Heat Transfer in a Countercurrent, Gas–Solid, Packed Column

A theoretical model has been used, in conjunction with pressure drop and solid holdup data, to predict correctly the thermal efficiency of a countercurrent, gas–solid, packed heat exchanger. In the model, the ideal efficiency is multiplied by a ratio of particles in contact with the gas to the total...

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Bibliographic Details
Published in:Journal of heat transfer 1988-05, Vol.110 (2), p.385-389
Main Authors: Saatdjian, E, Large, J. F
Format: Article
Language:English
Subjects:
420400 - Engineering- Heat Transfer & Fluid Flow
ABSORPTION
Applied sciences
Chemical engineering
COLUMN PACKING
CONTROL
DISTILLATION
EFFICIENCY
ENERGY TRANSFER
ENGINEERING
Exact sciences and technology
FLOW MODELS
Heat and mass transfer. Packings, plates
HEAT EXCHANGERS
HEAT TRANSFER
HUMIDITY CONTROL
MASS TRANSFER
MATHEMATICAL MODELS
PACKINGS
PRESSURE DROP
SEPARATION PROCESSES
THERMAL EFFICIENCY
VELOCITY
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Description
Summary:A theoretical model has been used, in conjunction with pressure drop and solid holdup data, to predict correctly the thermal efficiency of a countercurrent, gas–solid, packed heat exchanger. In the model, the ideal efficiency is multiplied by a ratio of particles in contact with the gas to the total amount of particles in the packed section. The Ergun equation is used to obtain both an effective packing porosity and the number of particles in contact with the gas. The results show that the model correctly gives the efficiency versus gas velocity curve for different packing heights and solids mass fluxes. The calculated and experimental velocities for which exchanger efficiency is a maximum are also in agreement.
ISSN:0022-1481
1528-8943
DOI:10.1115/1.3250496