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Effect of probe size on heat transfer at the wall in circulating fluidized beds
Author(s) -
Nag P. K.,
Nawsher Moral M. Ali
Publication year - 1990
Publication title -
international journal of energy research
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.808
H-Index - 95
eISSN - 1099-114X
pISSN - 0363-907X
DOI - 10.1002/er.4440140907
Subject(s) - nusselt number , dimensionless quantity , heat transfer , reynolds number , mechanics , materials science , thermodynamics , fluidized bed , range (aeronautics) , suspension (topology) , particle size , chemistry , composite material , physics , turbulence , mathematics , homotopy , pure mathematics
An experimental investigation was made to study the effect of vertical probe height on heat transfer at the wall in circulating fluidized beds. Experiments were conducted in a 100 mm internal diameter, 5.15 m tall circulating fluidized bed. Four probes having 85, 127.5, 170 and 255 mm heights were tested. Heat transfer measurements covered a range of superficial velocity from 7.2 to 12.5 m/s and a range of suspension density from 25 to 68 kg/m 3 . The results were compared with those of other investigators. An empirical correlation incorporating the dimensionless probe height and the particle Nusselt number and Reynolds number has been suggested.