Pneumatic-Source.com -- Pneumatic Manufacturer Directory, Pneumatic Cylinders, Pneumatic Valves, Pneumatic Tools, Pneumatic Actuators


Compressed Air Encyclopedia

Refrigerated Air Dryers
in
Contributed by: admin  

Refrigerated air dryers reduce the temperature of compressed air to a point where the moisture contained within the air will condense into a liquid.

Refrigerated air dryers reduce the temperature of compressed air to a point where the moisture contained within the air will condense into a liquid.

Pressure dew points as low as 35°F can be achieved with refrigerated air dryers.

Tube-In-Tube Direct Expansion Refrigerated Air Dryers

Moist compressed air flows through the inner tube of a tube-in-tube system while refrigerant flows through the outer tube. As the moist, compressed air is cooled, moisture within the air condenses and is collected and drained from the dryer.

In single-stage refrigerated air dryers, the exiting dry air is so cold that condensation forms on the outside of pipes downstream from the dryer.

A two-stage refrigerated air dryer adds a second heat exchanger to reduce the condensation problem considerably. The additional stage also uses a tube-in-tube system, with cold dry air flowing through the inner tube and moist, warm inlet air flowing through the outer tube. The extra stage offers two benefits: it raises the temperature of the outgoing air, and pre-cools the incoming air, which reduces the load on the dryer and allows it to operate more efficiently.

Chilled-Mass Refrigerated Air Dryers

A chilled-mass dryer uses refrigerant to cool an intermediate substance such as glycol or aluminum granules. As the compressed air passes through the midst of the secondary substance its temperature is lowered, and the moisture within it is condensed, collected and drained.

Water-Chiller Refrigerated Air Dryers

A water-chiller dryer is very similar to the chilled-mass dryer, but instead uses water as the secondary mass.

A refrigerant cycle cools the water that in turn cools the compressed air. A water pump is required to maintain water flow through the heat exchanger.

powered by: Wordpress

eXTReMe Tracker

contact us | recommend our site | advertise | add your company | privacy policy | employment

xml feedrss feed