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Phase change materials (PCMs) can significantly utilize solar energy and enhance energy efficiency in buildings by storing thermal energy in latent heat form. However, a key obstacle to the broader adoption of Eicosane (EPCM) is its insufficient capacity to prevent leaks and facilitate heat transfer. This concept of blending EPCM, low-density polyethylene (PE), and expanded graphite (EG) is explored through hot melt extrusion (HME), offering an economical method for producing high-performance composite phase change materials (CPCMs). In this study, various blend formulations are extruded and examined for density, specific heat capacity , thermal conductivity , diffusivity , effusivity and latent heat thermal storage capacity of the CPCMs. After the EG is introduced at concentrations of 5, 10, and 15 wt% the thermal conductivity solid ratio increased by 58.7 %, 158.29 %, and 208.4 % and its liquid ratio also increased by 38.7 %, 72.5 %, and 193.6 %, respectively. In general, the enhanced heat transfer performance of the CPCMs in both phases is attributed. The CPCM, when combined with 40 % EPCM and 15 % EG, provided a high energy storage per unit mass. It possesses a large enthalpy of 118 kJ/kg and has the ability to prevent the release of Eicosane. The obtained results indicate a good potential for industrially applied CPCMs.
Trigui et al. (Thu,) studied this question.