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2.1.2 Case
The
IFE - electronical precipitation engine
(Type
IFE 2000
) consists of a robust, easy
to maintain case construction made from corrosion-resistant steel plates.
2.1.3 Drive
The engine is driven by an electric motor, which is arranged axially in the current s
direction laterally protrudes from the case.
(for its
operating specifications
refer to chapter 3.2.1, page 8)
2.2 Operating effect
The operating effect of the
IFE - electronical precipitation engine
(Type
IFE 2000
) is
caused by electrically charging the particles in the air current by ionisation and
afterwards depositing them on the metal collectors.
For this effect it is urgently required that the used cooling agents do not attack
aluminium or synthetics.
The dirt particles in the air current will be precipitated when streaming past the following
filter stages and elements:
Filter stage 1
The metal pre-filter keeps back the biggest drops and pollutants as well as shavings.
Filter stage 2 (Ionisation zone)
The stream that is to be filtered will at first be led through the so called ionisation zone
of the precipitation engine. An electrical field of 10000 volts is forms by the tungsten
wires in the ionisation device. That is where the aerosols and other particles (both liquid
and solid) will be electrically charged.
The precondition for a sufficient electrical charging of the particles is that they have a
certain value of electrical resistance.
Beside the value of electrical resistance the polarisation (whether positive or negative)
has a decisive effect on the following precipitation. If the particles to be precipitated are
negatively polarised, there should be a negative charging in the course of streaming
through the ionisation device and vice versa. By this it is ruled out that opposed
polarisation reduces or neutralises the charging of the particles.
Filter stage 3 (Precipitation zone)
In the following precipitation zone the charged particles pass through the collection
device consisting of aluminium plates. Simultaneously to the current of air these plates
are alternatingly charged with ca. 6000 volts (opposite polarity) or grounded.
