Sublimation behavior of annular frost layer by impinging jet flow

Hideo Inaba, Akihiko Horibe, Naoki Takamoto, Yoshiaki Kawakami, Seishi Imai

Research output: Contribution to journalArticle

Abstract

The present paper has dealt with a new method of defrosting by using the frost sublimation phenomenon which occurs below the triple point of water (273.16 K, 610.5 Pa). The present experimental study has focussed to examine the mass transfer of the annular frost layer developed on a cooling pipe exposed to an impinging jet flow. Morphology of the frost layer during sublimating was observed by using a CCD camera. It was understood that the mass flux of the frost layer increased with increasing the jet flow velocity and the difference of the mass concentration of water vapor between the frost surface and the inpinging jet flow. The nondimensional correlation equations of mass transfer of defrosting were derived as functions of various parameters.

Original languageEnglish
Pages (from-to)2661-2668
Number of pages8
JournalNippon Kikai Gakkai Ronbunshu, B Hen/Transactions of the Japan Society of Mechanical Engineers, Part B
Volume66
Issue number650
Publication statusPublished - Oct 2000
Externally publishedYes

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Keywords

  • Defrost
  • Frost layer
  • Impinging jet flow
  • Mass transfer
  • Sublimation

ASJC Scopus subject areas

  • Mechanical Engineering
  • Condensed Matter Physics

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