Jin, H, Lin, G, Bai, L orcid.org/0000-0001-9016-1569 et al. (2 more authors) (2016) Steam generation in a nanoparticle-based solar receiver. Nano Energy, 28. pp. 397-406. ISSN 2211-2855
Abstract
Steam production is essential for a wide range of applications, and currently there is still strong debate if steam could be generated on top of heated nanoparticles in a solar receiver. We performed steam generation experiments for different concentrations of gold nanoparticles dispersions in a cylindrical receiver under focused natural sunlight of 220 Suns. Combined with mathematical modelling, it is found that steam generation is mainly caused by localized boiling and vaporization in the superheated region due to highly non-uniform temperature and radiation energy distribution, albeit the bulk fluid is still subcooled. Such a phenomenon can be well explained by the classical heat transfer theory, and the hypothesized ‘nanobubble’, i.e., steam produced around the heated nanoparticles, is unlikely to occur under normal solar concentrations. In the future solar receiver design, more solar energy should be focused and trapped at the superheated region while minimizing the temperature rise of the bulk fluid.
Metadata
Item Type: | Article |
---|---|
Authors/Creators: |
|
Copyright, Publisher and Additional Information: | © 2016 Elsevier Ltd. All rights reserved. This is an author produced version of a paper published in Nano Energy. Uploaded in accordance with the publisher's self-archiving policy. |
Keywords: | Nanoparticle; Steam generation; Nanobubble; Solar energy; Volumetric receiver |
Dates: |
|
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: | 02 Sep 2016 10:02 |
Last Modified: | 06 Aug 2017 07:40 |
Published Version: | http://dx.doi.org/10.1016/j.nanoen.2016.08.011 |
Status: | Published |
Publisher: | Elsevier |
Identification Number: | 10.1016/j.nanoen.2016.08.011 |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:104305 |