REMKO ETF 360 - Manual (Page 5)

5
Condensation of water
vapour
Since the maximum water vapour
volume increases when the air is
heated, but the contained water
vapour volume remains the same,
this results in a reduction of the
relative humidity.
In contrast, when the air is
cooled, the capacity to absorb the
maximum water vapour volume
reduces, the water vapour volume
contained in the air remains the
same and the relative humidity
increases.
If the temperature falls further, the
capacity to absorb the maximum
water vapour volume is reduced
until it is equal to the contained
water vapour volume.
This temperature is called dew-
point temperature. When the air
is cooled below the dew-point
temperature, the contained water
vapour volume is larger than the
maximum possible water vapour
volume.
Water vapour is discharged.
This condenses to water, moisture
is removed from the air.
Examples of condensing are misted
windows in winter or misting of a
cold drinks bottle.
The higher the relative humidity,
the higher the dew-point
temperature, which is easier to fall
below.
Building materials or structures
can absorb substantial amounts
of water, e.g. bricks 90-190 l/
m³, heavy concrete 140-190 l/m³,
lime-sand bricks 180-270 l/m³.
The drying out of moist materials,
e.g. masonry, takes place as
follows:
■ The contained moisture moves
from the inside of
the material to its
surface
■ Evaporation takes
place on the
surface = transition as water
vapour to the ambient air
■ The air enriched with
water vapour continuously
circulates through the REMKO
dehumidifi er. It is dehumidifi ed
and leaves the unit at a slightly
higher temperature to absorb
water vapour from anew
■ In this way, the moisture
contained in the material is
gradually reduced
The material dries!
The produced condensation
is collected in the unit and
discharged.
Drying materials
Verdampfer Kondensator
°C
30
25
20
15
% r.F.
100
90
80
70
60
50
40
30
20
10
+
+ -
Lufttemperatur
Luftfeuchte
Verlauf
Luftrichtung
The air fl ow is cooled on its way through or via the evaporator to
below the dew-point. The water vapour condenses and is collected
in a collection tray and discharged.
Temp. Water vapour content in g/m 3 at a humidity of
°C 40% 60% 80% 100%
-5 1.3 1.9 2.6 3.3
+10 3.8 5.6 7.5 9.4
+15 5.1 7.7 10.2 12.8
+20 6.9 10.4 13.8 17.3
+25 9.2 13.8 18.4 23.0
+30 12.9 18.2 24.3 30.3