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Condensation performance in horizontal tubes with second‐law consideration
Author(s) -
Lin W. W.,
Lee D. J.,
Peng X. F.
Publication year - 2001
Publication title -
international journal of energy research
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.808
H-Index - 95
eISSN - 1099-114X
pISSN - 0363-907X
DOI - 10.1002/er.737
Subject(s) - reynolds number , mechanics , thermodynamics , condensation , mathematics , entropy (arrow of time) , physics , geometry , turbulence
This study conducted the second‐law analysis on a saturated FC‐22 vapour flowing through and condensed in horizontal cooling tubes. The optimum Reynolds number exists over the parametric range for the single tube case at which the entropy generates at a minimum rate. For the multi‐tube cases, no optimal Reynolds number is identified under the constant surface‐area constraint. Apparently, there exists an optimal cooling temperature that generates a minimum of entropy for a given duty, which depends strongly upon many process parameters like mass flow rate and tube geometry. Copyright © 2001 John Wiley & Sons, Ltd.