Boiler Efficiency Calculator

Calculate boiler efficiency by direct and indirect methods, including stack losses and fuel consumption.

Mass flow of steam produced.
kg/h
Enthalpy of output steam. Sat@10bar: 2778 kJ/kg.
kJ/kg
Enthalpy of feedwater. 80°C: 335 kJ/kg.
kJ/kg
Mass flow of fuel burned.
kg/h
Lower heating value. Natural gas: 50000, Coal: 25000, Oil: 42000 kJ/kg.
kJ/kg

Results

Heat to Steam-MW
Heat Input (Fuel)-MW
Boiler Efficiency-%
Steam-to-Fuel Ratio-
References: ASME PTC 4 — Fired Steam Generators; BS 845