Net steam-generation heat calculator

Subtract incoming feedwater enthalpy when measuring useful heat added to steam.

Units

q_{\text{useful}} = m_{\text{steam}} \times \left(h_{\text{steam}} - h_{\text{feed}}\right)

Calculator

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

Given

q_{\text{useful}} = 10{,}000 \times \left(1190 - 180\right) = 10{,}100{,}000

Symbol	Meaning	Unit
$q_{\text{useful}}$	net steam-generation heat rate	Btu/h
$m_{\text{steam}}$	steam mass flow	lb/h
$h_{\text{steam}}$	outgoing steam enthalpy	Btu/lb
$h_{\text{feed}}$	incoming feedwater enthalpy	Btu/lb

Symbol	Meaning	Unit
$q_{\text{useful}}$	net steam-generation heat rate	kW
$m_{\text{steam}}$	steam mass flow	kg/s
$h_{\text{steam}}$	outgoing steam enthalpy	kJ/kg
$h_{\text{feed}}$	incoming 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.