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Heat transfer from a grid jet in a large fluidized bed
Author(s) -
Behie L. A.,
Bergougnou M. A.,
Baker C. G. J.
Publication year - 1975
Publication title -
the canadian journal of chemical engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.404
H-Index - 67
eISSN - 1939-019X
pISSN - 0008-4034
DOI - 10.1002/cjce.5450530104
Subject(s) - nozzle , froude number , fluidized bed , jet (fluid) , heat transfer , reynolds number , materials science , mechanics , thermodynamics , quenching (fluorescence) , cracking , composite material , physics , flow (mathematics) , turbulence , optics , fluorescence
Abstract Heat transfer from a vertical grid jet within a 2 ft diameter and 4 ft deep fluidized bed of cracking catalyst was studied. The test nozzle diameter was varied from ¼ to 1 in. and the nozzle velocity from 50 to 250 ft /sec which is within the range of industrial practice. The axial temperature data have been related to a Froude, a Reynolds and a Nozzle number: In (δT/δT o ) = –58.1 Fr −0.562 No 1.08 Re −0.112 A simple jet quenching model yielded heat transfer coefficients between the fluid bed and grid jet which ranged from 300 to 1200 Btu/ft 2 hr. o F.