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Liquid Nitrogen in Water Cooling Loops?  

post #1 of 18
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OK so we've seen water cooling around for quite a few years now, and Liquid Nitrogen has become a bit more towards becoming mainstream, but what's there to stop us from having our water cooling setups having Liquid Nitrogen running through them?

We've seen new water cooling setups lately with copper pipes between the components and pretty much all water blocks are made from copper. Fittings I assume would be safe for LN to pass through. So my guess would be that the only problem is the reservoirs and pumps are the only things that wouldn't survive.

Could you imagine how cool it would be to have LN running through your systems veins continuously?!
post #2 of 18
What happens after you fill your closed-loop system with a liquid which then sublimates into an expansive gas because of the difference in temperature?
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post #3 of 18
Well just ignoring the tubing issues, even if it is done with copper, how do you propose you would keep the nitrogen in liquid form? It's going to warm up, turn into a gas, fill the loop with it, and expand within it. There's many issues with it but that's just one of the simpler ones I'm curious about.
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post #4 of 18
In response to the sublimation issues. What if we could keep the pressure within the loop high enough to keep nitrogen in its liquid phase? I don't know exactly how much pressure is needed for that to happen so it might not be feasible.
post #5 of 18
Interesting thread, this stuff excites my curiousity.
However I don't think it would work in a closed system.
http://www.ornl.gov/info/reports/m/ornlm3063r1/pt9.html

Maybe you could do it in an evaporation style cooling system, such as a Bong cooler. Every article I have read states that when the LN boils it must be vented or it definitely will explode the container.

Maybe hook up one of these tongue.gif
http://blog.makezine.com/2010/06/07/diy-liquid-nitrogen-generator/
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post #6 of 18
I think this would only work well if you had a high-power chiller to remove heat from the LN and keep it in liquid form.
post #7 of 18
Not only that but a normal pump wont hold up to those temps . You would have a better chance of modifying a phase change unit to run it.
post #8 of 18
Quote:
Originally Posted by SageQi View Post

In response to the sublimation issues. What if we could keep the pressure within the loop high enough to keep nitrogen in its liquid phase? I don't know exactly how much pressure is needed for that to happen so it might not be feasible.

I'm no chemist but I can ask one of my chemical engineer friends for more exact info but I believe a vacuum chamber is not feasible and the pressure needed would be rather high.
Quote:
Originally Posted by mott555 View Post

I think this would only work well if you had a high-power chiller to remove heat from the LN and keep it in liquid form.

The cost in that alone would make it less than feasible. Let alone the complications of making it work.



Basically you would want to do phase change. A LN cooler for everyday use is not feasible and can really only work with benching. Even if something was created to work it would have so many failure points it wouldn't even be funny.
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post #9 of 18
Quote:
Originally Posted by TwilightEscape View Post


Basically you would want to do phase change. A LN cooler for everyday use is not feasible and can really only work with benching. Even if something was created to work it would have so many failure points it wouldn't even be funny.

/thread


LN2 is good for benching not because the LN2 itself cools down the chip, but because the LN2 pot which is holding the LN2 becomes subzero, thereby chilling the chip. There is probably a gas barrier between the bottom of the pot and the LN2 itself.

I understand you're just throwing an idea out there, but there's a reason you haven't seen the type of setup you're imagining.
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post #10 of 18
There simply isn't a point to this, as you would need one way valves to relieve pressure buildup from evaporating fluids. If you DID decide to build a LN2 cooler you would be dumping thousands of dollar into this before you got it to work properly. This simply isn't worth the money. For half the price you could use something like Novec 7000 and use it for a subzero cooling loop around 173kelvin (-100 Celsius) which could EASILY bring any CPU to it's max possible overclock. Since you'd be using a TEC chiller or phase change unit to cool the solution you'd be able to simply build a bigger chiller if you needed to accommodate a larger heatload. Since Novec 7000 is dielectric you could even throw your entire system into the zubzero fluid in a submerged liquid cooling rig.


There are far to many flaws in an LN2 cooling system to make it practical. (Excluding benching of course, that's an extremely simple system.)

It's an interesting thought, but would never work.
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