Page 379 - Chemical process engineering design and economics

358 Chapter 6

T temperature

v velocity

terminal velocity of a dispersed phase drop
v d
superficial velocity
v s
vapor velocity
v v
V volume

volumetric flow rate of bottom-product
V B
volumetric flow rate of the dispersed phase
V D
volumetric flow rate of the liquid, or light phase
V L
volumetric flow rate of vapor
V v
x mole fraction in the liquid phase or distance

XLK mole fraction of the light key component in the liquid

XHK mole fraction of the heavy key component liquid

y mole faction in the gas or vapor phase

Z column height

ZT tray spacing

Greek

a relative volatility, or specific resistance

a
( Oavg geometric mean
E weld efficiency, fraction absorbed or stripped, void fraction (porosity)

head weld efficiency
e H
8s shell weld efficiency

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