engleski

Experimental investigation of nano-enhanced phase change materials: Addition of Graphene into RT28 HC and RT26

The effect of nanomaterial addition (graphene) to the RT28 HC and RT26 phase change materials (PCM) was discussed and analyzed, with the focus on the thermal properties of nano- enhanced PCMs. The complexity of the nanocomposite preparation process was accentuated and briefly described and followed by a discussion of main issues that can significantly affect the accuracy of the obtained results. Graphene nanomaterial was added to the RT28 HC and RT26 in a 0.5 % mass fraction. Transient Plane Source (TPS) method was used to investigate the thermal constants of RT28 HC and RT26 phase change materials and graphene-enhanced nanocomposites. It was found that the addition of graphene nanoparticles either improves or reduces the thermal properties of the base PCM, such as thermal conductivity and thermal diffusivity while decreasing or increasing others such as volumetric specific heat capacity. The thermal conductivity and diffusivity were increased by 12.5 % and 15.8 %, while volumetric specific heat capacity was decreased by 3.8 % for RT28 HC. However, for RT26 thermal conductivity and diffusivity were decreased by 4.3 % and 24.7 % respectively, while volumetric specific heat capacity was increased by 16.4 %. Gained results could be helpful for consideration of graphene nano-enhanced PCMs in various engineering applications.

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