22
Humidity
Ultrasonic atomization –
the precise and energy-efficient way of humidification
For all applications requiring an exact setting
of the air humidity, the ultrasonic atomization
in combination with the dehumidification
methods is the best choice. This way of
humidification is only available in the
Premium-Line. The desired humidity can
be preselected by means of the electronic
PID-controller, which is integrated in the
CONTROL2015
touch
. The adjacent diagram
gives an overview of the application range.
The dehumidification can be effected in
three different ways: as standard dehumidi
fication, as deep dehumidification and as
compressed air dehumidification (see below).
This combination of humidification and
dehumidification allows quick humidity
variations and a wide range of climate
simulations. For instance, it is possible to
achieve high humidity values at low
temperature values. The ultrasonic
atomization has many further advantages:
In comparison with the steam humidifica-
tion, the ultrasonic atomization avoids an
The dehumidification is realized by conden
sation or freezing of the water vapour
contained in the air at a plate heat-exchanger
of stainless steel in special design. Periodical
hot gas defrosting thaws the frozen water,
which will be dripping into the condensate
drain.
Standard
dehumidification
Extremely low humidity values at low
temperatures can be achieved by our com-
pressed air dehumidification. The customer-
supplied dry compressed air will expand in
the test room, thus reducing the relative
humidity. This application is particularly
advantageous for temperature alternating
tests, where it is essential, that conden
sation is to be avoided completely.
Compressed air
dehumidification
unintended heating of the test room. The
humidification by means of an ultrasonic
atomizer is considerably more economic
regarding energy and water consumption
and, in addition, requires only low mainte
nance, since demineralized water is used.
This version is a modification of the
standard dehumidification with higher
efficiency. The air flow above the
humidifier is controlled or reduced by
means of a special valve.
Deep
dehumidification
Aerosol mist without heat introduction into the test room.
Diese Version ist eine Modifikation der
Standard-Entfeuchtung mit größerer
Leistungsfähigkeit. Der Luftstrom über dem
Befeuchter wird mit Hilfe eines Spezialven-
tils gesteuert bzw. reduziert.
20
40
60
80
100
50
40
30
20
10
Temperature °C
rel. Humidity %
Temperature-humidity
Diagram
