Page 161 - Chemical process engineering design and economics

144 Chapter 3

water or wet-bulb temperature
t w
T absolute temperature

U overall heat-transfer coefficient

v specific volume or velocity

V variable or vessel volume

W work done

x conversion
y mole or mass fraction

z elevation

Greek

E roughness

p molar density
Subscripts

B at the bubble-point temperature

D at the dew-point temperature

i ith component

L liquid phase
LM logarithmic mean

p process or constant pressure

P property

R reference

S saturated vapor or liquid

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