facultad de Ingeniería, Universidad de la República, Julio H. Reissig 565, CC 30, CP 11000, Montevideo, Uruguay.
Ricardo E. Marotti
Affiliation:
Instituto de Física & CINQUIFIMA, Facultad de Ingeniería, Universidad de la República, Julio H. Reissig 565, CC 30, CP 11000, Montevideo, Uruguay.
Federico Davoine
Affiliation:
Instituto de Física & CINQUIFIMA, Facultad de Ingeniería, Universidad de la República, Julio H. Reissig 565, CC 30, CP 11000, Montevideo, Uruguay.
Lucía I. Amy
Affiliation:
Instituto de Física & CINQUIFIMA, Facultad de Ingeniería, Universidad de la República, Julio H. Reissig 565, CC 30, CP 11000, Montevideo, Uruguay.
Enrique A. Dalchiele
Affiliation:
Instituto de Física & CINQUIFIMA, Facultad de Ingeniería, Universidad de la República, Julio H. Reissig 565, CC 30, CP 11000, Montevideo, Uruguay.
Rocío Romero
Affiliation:
Lab. de Materiales y Superficies (Unidad Asociada al CSIC), Dptos. de Física Aplicada & Ingeniería Química, Universidad de Málaga, Campus de Teatinos s/n, E29071 Málaga, Spain.
José R. Ramos-Barrado
Affiliation:
Lab. de Materiales y Superficies (Unidad Asociada al CSIC), Dptos. de Física Aplicada & Ingeniería Química, Universidad de Málaga, Campus de Teatinos s/n, E29071 Málaga, Spain.
Dietmar Leinen
Affiliation:
Lab. de Materiales y Superficies (Unidad Asociada al CSIC), Dptos. de Física Aplicada & Ingeniería Química, Universidad de Málaga, Campus de Teatinos s/n, E29071 Málaga, Spain.
Francisco Martín
Affiliation:
Lab. de Materiales y Superficies (Unidad Asociada al CSIC), Dptos. de Física Aplicada & Ingeniería Química, Universidad de Málaga, Campus de Teatinos s/n, E29071 Málaga, Spain.
Santiago Botasini
Affiliation:
Lab. de Biomateriales, Instituto de Química Biológica, Facultad de Ciencias, Universidad de la República, Iguá 4225, CP 11400, Montevideo, Uruguay.
Eduardo Méndez
Affiliation:
Lab. de Biomateriales, Instituto de Química Biológica, Facultad de Ciencias, Universidad de la República, Iguá 4225, CP 11400, Montevideo, Uruguay.
Gonzalo Abal
Affiliation:
Instituto de Física & CINQUIFIMA, Facultad de Ingeniería, Universidad de la República, Julio H. Reissig 565, CC 30, CP 11000, Montevideo, Uruguay.
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Abstract

The solar absorptance αs of nanostructured selective surface (NSS) for solar thermal energy is improved. The NSS are prepared by AC electrochemical impregnation of metal inclusions (MI) into porous anodized aluminum oxide (AAO). The dependence of the NSS performance with composition depth profile and MI is studied by numeric simulations based in a gradient index model and effective medium theory. The results are compared with experimental NSS prepared varying three control parameters and MI (Ni, Cu, Ag). The αs is improved to > 85% (keeping thermal emittance εT relatively low) for Ni MI, mainly by increasing MI content. Increasing AAO thickness or MI molecular weight (for a given experimental composition profile) also improves the performance. For Ag the αs was further improved to 90%.

Keywords

absorbentnanostructureoptical properties
Type
Articles
Information
MRS Online Proceedings Library (OPL) , Volume 1709: Symposium WW – Materials by Design–Merging Advanced In-Situ Characterization with Predictive Simulation , 2014 , mrss14-1709-ww03-03
Copyright
Copyright © Materials Research Society 2014 

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