Heat Transfer Between Immersed Horizontal Tubes and Aerated Vibrated Fluidized Beds  

作　　者：叶世超 李川娜 陈匡民 

出　　处：《Chinese Journal of Chemical Engineering》1999年第2期116-125,共10页中国化学工程学报（英文版）

基　　金：Supported by the National Natural Science Foundation of China(No.29576253).

摘　　要：Heat transfer coefficients between an immersed horizontal tube and an aerated vibrated fluidized bed are measured. There is a maximum value in the h-P experimental curve. The heat transfer coefficient increases with decreases in particle diameter in the fully fluidized region. The 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 surface-bed heat transfer. A model based on the 'pocket' theory was proposed for predicting the surface-to-bed heat transfer coefficients in fully fluidized region. The predictions from the model were compared with observed data. The reasonable fit suggests the adequacy of the model.Heat transfer coeffients between an immersed horizontal tube and an aerated vibrated fluldlzed bed are measured. There is a maximum value in the h-Г experlmental curve. The heat trander coefllcient increases with decreases in particle diameter in the fully fluidized region. The particle density has less effect on the heat transfer coetftclents. High smplltude and low frequency, or low amplitude and high frequency are favorable to heat transit. Exceedingly high gas veloclty is unfavorable to the surface-bed heat transfer. A model based on the 'pocket' theory was proposed for predicting the surface-to-bed heat trausfer coefllclents in fully fluldlzed region. The predlctlons from the model were compared with observed data The reasonable fit suggests the adequacy of the model.

关 键 词：vibration heat transfer vibration fluidization heat transfer VIBRATION FLUIDIZATION 

分 类 号：TQ021[化学工程] TQ051.13