Furnace Radiative Heat Transfer Calculator

Industrial furnace thermal rating: Calculate gas emissivity (\(\epsilon_g\)), radiant exchange factor, tube heat flux, and Lobo-Evans radiant absorbed heat duty.

Furnace Geometry & Firing Conditions

Total Heat Fired Q_f (MW):

Radiant Tube Area A_t (m²):

Flame / Flue Gas Temp T_g (°C):

Outer Tube Wall Temp T_w (°C):

Refractory Area A_r (m²):

Gas Emissivity (ε_g): CO2 + H2O beam

Tube Emissivity (ε_w): Oxidized alloy steel

Radiant Heat Flux & Efficiency

Radiant Absorbed Duty (Q_rad)

Average Tube Heat Flux

Exchange Factor (F)

Refractory Reradiation

Bridgewall Gas Temp

Thermal Firing & Tube Life Assessment

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Furnace Radiative Heat Transfer Calculator

Furnace Geometry & Firing Conditions

Radiant Heat Flux & Efficiency

Frequently Asked Questions