Question

On a clear winter night, a wind speed of 2.5 m/s was measured on a 10-m pole. The centerline ground-level concentration of SO2 was found to be 198 μg/m3 at a point 2.8 km downwind from a coal-fired power plant. The effective stack of the power plant is 85 m.

a.Determine the atmospheric stability category of the day.

b. Estimate the windspeed at 85 m (in m/s).

c. Determine the SO2 emission rate (kg/s) of the power plant in kg/s by using the Table 7.8 on pg. 457.

Answer #1

On an afternoon with moderate incoming solar radiation and an
average wind speed of 2.5 m/s at a height of 10 m above the ground
surface, a power plant emits sulfur dioxide at a rate of 1 kg/s.
The effective height of stack is 130 m. The wind speed at the
effective stack height is 2.8 m/s. Calculate the concentration (in
μg/m3) of sulfur dioxide at ground elevation, directly 3
km downwind from the stack (show hand calculation for this...

A coal fired plant burns 1000 metric tons of coal per day at 2%
sulfur. ( 1 metric ton = 1000 kg).
What is the SO2 emission rate?
What is the SO2 concentration 1.0 km downwind(x =
1000m)?
0.1 km off centerline in y direction (y = 100m)? and
At ground level (z = 0) wind speed is 4 m/s and it’s a cloudy
day?
At ground level (z = 0) wind speed is 4 m/s and it’s a cloudy...

It is 1pm on a sunny
fall afternoon with a temperature of 10°C, atmospheric pressure of
102.1 kPA, and a wind velocity of 5.3 m/s. A coal fired power plant
with a 3.1 m diameter, 53 m tall stack emits flue gas at a velocity
of 20 m/s and a temperature of 305°C.
Calculate the
effective stack height.
Select one:
a. 121 m
b. 68.2 m
c. None of the other answers are correct.
d. 167 m
e. 167 m

True/False?Justify your answer
If wind speed in a rural setting is 4m/s at 10 m from ground
levelon a brightand clearsunny day, it will exceed12 m/s at
thelocation of emission of pollutants from a 100-m tall stack

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