$-$ An ESP is treating $150,000$ ft$3/$min of air with an effective drift velocity of $20$ ft$/$min$.$

Calculate the total plate area $($in ft$2)$ required to achieve $95\%$ efficiency in an ESP by using the mixed$-$flow equation.

Assuming the plates are $20-$ft high and $10-$ft long, and that there will be $3$ sections in the direction of flow, calculate the number of plates required.

$\backslash$eta $=1-$exp$(-($w A$)/$Q$)$ N $=$ A$/($Ap x Ns$)+1$