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Theory of Operation Teledyne API - Model 200EH/EM Operation Manual
202
10.3.6. O3 GENERATOR
The M200EH/EM uses a corona discharge (CD) tube for creating its O
3
. Corona discharge generation is
capable of producing high concentrations of ozone efficiently and with low excess heat. Although there are
many cell designs, the fundamental principle remains the same (Figure 10-10-11).
Figure 10-10-11: Ozone Generator Principle
The M200EH/EM utilizes a dual-dielectric design. This method utilizes a glass tube with hollow walls. The
outermost and innermost surfaces are coated with electrically conductive material. The air flows through the
glass tube, between the two conductive coatings, in effect creating a capacitor with the air and glass acting as
the dielectric. The layers of glass also separate the conductive surfaces from the air stream to prevent reaction
with the O
3
. As the capacitor charges and discharges, electrons are created and accelerated across the air gap
and collide with the O
2
molecules in the air stream splitting them into elemental oxygen. Some of these oxygen
atoms recombine with O
2
to O
3
.
The quantity of ozone produced is dependent on factors such as the voltage and frequency of the alternating
current applied to the CD cells. When enough high-energy electrons are produced to ionize the O
2
molecules, a
light emitting, gaseous plasma is formed, which is commonly referred to as a corona, hence the name corona
discharge generator.
04521C (DCN5731)