ISSN Online: 2377-424X
ISBN Print: 0-89116-299-2
International Heat Transfer Conference 7
PRESSURE DROP FOR CONDENSATION OF A PURE VAPOUR IN DOWN FLOW IN A VERTICAL TUBE
Resumo
Experimental data for the pressure drop of a
pure condensing vapour in a vertical tube are
compared with the predictions of an annular flow
model. The comparisons are made using data
obtained by the authors and using further data
obtained from other sources. The data span a
mass flux range from 0 to 1000 kg/m2s and a tube
diameter range from 7.5 to 25.4 mm. The experimental
data are for the condensation of steam,
methanol, refrigerant 113, refrigerant 11,
refrigerant 21 and refrigerant 114. It is found
that the predictions of the annular flow model
are sensitive to the form of the interfacial
roughness correlation employed in the model. Of
two interfacial roughness correlations tested,
neither was able to predict accurately all the
data.