B–8 Series 3080 Electrostatic Classifiers
Figure B-5
Flow Schematic for the Electrostatic Classifier with Nano DMA in Dual Blower Mode
Charging Theory
The particle charge distribution used in the data reduction for the
SMPS is based on a theoretical model developed by Wiedensohler
[1986] and is an approximation of the Fuchs [1963] diffusion theory
for particle sizes in the submicrometer range.
Figure B-6 shows the measured data of Wiedensohler [1986] and
theoretical curves based on the theory of Fuchs [1963] and
calculated by Wiedensohler [1988]. The theoretically determined
charge distribution agrees well with experimental data. It can be
seen from the figure that the fraction of positively charged particles
is different from the fraction of negatively charged particles.
Table B-1 lists the fractions of particles in air that carry -6, -5, -4,
-3, -2, -1, 0, +1, +2, +3, +4, +5, and +6 charge units. This table was
calculated based on Wiedensohler [1988] and Kim et al. [2005].
To Next Page
Loading...
Need help?
General
