Condensation of mixtures in shell-and-tube condensers – the influence of important factors on calculation results
Paper i proceeding, 2002
Calculations are carried out for condensation of
zeotropic refrigerant mixtures in a horizontal shell-andtube
condenser, in order to investigate possible causes
for overpredictions of heat transfer found when
comparing with experimental data. A rigorous
calculation method is compared to an earlier used
simplified method, and to experimental measurements,
but the rigorous method turns out to predict even better
heat transfer. Mass transfer in the gas phase is calculated
to reduce heat transfer up to 10%, but this effect cannot
alone explain the overprediction of heat transfer.
However, investigations show that the degree of mixing
in the condensate layer is of great importance, and can
be one important reason for the overprediction.
Geometry data turned out to have only minor effects on calculation results.