Effect of Charging and Discharging Process of PCM with Paraffin and Al₂O₃ Additive Subjected to Three Point Temperature Locations

Abstract

This analysis focused on investigating thermal storage behaviour on phase change material along with Al 2 O 3 as an additive. The experimental investigation was performed by three set temperature points, i.e. 40 °C, 50 °C and 60 °C with the mass circulation rate through the tank of 5 kg/min, 3 kg/min and 2 kg/min. The forced circulation method was used to circulate the liquid, water was used as a working medium and Al 2 O 3 as nano particle. Paraffin acts a phase change material to conduct the experimental procedure. The combination of paraffin with Al 2 O 3 improves the latent heat storage of the material. The performance, with respect to charging and discharging of the material, was investigated and it was observed that the temperature location point of 50 °C shows the best results in terms of charging and discharging phenomena, compared to other two temperature location points. During the process of charging, the maximum rate of heat transfer can be achieved by Al 2 O 3 nanofluids. Paraffin along with Al 2 O 3 are characterized by the best thermal storage behaviour during the latent heat storage at charging process and dissipation of heat during discharge process. The rapid cooling comparison for three set location points has been studied and best solidification was achieved at the point of 60 °C; this is due to the rapid cooling at higher elevation temperatures. The energy that was stored in thermal form is to be transferred with the aid of heat exchanger, a special type heat exchanger employed in this analysis to transfer the heat. From this analysis it is concluded that paraffin with Al 2 O 3 are characterized by the best performance in terms of the charging and discharging phenomenon.

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