Required steam mass flow calculator

Required steam mass flow is calculated as q_required / (h_steam − h_feed). Use the stated system boundary and matching input units.

Units

m_{\text{steam}} = \frac{q_{\text{required}}}{h_{\text{steam}} - h_{\text{feed}}}

Calculator

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

Given

m_{\text{steam}} = \frac{100}{50 - 33.33333333} = 6

Symbol	Meaning	Unit
$m_{\text{steam}}$	required steam mass flow	lb/h
$q_{\text{required}}$	useful steam heat requirement	Btu/h
$h_{\text{steam}}$	steam enthalpy	Btu/lb
$h_{\text{feed}}$	feedwater enthalpy	Btu/lb

Symbol	Meaning	Unit
$m_{\text{steam}}$	required steam mass flow	kg/s
$q_{\text{required}}$	useful steam heat requirement	kW
$h_{\text{steam}}$	steam enthalpy	kJ/kg
$h_{\text{feed}}$	feedwater enthalpy	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.