Symbols and Abbreviations
A
Area, m
2
A H
Helmholtz function, U À TS, kJ
AF
Air–fuel ratio
c
Speed of sound, m/s
c p
Constant pressure specific heat, kJ/kg-K
c p
Constant pressure molar specific heat, kJ/kmol-K
c v
Constant volume specific heat, kJ/kg-K
c v
Constant volume molar specific heat, kJ/kmol-K
C p
Constant pressure heat capacity, kJ/K
C v
Constant volume heat capacity, kJ/K
e
Specific total energy, kJ/kg
e
Molar specific total energy, kJ/kmol
E
Total energy, E = U + KE + PE, kJ
Ex
Exergy, kJ
Ex
MTL
Material exergy
ex
Mass specific exergy, kJ/kg
EGP
Entropy growth potential, kJ/K
F
Force, kN
FA
Fuel–air ratio
fe
Flow specific exergy, defined by (120)
g
Specific Gibbs function, kJ/kg
G
Gibbs function, G = H ÀTS, kJ
h
Specific enthalpy, kJ/kg
H
Enthalpy, H = U + pV, kJ
h f
Enthalpy of formation, kJ/kmol
h
0
f
Enthalpy of formation at 25 °C and 1 atm
HHV
Higher heating value, kJ/kg fuel
J
Joule’s constant (the MEH constant), joule/calorie 15
J Q
Heat flow
J S
Entropy flow
k
Specific heat ratio, c p =c v
K p
Equilibrium constant
KE
Kinetic energy,
1
2 mV
2 , kJ
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