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Mathematical development of tube loading in horizontal condensers
Author(s) -
Kern Donald Q.
Publication year - 1958
Publication title -
aiche journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.958
H-Index - 167
eISSN - 1547-5905
pISSN - 0001-1541
DOI - 10.1002/aic.690040208
Subject(s) - nusselt number , tube (container) , turbulence , mechanics , condensation , mathematics , bounded function , horizontal and vertical , thermodynamics , physics , engineering , geometry , mathematical analysis , mechanical engineering , reynolds number
Equations were derived by Nusselt for condensation on a vertical bank of horizontal tubes employing several questionable assumptions. His theoretical results indicate that the average condensing coefficient for a tube in an n ‐tube vertical bank should be n −1/4 times the single‐tube coefficient. An empirical modification for turbulence previously suggested by the present author changed the factor to n −1/6 . To facilitate further experimental studies and design calculations, precise equations are developed for condensate loading for the different common tube layouts bounded by a circle. These equations use a generalized factor n −1/s where a value of s/4 > 1.0 becomes an index of turbulence.