Nomenclature of Thermodynamics

NOMENCLATURE :

Symbols	Name	Unit
A	Availability or Energy	KJ
b	Specific Keenan Function	KJ/Kg
c	Velocity of Sound	m/s
Cp	Specific Heat at constant pressure	KJ/Kg K
Cv	Specific Heat at constant volume	KJ/Kg K
COP	Coefficient of Performance	No Unit
D, d	Diameter	Many Units Exist
e	Specific Energy	KJ/Kg
E	Total Energy	KJ
f	Fugacity, Specific Helmholtz Function, u-Ts	KJ/Kg
F	Force	N
F	Helmholtz Function	KJ
g	Gravitational acceleration	m/s2
g	Specific Gibbs Function	KJ/Kg
h	Specific Enthalpy	KJ/Kg
hf	Enthalpy of formation	KJ/Kg mol
HP	Enthalpy of Products	KJ
HR	Enthalpy of Reactants	KJ
hRP	Enthalpy of Combination	KJ/Kg fuel
HHV	Higher heating value	KJ/Kg fuel
i	Specific irreversibility	KJ/Kg
I	Total irreversibility	KJ
K	Boltzmann constant	J/molecule-K
K	Indicator spring constant	N/cm3
k	Thermal conductivity	W/mK
kT	Isothermal compressibility	K-1
kS	Adiabatic compressibility	m2 / N
K	Equilibrium constant
KE	Total kinetic energy	KJ
l	Latent Heat	KJ/Kg
L	Length	m
LHV m	Lower Heating Value Mass	KJ/Kg Kg
ṁ	Mass flow rate	Kg/s
M	Mach Number
M	Molar mass	Kg/Kg mol
mep	Mean effective pressure	N/m2
MF	Mass fraction
n	Polytropic index, Number of moles
N	Number of molecules
p	Pressure	N/m2  (Pa)
p	Partial Pressure	Pa
Pc, Pcr	Critical Pressure	kPa
Po	Atmosoheric Pressure	kPa
Pv	Vapour Pressure	kPa
PE	Total Potential Energy	KJ
Q	Total Heat Transfer	KJ
Q	Heat transfer rate	KJ/s
rC	Cut-off ratio
re	Expansion ratio
Yk	Compression ratio
Yp	Constant volume pressure ratio
R	Characteristics of gas constant	KJ/Kg-K
R,Ru	Universal gas constant	KJ/Kg mol-K
s	Specific entropy	KJ/Kg-K
S	Total entropy	KJ/K
t	Time, Temperature	s, 0C
T	Temperature	K
Tas	Adiabatic saturating temperature	K
Tcr	Critical temperature	K
Tdb	Dry bulb temperature	K,0C
Tdp	Dew point temperature	0C
T0	Temperature of surroundings	K
u	Specific internal energy	KJ/Kg
U	Total internal energy	KJ
v	Specific volume	m3/Kg
vc, vcr	Critical specific volume	m3/Kg
V	Total volume	m3
W	Total Work	KJ
W	Power	KW
Wmax	Maximum Work	KJ
Wrev	Reversible Work	KJ
Wu	Useful Work	KJ
x	Quality, Dryness Fraction
x	Mass fraction, Mole fraction
z	Elevation	m
Z	Compressibility factor