Premium
Heat transfer in packed and fluidized beds by the method of cyclic temperature variations
Author(s) -
Lindauer George C.
Publication year - 1967
Publication title -
aiche journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.958
H-Index - 167
eISSN - 1547-5905
pISSN - 0001-1541
DOI - 10.1002/aic.690130627
Subject(s) - fluidization , thermodynamics , mass transfer , packed bed , heat transfer coefficient , heat transfer , spheres , particle (ecology) , materials science , fluidized bed , chemistry , tungsten , mass transfer coefficient , mechanics , analytical chemistry (journal) , chromatography , metallurgy , physics , geology , oceanography , astronomy
Particle‐to‐gas heat transfer coefficients were determined in packed and fluidized beds with large diameter particles and high mass velocities using the cyclic temperature method. Experimental results for packed beds were satisfactorily correlated within 10% deviation as ε j h vs. N Re and were found to compare favorably with results of other experimenters obtained with much lower mass velocities and larger particles. The particle‐to‐gas heat transfer coefficient varied as G 0.60 for the steel spheres vs. G 0.66 for the tungsten spheres, and as D p −0.44 . Heat transfer coefficients obtained at minimum fluidization were in good agreement with those obtained with packed beds. As the mass velocity was increased above that required for minimum fluidization, heat transfer coefficients remained essentially constant.