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Liquid Cooling With Mercury? - Page 5

post #41 of 115
Many reactors use Sodium but it has to be kept away from air as it gets all explody.

Carbon Dioxide is used in Magnox reactors, so that could work.

This is all coming from research into reactors so if it is good enough for one of them I see no reason it wouldn't work for a PC.
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post #42 of 115
Carbon dioxide isin't an option as the pressure required to keep it in it's liquid form is to great to make it usable in a loop. Maybe I just need to grow some balls and accept sodium as an idea, but again it has quite the high boiling point so it would need to be fairly diluted (hell no I'm not making that mix ^^ loll) and I feel like an aqueous solution wouldn't perform all that well since it has the same issue with a low-ish heat capacity.. I wish I knew more liquid metals.. Or had some info.
post #43 of 115
http://en.wikipedia.org/wiki/Graphene if u could use this stuff u wouldent even need a liquid
post #44 of 115
So why not use a diamond heat-sink, with diamond (hollow) tubing pumping liquid Hg.

or instead of Hg, Use Bose-Einstein Condensation. of course you would have to worry about your entire computer becoming superconductive, and the possibility of the superfluous liquid(quantum liquid at that temp (1 Millionth of a degree above Absolute zero ((o degrees K)) keep in mind liquid Helium is 4 degrees K and that's about -269 degrees Celsius


or laser cooling that metal (use sodium) to 1/1,000,000th of a degree above 0K (absolute zero)

Or by using Magnetic cooling which is capable of 100pK or 1/10th of 1/billionth of a degree above 0K (absolute zero) keep in mind that the deepest parts of space is a scalding 3K (3 degrees above absolute zero) this is because space isn't a PERFECT vacuum, it still has SOME molecules spread out through out which radiate slight amounts of heat.

Ln2 is 77K btw for all you extreme overclockers, at 30cents a liter, I prefer to go for Liquid Helium that's 14dollars a liter, of course watch out for the metals in your computer to become superconductive. lol.

and once the liquid is superfluous (zero viscosity) it wont need a pump, it is zero friction, it will flow indefinitely as long as the temp remains

http://www.youtube.com/watch?v=y2jSv8PDDwA

^^ AWESOME video.
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post #45 of 115
OH and btw using Mercury would beside the health issues, be less efficient at it. as it is only 12 times more conductive, its 30 times less efficient at holding the heat.
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post #46 of 115
what I mean is is that it would get saturated with the heat too fast, and not be able to disperse it as quick.

(if i am explaining that correctly) lol
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post #47 of 115
damn wish i could edit these lol, not to mention the shear fact that mercury is 13 times more dense (heavy) also near impossible to pump without special pumps.( i believe) i think that more or less depends on viscosity, but density probably plays a role in that too. im not overly knowledgeable on fluid dynamics
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post #48 of 115
Quote:
Originally Posted by Fieldsweeper View Post

So why not use a diamond heat-sink, with diamond (hollow) tubing pumping liquid Hg.

+1 on the diamond heat-sink. Saw a documentary where they demonstrated that a thin film diamond plate conducted heat so well it could cut through ice using only the heat in your hand.... Insane stuff

But for transfer fluid, water. The only liquids that do well in terms of heat capacity is water and ammonia. Ammonia more as a refrigerant as it uses phase change in the cooling process(also the R-xxx refrigerants). The heat capacity is the measure of how much energy is required to increase the temperature of 1 gram material by 1 degree Kelvin. So even if you have a high heat transfer metalic fluid, it would take less energy to heat it up. The total heat capacity of the same loop using water would still be higher. The only practical way to overcome this is to use a lot more Hg, bigger res, bigger rads, longer loop.

Volumetric heat capacity of Mercury is lower than water (1.888 vs 4.18)

http://en.wikipedia.org/wiki/Heat_capacity

-experience -> engineering thermodynamics.
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post #49 of 115
Well if you want to use molten metal then Lead is always an option.

http://en.wikipedia.org/wiki/Lead-cooled_fast_reactor

A bit more complicated but it is plausible.
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post #50 of 115
You would not gain much from exotic materials in the cooling loop because water is good enough at moving heat.
Having a loop that is better at transferring heat to the radiator will not gain a lot, because the important part is to get the heat out of the loop.
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