The heat loss is calculated by multiplying the water flow rate, water density, temperature rise, and correction factor. Water density is temperature-dependent and calculated using the Tanaka correlation. The factor of 60 converts from gallons per minute to gallons per hour.

\begin{equation}\label{eq:water-cooling-heat-loss} Q_\text{cool} = FR \cdot 60 \cdot \rho_{w,lb/gal} \cdot \Delta T \cdot CF\end{equation}

Symbols

\(Q_\text{cool}\)	Water cooling heat loss \([\unit{ \btu\per\hour}]\)
\(FR\)	Water flow rate \([\unit{ \gallon\per\minute}]\)
\(60\)	Minutes per hour (GPM to GPH conversion) - see physics::conversions::kMinutesPerHour \([\unit{ \unitless}]\)
\(\rho_{w,lb/gal}\)	Water density \([\unit{ \pound\per\gallon}]\)
\(\Delta T\)	Temperature rise (outlet - inlet) \([\unit{ \degreeFahrenheit}]\)
\(CF\)	Correction factor \([\unit{ \unitless}]\)