Irreversibility analysis of a sieve tray in a distillation column

A Second Law analysis has been developed for a vapor-liquid contacting device as in the sieve tray of a distillation column. Using a discrete bubble dynamics model, an equation for entropy balance has been formulated to numerically evaluate the entropy generation rate associated with heat, mass and...

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Bibliographic Details
Published inInternational journal of heat and mass transfer Vol. 39; no. 7; pp. 1535 - 1542
Main Authors Ray, S., Sengupta, S.P.
Format Journal Article
LanguageEnglish
Published Oxford Elsevier Ltd 1996
Elsevier
Subjects
Applied sciences
Chemical engineering
Distillation
Exact sciences and technology
Distillation
Plate column
Perforated tray
Theoretical study
Irreversible process
Numerical simulation
Second law of thermodynamics
Entropy
Dynamic model
Thermodynamic properties
Modeling
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Summary:A Second Law analysis has been developed for a vapor-liquid contacting device as in the sieve tray of a distillation column. Using a discrete bubble dynamics model, an equation for entropy balance has been formulated to numerically evaluate the entropy generation rate associated with heat, mass and momentum transfer for bubble movement through a moving liquid pool. The entropy generation rates per unit bubble mass have been evaluated for variations in sieve tray parameters like orifice diameter and weir height for fixed separation characteristics of components constituting the two phases. It has been found that among the tray parameters, weir height plays a dominant role compared to sieve hole diameter on entropy generation.
ISSN:0017-9310
1879-2189
DOI:10.1016/0017-9310(95)00231-6