Fired Heater & Furnace Calculator
Calculate heat duty, thermal efficiency, fuel consumption, and flue gas properties
Process Conditions
Typical: 10-20%
Furnace Performance
Heat Duty
1389
kW
Thermal Efficiency
79.2%
LHV basis
Fuel & Combustion
Fuel Consumption:131.6 Nm³/h
Heat Input:1754 kW
Air/Fuel Ratio:17.3
Flue Gas Temp:230 °C
Heat Distribution
Radiant Section:903 kW (65%)
Convection Section:486 kW (35%)
Heat Balance
Absorbed by Process:79.2%
Stack Loss:52.8%
Radiation Loss:34.3%
Other Losses:12.9%
Optimization Tips
- ✓ Excess air in optimal range
Heat Balance Diagram
Fuel Energy
1754 kW
100%
Process Heat
79.2%
Stack Loss
52.8%
Radiation
34.3%
Other
12.9%
Learn More
Understand the principles of fired heater design, radiant heat transfer, Stefan-Boltzmann law, and thermal efficiency optimization.
View Theory & Examples