Natural convection heat transfer of latent heat storage type microcapsule slurry in a rectangular cavity with two opposing heating and cooling vertical walls

Hideo Inaba, Kouichi Matsuo, Akihiko Horibe

Research output: Contribution to journalArticlepeer-review

Abstract

This paper has dealt with the natural convection heat transfer of the microcapsule slurry composed of phase change material (PCM) as a latent heat storage substance. A rectangular cavity with two opposing heating and cooling vertical walls was selected as the present research model. The temperature difference between heating and cooling walls, the width of the cavity and the PCM concentration were set as parameters of natural convection heat transfer. The heat transfer coefficient of heating and cooling wall, the flow velocity profile and the temperature distribution of the microcapsule slurry were calculated by numerical computation. It was clarified that the transportation of latent heat evolved by melting and solidifying of the PCM in the slurry exerted on a strong influence on the natural convection heat transfer. Moreover, it was found that the heat transfer coefficient reached at the local maximal value with an increase in temperature difference between heating and cooling walls. In addition, Nusselt number was influenced by the transportation effect of latent heat that was caused by melting and solidifying of the PCM. The numerical results revealed quantitatively that the natural convection heat transfer depended on the PCM concentration, temperature difference between heating and cooling walls, and width of the rectangular cavity.

Original languageEnglish
Pages (from-to)2122-2129
Number of pages8
JournalNippon Kikai Gakkai Ronbunshu, B Hen/Transactions of the Japan Society of Mechanical Engineers, Part B
Volume69
Issue number685
DOIs
Publication statusPublished - Sep 2003
Externally publishedYes

Keywords

  • Heat transfer
  • Microcapsule slurry
  • Natural convection
  • Numerical analysis

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Mechanical Engineering

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