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Heat transfer coefficients between an immersed horizontal tube and an aerated vibratedfluidized bed are measured.There is a maximum value in the h-Γ experimental curve.The heattransfer coefficient increases with decreases in particle diameter in the fully fluidized region.Theparticle density has less effect on the heat transfer coefficients.High amplitude and low frequency,or low amplitude and high frequency are favorable to heat transfer.Exceedingly high gas velocityis unfavorable to the surfaces-bed heat transfer.A model based on the‘pocket’ theory was proposedfor predicting the surface-to-bed heat transfer coefficients in fully fluidized region.The predictionsfrom the model were compared with observed data.The reasonable fit suggests the adequacy of themodel.
Heat transfer coefficients between an immersed horizontal tube and an aerated vibrated fluidized bed are an maximum value in the h-Γ experimental curve. Heat heat transfer coefficient increases with decrease in particle diameter in the fully fluidized region. Particle density has less effect on the heat transfer coefficients. High amplitude and low frequency, or low amplitude and high frequency are favorable to heat transfer. Exceedingly high gas velocity is unfavorable to the surfaces-bed heat transfer. A model based on the ’pocket’ theory was proposed for predicting the surface -to-bed heat transfer coefficients in fully fluidized regions. The predictions from the model were compared with observed data. The reasonable fit suggests the adequacy of themodel.