Burner Combustion Air Preheat Savings Calculator

Burner Combustion Air Preheat Savings Calculator

Recuperative and regenerative burners recover waste heat to preheat incoming combustion air - reducing how much fuel has to supply the same total temperature rise from ambient to flame temperature.

The Formula

Savings % = (T_preheat - T_ambient) / (T_flame - T_ambient) × 100

Worked Example

Air preheated to 300°C, ambient at 20°C, adiabatic flame temperature 1,900°C:

Savings = (300-20)/(1900-20) × 100 ≈ 14.9%

How to Use This Calculator

1. Enter the preheated combustion air temperature.
2. Enter ambient (unheated) air temperature.
3. Enter the fuel's adiabatic flame temperature.

This is a simplified first-pass estimate - real savings also depend on furnace-specific heat transfer and excess air levels.