Mechanism of radiative heat transfer between fluidizing particles and a cooled surface in a fluidized bed

Jun Yamada, Yasuo Kurosaki, Takanori Nagai

Research output: Contribution to journalArticle

Abstract

We experimentally investigated the radiation heat transfer occurring in a gas-solid fluidized bed between the fluidizing particles and a cooled heat transfer surface. To evaluate this heat transfer, radiation emitted from fluidizing particles to the cooled surface was measured using an infrared (IR) camera, which is located external to the bed so as not to disturb the bed fluidization. By doing this, the cooled surface was made of transparent CaF 2, and was cooled by air convection. Our results revealed that there exist cooled fluidizing particles adjacent to the surface and they suppress the radiation heat transfer between the surface and high temperature fluidizing particles in the depth of the bed. In addition, the effects of the fluidizing velocities, the radiative characteristics, and the particle diameter on the radiation transfer were clarified.

Original languageEnglish
Pages (from-to)727-733
Number of pages7
JournalNihon Kikai Gakkai Ronbunshu, B Hen/Transactions of the Japan Society of Mechanical Engineers, Part B
Volume65
Issue number630
DOIs
Publication statusPublished - 1999 Jan 1

Keywords

  • Dispersed medium
  • Fluidized bed
  • Radiative heat transfer
  • Visualization

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Mechanical Engineering

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