固・液流動層の熱伝達特性 : 粒子と液相の密度差が小さい場合の検討

概要

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An experimental study has been carried out to determine the heat transfer characteristics of solid-liquid fluidized bed in the case of small density difference between particle and liquid. By using low density difference particles, it may be able to fluidize at low velocity and reduce the power of fluidization. In the present study, a bundle of horizontal heated tubes was situated in the fluidized bed which was formed by downward forced flow of water and particles. Flow condition, void fraction of particle bed, and local/average heat transfer coefficient around the heated tubes were observed and measured. The effects of flow velocity, thermophysical properties of particles, particle diameter, heated tube diameter, pitch of heated tubes, and temperature of water on the heat transfer characteristics were extensively determined. It was found that both diameter and specific weight of particles exerted considerable effects on the heat transfer performance.
社団法人日本機械学会の論文
2000-03-25