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progbuddy
11-30-2006, 11:16 PM
I wonder if you could use liquid nitrogen in a cooling system... I happen to have some :p.
RSzetec
11-30-2006, 11:24 PM
yep you sure can http://video.google.co.uk/videoplay?docid=506873430516227655&q=overclocking
progbuddy
11-30-2006, 11:43 PM
Holy crap. Nice video. Only one thing- is there a way to keep it from evaporating while holding its cooling properties?

wOOt- new record!
RSzetec
12-01-2006, 12:05 AM
No idea how to stop it evaporating, cant really keep it under pressure as i think it needs to vent every so often
AKA_RA
12-01-2006, 12:19 AM
well, if you heat it up, its going to build pressure if its capped, it evaporates cuz its supposed to be gas at room temp. if the environment was cold enough to keep it liquid, you wouldnt need it cooling your pc :D
progbuddy
12-01-2006, 08:01 AM
I thought i had some LN at hand, but its actually ether and propane :p. It will still freeze anything it comes in contact with.

Oh, and could you make a phase changer setup for LN?
jaxspades
12-01-2006, 03:19 PM
Haha, I've been wondering about that for a while myself...

Except I was thinking more of the gas state, not the liquid state.....
which would be trickier...
progbuddy
12-01-2006, 04:55 PM
Yeah, the liquid state might not work. It has to be a certain temperature for the propane to remain a liquid (around -100) or it must be stored in a cylinder. I thought about experimenting with the gas form...
Slug Toy
12-01-2006, 06:03 PM
experimenting with gaseous propane wont get you anything. the cooling effect is the transition from liquid to gas. what you need to do is run a tank of propane through a cooling loop attached to your cpu, and have a pilot light on the outside of the case. its the same idea as propane powered fridges.

another thing you could consider is using ammonia. theres a process out there called the haber process, and it is basically an exothermic process that combines nitrogen and hydrogen to form ammonia gas. you can go in the reverse too... heat it up and ammonia decomposes into nitrogen and hydrogen. you just need a catalyst (unfortunately its usually platinum). apparently the decomposition of ammonia get really cold. ive heard of ammonia powered fridges too. im not exactly sure what temperatures are involved though. ill look into it.

<EDIT> nope, forget ammonia. i just looked it up. you need approximately 250 atmospheres of pressure, and 450-500 degrees. you'll be melting your computer with that.
progbuddy
12-01-2006, 06:35 PM
Yeah. Phase changer = about 12 amps at the least... Ill try something else... I've heard of many awesome and/or crazy ways to cool a CPU. Lasers, LN, etc. I have my own secret coolant 8)
Slug Toy
12-01-2006, 06:41 PM
dimethyl ether, or methyl ethyl ether you can actually make at home. i can make them. dimethyl ether can cool at least to -22 celsius, and methyl ethyl ether can go to at least 5 degrees above freezing.

PM me with your secret coolant. i can run some checks on it if you want.
progbuddy
12-01-2006, 06:52 PM
I have a dimethyl ether and propane mix that gets down to -100 C.
Slug Toy
12-01-2006, 06:56 PM
oh ya you were mentioning that before. that should work well. i just dont exactly know how you can go about using it except in the way i was saying. putting it in a phase change setup is risky because ethers evaporate really easily and are very flammable, and the propane doesnt help much for safety.
progbuddy
12-01-2006, 07:00 PM
oh ya you were mentioning that before. that should work well. i just dont exactly know how you can go about using it except in the way i was saying. putting it in a phase change setup is risky because ethers evaporate really easily and are very flammable, and the propane doesnt help much for safety.

Yeah, I think ill stick with a new water cooler for christmas :).