Wull, this is not going to be popular but ...
Temps in Kunshan in summer run high nineties, low hundreds. But the worst part is, relative humidity must be 90% ? You can drink a gallon of water a day and not pee, but the sweat pouring off just soaks your clothes. It's not an easy situation for getting dry air.
Originally it was set up as some people suggest (there's two differing views on this out there, not just me being contrarian). Air from compressor (30 hp Sullair in this case) into a receiver with auto-drains then to a smaller refrigerator then out to the system. (It was a big loop in our case, had proper drops and all that.)
It didn't work for doodly. I'm not so sure this dew point thing is the magic people believe. For one, the air is highly compressed, which changes the dew point drastically. For another, does all the water fall out instantly at the dew point, or does a lot get carried along in the flow of air, which can be pretty speedy if you are feeding several air-gobbling machines ? Maybe you really want to go considerably below the dew point, to extract as much as possible ? And then pull the air for your machines from the driest possible place, rather than off a refrigerator which has air flowing through it at high speed ?
I swapped the reefer to right after the compressor, went for the max temp drop and to hell with the dew point, then stored the driest air we could get in the receiver. I can't see that storing wet air is a good idea. Kept the auto-drains (don't think they actually work that well, did it manually on a schedule as well) and we got way less water out of the receiver (as you'd expect) this way.
It made a large improvement. This runs counter to one of the popular air-drying theories but worked way better for us, in a nasty environment.