Abstract:
Lately TES systems for thermal applications, such as space
and water heating, air-conditioning, cooling, etc. have received
much attention. In TES system, energy is stored by changing
the temperature of a storage medium or employing the latent
heat of Phase Change Material (PCM). For a TES system, it is
important to have a charging velocity rather high, because for
an assigned system size, it is possible to obtain greater amount
of stored energy in less time. Therefore, the heat transfer
between the working fluid and the TES system should be
improved by increasing the surface exchange area.
In the present work a computational investigation on
thermal energy storage system using Phase Change Material
(PCM) is accomplished. The system is a set of different parallel
plates, half of them are filled with PCM and in the others the
working fluid, air, flows. Various configurations for different
channels per unit of length (CPL) are investigated. A
comparison between a direct model and a porous medium
model is carried out. The porous medium is modeled with the
Darcy-Forchheimer law. Numerical simulations are carried out
using the Ansys-Fluent code for the direct model with 2n
channels for direct and equivalent porous medium.
Description:
Papers presented at the 13th International Conference on Heat Transfer, Fluid Mechanics and Thermodynamics, Portoroz, Slovenia on 17-19 July 2017 .
