Chen, M, He, Y, Zhu, J et al. (1 more author) (2016) Investigating the collector efficiency of silver nanofluids based direct absorption solar collectors. Applied Energy, 181. pp. 65-74. ISSN 0306-2619
Abstract
A one-dimensional transient heat transfer analysis was carried out to analyze the effects of the Nanoparticle (NP) volume fraction, collector height, irradiation time, solar flux, and NP material on the collector efficiency. The numerical results were compared with the experimental results obtained by silver nanofluids to validate the model, and good agreement was obtained. The numerical results show that the collector efficiency increases as the collector height and NP volume fraction increase and then reaches a maximum value. An optimum collector height (∼10 mm) and particle concentration (∼0.03%) achieving a collector efficiency of 90% of the maximum efficiency can be obtained under the conditions used in the simulation. However, the collector efficiency decreases as the irradiation time increases owing to the increased heat loss. A high solar flux is desirable to maintain a high efficiency over a wide temperature range, which is beneficial for subsequent energy utilization. The modeling results also show silver and gold nanofluids obtain higher photothermal conversion efficiencies than the titanium dioxide nanofluid because their absorption spectra are similar to the solar radiation spectrum.
Metadata
Item Type: | Article |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | © 2016, Elsevier Ltd. This is an author produced version of a paper published in Applied Energy. Uploaded in accordance with the publisher's self-archiving policy. |
Keywords: | Solar energy; Silver nanofluid; Direct solar absorption collector; Collector efficiency |
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: | 14 Oct 2016 14:43 |
Last Modified: | 05 Sep 2017 23:19 |
Published Version: | http://dx.doi.org/10.1016/j.apenergy.2016.08.054 |
Status: | Published |
Publisher: | Elsevier |
Identification Number: | 10.1016/j.apenergy.2016.08.054 |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:105975 |