The fuel consumption with oxygen enrichment is calculated by adjusting the baseline fuel consumption based on the ratio of standard available heat to the available heat with enrichment. As the available heat increases with enrichment, less fuel is required to deliver the same process heat.

\begin{equation}\label{eq:o2-enrichment-fuel-consumption} FC_{enriched} = FC_{base} \cdot \frac{AH_{std}}{AH_{enriched}}\end{equation}

Symbols

\(FC_{enriched}\)	Fuel consumption with O2 enrichment \([\unit{ \mega\btu\per\hour}]\)
\(FC_{base}\)	Baseline fuel consumption \([\unit{ \mega\btu\per\hour}]\)
\(AH_{std}\)	Standard available heat (baseline) \([\unit{ \percent}]\)
\(AH_{enriched}\)	Available heat with O2 enrichment \([\unit{ \percent}]\)