E3S Web Conf.
Volume 341, 20222022 7th International Conference on Green Materials and Environmental Engineering (GMEE2022)
|Number of page(s)||5|
|Published online||31 January 2022|
Thermal properties of the three-dimensional graphene/paraffin nanocomposite phase change materials
1 Key Laboratory of Low-grade Energy Utilization Technologies and Systems (Chongqing University), Ministry of Education, Chongqing, 400044, China
2 School of Energy and Power Engineering, Chongqing University. Chongqing, 400044, China
* Corresponding author: email@example.com
The excellent properties of graphene phase change nanocomposite made it have potential application value in the field of heat storage materials, which was expected to achieve the integration of heat transfer and storage. In order to enhance the thermal performance of paraffin in energy storage, the structure models of n-octadecane and three kinds of graphene/n-octadecane composites were established. Molecular dynamics method was used to study the variation of thermophysical properties. It is found that the strong interaction between graphene and noctadecane restricts the diffusion intensity of n-octadecane molecules, which reflects in the decreasing trend of the self-diffusion coefficient. In addition, the thermal conductivity of each system in the solid state is higher than that of liquid, and abruptly drops near the melting point. The thermal conductivity of the composite PCM always higher than the pure noctadecane and increases with the amount of graphene.
© The Authors, published by EDP Sciences, 2022
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