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dispersion equation different forms

Calculation of Effective Stack Height. Note that H = hs ?h, where ?h is the stack rise.Stack rise is dependant on stack characteristics,Meteorology, and physico-chemical nature of effluent.. * Carson-Moses Equation:. * Holland Formula:. * Concawe Formula:. Where . Preferred Equation for Stack Rise.

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dispersion equation different forms

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    1. Dispersion Equation – Different Forms

    3. Preferred Equation for Stack Rise

    4. Wind Velocity U for the Model U = f(z) given by (U/U1) = (z/z1)p, where p depends on on atmospheric stability. Appropriate value of U for dispersion model is the mean value through the plume. If mean U is unavailable, use appropriate U at stack height. In most cases only U10m is available- then correct for U at stack height using above equation. If no mention of height of measurement of U is made use U as mean. If measured height is specified for U, then correct for it to get U at stack height.

    5. Estimating Emission Rate Q for Various Scenarios: (Ref: A Kumar, Pollution Engineering, p 52, February (1996)

    6. Concentration Isopleths

    7. Model of flow around a sharp edged 3-D building in a deep boundary layer

    8. Cavity Length for Short and Long Buildings

    9. Effective stack height with buildings

    10. Effective stack height with buildings – continued.

    11. Concentration in Cavity Wake.

    12. Concentration immediately downwind of wake cavity

    13. Obtaining ?y and ?z

    14. Stability Classes

    15. EPA Air Quality and Dispersion Models

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