What is phase change - Overclock.net

nightfalls · 11-27-08

could some one explain what phase change is and what is does?

gooddog · 11-27-08

Quote:

Phase-change cooling is an extremely effective way to cool the processor. A vapor compression phase-change cooler is a unit which usually sits underneath the PC, with a tube leading to the processor. Inside the unit is a compressor, the same type that cools a freezer. The compressor compresses a gas (or mixture of gases) which condenses it into a liquid. Then, the liquid is pumped up to the processor, where it passes through an expansion device, this can be from a simple capillary tube to a more elaborate thermal expansion valve. The liquid evaporates (changing phase), absorbing the heat from the processor as it draws extra energy from its environment to accommodate this change (see latent heat). The evaporation can produce temperatures reaching around −15 to -150 degrees Celsius.

http://en.wikipedia.org/wiki/Compute...change_cooling

wannabe_OC · 11-27-08

Some reading for ya...

Spart · 11-27-08

Essentially you use phase transition cooling to achieve sub ambient temps. You pretty much cool your CPU/GPU's with air conditioner parts.

Here's the wiki for what Phase Change is.

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

This Bit-Tech forum post sums it up perfectly.

http://forums.bit-tech.net/showthread.php?t=98378

DuckieHo · 11-27-08

It is the same process with air conditioners and refrigeration work upon. Use compress liquid which changes to a gas as it absorbs heat.

d3str0y3r0fn00bs · 11-27-08

Quote:

Originally Posted by DuckieHo

It is the same process with air conditioners and refrigeration work upon. Use compress liquid which changes to a gas as it absorbs heat.

uhh not quite, but that is the general thought behind it. #1 hot compressed gas comes out of the compressor and goes into the condenser. because of the extreme pressure(200psi+) it is able to condense at much higher temps. #2 the condenser turns the hot gas into some low temp liquid. #3 the liquid travels to the evaporator where it evaporates back into a gas. when evaporation happens it takes heat with it. that’s what cooling is. the moving/removal of heat. also remember heat cannot be destroyed only moved. any more questions feel free to post on the phase forms or send a message to me, ill get back eventually lol

hercules71185 · 11-30-08

thanks the post helped me, so phase change is basically the idea behind freon. :-D

Ruredee · 11-30-08

Quote:

Originally Posted by DuckieHo

It is the same process with air conditioners and refrigeration work upon. Use compress liquid which changes to a gas as it absorbs heat.

Cant compress liquid.

OT: Its basically air conditioning for you cpu.

MrDeodorant · 12-05-08

I'm pretty sure you can compress liquids. It's true that water doesn't compress much, but I don't think liquids being uncompressable is true as a general rule.

DuckieHo · 12-05-08

Quote:

Originally Posted by Ruredee

Cant compress liquid.

OT: Its basically air conditioning for you cpu.

Ahhh... yes, you can.

But in my statement, I should have said "Use high-pressure, low-temperature liquid which changes to a gas as it absorbs heat." to be more clear.

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What is phase change

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