A $4$

B$4$

C$5$

D$2$

Please use the numbers in your student ID associated with the letters above in your calculations.

$4.$ A coal gas power plant on a rural area is working with $3D\%$ efficiency with power capacity of $3CO$ MW$.$ The actual stack height of the plant is $50m$ and the effective stack height is $100m.$ The $S{O}_2$ emissions are given as D$.80g$ per $kg$ of coal and calorific value of the coal is $8000$kca$\frac{l}{k}g.$ On a sunny day, with the wind speed of $A\frac{m}{s}($fake $4\frac{m}{s}$ if your $A$ is $0)$ at $10m,$ calculate the following: $(30$ points$)$

a$.$ maximum $S{O}_2$ concentration and ifs location.

$$

b$.$ ground level $S{O}_2$ concentration $3km$ downwind from the stack.

c$.$ How the two concentralions in parts $a.$ and $b.$ change in cloudless night time if the wind speed is the same as initial condifions. $(1ca\frac{l}{s}=4\mathrm{.}184W)$

$\backslash$table$[[\backslash$table$[[$Stability$],[$Categories$]],$P value$],[$A$,0\mathrm{.}07,$Urban$],[$B$,0\mathrm{.}07,0\mathrm{.}15],[$C$,0\mathrm{.}10,0\mathrm{.}15],[$D$,0\mathrm{.}15,0\mathrm{.}20],[$E$,0\mathrm{.}35,0\mathrm{.}30],[$F$,0\mathrm{.}55,0\mathrm{.}30]]$