This paper aimed to measure the thermal conductivity of pure eicosane, eicosane-CuO and eicosane-MWCNTs solid composites. A Thermal Constants Analyzer measured the thermal conductivity of the nanostructure-enhanced PCMs using the transient plane source (TPS) method. Results showed that the thermal conductivity increased rapidly as the temperature of the solid composites approached the melting point. Additionally, the samples that were solidified in an oven, and the eicosane-MWCNT samples experienced the largest ...