Navarrete, N, Mondragón, R, Wen, D orcid.org/0000-0003-3492-7982 et al. (3 more authors) (2019) Thermal energy storage of molten salt–based nanofluid containing nano-encapsulated metal alloy phase change materials. Energy, 167. pp. 912-920. ISSN 0360-5442
Abstract
The availability of Thermal Energy Storage systems in Concentrated Solar Power plants makes them suitable to handle the gap between energy supply and power demand. Increasing the total thermal energy storage capacity of the Thermal Energy Storage materials used is of interest to improve their efficiency. In this work the thermal energy storage of the so called solar salt (60% NaNO₃ - 40% KNO₃) was improved by adding a phase change material composed of Al-Cu alloy nanoencapsulated with an aluminium oxide layer naturally formed when exposed to oxygen. The resistance of the oxide shell to thermal cycling up to 570 °C and its compatibility with the molten salt were proved. The specific heat and the total thermal energy storage were evaluated at different solid mass loads. Although the specific heat and thus the sensible heat storage decreases with solid content, the contribution of the phase change enthalpy and the latent heat storage can increase the total thermal energy storage up to a 17.8% at constant volume basis comparison. Besides, the thermal conductivity of the nanofluid was increased when adding the nanoparticles improving its heat transfer performance under some particular conditions.
Metadata
Item Type: | Article |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | © 2018 Elsevier Ltd. This is an author produced version of a paper published in Energy. Uploaded in accordance with the publisher's self-archiving policy. |
Keywords: | Thermal storage; Nanofluids; Phase change enthalpy; Specific heat; Thermal conductivity |
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) |
Funding Information: | Funder Grant number EU - European Union GA 706788 |
Depositing User: | Symplectic Publications |
Date Deposited: | 07 Feb 2019 10:39 |
Last Modified: | 12 Nov 2019 01:39 |
Status: | Published |
Publisher: | Elsevier |
Identification Number: | 10.1016/j.energy.2018.11.037 |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:142278 |