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TRusselo's Submerged PC

post #1 of 35
Thread Starter 
nevermind....
Edited by TRusselo - 3/5/14 at 7:55pm
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post #2 of 35
the thing about submerged oil is even the fans are not needed. Oil behaves differently from air. It transfers heat MUCH faster. Hot air needs to move an oil cooler should be able to cool with nothing but internal convection. eventually the netire air bath will become warm, as the oil still needs to transfer heat to the air but it should become warm more or less all at once.
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post #3 of 35
Thread Starter 
screw it.....
Edited by TRusselo - 3/5/14 at 7:56pm
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post #4 of 35
There is not going to be enough surface air for the oil to pull heat from the GPU and CPUs. You will need some form of passive heat sinks on the GPU and CPU for the oil bath to work. Additionally, there will need to be some form of oil movement.
 
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post #5 of 35
Quote:
Originally Posted by Lord Xeb View Post

There is not going to be enough surface air for the oil to pull heat from the GPU and CPUs. You will need some form of passive heat sinks on the GPU and CPU for the oil bath to work. Additionally, there will need to be some form of oil movement.

You are correct about heatsinks. I was referring only to fans. My understanding is that with a heat sink simple passive convection alone is sufficient. Heatsinks designed for air cooling are massive overkill for something as efficient as oil. This would be even more true if the bath was, say, water. I am specifically recalling various descriptions of running oil bath systems where the owners mention that the fans are actually unnecessary.

IMHO the entire point of an oil bath system is to remove noise and moving parts entirely. A mechanical pump and fans outside the box kind of defeats the purpose of the thing. Personally, if I was to build an oil bath system, the object should be to remove the need for a mechanical fan/radiator setup. I wonder if this might be possible by something as simple as, say standing a piece of expanded copper grill, ore even just a bunch of copper pipe inside the unused area of the aquarium several feet into the air.
Edited by bombastinator - 12/30/13 at 5:31am
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post #6 of 35
Quote:
more, colder liquid/air/gas quicker, is quicker cooling. period.
Correct, which is why the owners often left the fans on. It's a question of moe is better vs how little you can get away with. Would your system provde more cooling than a fan? Very possibly. My point is that even the fans aren't really needed on a regular system.
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post #7 of 35
I'd be very interested in seeing how you make out without a metal heat sync. I did this a while back and I never tried it without the heat sync.

One thing to caution you is that the thermal paste WILL dissolve between the heat sync and the CPU. As will any other thermal paste within the rig (components you didn't even know had thermal paste on it will stop working!)

It's certainly a fun project! I'm anxious to see how you make out biggrin.gif
    
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post #8 of 35
Thread Starter 
not fond of whats going on here....
Edited by TRusselo - 3/5/14 at 7:56pm
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post #9 of 35
Quote:
Originally Posted by TRusselo View Post

well the point of my experiment is not to be silent, its to be cold. And this is not supposed to be an oil bath, its a cool oil Jacuzzi. And actually in all my research i have never seen a submerged computer done with any bit of intelligence or care that does not have a rad, pumps and fan.

And if you keep enough fluid moving over the chip, you can equal or exceed the surface area of the heatsink.

With fully submerged 2 stage phase change heat exchange systems, they run only a small wafer heatsink, with a spined face and a special powder coating to increase surface area, however this is only required, because as this type of coolant heats to 34 degrees, it boils into a gas, while still touching the heatsink, creating many small pockets of poor cooling on the sink, until the bubble is large enough to float away. The ribbed surface draws the bubbles out to the tip of the spikes away from the actual face, and also serves to tripple the surface area to make up for the bubbles, as they are poorer at removing heat than the liquid.

My system, not using a coolant with a boiling temp anywhere near that low, I would never have bubbles. No need to wick them away from the chip face, or make up for their lack of cooling, just need to keep cold coolant on the chip.

And did you miss the part where i said i live in Edmonton Canada? its freezing or below outside 6 months of the year. who needs fans on the rad?

No need to get defensive.


I'm anxious to see your progress, but you won't get many supporters with an attitude like this.
    
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post #10 of 35
Quote:
Originally Posted by TRusselo View Post

well the point of my experiment is not to be silent, its to be cold. And this is not supposed to be an oil bath, its a cool oil Jacuzzi. And actually in all my research i have never seen a submerged computer done with any bit of intelligence or care that does not have a rad, pumps and fan.

And if you keep enough fluid moving over the chip, you can equal or exceed the surface area of the heatsink.

With fully submerged 2 stage phase change heat exchange systems, they run only a small wafer heatsink, with a spined face and a special powder coating to increase surface area, however this is only required, because as this type of coolant heats to 34 degrees, it boils into a gas, while still touching the heatsink, creating many small pockets of poor cooling on the sink, until the bubble is large enough to float away. The ribbed surface draws the bubbles out to the tip of the spikes away from the actual face, and also serves to tripple the surface area to make up for the bubbles, as they are poorer at removing heat than the liquid.

My system, not using a coolant with a boiling temp anywhere near that low, I would never have bubbles. No need to wick them away from the chip face, or make up for their lack of cooling, just need to keep cold coolant on the chip.

And did you miss the part where i said i live in Edmonton Canada? its freezing or below outside 6 months of the year. who needs fans on the rad?
It could cook though. Turn to a solid and deposit on the heat spreader causing the same problem. Didn;t see the bit about you not using any heatsink at all. Yeah, you'd need a pump for that. Probably a pretty big one. You're also going to probably want to have an ability to vary the size of the openings, much like a hushold air system, you don't want all the cool spilling out the first outlet. You need to deliver it across th entire system.

PVC valves would probably work. You'll want gate valves rather than ball valves, they're much more adjustable.
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4770k some mid range asrock. extreme 4 maybe? 2x gigabyte windforce 7950 2 x 8 corsair balistix sport 
Hard DriveOptical DriveCoolingOS
crucial ct960 LG blu-ray used venamous x win 8.1 pro 
MonitorKeyboardPowerCase
Crossover 30Q5 PRO 30" 2560X1600  cheapest piece of crud I could find antec HCG 750 some thermaltake microcenter blue-light-special... 
MouseMouse PadAudio
came with the cheapass keyboard who cares? some $30 no name 2+sub speakers I bought at mic... 
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New gaming rig
(15 items)
 
  
CPUMotherboardGraphicsRAM
4770k some mid range asrock. extreme 4 maybe? 2x gigabyte windforce 7950 2 x 8 corsair balistix sport 
Hard DriveOptical DriveCoolingOS
crucial ct960 LG blu-ray used venamous x win 8.1 pro 
MonitorKeyboardPowerCase
Crossover 30Q5 PRO 30" 2560X1600  cheapest piece of crud I could find antec HCG 750 some thermaltake microcenter blue-light-special... 
MouseMouse PadAudio
came with the cheapass keyboard who cares? some $30 no name 2+sub speakers I bought at mic... 
  hide details  
Reply
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