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A study of a eutectic salt of lithium nitrate and sodium chloride (87–13%) for latent heat storage

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journal contribution
posted on 2017-04-26, 08:17 authored by Dan Zhou, Philip EamesPhilip Eames
Latent heat storage in salt mixtures has attracted much attention as it can store a large amount of heat within a small temperature range in a small volume compared to sensible heat storage. In this paper, the eutectic salt of LiNO3–NaCl (87–13%) was investigated to evaluate its potential for latent heat storage for medium temperature range applications (<300 °C). The eutectic salt was prepared using the indirect mixing method. Its thermal properties including melting temperature and latent heat were measured over multiple cycles using Differential Scanning Calorimetry (DSC). The measurements show that the eutectic salt of LiNO3–NaCl (87–13%) has a suitable melting temperature (around 220 °C) and a relatively high latent heat (>290 kJ/kg). Its thermal decomposition temperature was tested using a Thermogravimetric Analyser (TGA). The salt mixture exhibits an excellent chemical stability below 400 °C with no changes after tests of multiple cycles with DSC and TGA. The main factors affecting the economic feasibility for this eutectic salt were also discussed.

Funding

EPSRC through Grant reference EP/K011847/1, Interdisciplinary centre for Storage, Transformation and Upgrading of Thermal Energy (i-STUTE).

History

School

  • Mechanical, Electrical and Manufacturing Engineering

Research Unit

  • Centre for Renewable Energy Systems Technology (CREST)

Published in

Solar Energy Materials and Solar Cells

Volume

167

Pages

157 - 161

Citation

ZHOU, D. and EAMES, P., 2017. A study of a eutectic salt of lithium nitrate and sodium chloride (87–13%) for latent heat storage. Solar Energy Materials and Solar Cells, 167 pp. 157 - 161

Publisher

© 2017 The Authors. Published by Elsevier B.V.

Version

  • VoR (Version of Record)

Publisher statement

This work is made available according to the conditions of the Creative Commons Attribution 4.0 International (CC BY 4.0) licence. Full details of this licence are available at: http://creativecommons.org/licenses/ by/4.0/

Acceptance date

2017-04-06

Publication date

2017

Notes

This is an open access article under the CC BY license (http://creativecommons.org/licenses/BY/4.0/).

ISSN

0927-0248

Language

  • en

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