01. Experimental/Computational Fluid Dynamics

Phase change material-based heat sinks are considered a practical solution for transient passive cooling of electronic packages and battery thermal management systems. This work analysed heat transfer in the solid-solid phase change material (SSPCM) composite-based cylindrical heat sink using the modified enthalpy porosity method incorporated in the numerical model. This study performs a numerical analysis of two-dimensional transient heat transfer in a cylindrical heat sink filled with SSPCM. Neopentyl Glycol (NPG) is used as the SSPCM, which undergoes the solid-to-solid transition from α phase to γ phase by absorbing thermal energy and releasing heat during the phase transition in the reverse direction. The cylindrical heat sink cavity is packed with SSPCM composite comprised of NPG with 3 w/w% of copper oxide (CuO) nanoparticles as the thermal conductivity enhancer. In this work, the effect of fin parameters of the heat sink and the heat dissipation rate over the safe operational time with a safe temperature limit of 80 ℃. The influence of fin length, cavity angle, fin angle, base width and the heat flux over the safe operational time and thermal energy storage utilisation are analysed in detail. From the numerical simulation results, the effect of heat flux and the fin parameters are evident over the safe operational period and the distribution of the phase transition fraction of the SSPCM composite. The SSPCM composite-based cylindrical heat significantly improved the safe operational time.