Given the excess air fraction and fuel composition, this algorithm calculates the expected O2 percentage in the flue gas using stoichiometric and mass balance relationships.

O2 Percentage

The O2 content is calculated from the mass of excess oxygen divided by the total flue gas mass, converted to volumetric percentage.

Symbols

\(O_2\)	Flue gas oxygen percentage \([\unit{ \percent}]\)
\(EA\)	Excess air fraction \([\unit{ \unitless}]\)