Fluid dynamics of a fluidized bed packed with heat exchangers
Abstract
Tests of two fluidized bed facilities are described. Bed dynamics of a one foot gas fired fluidized bed (GFFB) and its interrelation with the heat transfer characteristics of immersed heat exchangers of different configurations were studied. The GFFB, capable of achieving different gas velocity distributions in the bed with the help of a specially designed gas distributor, was operated to gain useful information on the influence of various operating parameters, such as the superficial gas velocity and its profile, the bed temperature and pressure, and settled bed height, on the bed expansion and heat transfer characteristics of vertica and horizontal tube bundles, and an inverted U-tube. Tests were also performed on an inverted U-tube with longitudinal fins, and two unfinned inverted U-tubes to study the effect of heat exchanger solidity. Particle attrition studies were also performed at atmospheric pressure. A one-foot, coal-fired fluidized bed was also built and initial tests were performed. Typical heat transfer and particle attrition data were collected with a single vertical tube heat exchanger axially located in the bed. The behavior of deep and shallow beds, as observed in the GFFB, was confirmed.
- Publication:
-
State Univ. of New York, Stony Brook Report
- Pub Date:
- April 1981
- Bibcode:
- 1981suny.rept.....Z
- Keywords:
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- Fluid Dynamics;
- Fluidized Bed Processors;
- Heat Transfer;
- Chemical Engineering;
- Heat Exchangers;
- Independent Variables;
- Performance Tests;
- Fluid Mechanics and Heat Transfer