View Full Version : Submerged Oil Cooling (PC in a tank)

18-03-2010, 03:43 AM
Hey guys , i have seen this done on a couple of websites and would like to give it a go on an old pc that i have. I have the fish tank ready and i have a good supply of Polyolester oil but everyone i have seen is using mineral oil.
I know that poe acts as a solvent ,would it be to harsh on electronics ?? any advice appreciated
cheers Andy

18-03-2010, 08:36 PM
Would it be wise to have that type of oil exposed to the atmosphere?

"They, POE, are highly hygroscopic and absorb water which is almost impossible to drive out."

18-03-2010, 09:33 PM
Use good old transformer oil.

20-03-2010, 01:33 AM
POE will absorb up to 2500ppm from the research that i have done. Is this a significant amount of water? , i dont think so , so i am willing to give it a go on an old pc for starters and see how it runs.
I have a condenser that i am going to pump oil through for cooling when it reaches a certain temp in the tank.

16-07-2010, 09:25 AM
This is a great post.It helps me to increase my knowledge.


16-07-2010, 09:37 AM
Use good old transformer oil.
Thanks for your post.


01-08-2011, 12:32 AM
I did this years ago... I was only about 13 at the time...

I took a standerd upright fridge freezer... and chopped the freezer off the top of it... then lay it on it's back so it was like a mini chest freezer...

then I stripped down a small undercouter freezer (carefull not to damage any pipes etc..) and used that to cool the oil... (I cut out a small chunk at the door of the dreezer to put the pipes through)

installed my pc in the box... then filled it with about 7 gallons of oil... standerd diesel engine oil (from my fathers garage)

it worked really well.. and would go down to -30'C

only problem was, the oil was very thick at that tempriture so the oil around the cup etc.. would heat up while the rest of the oil was still at -30'C

water/moisture wasn't a problem... any moisture getting in froze and dropped to the bottom of the box... every few weeks I'd put a thick plastic bag on my hand/arm and reach in to pull it out.... wow that was cold :o