NUMERICAL STUDY OF THE TRANSIENT HEAT TRANSFER ERMAL ENERGY STORAGE SYSTEM BASED PCM

Abstract

In this paper, the unsteady state heat transfer through the thermal energy storage system is investigated numerically by using finite difference method in order to study the optimum thermaldesign of the latent heat thermal storage. The present analysis takes into account the heat transfer intwo dimensions for fluid, tube and the PCM. The conical shape of the PCM is examined here fordifferent diameters depending on the cone angle (ψ). The results of the present study are comparedwith other study to confirm the accuracy. Results of a numerical case study are presented anddiscussed. The results show that the decreasing the value of (ψ) will increase the hot and cold fluidseffectivenesses and the difference between the effectiveness (hot and parallel cold and counter cold)increased with decreased value of (ψ) in the negative range (ψ = -0.13 deg). The counter flow forthe cold fluid produce higher effectiveness than the parallel flow for the cold fluid especially for thenegative value of (ψ = - 0.13 - 0 deg).