REMKO ETF 320 - 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 maxi-
mum water vapour volume redu-
ces, the water vapour volume con-
tained 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 water vapour volume.
Water vapour is discharged.
This condenses to water, moisture
is removed from the air.
�xamples of condensing are misted
windows in winter or misting of a
cold drinks bottle.
The higher the relative humidity,
the higher the dew-point tempera-
ture, which is easier to fall below.
Building materials or structures can
absorb substantial amounts of wa-
ter, 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 fol-
lows:
■ The contained
moisture moves
from the inside of
the material to its
surface.
■ �vaporation takes place on the
surface = transition as water va-
pour to the ambient air.
■ The air enriched with water
vapour continuously circulates
through the R�MKO dehumidi-
fier. It is dehumidified and lea-
ves the unit at a slightly higher
temperature to absorb water
vapour from anew
■ In this way, the moisture contai-
ned in the material is gradually
reduced
The material dries!
The produced condensation is col-
lected 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 flow 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/m³ 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