Answer:
1.023 * 106 * 5 = 5.115 * 106cfm (K assumed as 5)
Explanation: Q’ = (403 * 106 * SG * ER) / (MW * C)
where Q’ is effective flow rate in cfm,
SG is specific gravity,
ER is emission rate in pints/min,
MW is molecular weight,
C is concentration in ppm.
Actual flow rate Q = Q’ * K where K is the factor for incomplete mixing(1 ≤ K ≤ 10)
For methyl chloride, SG = 1.785, MW = 50.49
Given:- ER = 0.24 cfm = 0.24 * 59.85 pints/min = 14.36 pints/min
C = 200 ppm
Q’ = (403 * 106 * 1.785 * 14.36) / (50.49 * 200) = 1.023 * 106 cfm
Q = 1.023 * 106 * 5 = 5.115 * 106cfm (K assumed as 5)
