$9$:$54$

$.$

$$ To determine column diameter:

$($a$)$ Gather fluid property data for streams $V,L,V_{,}$&$L_{?}.$

$($b$)$ Determine fluid properties at location where flooding velocity will be calculated $($bottom plate is recommended$).$ Use the Txy diagram to get temperature data for a plate of interest, recognizing that at each plate $($state$)$ in the McCabe$-$Thiele plot, there is an x$,$y coordinate corresponding to an $x-y$ tieline on the Txy diagram. That tie line lies also on the temperature for that plate.

$($c$)$ Determine $L$ and $V$ from the McCabe$-$Thiele diagram by doing a material balance around top or bottom $($bottom is recommended$)$ section of column.

$($d$)$ Determine $F_{LV}$ for use in Fig. $6\mathrm{.}23.$

$($e$)$ Use Fig. $6\mathrm{.}23$ assuming a tray spacing $(24"$ is recommended$)$ to determine the value of $C_F.$

$($f$)$ Use Eqn. $6\mathrm{.}42$ to determine C$.$ You will need to determin values of the factors in this equation to use along with $C_F.$

$($g$)$ Use Eqn. $6\mathrm{.}40$ to determine $U_f$

$($h$)$ Use Eqn. $6\mathrm{.}44$ assuming a fraction of flooding $(0\mathrm{.}8$ is recommended$)$ to determine $D_T.$ You will need to determin the value of $\frac{A_d}{A}.$

q

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