Learning About Cyclones

:: Section 7

Collection Efficiency

II. Licht's Model

The other theory that is based on the assumption of turbulent flow with lateral mixing is developed by Licht. Similarly the particle size with 50% collection efficiency needs to be determined first. For the Licht's theory, it is:

where n is vortex exponent and A is a pre-factor that is to be determined according to:

where K is configuration factor, Q is air flow rate and D is cyclone body diameter. n and k can be found out from the table in Section 6. The collection efficiency for other particle size can then be calculated according to:

The overall efficiency for the entire aerosol size distribution can then be determined according to:

Where f_j is the fraction of the size range.