Page 1
The dehumidifier removes water from an airflow through, and
the removed water is carried away from the dehumidifier with
the regeneration air (henceforward called reg.-air).
Water adsorption and -extraction takes place in an rotor made
of water resistant silica gel.
The air flows in the dehumidifier divides the rotor in two
parts : drying part and reg.-part.
Two separate air flows goes through the rotor as this:
- the main air (moist air inlet) goes through the drying
part, and leaves the dehumidifier as dry air
- the reg.-air coming from the outside through the internal
hose to the reg.-air fan, goes through the electric PTC-
heater and will be heated to 130C (at 20C inlet).
Going through the reg.- part this energy will be used for
evaporation of the adsorbed water. The water vapours and
the reg.- air now leaves the dehumidifier through the reg.
- air outlet (see page 2, fig. 2).
The two air flows are fixed and the rotor turns - this gives
an automatic process of simultaneous water adsorption and wa-
ter extraction.
The inlet conditions of the air to be dried, determines how
much water the dehumidifier will remove.
On page 8 the capacity diagram shows how much water will be
removed per kg air going through.
(shown in the diagram R617)
- inlet air conditions 20C, 60 %RH, gives water content 8,7
g/kg
- the diagram shows then dry air condition of X= 3,9 g/kg
- removed per kg air is then: 8,7 - 3,9 = 4,8 g/kg
Dry air flow is nominal 100 m3/h = (x 1,2) = 120 kg/h
Capacity, removed water per hour = 120 x 5,0 = 600 g/h
= 14,4 kg/24h
- at 230V.
The temperature of the dry air is higher than for the inlet
air. This is caused by the evaporation heat release and heat
gain from the rotor. The temperature is shown to be 42C.
1. PRINCIPLE OF OPERATION.
CAPACITY DIAGRAM R617.
Example:
Capacity of CR100 at this condition:
