Would This Work?

[eric54]

Possible heatsink cooling design for CPU/gpu anything really.

Liquid metal in an enclosed loop with CO2 gas filling the void would work. As heat caused the metal to expand the CO2 would compress, compressing the CO2 would cool the metal in proportion to the heat output. Caculating the size of the copper coil you need would need to be ironed out. As welll, how much co2 can you fit inside of the coil? Use some math to get the best proportion of gas to liquid metal (mercury, even a liquid could work). Surround the coil with copper fins and follow that with a fan to blow away condensation buildup and aid in cooling. Use a smaller fan or a big one, whatever you want.

This would be a great solution for small form factor pc's like shuttle and maybe even laptops. The cooling is purely self contained and provides a feedback that proportions itself based on the heat produced.

Quick question, would this work? If, not why? if so, what metal would you recommend?

 

[HotFoot]

The CO2 gas would heat as it's compressed by the liquid metal (presumably mercury), so it would only cause increased temperatures while under compression. As the pressure is released, however, the expanding gas will absorb heat, and can fall below room temperature. Unfortunately, this means the CO2 expansion/contraction effect will only heat while the CPU temp is increasing, and cool while the CPU temp is already falling. I don't think that is desirable.

I would be interested to see a liquid cooling system using mercury as the fluid, since this material may be very effective for both convective heat transfer and conductive heat transfer. However, the risks associated with spilling the toxic substance more than likely rule out any commercialisation of a mercury cooling product, even if compelling cooling performance could be achieved.

 

[lewbaseball07]

where the hell would u buy liquid mercury???

 

[lewbaseball07]

i think running your loop through an ice cooler would be your best bet for gooooooooooooood cooling

 

[eRazor]

where the hell would u buy liquid mercury???

Mercury is available in 1 litre bottles in chemist supply shops in the UK. I would presume that any elementary or high school science teacher should have access to it as well.

And, just to be facetious, I'm going to say that no matter where you buy pure mercury, it's going to be liquid

 

[caamsa]

I have no idea but it sounds cool.

 

[everett]

Not just anyone can go buy the stuff, and i do not care where in the world you live. Anyone ever hear of the EPA? They might want to take an long class, and alot of money to get H.A.Z.W.O.P.E.R certified.

 

[Grizely1]

Probably not a good idea, seeing as how mercury is quite poisonous.

 

[truromeo4juliet]

erm... I'm not a chemist, or a physicist... but I think HotFoot is correct... my thought, if I remember anything from sleeping through high school:

(cooling = compression), (compression =! cooling)

in otherwords, gasses are compressed by supercooling them, slowing their molecular structures down into liquid state, or even further into a solid state, during which the air volume between molecules is automatically condensed and packed into a tighter area because the molecules are less energetic, and therefore not bouncing as far away from each other as when they're in their natural "gaseous" state...

I would think that compression would actually lead to increased heat, because the energy of the molecules would remain the same, and they would bounce off one-another at an increased rate (due to smaller air-space), increasing friction leading to more heat...

CO2, when cooled, turns into liquid-CO2, then into dry ice, for example... the liquid-CO2 stage only lasts for a split second, as it's vaporization point (in degrees fahrenheit) is only a few degrees above the solidification points, leaving a few degrees fahrenheit for the liquid state... very hard to have exact environmental temperature to contrain liquid-CO2

Nitrogen, when cooled and compressed, turns into Liquid-Nitrogen... Liquid nitrogen is generally measured in degrees Kelvin, the measurement of heat energy in a substance... Kelvin is absolute heat energy, where 0K is no heat energy at all (0K = −273.15°C, or -459.7°F) Nitrogen is a liquid at 63K and 77.2K (-346°F and -320.44°F, -210°C and -195.8°C)... below 63K, nitrogen is solid (i'd LOVE to see that)... at 77.2K, nitrogen boils like water, and becomes a gas again.

basically, boyle's law supports this theory because it states that in order for the temperature and pressure in the tube to stay the same, the volume of the has to expand as the liquid metal expands... if the volume of the tube doesn't expand (or expands at a ratio slower than the volume of the liquid metal), the temperature of the gas will increase... if it expands at the same rate, the gas will remain at the same temperature, and if it expands faster, than temperature of the gas will decrease... find a tube that increases it's volume at a rate faster than the liquid inside of it, and you'll have come up with what may be a viable solution for cooling...

here's a joke based on the above theory:
Is Hell Endothermic or Exothermic?

hope this teaches you something... or makes you laugh Cheers! - Mark

 

[SP73]

where the hell would u buy liquid mercury???

lol crack open some old thermometers?

 

[aBg_rOnGak]

where the hell would u buy liquid mercury???

lol crack open some old thermometers?

:lol: :lol: :lol:
Nice one...may be i can FedEx you some...

 

[everett]

where the hell would u buy liquid mercury???

lol crack open some old thermometers?

:lol: :lol: :lol:
Nice one...may be i can FedEx you some...

:lol: And after messin around with the stuff for too long, his kid's will look like your avatar :lol: