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Heat transfer studies in a climbing film evaporator Part II: Heat transfer regions
Author(s) -
Gupta A. S.,
Holland F. A.
Publication year - 1966
Publication title -
the canadian journal of chemical engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.404
H-Index - 67
eISSN - 1939-019X
pISSN - 0008-4034
DOI - 10.1002/cjce.5450440605
Subject(s) - evaporator , heat transfer , materials science , tube (container) , climbing , mechanics , thermodynamics , heat transfer coefficient , composite material , heat exchanger , physics , engineering , structural engineering
There are three sections in an evaporator tube; liquid heating, foam and climbing film. A technique is presented for estimating the lengths of these three sections and the overall heat transfer coefficients in each of them. The lower the liquid feed temperature, the longer the liquid heating length. The length of the foam section does not depend on the liquid feed temperature. In these studies it was estimated to be more than half the length of the evaporator tube. Only at the higher liquid feed temperatures was a climbing film found to exist.