Saturated wet-steam quality calculator

For an equilibrium saturated liquid-vapor mixture, h = h_f + x_fraction × h_fg; quality measures vapor mass fraction, not vapor volume.

Units

x = \frac{100 \times \left(h - h_{f}\right)}{h_{\text{fg}}}

Calculator

Enter the values you know and leave one box empty. Calculate finds the empty one, the result or any input.

Given

x = \frac{100 \times \left(980 - 260\right)}{900} = 80

Symbol	Meaning	Unit
$x$	steam mass quality	%
$h$	wet-stream specific enthalpy	Btu/lb
$h_{f}$	saturated liquid enthalpy at the same pressure	Btu/lb
$h_{\text{fg}}$	latent heat at the same pressure	Btu/lb

Symbol	Meaning	Unit
$x$	steam mass quality	%
$h$	wet-stream specific enthalpy	kJ/kg
$h_{f}$	saturated liquid enthalpy at the same pressure	kJ/kg
$h_{\text{fg}}$	latent heat at the same pressure	kJ/kg

Results are estimates for study and screening. Check the inputs, units and assumptions before you use them for design, billing or contract decisions.