Latent heat energy storage technology (LHES) has the advantages of high heat storage density, stable phase change temperature and easy process control. The development of high-performance phase change materials is crucial to the use of thermal energy storage. In this study, physisorption is used to create a variety of paraffin wax (PA) based composite phase change materials (PCMs), employing expanded graphite (EG) and aluminum nitride (AlN) nanoparticles as fillers. The thermal conductivity of composite samples at 25 Â°C is measured based on the principle of steady-state heat flow method. Thermal characterization of the composite PCM by differential scanning calorimetry (DSC) showes the effect of EG and nano-AlN on the specific heat capacity of paraffin. The thermal conductivities of the prepared PCMs are 6.4-11.8 times that of PA. This is a guiding meaning for the preparation of composite PCMs with high specific heat and thermal conductivity.
Keywords composite phase change materials, specific heat capacity, thermal conductivity