Dryer & Air Quality
IS DRY, DRY ENOUGH?
Be careful to choose the drying method which best fits your application.
A. Air Cooled Aftercooler - able to reduce air temp to ~80F and remove up to 50% of moisture.
B. Water Cooled Aftercooler - able to reduce temp to ~60F and remove up to 75% of moisture
C. Refrigerating Dryer - able to reduce air temp to ~38F and remove up to 90% of moisture.
D. Desiccant Dryer - able to reduce air temp to ~-40F and remove 99% or more of moisture.
E. Remaining Moisture - ~1%
Remember to match your dryer purchase to your actual needs. Even if you have outside (exposed) lines requiring -40F dewpoint in winter, it can still be cost effective to purchase and operate a refrigerated dryer during warmer months when a 38F dewpoint will suffice.
Locating and Sizing Air Receivers
Common Receiver Sizes
|Size in inches||Volume in cu. ft.||Volume in Gallons|
|20 x 60||11||82|
|24 x 72||19||141|
|30 x 48||35||257|
|36 x 96||57||423|
|42 x 120||96||720|
|48 x 144||152||1,128|
|60 x 168||275||2,062|
|60 x 192||314||2,356|
The role of the receiver is to help smooth out periods of high demand and allow your compressors time to act appropriately to changes in system demand. Essentially to give the system capacitance.
One receiver should be located in or at the compressor room. As a rule of thumb, its volume should be at least 5% of the of the total compressor(s) output volume in cu.ft.
Locate receivers in the plant at high use locations. This will help resolve local pressure/velocity issues and help reduce the overall pumping setpoint.