Page 194 - Modelling in Transport Phenomena A Conceptual Approach

174 CHAPTER 6. STEADY-STATE MACROSCOPIC BALANCES

NOTATION

A area, m2
AH heat transfer area, m2
AM mass transfer area, m2
CP heat capacity at constant pressure, kJ/ kg. K
C concentration, kmol/ m3
DAB diffusion coefficient for system d-B, m2/ s
E total energy, J
EK kinetic energy, J
EP potential energy, J
E rate of energy, J/s
& activation energy, J/ mol
9 acceleration of gravity, m/ s2
H enthalpy, J
h elevation, m
k reaction rate constant
kc mass transfer coefficient, m/s
m mass flow rate, kg/s
M molecular weight, kg/ kmol
n molar flow rate, kmol/ s
P pressure, Pa
Q heat transfer rate, W
Q volumetric flow rate, m3/ s
r rate of a chemical reaction, kmol/ m3. s
R gas constant, J/ mol. K
T temperature, "C or K
t time, s
U internal energy, J
V volume, m3
V velocity, m/ s
w rate of work, W

ws rate of shaft work, W
X fractional conversion
xi mole fraction of species i

ai stoichiometric coefficient of species i
aij stoichiometric coefficient of ith species in the jth reaction
P coefficient of volume expansion, Q. (6.3-13), K-'
A difference
AHf heat of formation, J/ mol
AHmn heat of reaction, J
x latent heat of vaporization, J
CL viscosity, kg/ m. s