Air Pollution Control Stacks Equation Formulas

pollution rate emission rate(Q)

= 0

= 0

gram/second

average wind speed (u)

= 0

= 0

meter/second

y direction plume standard deviation (σ_{y})

= 0

= 0

meter

z direction plume standard deviation (σ_{z})

= 0

= 0

meter

contaminant concentration at ground level

along the plume centerline when the

emission source is at ground level (C)

along the plume centerline when the

emission source is at ground level (C)

= NOT CALCULATED

Select to solve for a different unknown

Gaussian plume dispersion model developed by Pasquill

wind speed at elevation from known wind speed and elevation

wind speed at elevation | |

weather station wind speed | |

elevation | |

weather station elevation | |

stability parameter |

effective stack height

effective stack height | |

physical stack height | |

plume rise |

plume rise for superadiabatic conditions

plume rise | |

stack gas exit speed | |

stack diameter | |

average wind speed | |

stack heat emission rate |

plume rise for neutral stability conditions

plume rise | |

stack gas exit speed | |

stack diameter | |

average wind speed | |

stack heat emission rate |

plume rise for subadiabatic conditions

plume rise | |

stack gas exit speed | |

stack diameter | |

average wind speed | |

stack heat emission rate |

Where

C | = | downwind concentration |

Q | = | pollution source emission rate |

u | = | average wind speed |

σ_{y} | = | y direction plume standard deviation |

σ_{z} | = | 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.

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