Conductive heat transfer between fluidizing particles and a heat transfer surface in a fluidized bed (visualization of temperature for fluidizing particles)

Jun Yamada, Norihisa Nagahara, Isao Satoh, Yasuo Kurosaki

Research output: Contribution to journalArticle

Abstract

Heat conduction during contact between a heat transfer surface and fluidizing particles, which is one of the effective heat transfer mechanisms in a gas-solid fluidized bed, has been empirically investigated. The temperatures of the fluidizing particles during the contact period are visualized by an infrared imager. This visualization reveals that the particles have been considerably heated in the thermal boundary layer on the heat transfer surface before the contact. Based on the visualized temperature of the particles, the contact conductance between a fluidizing particle and the heat transfer surface was estimated by an inverse analysis, and 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)2141-2149
Number of pages9
JournalNihon Kikai Gakkai Ronbunshu, B Hen/Transactions of the Japan Society of Mechanical Engineers, Part B
Volume66
Issue number648
Publication statusPublished - 2000 Aug
Externally publishedYes

Fingerprint

Fluidization
conductive heat transfer
Fluidized beds
beds
Visualization
heat transfer
Heat transfer
Temperature
temperature
thermal boundary layer
Image sensors
Heat conduction
Enthalpy
Boundary layers
Infrared radiation
gases
Gases

Keywords

  • Contact conductance
  • Direct contact heat exchange
  • Fluidized bed
  • Temperature visualization

ASJC Scopus subject areas

  • Mechanical Engineering
  • Condensed Matter Physics

Cite this

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abstract = "Heat conduction during contact between a heat transfer surface and fluidizing particles, which is one of the effective heat transfer mechanisms in a gas-solid fluidized bed, has been empirically investigated. The temperatures of the fluidizing particles during the contact period are visualized by an infrared imager. This visualization reveals that the particles have been considerably heated in the thermal boundary layer on the heat transfer surface before the contact. Based on the visualized temperature of the particles, the contact conductance between a fluidizing particle and the heat transfer surface was estimated by an inverse analysis, and using the evaluated contact conductance, the contributions of the conductive heat transfer to the total heat transfer are also evaluated.",
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T1 - Conductive heat transfer between fluidizing particles and a heat transfer surface in a fluidized bed (visualization of temperature for fluidizing particles)

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AU - Nagahara, Norihisa

AU - Satoh, Isao

AU - Kurosaki, Yasuo

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N2 - Heat conduction during contact between a heat transfer surface and fluidizing particles, which is one of the effective heat transfer mechanisms in a gas-solid fluidized bed, has been empirically investigated. The temperatures of the fluidizing particles during the contact period are visualized by an infrared imager. This visualization reveals that the particles have been considerably heated in the thermal boundary layer on the heat transfer surface before the contact. Based on the visualized temperature of the particles, the contact conductance between a fluidizing particle and the heat transfer surface was estimated by an inverse analysis, and using the evaluated contact conductance, the contributions of the conductive heat transfer to the total heat transfer are also evaluated.

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

KW - Contact conductance

KW - Direct contact heat exchange

KW - Fluidized bed

KW - Temperature visualization

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