Combustion Values

Overview

Engineering reference data for Combustion Values in combustion engineering.

Key Formulas

Heat Release

$Q = \dot{m} \cdot HV$

Fuel energy release rate.

Air-Fuel Ratio

$AF = \frac{m_{air}}{m_{fuel}}$

Mass of air per mass of fuel.

Excess Air

$EA = \frac{O_2}{21 - O_2} \times 100\%$

From flue gas oxygen measurement.

Variables

Conversion Formulas

The following conversion factors relate different energy density units:

$1 \text{ kJ/kg} = 0.4299 \text{ Btu/lbm} = 0.23884 \text{ kcal/kg}$

$1 \text{ Btu/lbm} = 2.326 \text{ kJ/kg} = 1.8 \text{ kcal/kg}$

Gross Combustion Values

This table lists the gross (higher heating) combustion values for selected materials.

Interactive Charts

References

• Original Source