Next the pressure line would run from the coil, outside of the fridge, into a drying canister. I would build the canister myself, because I want it to be much larger than standard sizes are, but one could purchase one. HF sells a divilbiss knockoff that I have used with good success.
Finally the pressure line would run from the canister into my compressor tank. That way, the moisture is gone before it gets to the tank, and the air is cool in the tank, which should give the tank a slightly larger capacity.
The only problem I can think of, is that the refrigerator would have to turned on all the time, to maintain the temperature of the water. It shouldn't raise your electric bill much, but I'm sure it will be noticeable. Right now, this is all theory for me, but when I get a chance, I think I will try it. If anybody can improve on this idea or give me a reason why it wouldn't work, please let me know.