Boiler ID Fan Capacity Calculator
Atmospheric / Reference Temperature: 30 °C
Theoretical Air Requirement: kg air/kg fuel
Excess Air: %
Actual Air Requirement: kg air/kg fuel
Dry Flue Gas: kg/kg fuel
Water Vapour: kg/kg fuel
Total Wet Flue Gas: kg/kg fuel
Flue Gas Volume at Reference Condition: Nm³/hr
Flue Gas Volume at Actual Flue Gas Temperature: m³/hr
Flue Gas Flow: m³/sec
Total Required ID Fan Capacity: m³/sec
Total Required ID Fan Capacity: m³/hr
ID Fan-1 Capacity: m³/sec
ID Fan-1 Capacity: m³/hr
ID Fan-2 Capacity: m³/sec
ID Fan-2 Capacity: m³/hr
• Atmospheric/reference temperature = 30°C.
• Atmospheric pressure = 1.01325 bar.
• Two ID fans are assumed.
• Both ID fans share the total flow equally.
• Flue-gas volume is corrected for actual flue-gas temperature.
• Design margin is added to the total required fan capacity.
• Final fan selection should consider ID fan static pressure, furnace pressure, ESP/bag filter DP, duct losses, chimney resistance, leakage air and fan efficiency.