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Generation of Water Channel During Melting Process of an Ice Packed Bed

[+] Author Affiliations
Kengo Murakami, Tatsunori Asaoka, Masashi Okada

Aoyama Gakuin University, Kanagawa, Japan

Yoshikazu Teraoka

Chuo University, Tokyo, Japan

Paper No. HT2009-88418, pp. 383-388; 6 pages
  • ASME 2009 Heat Transfer Summer Conference collocated with the InterPACK09 and 3rd Energy Sustainability Conferences
  • Volume 3: Combustion, Fire and Reacting Flow; Heat Transfer in Multiphase Systems; Heat Transfer in Transport Phenomena in Manufacturing and Materials Processing; Heat and Mass Transfer in Biotechnology; Low Temperature Heat Transfer; Environmental Heat Transfer; Heat Transfer Education; Visualization of Heat Transfer
  • San Francisco, California, USA, July 19–23, 2009
  • Conference Sponsors: Heat Transfer Division
  • ISBN: 978-0-7918-4358-1 | eISBN: 978-0-7918-3851-8
  • Copyright © 2009 by ASME


In the melting process of a packed bed of ice particles in an ice thermal storage tank, water channel is formed by non homogeneity melting. Water channel causes some problems such as the decrease of heat exchange rate and the increase of residual of ice. In this study, the generation of water channel during melting process of an ice packed bed was investigated. The experiment and numerical analysis of melting of an ice packed bed were performed in a two-dimensional model. In this model, water at 0°C flows through the ice packed bed continuously. In order to realize the non homogeneous melting, the ice packed bed was intentionally melted by a line heat source. In the experiment, the shape of melting front in the ice packed bed was observed on some typical conditions. The effects of the permeability and porosity distribution in the ice packed bed and the flow velocity of water on the shape of melting front were investigated in the numerical analysis. As a result, it was found that the growth rate of water channel is affected by the permeability in the ice packed bed and the flow velocity of water. It was also found that the results of the numerical analysis considering the porosity distribution of the packed bed correspond to the experimental results.

Copyright © 2009 by ASME



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