Kalidasan, Balasubramanian * and Pandey, Adarsh Kumar * and Hakim, Imansyah Ibnu and Putra, Nandy Setiadi Djaya and Muhammad Naufal Faris Herviadi and Tan, Kim Han * and Saidur, Rahman * (2026) Evaluation of sustainable longan shell biochar energized commercial organic phase change material for low temperature thermal regulation. Thermal Science and Engineering Progress, 73. pp. 1-11. ISSN 2451-9049
Full text not available from this repository. (Request a copy)Abstract
Biochar, lauded for its plentiful raw material availability, compatibility with biological systems, and eco-friendliness, has proven effective in boosting the thermal conductivity of phase change materials (PCMs) and enhancing heat transfer in thermal systems. This paper introduces a distinctive eco-friendly composite PCM with improved thermal conductivity, optical absorbance, and thermal stability, achieved by dispersing laboratory-synthesized longan shell biochar (LSB) using carbonization and melting-mixing methods. LSB microparticles of 0.15–0.16 μm were dispersed at different weight fractions of (0.3; 0.6; 0.9; 1.2 and 1.5 wt%) blended with commercial octadecane to further enhance the optical and thermophysical behavior. The morphological characteristics, microstructure, optical absorbance and transmittance and thermal properties are characterized. Among the analyzed composites, the octadecane +1.2LSB composite exhibited exceptional chemical compatibility, a significant increase in optical absorbance (from 0.212 to 0.735), and a thermal conductivity enhancement of 97.89% (from 0.142 W/(m⋅K) to 0.281 W/(m⋅K)) compared to octadecane; notably, this composite showed a melting enthalpy of 239 J/g without any compensation. The layered sheet-like 3D morphology of LSB along with the mesoporous and micropore surface features a network of sponge-like texture that facilitates the base for stronger intermolecular interaction with the octadecane matrix. Subsequently, the porous structure also contributes to effectively retaining the incident solar rays that enhance the optical absorbance of the composite. The research findings imply that the engineered composite has substantial promise for use in low temperature thermal regulation, presenting an effective and sustainable solution for energy management.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | biochar; composite phase change material; longan Shell; thermal energy storage; thermal performance |
| Subjects: | T Technology > TJ Mechanical engineering and machinery |
| Divisions: | Sunway University > Faculty of Engineering and Technology [formerly School of Engineering and Technology until 14 November 2025; School of Science and Technology until 2020] > Research Centre for Nano-Materials and Energy Technology Sunway University > Faculty of Engineering and Technology [formerly School of Engineering and Technology until 14 November 2025; School of Science and Technology until 2020] > Sunway Centre for Electrochemical Energy and Sustainable Technology [formerly Graphene and Advanced 2D Materials Research Group until June 2023] |
| Depositing User: | Ms Yong Yee Chan |
| Related URLs: | |
| Date Deposited: | 24 Apr 2026 09:30 |
| Last Modified: | 12 Jun 2026 03:52 |
| URI: | http://repository.sunway.edu.my/id/eprint/3321 |
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