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Atmospheric Dispersion Equation Formulas Calculator
Air Pollution Control - Stacks
Solving for stack diameter for superadiabatic conditions.
Inputs:
Conversions:
| average wind speed (u) | = | 0 | = | 0 | meter/second | |
| stack gas exit speed (Vs) | = | 0 | = | 0 | meter/second | |
| plume rise (Δh) | = | 0 | = | 0 | meter | |
| stack heat emission rate (Qh) | = | 0 | = | 0 | kilojoule/second |
Solution:
| stack diameter (d) | = | HAS NOT BEEN CALCULATED |
Other Units:
Change Equation
Select an equation to solve for a different unknown
Gaussian plume dispersion model developed by Pasquill
wind speed at elevation from known wind speed and elevation
effective stack height
plume rise for superadiabatic conditions
plume rise for neutral stability conditions
plume rise for subadiabatic conditions
Where
Select an equation to solve for a different unknown
Gaussian plume dispersion model developed by Pasquill
 |
plume contaminant concentration at a point in space |
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plume contaminant concentration at ground level |
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contaminant concentration at ground level along the plume centerline |
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contaminant concentration at ground level along the plume centerline when the emission source is at ground level |
wind speed at elevation from known wind speed and elevation
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wind speed at elevation |
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weather station wind speed |
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elevation |
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weather station elevation |
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stability parameter |
effective stack height
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effective stack height |
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physical stack height |
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plume rise |
plume rise for superadiabatic conditions
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plume rise |
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stack gas exit speed |
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stack diameter |
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average wind speed |
 |
stack heat emission rate |
plume rise for neutral stability conditions
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plume rise |
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stack gas exit speed |
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stack diameter |
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average wind speed |
 |
stack heat emission rate |
plume rise for subadiabatic conditions
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plume rise |
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stack gas exit speed |
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stack diameter |
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average wind speed |
 |
stack heat emission rate |
Where
| C | = | downwind concentration |
| Q | = | pollution source emission rate |
| u | = | average wind speed |
| σy | = | y direction plume standard deviation |
| σz | = | z direction plume standard deviation |
| x | = | position in the x direction or downwind direction |
| y | = | position in the y direction |
| z | = | position in the z direction |
| H | = | effective stack height |
References - Books:
1) P. Aarne Vesilind, J. Jeffrey Peirce and Ruth F. Weiner. 1994. Environmental Engineering. Butterworth Heinemann. 3rd ed.
AJ Design - Online Science Mathematics Engineering Software Programs | 2 | 3 | 4 | 5
by Jimmy Raymond
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