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2. By the air dehumidification:
The moist air in an enclosed room is continuously dehumidified by the condensation
principle. In terms of energy consumption the air dehumidification has one essential
advantage: The energy expenditure requirements are limited by the air volume in the existing
room only. The mechanical heat released during the dehumidification process slightly
increases the air temperature in the room.
When properly used the dehumidifier consumes about 25% of the energy that would be
needed for the „heating and ventilation".
The relative air humidity
The ambient air is a gas mixture that always contains a certain amount of water in the form of
water vapor. This water percentage is expressed in g per kg of dry air (absolute water
content).
1 m3 of dry air weighs about 1,2 kg at 20° C.
Depending on the temperature each
kg of the air is only able to absorb a certain amount of water vapor. When this absorptive
capacity is reached the air becomes "saturated" and the relative humidity becomes 100%.
The relative humidity is understood to be the ratio between the water vapor percent currently
contained in the air and the maximum water vapor percent at the same temperature.
The
ability of air to absorb water vapor increases with temperature increasing. This means that the
maximum (= absolute) water content increases with temperature increasing.
-5
+10
+15
+20
+25
+30
1,3
3,8
5,1
6,9
9,2
12,9
1,9
5,6
7,7
10,4
13,8
18,2
2,6
7,5
10,2
13,8
18,4
24,3
3,3
9,4
12,8
17,3
23,0
30,3
40%
60%
80%
100%
3
Water vapor content in g/m in the air at the
humidity of
Temp. °C
Summary of Contents for DEH-1700P
Page 1: ...D EH 1700P Air dehumidifiers Operation manual...
Page 2: ...R www danvex fi 1...
Page 19: ...R www danvex fi 18 Wiring diagram...
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