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Nomenclature

Symbol Physical Meaning Common SI Units
A Area m2
Cp Constant-pressure specific heat J/kg-K      or     kJ/kg-K
Cv Constant-volume specific heat J/kg-K      or     kJ/kg-K
e Total stored specific energy J/kg       or      kJ/kg
E Total stored energy J       or      kJ
F Force N       or      kN
g Gravitational acceleration m/s2
h Specific enthalpy J/kg        or      kJ/kg
H Enthalpy J        or      kJ
k Heat capacity ratio –
K Spring constant N/m          or      kN/m
KE Kinetic energy J          or      kJ
m Mass kg
PE Potential energy J         or      kJ
P Pressure Pa         or      kPa
Q Heat J         or      kJ
R Gas constant J/kg-K        or     kJ/kg-K
s Specific entropy J/kg-K        or     kJ/kg-K
S Entropy J/kg         or      kJ/kg
t Time s
T Temperature Kelvin  (K)
u Specific internal energy J/kg          or      kJ/kg
U Internal energy J          or      kJ
v Specific volume m3/kg
V Volume m3
V Velocity m/s
W Work W          or       kW
x Quality of saturated liquid-vapor two-phase mixture –
z Height m
Z Compressibility factor –

 

 

 

Greek Symbols

Symbol Physical Meaning Common SI Units
ρ Density kg/m3
η Efficiency –

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Introduction to Engineering Thermodynamics Copyright © 2022 by Claire Yu Yan is licensed under a Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International License, except where otherwise noted.

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