Direct-contact heat exchange between fluidizing particles and a heat transfer surface in a fluidized bed: Temperature visualization of fluidizing particles

Jun Yamada, Norihisa Nagahara, Isao Satoh, Yasuo Kurosaki

Research output: Contribution to journalArticle

5 Citations (Scopus)

Abstract

Heat conduction during contact between a heat transfer surface and fluidizing particles, a phenomenon which is one of the effective heat transfer mechanisms in a gas-solid fluidized bed, has been empirically investigated. The temperature profile of the fluidizing particles during the contact period is visualized with the aid of an infrared imager. The visualization reveals that the particles have been considerably heated in the thermal boundary layer on the heat transfer surface before contact. Based on the visualized temperature profile of the particles, the contact conductance between a fluidizing particle and the heat transfer surface is estimated by an in inverse analysis. Using the evaluated contact conductance, the contributions of the conductive heat transfer to the total heat transfer are also evaluated.

Original languageEnglish
Pages (from-to)165-181
Number of pages17
JournalHeat Transfer - Asian Research
Volume31
Issue number3
DOIs
Publication statusPublished - 2002 May
Externally publishedYes

Fingerprint

Fluidization
Fluidized beds
beds
Visualization
heat transfer
Heat transfer
heat
conductive heat transfer
temperature profiles
Temperature
temperature
thermal boundary layer
Image sensors
Heat conduction
Contacts (fluid mechanics)
Hot Temperature
Enthalpy
Boundary layers
Gases
Infrared radiation

Keywords

  • Contact conductance
  • Fluidized bed
  • Inverse analysis
  • Temperature visualization

ASJC Scopus subject areas

  • Fluid Flow and Transfer Processes

Cite this

Direct-contact heat exchange between fluidizing particles and a heat transfer surface in a fluidized bed : Temperature visualization of fluidizing particles. / Yamada, Jun; Nagahara, Norihisa; Satoh, Isao; Kurosaki, Yasuo.

In: Heat Transfer - Asian Research, Vol. 31, No. 3, 05.2002, p. 165-181.

Research output: Contribution to journalArticle

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