Standard Heat Of Combustion Energy Content

Overview

Engineering reference data for Standard Heat Of Combustion Energy Content 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

Symbol	Description	Unit
$Q$	Heat release rate	W
$\dot{m}$	Mass flow rate	kg/s
$HV$	Heating value	J/kg
$AF$	Air-fuel ratio	—

Standard Heat of Combustion Data

The standard heat of combustion (ΔH°c) represents the energy released when a substance undergoes complete combustion with excess oxygen at standard conditions (25°C and 1 bar). It equals the negative of the enthalpy change for the combustion reaction.

References

• Original Source