Page 12 - Advanced thermodynamics for engineers

Notation

Activity coefficient
a
Specific non-flow availability
a
Coefficient in van der Waals equation
a
Specific flow availability
a f
Enthalpy coefficient for gas properties
a i
Non-flow availability
A
Area
A
A Tafel constant
AFC Alkaline fuel cell
Specific exergy
b
Coefficient in van der Waals equation
b
Bypass ratio
b
Exergy
B
Specific heat capacity at constant pressure (sometimes abbreviated to specific heat at constant
c p
pressure)
Mean value of specific heat capacity at constant pressure over a range of temperatures
~ c p
Molar specific heat capacity at constant pressure (i.e. specific heat capacity at constant pressure based
c p
on mols)
Specific heat capacity at constant volume (sometimes abbreviated to specific heat at constant
c v
volume)
Molar specific heat capacity at constant volume (i.e. specific heat capacity at constant volume based
c v
on mols)
Conductivity for heat flow into engines
C
CN Cetane number
d Increment in – usually used for definite integral, e.g. property, etc.
Mass diffusivity
D
DMFC Direct methanol fuel cell
Specific internal energy
e
egr Exhaust gas recirculation
Internal energy
E
Activation energy
E
Electromotive force of a cell (emf)
E
0
E Standard emf of a cell
Open circuit voltage
E oc
Specific Helmholtz energy (Helmholtz function)
f
Flame speed factor
f f
Helmholtz energy (Helmholtz function)
F
Force
F
Thrust of gas turbine
F
Specific thrust of gas turbine
F s
Faraday constant (charge carried by kmol of unit positive valency [96,487 kC/kmol])
F
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