Basic Studies on Fluidized Bed Heat Exchanger (Heat Transfer from Single Row of Horizontal Rectangular Tubes Immersed in Floating Low Density Particles) : Heat Transfer, Power, Combustion, Thermophysical Properties

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概要

• 論文の詳細を見る

• Using the low density particles (polystyrene hollow spheres) described in the 1st report, mean heat transfer coefficients from a single row of horizontal cylindrical tubes immersed in floating particles were measured, with the aim of reducing pressure drop in a fluidized bed heat exchanger. In this study, furthermore, in order to make particles float stably around tubes, rectangular tubes (aspect ratio: 30/3) were used because the change in flow area between the tubes is small; that is, the change in flow velocity between the tubes is small compared with that of cylindrical tubes. The results show that: 1 L_0/L_h≧1, and the mean heat transfer coefficients are independent of both L_0 and L_h, in the same way as with cylindrical tubes. 2 Mean heat transfer coefficients decrease slightly more than those with cylindrical tubes. 3 However, since rectangular tubes can be arranged more densely than cylindrical tubes, their thermal performance under the same pumping power is improved to about three times that of cylindrical tubes.

• 一般社団法人日本機械学会の論文
• 1987-08-15

著者

• Mabuchi Ikuo

  Faculty Of Engineering University Of Gifu

• Mabuchi Ikuo

  Faculty Engineering Gifu University

• Kumada Masaya

  Faculty Of Engineering Gifu University

• Kumada M

  Gifu Univ. Gifu Jpn

• Watanabe Yosinori

  Mitsubisi Heavy Industries Ltd. Nagoya Technical Institute

• Ogawa Ken

  Honda R&d Ltd.

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