Heat transfer on tube bundles embedded vertically in liquid‐fluidized beds |
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| Authors: | Kenichi Hashizume Akira Shirai Koichi Fukai Akihiro Fukagawa |
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| Affiliation: | Department of Intelligent Mechanical Engineering, Hiroshima Institute of Technology, Japan |
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| Abstract: | 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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| Keywords: | multiphase flow fluidized bed bed voidage heat transfer tube bundle liquid solid |
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