Second-law analysis of vapor condensation of FC-22 in film flows within horizontal tubes
Journal
Journal of the Chinese Institute of Chemical Engineers
Journal Volume
32
Journal Issue
1
Pages
89-94
Date Issued
2001
Author(s)
Abstract
This study performed second-law analysis on saturated FC - 22 vapor flowing through and condensed in horizontal cooling tubes. An optimum Reynolds number existed over the parametric range investigated for the single tube case at which the entropy generated at a minimum rate. For the multi-tube cases, on the other hand, no optimal Reynolds number was identified subject to constant surface-area constraint. Furthermore, there was an optimal cooling temperature that generated a minimum of entropy for a given duty. The present phase-change system was inherently different in thermodynamic performance from the single-phase convective system intensively discussed in literature works.
Subjects
Cooling tempearature
Film condensation
Optimal Reynolds number
Second-law
Type
journal article