The equivalent fuel-fired heat input is calculated as:

\begin{equation}\label{eq:energy-equivalency-fuel-fired} P_{fuel} = \frac{P_{elec} \cdot \eta_{elec}}{\eta_{fuel}}\end{equation}

Symbols

\(P_{fuel}\)	Equivalent fuel-fired heat input \([\unit{ \mega\btu\per\hour}]\)
\(P_{elec}\)	Electrical heat input \([\unit{ \kilo\watt}]\)
\(\eta_{elec}\)	Electrically heated furnace efficiency \([\unit{ \percent}]\)
\(\eta_{fuel}\)	Fuel-fired furnace efficiency \([\unit{ \percent}]\)

Note

The result is converted from kW to MMBtu/hr using the factor 1 kW = 0.003412142 MMBtu/hr.