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Bandarra Filho, EP, Hernandez Mendoza, OS, Lins Beicker, CL et al. (2 more authors) (2014) Experimental investigation of a silver nanoparticle-based direct absorption solar thermal system. Energy Conversion and Management, 84. pp. 261-267. ISSN 0196-8904
Abstract
A nanoparticle-based direct absorption system provides a promising alternative to conventional solar collectors. This work investigates experimentally the photothermal conversion characteristics of one of the plasmonic nanoparticles, i.e., silver, under realistic conditions. Stable silver nanofluids are formulated through a high-pressure homogenizer and the experiments are conducted under sunlight on a rooftop with tests running continuously for 10 h. The results show that silver particles have excellent photothermal conversion capability even under very low concentrations. Up to 144% enhancement in the stored thermal energy can be obtained at the peak temperature for a particle concentration of 6.5 ppm. The photothermal conversion performance shows a transient behavior and is best achieved at the initial radiation period due to the low heat loss and strong surface plasmon resonance effect of silver nanofluids. Nearly constant initial specific absorption rate (SAR), 0.6 kW/g, is obtained for nanoparticle concentrations up to 6.5 ppm, but it decreases significantly at higher concentrations, which is associated with increased particle–particle interactions.
Metadata
Item Type: | Article |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | (c) Elsevier, 2014. This is an author produced version of a paper published in Energy Conversion and Management. Uploaded in accordance with the publisher's self-archiving policy. |
Keywords: | Nanofluids; Silver nanoparticle; Solar thermal system; Photothermal conversion; Direct absorption; Specific absorption rate |
Dates: |
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Institution: | The University of Leeds |
Academic Units: | The University of Leeds > Faculty of Engineering & Physical Sciences (Leeds) > School of Chemical & Process Engineering (Leeds) |
Depositing User: | Symplectic Publications |
Date Deposited: | 29 Apr 2016 08:41 |
Last Modified: | 03 Nov 2016 09:06 |
Published Version: | http://dx.doi.org/10.1016/j.enconman.2014.04.009 |
Status: | Published |
Publisher: | Elsevier |
Identification Number: | 10.1016/j.enconman.2014.04.009 |
Related URLs: | |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:99176 |
Available Versions of this Item
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Experimental investigation of a silver nanoparticle-based direct absorption solar thermal system. (deposited 06 Apr 2016 08:37)
- Experimental investigation of a silver nanoparticle-based direct absorption solar thermal system. (deposited 29 Apr 2016 08:41) [Currently Displayed]