[Logic11]

The easiest way to avoid going below the dew point; always, for certain, cheaply
is evaporative cooling.

Reqd:
External rad.
Ultrasonic mist maker/s mist going onto/through rad.
Your fans will be fine thx to centrifugal force...

You need to get the humid air out the room and/or fresh/dry air in/through the rad, or it will become saturated with humidity and then evaporation stops...

It's much cheaper than throwing electricity and expensive cooling/chiller hardware at the 'below ambient cooling' challenge.

 

[Logic11]

No you absolutely do.... You will absolutely never go below ambient temperature without somekind of phase change

Remember the old 'Bong Cooler' days?

Here's a fellow cooling a TEC, cooling a CPU OCd to 1580 MHz!

• Idle: -14C
• Load: 4C
• Coolant 4C below ambient in reservoir.

Nuclear Tower Water Cooling - Overclockers

ED NOTE: This article is 5 pages long. Those of you running peltier cooled T-Bird rigs are probably aware that you are pushing the limits of standard water cooling methods. Many vendors claim their coolers are capable of “handling” several

www.overclockers.com

So yes; below ambient IS possible with evaporative cooling.

So:

6 mins in
Through a rad..?
(To avoid the whole: Algae build-up and no cooling when all the water's evaporated thing..?

Soz; I'm derailing tread here

 

[Logic11]

I mean technically you are lowering the ambient in the bong cooler which cools pc. So it is ambient technically.

ah...
Er... no; below ambient of the room would be 'Sub Ambient' in any argument IMHO.

But point is:
With a 100% efficient Evap Cooler; you just cant ever go below the dew point as that's the point at which water vapour in the air starts condensing out.. NOT evaporating into the air...

And much cheaper than refrigeration tech and dew point sensors etc.