Analysis of heat pipe-aided graphene-oxide based nanoparticle-enhanced phase change material heat sink for passive cooling of electronic components

The present study involves the experimental investigation of the heat sink aided with nanoparticle-enhanced phase change material and heat pipe for the passive cooling of electronic components, thereby increasing the reliability of the working system. In this study, RT-35HC is used as the base phase change materials along with the incorporation of Graphene oxide nanoparticles (0.003 mass% and 0.005 mass%) for different heating loads i.e., 1 KW m⁻², 1.5 KW m⁻² and 2.5 KW m⁻². Results illustrated that after the charging phase, heat sink aided with nanoparticle-enhanced phase change material and heat pipe has shown the best results for lower heating loads of 1 KW m⁻², 1.5 KW m⁻², respectively, by showing the temperature reduction of 29.53% and 34.06% (at 1 KW m⁻²) and also 36.29% and 36.45% (at 1.5 KW m⁻²) for 0.003 mass% and 0.006 mass%, respectively. For high heat flux of 2.5 KW m⁻², phase change material/heat pipe-aided heat sink has shown the best combination i.e., showing a temperature reduction of 42.81%, respectively, whereas, for both the concentrations i.e., 0.003 mass% and 0.006 mass%, the reduction in the peak temperature of heat sink at the end of the charging process is 32.95% and 37.54%. Hence, RT-35HC-based nanoparticle-enhanced phase change material composite-aided heat sinks are best recommended for lower power levels whereas, at higher power levels the thermal conductivity reduces due to the particles agglomeration.