$(5\mathrm{.}3)$ An ESP must treat $500,000$ acfm with $99\%$ efficiency. Assuming an effective drift velocity

of $0\mathrm{.}4f\frac{t}{sec},$ calculate the required plate area in $f{t}^2,$ and the number of plates if each is

$20$ ft tall by $10$ ft long, and there are $4$ mechanical fields.

GIVENS:

$$:$=0\mathrm{.}99,Q$:$=500000\frac{f^3}{\text{m}\text{i}\text{n}},w$:$=0\mathrm{.}4\frac{ft}{(s)}$

$H$:$=20*ft,L_p$:$=10*ft,N_s$:$=4,*$sections in the direction of flow

are called mechanical fields