Abstract
This article deals with experimental research of the direct-contact condensation in column with structured packing. Lots of experiments have been performed in a column of 257 mm inner diameter with Topic 125 Y structured packing using hydrocarbon mixtures. The influences of the vapor and liquid flow rate as well as liquid temperature at vacuum pressure have been investigated. A new empirical correlation was developed to predict the heat transfer coefficient for structured packings, which can be applied to both design and simulation of distillation columns in petroleum refinery.
NOMENCLATURE
Cp, L | = | specific heat of liquid, kJ/kgK |
Hv | = | latent heat of vaporization, kJ/kg |
Q | = | heat flux between vapor and liquid, kJ/sec |
G | = | liquid spraying density, kg/m2sec |
L | = | vapor spraying density, kg/m2sec |
mL | = | liquid mass flow rate, kg/sec |
mv, i | = | vapor mass flow rate, kg/sec |
mV, out | = | outlet vapor mass flow rate, kg/sec |
tL, i | = | liquid temperature at the bottom of the ith packing, K |
tL, out | = | outlet liquid temperature, K |
UV | = | local volumetric heat transfer coefficient, kW/m3 |
Subscripts
In | = | inlet |
L | = | liquid |
Out | = | outlet |
i | = | the ith layer of packings |
V | = | vapor |