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Silver nanofluids based broadband solar absorber through tuning nanosilver geometries

Silver nanofluids based broadband solar absorber through tuning nanosilver geometries
Silver nanofluids based broadband solar absorber through tuning nanosilver geometries
This work explores the strategy for increasing the efficiency of solar thermal energy capture by the utilisation of a blended mixture of plasmonic silver nanofluids in a direct absorption solar collector. For the first time, a broadband absorber based on combining three silver-based nanofluids, each with a tailored plasmonic response covering a different wavelength range, was designed and synthesised. The potential efficiency of this broadband absorber was estimated from the UV–Vis–IR spectra and from direct measurement of the temperature rise obtained in static tests in a solar simulator. The results from the two methods were comparable. The broadband absorber was shown to increase the efficiency of capture compared to the component nanofluids and compared to water. The temperature rise in the solar simulator for the broadband mixture was more than four times that of water and the photo-thermal conversion efficiency was approximately 85%, demonstrating the promise of this mixture for enhancing solar energy capture. However, this work also illustrates the potential issues with utilising silver for solar applications, namely the change in morphology and UV–Vis–IR spectra with light exposure. A suitable stabilisation or coating strategy would hence be required to use this developed broadband absorber in solar energy applications.
Broadband solar absorber;, Nanofluids, Plasmonic, Silver nanodiscs, Silver nanoprisms;, Stability
0038-092X
515-526
Kimpton, Harriet Jill
30c744e7-3f80-4a81-a53c-03f44074a805
Stulz, Eugen
9a6c04cf-32ca-442b-9281-bbf3d23c622d
Zhang, Xunli
d7cf1181-3276-4da1-9150-e212b333abb1
Kimpton, Harriet Jill
30c744e7-3f80-4a81-a53c-03f44074a805
Stulz, Eugen
9a6c04cf-32ca-442b-9281-bbf3d23c622d
Zhang, Xunli
d7cf1181-3276-4da1-9150-e212b333abb1

Kimpton, Harriet Jill, Stulz, Eugen and Zhang, Xunli (2020) Silver nanofluids based broadband solar absorber through tuning nanosilver geometries. Solar Energy, 208, 515-526.

Record type: Article

Abstract

This work explores the strategy for increasing the efficiency of solar thermal energy capture by the utilisation of a blended mixture of plasmonic silver nanofluids in a direct absorption solar collector. For the first time, a broadband absorber based on combining three silver-based nanofluids, each with a tailored plasmonic response covering a different wavelength range, was designed and synthesised. The potential efficiency of this broadband absorber was estimated from the UV–Vis–IR spectra and from direct measurement of the temperature rise obtained in static tests in a solar simulator. The results from the two methods were comparable. The broadband absorber was shown to increase the efficiency of capture compared to the component nanofluids and compared to water. The temperature rise in the solar simulator for the broadband mixture was more than four times that of water and the photo-thermal conversion efficiency was approximately 85%, demonstrating the promise of this mixture for enhancing solar energy capture. However, this work also illustrates the potential issues with utilising silver for solar applications, namely the change in morphology and UV–Vis–IR spectra with light exposure. A suitable stabilisation or coating strategy would hence be required to use this developed broadband absorber in solar energy applications.

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SE-D-20-01506R1 - Accepted Manuscript
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SI Broadband paper Kimpton SE-D-20-01506 R1 Unmarked-Revision - Accepted Manuscript
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More information

Accepted/In Press date: 7 August 2020
e-pub ahead of print date: 15 August 2020
Keywords: Broadband solar absorber;, Nanofluids, Plasmonic, Silver nanodiscs, Silver nanoprisms;, Stability

Identifiers

Local EPrints ID: 443285
URI: http://eprints.soton.ac.uk/id/eprint/443285
ISSN: 0038-092X
PURE UUID: e793d1f6-9a47-4d5a-9204-7cd343decafd
ORCID for Harriet Jill Kimpton: ORCID iD orcid.org/0000-0002-3219-217X
ORCID for Eugen Stulz: ORCID iD orcid.org/0000-0002-5302-2276
ORCID for Xunli Zhang: ORCID iD orcid.org/0000-0002-4375-1571

Catalogue record

Date deposited: 20 Aug 2020 16:30
Last modified: 26 Nov 2021 02:52

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Contributors

Author: Harriet Jill Kimpton ORCID iD
Author: Eugen Stulz ORCID iD
Author: Xunli Zhang ORCID iD

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