Multi-mode heat transfer analysis during freezing of storage medium

No Thumbnail Available
Authors
Ramos Archibold, Antonio
Goswami, D. Yogi
Rahman, Muhammad M.
Stefanakos, Elias K.
Advisors
Issue Date
2015-05
Type
Article
Keywords
Thermal energy storage , Radiation heat transfer , Phase change material , Spherical shell , Solidification
Research Projects
Organizational Units
Journal Issue
Citation
Ramos Archibold, Antonio; Goswami, D. Yogi; Rahman, Muhammad M.; Stefanakos, Elias K. 2015. Multi-mode heat transfer analysis during freezing of storage medium. International Journal of Heat and Mass Transfer, vol. 84, May 2015:pp 600–609
Abstract

Simultaneous conduction, convection and thermal radiation have been analyzed during the freezing of a non-opaque, non-gray phase change material (PCM) encapsulated in a closed spherical container and heated at relatively high temperatures (250 T < 325 C). In contrast to the well-known conductiondominated model of the single phase Stefan problem, in the present study the influence of the participating thermal radiation and the buoyancy induced natural convection within the melt layer is highlighted and analyzed. A two-dimensional, axisymmetric, transient model has been solved numerically. The discrete ordinate method was used to solve the equation of radiative transfer and the finite volume scheme was used to solve the equations for mass, momentum and energy conservation. The effect of additional parameters like the shell size and the external heat transfer coefficient imposed on the outer shell surface as a boundary condition have also been analyzed. It was found that the contribution of thermal radiation on the solidification process of NaNO3 is to reduce the solidification time by 17% as compared with the limiting case where thermal radiation is neglected.

Table of Contents
Description
Click on the link to access the article (may not be free).
Publisher
Elsevier Ltd.
Journal
Book Title
Series
International Journal of Heat and Mass Transfer;v.84
PubMed ID
DOI
ISSN
0017-9310
EISSN