Experimental investigation of an elliptical enclosure for a latent heat thermal energy storage

Experimental investigation of an elliptical enclosure for a latent heat thermal energy storage

Anwar ALSHURAIFAT, Ali RADWAN, Salah HARIDY, Aasim AHMED

Abstract. This study experimentally investigates the melting behavior of a paraffin-based Phase Change Material (PCM) in a vertical elliptical container as an alternative to traditional circular designs. The thermal conductivity of the PCM was measured, and a series of experimental tests evaluated the thermal response of PCM melting under controlled heating fluid temperatures. The melting profile and temperature distribution were systematically recorded and analyzed over an eight-hour period. Results demonstrated that increasing the temperature of the heating fluid enhances the melting rate. After eight hours of thermal energy charging with heating fluid temperatures of 75 °C, 80 °C, and 85 °C, the average PCM temperature reached approximately 51.9 °C, 53.7 °C, and 57.3 °C, respectively. These findings provide experimental validation for the potential of non-traditional geometries to enhance PCM melting performance in Latent Heat Thermal Energy Storage systems.

Keywords
Latent Heat Thermal Energy Storage, Phase Change Materials, Elliptical Enclosure Design, Melting Behavior

Published online 6/20/2026, 7 pages
Copyright © 2026 by the author(s)
Published under license by Materials Research Forum LLC., Millersville PA, USA

Citation: Anwar ALSHURAIFAT, Ali RADWAN, Salah HARIDY, Aasim AHMED, Experimental investigation of an elliptical enclosure for a latent heat thermal energy storage, Materials Research Proceedings, Vol. 67, pp 547-553, 2026

DOI: https://doi.org/10.21741/9781644904176-72

The article was published as article 72 of the book Climate Action and Sustainability

Content from this work may be used under the terms of the Creative Commons Attribution 3.0 license. Any further distribution of this work must maintain attribution to the author(s) and the title of the work, journal citation and DOI.

References
[1] N. Parsa, B. Kamkari, and H. Abolghasemi, Enhancing thermal performance in shell-and-tube latent heat thermal energy storage units: An experimental and numerical study of shell geometry effects, International Communications in Heat and Mass Transfer, 154 (2024) 107398. https://doi.org/10.1016/j.icheatmasstransfer.2024.107398
[2] R. Qaiser, M.M. Khan, L.A. Khan, M. Irfan, and K. Hooman, Melting performance enhancement of PCM based thermal energy storage system using multiple tubes and modified shell designs, Case Studies in Thermal Engineering, 27 (2021) 101198. https://doi.org/10.1016/j.est.2020.102161
[3] E. Faghani, A.H. Mahmoudi, and M.B. Shafii, Numerical simulation of melting between two elliptical cylinders, Alexandria Engineering Journal, 57 (2018) 613-626. https://doi.org/10.1016/j.aej.2017.02.003
[4] G. Yang, Y.-J. Yim, J.W. Lee, Y.-J. Heo, and S.-J. Park, Carbon-filled organic phase-change materials for thermal energy storage: A review, Molecules, 24 (2019) 2055. https://doi.org/10.3390/molecules24112055
[5] M. Mäkelä, Experimental design and response surface methodology in energy applications: A tutorial review, Energy Conversion and Management, 151 (2017) 630-640. https://doi.org/10.1016/j.enconman.2017.09.021
[6] S.S. Mousavi Ajarostaghi, M. Zaboli, H. Javadi, B. Badenes, and J.F. Urchueguia, A review of recent passive heat transfer enhancement methods, Energies, 15 (2022) 986. https://doi.org/10.3390/en15030986
[7] B. Kamkari and H. Shokouhmand, Experimental investigation of phase change material melting in rectangular enclosures with horizontal partial fins, International Journal of Heat and Mass Transfer, 78 (2014) 839-851. https://doi.org/10.1016/j.ijheatmasstransfer.2014.07.056
[8] F. Agyenim, P. Eames, and M. Smyth, A comparison of heat transfer enhancement in a medium temperature thermal energy storage heat exchanger using fins, Solar Energy, 83 (2009) 1509-1520. https://doi.org/10.1016/j.solener.2009.04.007
[9] V. Safari, H. Abolghasemi, and B. Kamkari, Experimental and numerical investigations of thermal performance enhancement in a latent heat storage heat exchanger using bifurcated and straight fins, Renewable Energy, 174 (2021) 102-121. https://doi.org/10.1016/j.renene.2021.04.076
[10] G.S. Sodhi, A.K. Jaiswal, K. Vigneshwaran, and P. Muthukumar, Investigation of charging and discharging characteristics of a horizontal conical shell and tube latent thermal energy storage device, Energy Conversion and Management, 188 (2019) 381-397. https://doi.org/10.1016/j.enconman.2019.03.022
[11] A.M. Abdulateef et al., Enhancing the melting of phase change material using a fins-nanoparticle combination in a triplex tube heat exchanger, Journal of Energy Storage, 35 (2021) 102227. https://doi.org/10.1016/j.est.2020.102227