Page 37 - DJJ20063- Thermodynamics 1

DJJ20063- Thermodynamics 1

REMEMBER!
These equations are used very often
and are, therefore, important to

remember!
v = xvg

h = hf + xhfg
u = uf + x(ug – uf )
s = sf + xsfg

Symbols Units Description

p bar Absolute pressure of the fluid

o
ts C Saturation temperature corresponding to the pressure p bar
3
vf m /kg Specific volume of saturated liquid
3
vg m /kg Specific volume of saturated steam
uf kJ/kg Specific internal energy of saturated liquid
ug kJ/kg Specific internal energy of saturated steam

hf kJ/kg Specific enthalpy of saturated liquid

hg kJ/kg Specific enthalpy of saturated steam
hfg kJ/kg Change of specific enthalpy during evaporation

sf kJ/kg K Specific entropy of saturated liquid
sg kJ/kg K Specific entropy of saturated steam

sfg kJ/kg K Change of specific entropy during evaporation

28 | P a g e