Hot Water Flow Formula

The hot water flow rate is calculated by dividing the recovered heat by the product of temperature difference and water density. Water density is physics::us::kWaterDensity (8.335 lb/gal).

\begin{equation}\label{eq:water-heating-exhaust-hot-water-flow} \dot{m}_{water} = \frac{Q_{rec}}{\Delta T \cdot \rho_{water}}\end{equation}

Symbols

\(\dot{m}_{water}\)	Hot water flow rate \([\unit{ \gallon\per\hour}]\)
\(Q_{rec}\)	Recovered heat \([\unit{ \btu\per\hour}]\)
\(\Delta T\)	Temperature difference (chiller inlet - chiller outlet) \([\unit{ \degreeFahrenheit}]\)
\(\rho_{water}\)	Water density - see physics::us::kWaterDensity \([\unit{ \pound\per\gallon}]\)