Pre-cooled air for pumps and compressors?

[MarkUK]

First of all, I use air from the dive shop, so I my interest in this is about the physics.

I expect many of you have your hand pump or compressor sitting in the utility room, next to a deep freeze.

As well as all the rabbits, turkeys and cuts of deer and boar that you have shot, your freezer contains air at around -20c (-4f).

This air will be pretty dry already (cold air can contain very little moisture) and it will take around 15-20% less energy to compress than room temperature air.

So. Have people considered taking a tube from their freezer to the intake of their pump or compressor? Or used another method to pre-cool the intake air?

 

[MarkUK]

Actually, when I think about it, cooling the output of the 'shop' compressor that you use before a Shoebox type would produce even more time/energy/wear savings on the Shoebox.

 

[Bleudg]

Cooling the air at any location in the air system will help remove moisture from the system by lowering the dew point. I use a Refrigerated air dryer between my shop air compressor and Shoebox which drops the air temp to about 35 degrees F.
The addition of a Desiccant dryer lowers the dew point down into the subzero range.

 

[MarkUK]

Thanks Bleudg, that looks like a good setup. The cold air will be taking some strain off the Shoebox.