Prediction of heat transfer in prototype fluidized reactors from scale-model data

 Scott P. Overmann^a, Robert C. Brown^b, and Nanak S. Grewal^c
aTexas Instruments Incorporated, 2501 West University, P.O. Box 801, MS 8075, McKinney, TX 75070 USA
^bIowa State University, Department of Mechanical Engineering, 2025 H.M. Black, Ames, IA 50011 USA
^cUniversity of North Dakota, Department of Mechanical Engineering, Grand Forks, ND 58202, USA

Chemical Engineering Science 53, 807-817, 1998

ABSTRACT
 
The goal of this research was to predict heat transfer in a prototype-fluidized bed from data obtained in a hydrodynamically scaled model bed. Experimental heat transfer data measured in the model bed (45 mm diameter) was used in conjunction with simple, mathematical models to deduce particle residence time in the model bed.  Residence time for the prototype bed (95-mm diameter) was estimated by scaling model bed residence times.  This data, in turn, was used to predict heat transfer in the prototype bed.  This methodology yielded predictions that are within 15% of experimental data obtained in the prototype bed.  Particle properties were varied by using steel and bismuth while gas properties were varied by using nitrogen and carbon dioxide.

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