Holland plume rise

In this example, we shall apply the Holland plume rise equation (Equation 10). There are, however other expressions that may be used (refer to Table 2 for other formulae) ... 

Holland Ah = (1.5V,d -H 0.04QJ/U where Ah — plume rise (m), Vj = stack exit velocity (m/s), d = stack diameter (m), = heat emission rate (kcal/s), U = stack top wind speed (m/s) Highly empirical. Requires stack testing confirmation on case-bycase basis... 

The Pasquill-Gifford dispersion parameters and Holland s plume rise equations. 

A proposed source is to emit 72 g/s of a toxic pollutant from a stack 30 meters liigh with a diameter of 1.5 meters. Tlic effluent gases are emitted at a temperature of 250 F (394K) with an exit velocity of 13 m/s. Using Holland s plume rise equation, obtain the plume rise as a function of wind speed for stability classes B and D. Assume that the design atmospheric pressure is 970 mbar and that the design ambient air temperature is 20 C (293K). 

Many more plume rise equations may be found in the literature. The Environmental Protection Agency (EPA) is mandated to use Brigg s equations to calculate plume rise. In past years, industry has often chosen to use the Holland or Davidson-Bryant equation. The Holland equation is... 

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