Affordable Access

Publisher Website

Numerical and experimental study of spherical capsules packed bed latent heat storage system

Authors
Journal
Applied Thermal Engineering
1359-4311
Publisher
Elsevier
Publication Date
Volume
22
Issue
15
Identifiers
DOI: 10.1016/s1359-4311(02)00080-7
Keywords
  • Heat Storage System
  • Spherical Solidification
  • Encapsulated Phase Change Material
  • Numerical Solution
Disciplines
  • Mathematics

Abstract

Abstract A numerical model to simulate a storage system composed of spherical capsules filled with PCM placed inside a cylindrical tank fitted with a working fluid circulation system to charge and discharge the storage tank. The simplified transient one-dimensional model is based on dividing the tank into a number of axial layers whose thickness is always equal or larger than a capsule diameter. It is also assumed that the temperature of the working fluid is uniform and equal to the average temperature of the layer. The solidification process inside the spherical capsule is treated by using a conductive one-dimensional phase change model with convective boundary condition on the external surface. The convection present in the liquid phase of the PCM is treated by using an effective heat conduction coefficient in the liquid region of the PCM. The solution of the differential equations is realized by the finite difference approximation and a moving grid inside the spherical capsules. The geometrical and operational parameters of the system are investigated both numerically and experimentally and their influence on the charging and discharging times was investigated.

There are no comments yet on this publication. Be the first to share your thoughts.