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What is a Phase Change unit? - Page 2

post #11 of 14
Thread Starter 
Hmm.

I've heard this things have bad issues with condensation, what is the best way to stop that?
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Red Thunder
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post #12 of 14
So there's 2 ways you usually get condensation.

1. The evap get's really cold. If you don't have an airtight seal in your mount, you'll get air drawn in every time you use it, it'll freeze the moisure on the evap, and when you shut down it'll melt and drip, usually onto your graphics card if it's installed in a case.

Worse sometimes, it'll keep freezing and melting as it's used, dripping water slowly but consistently.

Got to make sure the mount and evaporator (The thing that's actually bolted to your cpu, copper block) are insulated and sealed. That's a really common one, since the evap get's so cold any mistakes or imperfections in the seal can be dangerous for moisture.

Every phase unit comes with insulation and stuff, some come with that art eraser to help seal it, some has foam tape inclued, just have to set up the mount right. There's guides for that here and there.

2. If you run a 24/7 setup then there can be times that things get cold. The motherboard especially, if you let it run idle for long periods, or if you have a really cold unit there are times when it will cool the motherboard too much even with some load.

The cooler express units come with the backplate heater, which is good for that. Heats up the backplate and motherboard just enough to stop condensation.

Even if a cooler doesn't come with a heater, you can buy them online and just add a molex connector to the wiring. Just need to make sure it's not pressing really hard against a motherboard, good idea to either stick it on the backplate foam and then add a thin layer of foam tape, or with the CE units I think it's recessed a bit into the backplate.

There's power running through the heaters so if it's pushing against a mobo and a sharp bit of it rubs through it can short out the board, potentially damaging it.

So yeah, condensation is an issue, especially if you live with high humidity in your part of the world, but it's easily controlled if you're careful and methodical about the install.


Gray
post #13 of 14
If you can remove air from the equation via insulation then you will not have condensation build up.
A lot of folks use a combination of neoprene and artist eraser not to mention dialectic grease in the socket.
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post #14 of 14
water sucks up a ton of energy when it evaporates, without actually increasing in temperature. this extra energy is simply used as the boost it needs to jump out of the pool of liquid and become airborne. water also dumps a ton of energy when it condenses, for the exact opposite reason. kind of like putting on your breaks when you are flying down the freeway, the energy is turned into heat in your break pads.

energy = heat

hope that helps, basic physics class is really essential to really understanding it.
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