Latent Heat Release Characteristics of Solid-liquid Phase Change Heat Storage Microcapsule Slurry by Condensation Heat of Vapor under a Vacuum Condition

Masatoshi Katayama, Hideo Inaba, Akihiko Horibe, Naoto Haruki, Tsuyoshi Manabe

Research output: Contribution to journalArticle


Recently, studies have begun on a functional heat transfer medium using fine spherical microcapsules encapsulated with phase-change material and dispersed in water. This enables the medium to maintain fluidity whether the phase-change material is solid or liquid. The present study has clarified the laten-heat storage characteristics of microcapsule slurry by increasing its heat transfer coefficient with the help of evolved heat condensing of vapor from the slurry in heat storage. Paraffin wax with the melting point of 62°C was encapsulated into the fine microcapsules and used as a phase-change material. The cooling coil surface temperature and concentration of paraffin in the microcapsule slurry were selected as the experimental parameters. As a result, the non-dimensional correlation equations of the heat release completion time and heat transfer coefficient were derived in terms of non-dimensional parameters.

Original languageEnglish
Pages (from-to)444-451
Number of pages8
JournalNippon Kikai Gakkai Ronbunshu, B Hen/Transactions of the Japan Society of Mechanical Engineers, Part B
Issue number690
Publication statusPublished - Feb 2004
Externally publishedYes



  • Film Condensation
  • Heat Release
  • Latent Heat Storage
  • Microcapsule slurry
  • Phase Change Material
  • Subcooled Boiling

ASJC Scopus subject areas

  • Mechanical Engineering

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