A refrigerated dryer uses a dryer that absorbs moisture in the air stream. A distinction must be made between adsorption and absorption. 

The composition of the dryer does not change and moisture can be removed during the regeneration process by using dry air for cleaning, applying heat, or a combination of both. You can also get information about the best refrigerated air dryers via https://compressedair.net.au/refrigerated-air-dryers/.

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Absorbed means that the material which attracts water vapor dissolves and is consumed by water vapor. The recording is done in an oven with a sensitive dryer.

Regenerative dryers with one dryer usually have twin towers. One tower dries the air from the compressor, while the dryer is regenerated in the other tower after the pressure in the tower is reduced to atmospheric pressure. 

Regeneration can be carried out using cycle times or, on request, by measuring the temperature or humidity in the drying tower or by measuring the dew point of air exiting the online tower.

Heat-activated regenerative dryers can have internal or external heat supplied by the heating device. In the internal type, steam or electricity can be used in heating devices attached to the drying layer. 

In an externally heated regenerative tumble dryer, the purge air is heated to a high temperature and then passes through the drying bed. 

The purifying air amounts to approximately 5-10% of the airflow through the dryer. Air injection from the compressed air system can be avoided by using a fan to circulate the heated atmospheric air through the dryer.