The preparation of paraffin/EVA/graphene phase change materials and its thermal properties analysis

摘要

In this paper, graphene/paraffin/EVA PCMs (GrPrE) was prepared by melting, blending andultrasonic dispersion method with a series of graphene mass fraction of 0.05%,0.1%,0.25%, and0.5%. The physical properties of GrPrE were characterized by SEM, DSC, and Hot-Disk. Theexperimental equipment of heat storage tester was built to test the thermal efficiency andperformance of GrPrE during the energy storage process. The result show ed that the GrPrE had agood performance in dispersion and stability. The temperature and latent heat of phase transitionhad no significant change. The thermal conductivity increased with the increasing of graphene massfraction. In the thermal storage test, the heat transfer rate of the graphene-added materials wasfaster than the unadded materials, the material which the proportion of graphene was 0.1% had thebest performance in the test. In summary, the composite can be a potential candidate for thermalstorage applications due to the good thermal properties and heat transfer performance.