4x5, good onya for thinking about the problem, but a liquid cooling system won't make things any cooler than the ambient air.

The only common device which will remove heat from air is a typical air conditioner unit, though Peltier-effect (PE) cooling devices are kinda interesting. Very expensive, but mechanically mucho simpler than gas compression and evaporation air conditioning, not to mention just plain interesting. PE devices work like turbocharged heatsinks, but still require a place to dump their heat.