Standard Heat Of Combustion Energy Content

Reference data and engineering information about standard heat of combustion energy content for combustion applications.

standardheatcombustionenergyCalculator

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

Source: engineeringtoolbox.com