CFD-Based Multi-Objective Optimization of Straight-Fin Thermal Energy Storage Using MXene/BNNT–Erythritol Composite System

CFD-Based Multi-Objective Optimization of Straight-Fin Thermal Energy Storage Using MXene/BNNT–Erythritol Composite System

Ghulam RASOOL, Azim UDDIN, Zeeshan Ali BALOCH

Abstract. The research used CFD to study the system while performing multi-objective optimization on a rectangular LHTES unit containing bio-based erythritol and MXene/BNNT composite fin enhancements. The enthalpy–porosity method was used to simulate melting behavior and a finite-volume solver handled both natural convection and phase change processes. The Design of Experiments–Response Surface Methodology (DOE–RSM) framework optimized fin number, thickness, and span to achieve both fast charging and high storage capacity. The three-fin design configuration shortens total melting time by 60% while increasing stored energy to twice the level of the finless design. The research shows MXene/BNNT composites create better heat transfer paths which maintain their ability to store heat thus enabling developers to create efficient TES modules for solar and waste-heat recovery systems.

Keywords
Phase Change Material, MXene/BNNT Composite, CFD Simulation, Thermal Energy Storage, Response Surface Optimization, Natural Convection Melting, Erythritol

Published online 4/25/2026, 8 pages
Copyright © 2026 by the author(s)
Published under license by Materials Research Forum LLC., Millersville PA, USA

Citation: Ghulam RASOOL, Azim UDDIN, Zeeshan Ali BALOCH, CFD-Based Multi-Objective Optimization of Straight-Fin Thermal Energy Storage Using MXene/BNNT–Erythritol Composite System, Materials Research Proceedings, Vol. 64, pp 672-679, 2026

DOI: https://doi.org/10.21741/9781644904091-84

The article was published as article 84 of the book Energy Futures

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] Mengman Weng, Jiahui Lin, Yuanjun Yang, Jingtao Su, Jintao Huang, Xiang Lu, and Xinxin Sheng. Mxene-based phase change materials for multi-source driven energy storage, conversion and applications. Solar Energy Materials and Solar Cells, 272: 112915, August 2024. ISSN 0927-0248. http://dx.doi.org/10.1016/j.solmat.2024.112915.
[2] Han Sun, Yingai Jin, and Firoz Alam. Review: The application of mxene in thermal energy storage materials for efficient solar energy utilization. Materials, 18(12):2839, 20 June 2025. ISSN 1996-1944. http://dx.doi. org/10.3390/ma18122839
[3] Md. Shahriar Mohtasim and Barun K. Das. Mxene based composite phase change ma terials for thermal energy storage applications: Featuring bio-mimic approaches. Re newable and Sustainable Energy Reviews, 207:114952, January 2025. ISSN 1364-0321. http://dx.doi.org/10.1016/j.rser. 2024.114952
[4] Xiaoxin Yan, Yanhui Feng, Lin Qiu, and Xinxin Zhang. Thermal conductivity and phase change characteristics of hierarchical porous diamond/erythritol composite phase change materials. Energy, 233:121158, October 2021. ISSN 0360-5442. http://dx.doi.org/10.1016/j.energy.2021. 121158
[5] Xiaoqiao Fan, Lu Liu, Xin Jin, Wentao Wang, Shufen Zhang, and Bingtao Tang. Mx ene ti3c2tx for phase change composite with superior photothermal storage capability. Journal of Materials Chemistry A, 7(23):14319–14327, 2019. ISSN 2050-7496. http://dx.doi.org/10.1039/c9ta03962g
[6] Fuyan Peng, Xuhai Zhu, Rongjun Lin, Rui Lu, and Fang Lu. Advances in erythritol-based composite phase change materials. Sustainable Energy amp; Fuels, 8(7):1389–1404, 2024. ISSN 2398-4902. http://dx.doi.org/10. 1039/d4se00171k
[7] J. Chen, Y. Kou, K. Sun, H. Liu, X. Zhang, C. Fang, and Q. Shi. Shape-stable erythritol composite phase change materials with controlled latent heat release for spatiotemporally thermal energy utilization. Materials Today Sustainability, 22:100398, June 2023. ISSN 2589-2347. http://dx.doi.org/10. 1016/j.mtsust.2023.100398
[8] Chao Ma, Jing Wang, Yu Wu, Yongchao Wang, Zhijiang Ji, and Shuai Xie. Character ization and thermophysical properties of erythritol/expanded graphite as phase change 21 material for thermal energy storage. Journal of Energy Storage, 46:103864, February 2022. ISSN 2352-152X. http://dx.doi. org/10.1016/j.est.2021.103864
[9] Lin Qiu, Haimo Li, Jingna Zhao, Xiaoliang Zhang, Yanhui Feng, and Xiaohua Zhang. Hierarchical aln/erythritol composite phase change materials with ultra-efficient polarity enhanced heat conduction. Cell Reports Physical Science, 5(11):102297, November 2024. ISSN 2666-3864. http://dx.doi.org/ 10.1016/j.xcrp.2024.102297
[10] Sheng Yang, Yang-Yan Lai, Yue-Fei Wu, and Li-Wu Fan. Hydroxylated boron nitride enabled erythritol composite phase change material with highly increased thermal con ductivity and compensated heat storage density loss. Solar Energy Materials and Solar Cells, 282:113344, April 2025. ISSN 0927-0248. http://dx.doi.org/10.1016/j.solmat.2024.113344
[11] Siu N. Leung. Thermally conductive polymer composites and nanocomposites: Processing-structure-property relationships. Composites Part B: Engineering, 150:78–92, October 2018. ISSN 1359-8368. http://dx.doi.org/10.1016/j.compositesb.2018.05.056
[12] Yuxi Li, Le Zhao, Ziyu Chen, Xuelin Huang, Guangwu Zhang, Xue-Feng Yu, and Rui He. Sodium alginate/erythritol/¡scp¿d¡/scp¿-mannitol phase change materials for long term thermal energy storage and controllable release. ACS Omega, 10(31):35161–35169, July 2025. ISSN 2470-1343. http://dx. doi.org/10.1021/acsomega.5c04788
[13] Francisco Javier Gonz´alez Gallero, Gabriel Gonz´alez Siles, Ismael Rodr´ ıguez Maestre, Juan Luis Foncubierta Bl´azquez, and Michelle Bottarelli. Experimental validation of a simplified cfd model for a pcm-water finned heat exchanger. International Journal of Low-Carbon Technologies, 20, 2025. ISSN 1748-1325. http://dx.doi.org/10.1093/ijlct/ctae293