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Author(s): , , , ,

Keywords: , , , , , , , ,

Abstract: This paper focuses on the creation of a new composite phase change material, paraffin-silica (SiO2)/graphene oxide (GO) through a two step process for potential use as a heat transfer fluid in direct absorption solar collectors. The resulting composite is composed of spherical capsules, and has the GO embedded within the SiO2 shell. Thermal conductivity testing with the Hot Disk TPS 2500 S revealed that the composites had excellent thermal characteristics and stability. A phase change slurry created through dispersal of the composite in water had high thermal conductivity and heat capacity, in addition to photo-thermal conversion capacities. The authors suggest that this could be a good potential solar energy storage material for solar collectors.

Reference: Solar Energy Materials and Solar Cells, 143 (December 2015) pp. 29-37

DOI: 10.1016/j.solmat.2015.06.034