Heat storage modeling for air ventilation usage considering freezing of paraffin through a sinusoidal duct

In this article, sinusoidal layers of PCM through air ventilation were employed. Current unsteady process with neglecting gravity impact is simulated by Finite volume method. Temperature of all zones is 303.15 K at t = 0 and PCM zones contain liquid RT28. Six cases were tested and three of them have various configurations for air gap arguments. Dispersing CuO nanoparticles (φ = 0.05) makes the required time for freezing to decrease about 5.55 %. With changing the shape of PCM zone to wavy duct, full solidification time decreases about 23.52 %. With insertion of air gaps, adding CuO nanoparticles (φ = 0.05) and considering sinusoidal duct, the needed time reduces about 44.44 %. The highest case in view of freezing time is first case. With increase of time, temperature of PCM reduces with heat releasing to air. With insertion of air gaps and sinusoidal wall, the outlet temperature decreases about 0.379 % at the end of discharging.