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Enhancing solar-thermal energy conversion with silicon-cored tungsten nanowire selective metamaterial absorbers
This work experimentally studies a silicon-cored tungsten nanowire selective metamaterial absorber to enhance solar-thermal energy harvesting. After conformally coating a thin tungsten layer about 40 nm thick, the metamaterial absorber exhibits almost the same total solar absorptance of 0.85 as the...
Autores principales: | , , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Elsevier
2020
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7753143/ https://www.ncbi.nlm.nih.gov/pubmed/33364587 http://dx.doi.org/10.1016/j.isci.2020.101899 |
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author | Chang, Jui-Yung Taylor, Sydney McBurney, Ryan Ying, Xiaoyan Allu, Ganesh Chen, Yu-Bin Wang, Liping |
author_facet | Chang, Jui-Yung Taylor, Sydney McBurney, Ryan Ying, Xiaoyan Allu, Ganesh Chen, Yu-Bin Wang, Liping |
author_sort | Chang, Jui-Yung |
collection | PubMed |
description | This work experimentally studies a silicon-cored tungsten nanowire selective metamaterial absorber to enhance solar-thermal energy harvesting. After conformally coating a thin tungsten layer about 40 nm thick, the metamaterial absorber exhibits almost the same total solar absorptance of 0.85 as the bare silicon nanowire stamp but with greatly reduced total emittance down to 0.18 for suppressing the infrared emission heat loss. The silicon-cored tungsten nanowire absorber achieves an experimental solar-thermal efficiency of 41% at 203°C during the laboratory-scale test with a stagnation temperature of 273°C under 6.3 suns. Without parasitic radiative losses from side and bottom surfaces, it is projected to reach 74% efficiency at the same temperature of 203°C with a stagnation temperature of 430°C for practical application, greatly outperforming the silicon nanowire and black absorbers. The results would facilitate the development of metamaterial selective absorbers at low cost for highly efficient solar-thermal energy systems. |
format | Online Article Text |
id | pubmed-7753143 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2020 |
publisher | Elsevier |
record_format | MEDLINE/PubMed |
spelling | pubmed-77531432020-12-23 Enhancing solar-thermal energy conversion with silicon-cored tungsten nanowire selective metamaterial absorbers Chang, Jui-Yung Taylor, Sydney McBurney, Ryan Ying, Xiaoyan Allu, Ganesh Chen, Yu-Bin Wang, Liping iScience Article This work experimentally studies a silicon-cored tungsten nanowire selective metamaterial absorber to enhance solar-thermal energy harvesting. After conformally coating a thin tungsten layer about 40 nm thick, the metamaterial absorber exhibits almost the same total solar absorptance of 0.85 as the bare silicon nanowire stamp but with greatly reduced total emittance down to 0.18 for suppressing the infrared emission heat loss. The silicon-cored tungsten nanowire absorber achieves an experimental solar-thermal efficiency of 41% at 203°C during the laboratory-scale test with a stagnation temperature of 273°C under 6.3 suns. Without parasitic radiative losses from side and bottom surfaces, it is projected to reach 74% efficiency at the same temperature of 203°C with a stagnation temperature of 430°C for practical application, greatly outperforming the silicon nanowire and black absorbers. The results would facilitate the development of metamaterial selective absorbers at low cost for highly efficient solar-thermal energy systems. Elsevier 2020-12-07 /pmc/articles/PMC7753143/ /pubmed/33364587 http://dx.doi.org/10.1016/j.isci.2020.101899 Text en © 2020 The Author(s) http://creativecommons.org/licenses/by/4.0/ This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/4.0/). |
spellingShingle | Article Chang, Jui-Yung Taylor, Sydney McBurney, Ryan Ying, Xiaoyan Allu, Ganesh Chen, Yu-Bin Wang, Liping Enhancing solar-thermal energy conversion with silicon-cored tungsten nanowire selective metamaterial absorbers |
title | Enhancing solar-thermal energy conversion with silicon-cored tungsten nanowire selective metamaterial absorbers |
title_full | Enhancing solar-thermal energy conversion with silicon-cored tungsten nanowire selective metamaterial absorbers |
title_fullStr | Enhancing solar-thermal energy conversion with silicon-cored tungsten nanowire selective metamaterial absorbers |
title_full_unstemmed | Enhancing solar-thermal energy conversion with silicon-cored tungsten nanowire selective metamaterial absorbers |
title_short | Enhancing solar-thermal energy conversion with silicon-cored tungsten nanowire selective metamaterial absorbers |
title_sort | enhancing solar-thermal energy conversion with silicon-cored tungsten nanowire selective metamaterial absorbers |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7753143/ https://www.ncbi.nlm.nih.gov/pubmed/33364587 http://dx.doi.org/10.1016/j.isci.2020.101899 |
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