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| Desiccant Dehumidifier |
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Dehumidifier is an equipment to remove the moisture which already exists on the ambient air and its percentage changes every day according to the weather.
Warm air
when passes over a cooled surface then the moisture ”Humidity” starts to
accumulate “condensate” over that cooled surface as water “Like the cooled
water bottle in warm place” and the dehumidifier does the same thing.
Dehumidifier consist of:
- Fan
- Fan motor
- Compressor
- Cooling coils
- Reheater
- Reservoir
How does dehumidifier work?
Simply the fan
starts to suck the surrounding air and pull it inside the dehumidifier passes
through the cooling coils which, the refrigerant (Freon) passes through at low
temperature then the moisture of the air starts condensation as a water drips
stay on the cooling coils then accumulated to drip into the reservoir then the
dehumidifier (Refrigerated Coil dehumidifier) reheats the air and delivers to
the space “Room”.
Humidistat used
to control the required humidity and consists of:
·
Humidity sensor: sense the changes of the relative humidity as
an electrical resistance between the sensing element conductors.
·
Relay amplifier: measures this resistance and send a
signal to turn on/off the dehumidifier.
Dehumidifier types
- Refrigerated Coil dehumidifier
- Desiccant dehumidifier: consisting of motor used to rotate the rotor (which contains the desiccant material such as silica gel) and the room air delivered by a first fan to pass through the rotor desiccant material “silica gel” which, absorbs the air moisture then a second fan used to extract the moisture from the rotor “to maintain the dehumidifying rate” by forcing a heated air by passing it through a heater then to the moist rotor.
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