Applications; Method Of Operation - Dehutech 450 Technical Manual

Applications

Dehumidifier DehuTech 450 is of the solid des-
iccant wheel type designed to dry air of atmos-
pheric pressure. The dehumidifier can be used
for drying air of up to 100 % relative humidity
(RH) with temperatures from -30 ºC to +40 ºC.
The applications are numerous and wide spread.
Below are some examples:
• Controlling humidity levels in production
processes.
• Drying of temperature sensitive products.
• Maintaining correct humidity in storage
areas.
• Protection of equipment sensitive to corro-
sion.
• Controlling humidity levels in museums and
archives.
• Drying after water damage and drying of
buildings during construction.
• Climatic improvements in damp areas.
Subject to change without notice

Method of operation

The dehumidifier operates with two air streams.
A larger air stream to be dehumidified, and a
smaller air stream to exhaust the moisture out of
the desiccant rotor.
Two fans inside the dehumidifier create air
streams which travel trough the desiccant rotor
in opposite directions.
The larger air volume, the process air, passes
through the slowly rotating silica gel rotor.
Silica gel is a hygroscopic material adsorbing
water vapour direct from the air. When pass-
ing through the rotor the humidity of the air is
reduced, whilst the moisture content of the rotor
material increases. On exiting the rotor the dried
air is introduced into the area, or the process to
be dehumidified. The adsorption process works
in temperatures from -30 ºC to +40 ºC.
The smaller air volume, the reactivation air,
adsorbs the moisture from the silica gel rotor.
This reactivation air is heated by an internal
heater to a temperature of approximately +100
ºC. As the reactivation air passes through the
rotor, in an opposite direction to the dry air, it
will decrease the moisture content of the rotor
material. The reactivation air will leave the
dehumidifier as warm, moist air, which is then
exhausted out from the building.
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DehuTech 450