Skip to Content

What power is needed for 1 tonne of steam per hour

A tonne of saturated steam per hour at 8 bar and 80 °C water is about 680 kW of useful power, and about 740 kW on fuel at 92 % efficiency.

Parameters

Result

Approximate calculation using a simplified model: for designing equipment and process modes, consult a technologist.

Calculation example

What is known
Required amount of steam, kg/h
Steam required
1 000 kg/h
Steam pressure (gauge), bar
8
Feed water temperature
80 °C
Boiler efficiency on fuel
92 %
Steam
1 000 kg/h
Useful thermal power
677 kW
Fuel power
736 kW
Natural gas (approx.)
78,0 m³/h
Saturated steam temperature
175 °C
Feed water including blowdown
1,05 m³/h
Steam per 1 kW of power
1,48 kg/h

Frequently asked questions

Why is the fuel power greater than the useful power?
Part of the heat is lost with flue gases and through the walls: the efficiency of a modern steam boiler is 88–95 %.

The calculations are approximate: they help to assess the process and compare options, but do not replace a process design and trials on a specific raw material. This section is for reference only and contains no commercial offers.