Date of Award
Electrical and Computer Engineering
Investigations were conducted on the dynamic thermal responses of fluidized beds to changes in fluidized bed parameters. Dynamic thermal responses were characterized by the time constant in the first order exponential model of temperature response with time. Bed materials, bed particle size and reactor column size were varied over a· fairly wide range. Differences were found between the active (heating) and passive (cooling) time constants under otherwise identical conditions. It was found that time constants decay in an exponential manner with increasing superficial velocity. Models are presented for prediction of time constants, based on characteristics of the fluidized bed. Models are presented for prediction of heat transfer responses of ·fluidized beds. The heat transfer response model is derived from basic considerations of heat balance. The resulting expression ,in dimensionless form, is evaluated by bed parameters from the present study and compared with previously published_ results of other workers ,who presented empirical correlations. Excellent agreement is found
Pfafflin, James Reid, "Dynamic Thermal Responses of Fluidized Beds" (1971). Electronic Theses and Dissertations. 8666.