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Heat Transfer Characteristics and Particle Microscopic-Behavior around a Horizontal Tube Bundle in Fluidized Bed

Research Project

Project/Area Number 06650250
Research Category

Grant-in-Aid for General Scientific Research (C)

Allocation TypeSingle-year Grants
Research Field Thermal engineering
Research InstitutionYamaguchi University

Principal Investigator

MIYAMOTO Masahide  Yamaguchi University, Faculty of Engineering, Professor, 工学部, 教授 (20035059)

Project Period (FY) 1994 – 1995
Project Status Completed (Fiscal Year 1995)
Budget Amount *help
¥2,100,000 (Direct Cost: ¥2,100,000)
Fiscal Year 1995: ¥300,000 (Direct Cost: ¥300,000)
Fiscal Year 1994: ¥1,800,000 (Direct Cost: ¥1,800,000)
KeywordsFluidized Bed / Heat Transfer / Horizontal Tube Bundle / Particle Behavior / Particle Volume Fraction / Unsteady Heat Transfer / 非定常熱伝達
Research Abstract

The instantaneous heat transfer coefficient, particle volume fraction and particle velocity around a tube in a fluidized bed were simultaneously measured at the same location on the tube surface, using glass beads with average diameter of 0.42 mm and 1.0 mm as a fluidized particle.
The heat transfer tube was a phenolic circular cylinder, around which a stainless steel foil with 0.01 mm thickness was stuck to make uniform heat generation on the tube surface. A chromel-constantan thermocouple of 0.012 mm diameter was inserted between the thin foil and the phenolic tube. The instantaneous heat transfer coefficient was estimated from the measured thermocouple temperature, using the inverse heat conduction analysis. This measuring system can respond to a fluctuated heat transfer coefficient with a frequency lower than 40-50 Hz.
The particle volume fraction and particle velocity around a tube were measured by the optical fiber probe which was stuck on the tube surface.
The measured results were analyzed by the conditional averaging method, distinguishing particle contact from no particle contact. The relationship between the local average heat transfer coefficient and the particle volume fraction during particle contact, on the lower side surface of the tube for the 0.42 mm particle and on all the tube surface for the 1 mm particle, is consistent with the Kunii's large particle model. (The large particle means that its thermal time constant is sufficiently longer than its residence time at the tube surface)

Report

(3 results)
  • 1995 Annual Research Report   Final Research Report Summary
  • 1994 Annual Research Report
  • Research Products

    (7 results)

All Other

All Publications (7 results)

  • [Publications] M. Miyamoto, T. Takahashi, R. Jin, Y. Katoh and J. Kurima: "Unsteady Heat Transfer and Particle Behavior Around a Horizontal Tube Bundle Near an Expanded Bed Surface of a Gas Fluidized Bed : Conditional Sampling Statistical Analysis" International Journal of Heat and Mass Transfer. 38. 3263-3273 (1995)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1995 Final Research Report Summary
  • [Publications] M. Miyamoto, R. Jin, Y. Katoh AND J. Kurima: "Simultaneouw Measurements of Particle Behavior and Heat Transfer Characteristics around Horizontal Circular Tube in Fluidized Beds" 9th International Symposium on Transport Phenomena In Thermal-Fluids Engineering,. A. 352(発表予定). (1996)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1995 Final Research Report Summary
  • [Publications] M.Miyamoto, K.Takahashi, R.Jin, Y.Katoh and J.Kurima: ""Unsteady Heat Transfer and Particle Behavior Around a Horizontal Tube Bundle Near an Expanded Bed Surface of a Gas Fluidized Bed"" International Journal of Heat and Mass Transfer. Vol.38, No.17. 3263-3273 (1995)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1995 Final Research Report Summary
  • [Publications] M.Miyamoto, R.Jin, Y.Katoh and J.Kurima: "Simultaneous Measurements of Particle Behavior and Heat Transfer Characteristics around Horizontal Circular Tube in Fluidized Beds" 9th International Symposium on Transport Phenomena In Thermal-Fluids Engineering, (Paper No.A352). (1996)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1995 Final Research Report Summary
  • [Publications] M.Miyamoto,K.Takahashi,R.Jin,Y.Katoh,J.Kurima: "Unsteady Heat Transfer and Particle Behavior Around a Horizontal Tube Bundle Near an Expanded Bed Surface of a Gas Fluidized Bed" International Journal of Heat and Mass Transfer. 38. 3263-3273 (1995)

    • Related Report
      1995 Annual Research Report
  • [Publications] M.Miyamoto,R.Jin,Y.Katoh and J.Kurima: "Simultaneous Measurements of Particle Behavior and Heat Transfer Characteristics around Hoerizontal Circular Tube in Fluidized Beds" 9th International Symposium on Transport Phenomena In Thermal-Fluids Engineering,. A352(発表予定). (1996)

    • Related Report
      1995 Annual Research Report
  • [Publications] M.Miyamoto: "unsteady heat transfer and particle behavior around horizontal tube bundle near expanded bed surface of gas fluidized bed" Int.J.Hear Mass Transfer. (掲載予定).

    • Related Report
      1994 Annual Research Report

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Published: 1994-04-01   Modified: 2016-04-21  

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