The total heat delivered is the sum of chemical energy from combustion and electrical energy supplied to the furnace.

\begin{equation}\label{eq:eaf-heat-delivered} Q_\text{delivered} = Q_\text{chem} + Q_\text{elec}\end{equation}

Symbols

\(Q_\text{delivered}\)	Total heat delivered to EAF \([\unit{ \btu\per\hour}]\)
\(Q_\text{chem}\)	Total chemical energy input \([\unit{ \btu\per\hour}]\)
\(Q_\text{elec}\)	Electric power supplied \([\unit{ \btu\per\hour}]\)