![]() Single-tower, chemical deliquescent dryers use little energy, but provide a pressure dew point suppression of 15 to 50☏ below the dryer inlet temperature, depending on the desiccant selected. The following is an excerpt from CAC’s “Improving Compressed Air System Performance: A Sourcebook for Industry”.Ĭompressed air system performance is typically enhanced by the use of dryers, but since they require added capital and operating costs (including energy), drying should only be performed to the degree that it is needed for the proper functioning of the equipment and the end use. ![]() The Compressed Air Challenge also has a number of resources available to those who are interested in learning more about compressed air dryers. ![]() Even if desiccant dryers are needed, many plants that require -40F or better dew point are using the low initial cost heatless dryer technology which is the most expensive to operate,” says Jan Zuercher, Director of Air Systems for Quincy Compressor, and a certified CAC Fundamentals Instructor, “There are more energy efficient desiccant dryer technologies available today that offer excellent payback opportunities.”Īttendees of the Compressed Air Challenge, Fundamentals and Advanced training learn about the types of air dryers and the differing characteristics that affect system performance. “Significant energy can be saved if the plant is operating desiccant dryers when a properly designed refrigerated dryer installation would provide adequate air treatment. “In selecting dryers, always consider the required dewpoint and the initial price compared to total operating costs,” says Bill Scales, co-author of CAC’s Best Practices Manual and a certified Advanced Level instructor, “Higher quality air usually requires additional equipment and can lead to increased capital investment and possibly higher operating costs.”įor example, using standard uncontrolled heatless desiccant dryers may cost 3 to 4 times more than using a similar sized refrigerated dryer. One of the keys to optimal system operation is ensuring the air is only dried to the level required by the actual needs of the facility. ![]() Compressed air dryers are important items to consider when evaluating the efficiency of a typical compressed air system. ![]()
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