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Conflict of Interest
In relation to this article, we declare that there is no conflict of interest.
Publication history
Received January 2, 2024
Accepted March 24, 2024
articles This is an Open-Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/bync/3.0) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.
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Superior Thermal Conductivity and Charging Performance of Zinc Oxide Dispersed Paraffin Wax for Thermal Energy Storage Applications

ABCDE Innovation Centre, Centre for Energy Storage & Conversion, Centre for Nanotechnology and Advanced Biomaterials (CeNTAB), School of Chemical and Biotechnology , SASTRA Deemed University
ksrajan@chem.sastra.edu
Korean Journal of Chemical Engineering, August 2024, 41(8), 2389-2404(16), https://doi.org/10.1007/s11814-024-00163-9

Abstract

Organic phase change materials (PCM) such as paraffi n wax have lower thermal conductivity, compromising the rate of heat

transfer during charging and discharging. This work reports the improvement of the thermal conductivity of paraffi n wax

through dispersion of ZnO nanoparticles and its outcome in terms of heat transfer performance. ZnO–paraffi n wax (ZnO–PW)

nanocomposites were made by dispersing ZnO nanoparticles in paraffi n wax. An increase in thermal conductivity (76.4% for

10 wt. % nanocomposite) and reduction in specifi c heat (10.7% for 10 wt. % nanocomposite) upon nanoparticles’ addition to

paraffi n wax were observed. In a fi rst-of-its-kind work, we manifested that the improved thermal conductivity of ZnO–PW

nanocomposites, combined with potential improvements in liquid-phase thermal conductivity, resulted in a 96% increase in

the PCM side heat transfer coeffi cient in a tube-in-shell thermal energy storage unit operating under constant heat transfer

fl uid temperature. Thus, our fi ndings clearly show an increase in the thermal energy storage performance of a latent heat

thermal energy storage system (LHTES) using ZnO–PW nanocomposites as the energy storage medium.

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