determine the plume rise from a 35m high stack .1 Determine the plume rise from

Question

determine the plume rise from a 35m high stack .1 Determine the plume rise from a 35 m high stack if the buoyancy flux from the source is 52 m/s3 and the wind velocity is 4.5 m/s. The atmospheric condition is slightly unstable. State any assumptions made With reference to the variables in the Gaussian model for determination of maximum ground level pollutant concentration, give 3 ways of minimizing the environmental impacts from stack emissions How is maximum mixing depth (MMD) determined? Explain the significance of maximum mixing depth in air pollution control. 2

Explanation / Answer

Ans 1

Buoyancy flux F = 52 m4/s3

For F <= 55 m4/s3

X* = 14 F^(5/8)

= 14*(52^5/8)

= 165.436

Plume rise = stack height + [1.6*F^1/3 * (3.5X*)^(2/3)]/Us

= 35 + [1.6*52^1/3 * (3.5*165.436*)^(2/3)]/4.5

= 35 + (5.972 x 69.470)/4.5

= 35 + 92.1947

= 127.19 m

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