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Thermal characterisation of binary sodium/lithium nitrate salts for latent heat storage at medium temperatures
Latent heat storage in molten salt mixtures has been considered as a promising method for medium temperature solar thermal storage and industrial waste heat storage. The binary sodium/lithium nitrate salt mixture is one of the potential candidate materials. However there is limited information on their thermal performance except for their phase diagrams. In this paper, two binary salts, NaNO3–LiNO3 (46–54%) and NaNO3–LiNO3 (40–60%), were investigated to assess their suitability for medium temperature heat storage. The thermal properties and long term stability under multiple cycles of each binary salt pair were investigated using Differential Scanning Calorimetry (DSC). The chemical stability at elevated temperatures was tested using a Thermogravimetric Analyser (TGA). Both binary salts analysed have suitable melting temperatures (just under 200 °C) with relatively high latent heat values (>220 kJ/kg), both exhibiting good thermal and chemical stability.
Funding
The research presented in this paper is funded by the Enigneering and Physical Sciences Research Council (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
Published in
Solar Energy Materials and Solar CellsVolume
157Pages
1019 - 1025Citation
ZHOU, D. and EAMES, P., 2016. Thermal characterisation of binary sodium/lithium nitrate salts for latent heat storage at medium temperatures. Solar Energy Materials and Solar Cells, 157, pp. 1019 - 1025.Publisher
© 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
2016-08-15Publication date
2016Notes
This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/4.0/). The research data associated with this article can be found at: 10.17028/rd.lboro.3582471.ISSN
0927-0248Publisher version
Language
- en