A new simulation is proposed for storage thermal energy using concentric cylinders filled with a phase change material PCM. The concentric cylinders are arranged where each two concentric cylinders are considered as insulated unit from the outer surface and exposed to internal flow. The numerical method is applied to solve the energy conservation equation of concentric cylinders of PCM using finite volume method with heat capacity method for latent heat of PCM. The fourth order Runge–Kutta method is used to solve the energy balance equation of heat transfer fluid. The effect of diameter ratio of concentric cylinders, initial temperature of PCM, inlet temperature of working fluid and Reynolds number are studied. The results are presented as the temperature distribution of PCM and melt fraction. The results illustrated that at take a constant volume of PCM (constant volume of the space between concentric cylinders) the low diameter ratio gives faster melting also, the inlet temperature of working fluid gives big effect on the melting process. The present results are validated with other work and give a good agreement.
International Journal of Applied and Computational Mathematics – Springer Journals
Published: Jun 4, 2018
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