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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 |