An approach to develop a correlation for liquid-fluidized bed heat transfer

Hashizume, Kenichi

doi:10.1016/j.cep.2006.03.010

Cited by 8 publications

(7 citation statements)

References 20 publications

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“…For the heat transfer coefficient of the horizontally embedded tube bundles, Hashizume [11] proposed a correlation, similar to Eq. (8) Nu p = 1.05Re t 0.44…”

Section: Comparison Of Heat Transfer Coefficientmentioning

confidence: 98%

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Heat transfer on tube bundles embedded vertically in liquid‐fluidized beds

Hashizume

Shirai

Fukai

et al. 2009

Heat Trans. Asian Res.

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Bed voidage was measured in liquid‐fluidized beds having tube bundles embedded vertically in beds, and the heat transfer coefficient was measured on the outer surface of the tube. There were six kinds of test channels used, and a total of nine types of particles of glass and ceramics were tested. The measured bed voidage agreed well with those developed for in‐column fluidization, when the hydraulic equivalent diameter was used. Measured heat transfer coefficients on the vertically embedded tube bundles were higher than those on the vertically embedded single tubes, the calculated values for the in‐column fluidization, and the calculated values for the horizontally embedded tube bundles. Correlations for predicting the heat transfer coefficient were derived for the vertically embedded tube bundles and single tubes. © 2009 Wiley Periodicals, Inc. Heat Trans Asian Res; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/htj.20267

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“…For the heat transfer coefficient of the horizontally embedded tube bundles, Hashizume [11] proposed a correlation, similar to Eq. (8) Nu p = 1.05Re t 0.44…”

Section: Comparison Of Heat Transfer Coefficientmentioning

confidence: 98%

“…Furthermore, Hashizume [11] let the fluidizing condition be a liquid single-phase flow, when the heat transfer coefficient calculated by Eq. (8) becomes smaller than that of the liquid single-phase flow.…”

Section: Comparison With Existing Correlationsmentioning

confidence: 99%

Heat transfer on tube bundles embedded vertically in liquid‐fluidized beds

Hashizume

Shirai

Fukai

et al. 2009

Heat Trans. Asian Res.

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“…The term (d p / D) in Eqs. (15) and (16) does not express the effect of the wall, but comes from the definition of the introduced Archimedes number. Rewriting Eq.…”

Section: Analogy Between Pressure Drop and Heat Transfer In Liquid-somentioning

confidence: 99%

“…The frictional pressure drop is the sum of the frictional pressure drop due to liquid, Eq. (15), and due to particles, Eq. (16), that is…”

Section: Analogy Between Pressure Drop and Heat Transfer In Liquid-somentioning

confidence: 99%

“…These plotted points are well approximated by the following correlations: and (D/l) is the non-dimensional riser diameter. In conventional fluidized beds, the column diameter or the embedded tube diameter became an independent parameter for the heat transfer, and the heat transfer coefficient could be expressed using this non-dimensional diameter [15]. When the plotted points for D = 24 mm and D = 12 mm are compared in Fig.…”

Section: Analogy Between Pressure Drop and Heat Transfer In Liquid-somentioning

confidence: 99%

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Analogy between pressure drop and heat transfer in liquid–solid circulating fluidized beds

Hashizume

Kimura

Morita

2009

Heat Trans. Asian Res.

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An analogy was found between the frictional pressure drop and the heat transfer in liquid-solid circulating fluidized beds. This investigation is based on the predicting correlations for the particle holdup, the heat transfer coefficient, and the pressure drop, which were all developed by the authors. When the heat transfer coefficients were expressed in terms of the modified j-factor, then a close mutual relationship was observed between the modified j-factor and the friction factor of the pressure drop due to liquid and particle flow. A correlation to express this mutual relationship was derived, which consists of the density ratio of particle to liquid and the non-dimensional riser diameter. The heat transfer coefficient predicted from the derived correlation agreed well with the experimental data by the authors, and with existing data.

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