Duct System Friction Losses: Utilizing round duct and the equal friction method, size the supply ductwork and find the external pressure drop $("$WC$)($galvanized duct of average construction$)$ shown below. Air is at standard conditions. The supply diffuser pressure drop is $0\mathrm{.}06"$W$.$C$.(14$ points$)$

SUPPLY

DIFFUSEI

$($TYP$)-$

Use the following $($from CANVAS$)$ to calculate the fitting loss coefficients:

$3-1$ Elbow, Smooth Radius $($Die Stamped$),$ Round $($Locklin $1950,$ Equation A$-10)$

$4-1$ Transition, Round $($Idelchik et al$.1986,$ Diagrams $5-2$ and $5-22)$

$\frac{r}{D}=1\mathrm{.}5$

$5-23$ Wye, Diverging, Rectangular and Round $($Idelchik et al$.1986,$ Diagrams $7-15$ and $7-17)$