Considering Watercooling Your PC? 306
An anonymous reader writes "Thinking of taking the plunge into water cooling your PC? These guys have rounded up three systems ranging from cheap and cheerful, to stylish and pricey."
You knew the job was dangerous when you took it, Fred. -- Superchicken
Re:Why water? (Score:5, Informative)
Water has excellent heat transfer properties, (better than the refrigrants in your fridge), is easy to handle, unlike some of the better heat transfer fluids such as liquid metals, and is non toxic.
If you want to immerse your computer, Flourinert has been around forever, though now probably banned.
suggestion (Score:5, Informative)
Other than that I never had any problems. I don't use it anymore because it's too heavy to carry around all of the time.
Server Error in '/' Application. (Score:1, Informative)
Re:Why water? (Score:3, Informative)
Re:watercooling (Score:1, Informative)
Re:Come to think of it (Score:4, Informative)
You would probably be better off..
the heat transfer equation H=h*a*(delta T)
H=heat
h=heat transfer coefficient
a=surface area available for cooling
delta T=diff between temperature of device to be cooled and surrounding cooling fluid
shows that the easiest way to cool something is to reduce the temperature of the fluid that cools it..
If you lower the air temp in your computer case by 10c, the processer temp drops by 10c, assuming the fans all stay at the same speed.
Increasing "a" is limited by fin efficiency (which is what these water cooling systems are trying to get around, but a sealed evaporator/condenser would be smaller and more efficient, there is a metric buttload of patents now on sealed passive boilers/condensers), and as air speed increases, "h" rises less and less in proportion)
If you want more info, look at the free download of the heat transfer textbook I list in my journal.
Comment removed (Score:4, Informative)
Be careful (Score:5, Informative)
Re:cheerful? (Score:5, Informative)
Re:I'm past thinking about water-cooling (Score:5, Informative)
Re:Liquid metal (Score:1, Informative)
Noo! (Score:4, Informative)
The EER rating on air conditioners (a common heat pump) tell you the ratio of heat moved to power expended to move it. The units of EER are messed up though, it is BTU/HOUR divided by Watts, multiplied by some factor of 10.
Re:Liquid metal (Score:3, Informative)
First of all unless you're using some seriously exotic components it's going to be solid at the temps you'd deal with in an average compouter (15-75c).
Secondly the materials needed to contain your liquid metal aren't cheap.
Thirdly it makes inspection for any potential flaws a real pain in the ass.
Fourthly you have to consider the viscosity of liquid metals vs. water or other coolants. The amount of energy you have to use to move them is going to be substantially higher.
Fifthly, the conductivity of most liquid metals vs. water (even water with electrolytes) means that most leaks are going to = dead computer.
Oh yeah. . .also. . .I totally forgot about toxicity issues, reactivity (sodium and potassium as you've selected would be really fun to have leak out of your computer and hit, say, a patch of wet floor). . .
Re:watercooling (Score:5, Informative)
These systems must have UL approval right? If so, I don't think your insurance company would be able to say jack if you didn't just grossly mis-install it. But, since it involves water + electronics, I wonder about requirements of a GFCI circuit.
Re:Why water? (Score:4, Informative)
There is a 12V Vapochill system that requires only 6.6A, and it is quite effective at cooling even the P4 Prescott (not nearly as effective as the AC versions of the same product, though).
Re:Why water? (Score:4, Informative)
A sealed chamber with only water and water vapor in it (all air and other non-condensible gasses have been removed) will boil water at the hot end and recondense it at the cold end, at any temp above freezing for the water.
If the chamber is a vertical tube with the water and the heat source at the bottom, and fins and cooling air at the top end, the vapor from the hot end will recondense at the top cold end and run back down. (It's really a heat pipe without the porous media to move the condesed fluid back to the hot side.)
Koolance Watercool Case Running 3+ years now (Score:5, Informative)
Slashdotted Article - Page 1 Content (Score:2, Informative)
Despite a rather slow and shaky start, the water cooling revolution is well and truly under way. If the falling component prices aren't testament enough to this fact, the sheer number of kits being touted by a plethora of vendors surely is.
Nobody has ever doubted the advantages of water cooling as compared to air. Water is some twenty five times more efficient than air at conducting heat, which makes it an obvious choice for cooling all manner of hot running computer components. Unfortunately it also comes with several disadvantages too.
Perhaps the biggest hurdle water cooling has had to overcome is the natural fear in all of us that comes from pumping a fluid around the insides of an expensive, electrically powered computer. Common sense tells us we just shouldn't be doing it. Then there are the other dissuading factors such as high cost, tricky installation, bulk, weight, reliability and aesthetics - all of which have conspired to make water-cooling a fringe activity enjoyed by the elite and the brave.
However, things are changing. Water cooling is getting cheaper, safer, increasingly compact and more aesthetically pleasing with every passing day. The whole premise of liquid cooling your PC is now more viable than ever before, and with the trend for ever-increasing cooling requirements showing no signs of abating, it might be a case of when rather than if you make the switch to the wet stuff.
To help you make the plunge, we've decided to take a closer look at three different approaches to water-cooling, each theoretically suited to a different level of experience. Whether you're a LAN gamer who demands ease of transportation, an overclocker who needs top-notch performance, or even a case modder who values good looks as highly as good performance, there's something here for everyone.
Before we get stuck in, let's introduce the three kits on test: Asetek's WaterChill KT03A-L30, Eastar's Cool River Deluxe Version, and Koolance's Exos-Al.
--= I have the rest of the article copied if anyone wants me to post the rest =--
Re:Why water? (Score:1, Informative)
Actually, it's still quite legal, albeit very expensive. We buy buckets of the stuff for our MRI scans - MRI detects hydrogen, and since Fluorinert has none, it's a perfect background substance when scanning tissue samples.
Didn't even know you computer geeks used it for cooling/cleaning 'til I started reading slashdot.
Re:watercooling (Score:1, Informative)
$250 all-in-one introductory kit at Frys (Score:5, Informative)
It's basically a 2.5' tall heatsink/radiator with a submerged pump. It includes a waterblock for your processor (Intel and AMD) and all the tubing/hardware you need.
You lose the ability to easily bleed the thing, although clamping off hoses and pouring nearly 3 liters of water out the top of a Reserator doesn't really seem all that troublesome to me.
Bottom line -- he dropped his idle temps by 20C and his load temps by a similar amount. This was a few weeks ago when it was slightly warmer here in Georgia. He now idles (running a P4 Prescott) at about 27C. It's pretty amazing.
For more information, see here:
http://www.hardforum.com/showthread.php?t=783557 [hardforum.com]
IronChefMorimoto
Re:Why water? (Score:2, Informative)
Re:Air conditioning in computer room instead (Score:3, Informative)
Go learn some physics
If you're interested in unbiased water / peltiers (Score:3, Informative)
http://www.surfbaud.co.uk/news.php
which details experiments with peltiers and water cooling.
For those who can't be bother it boils down to this.
1/ water cooling is OK if done properly, but all the commercial "home" watercooling products are absolute shite
2/ peltiers work, but add huge heat loads to the system overall, and should never be directly interfaced to silicon.
Hopefully in the next few weeks (having just bought a vacuum pump) I can get around to playing with large scale home made heat pipes and report on those.
HTH etc.
Re:watercooling (Score:3, Informative)
I've done similar to an old 486-SX board. Except first, I submerged it in water-free antifreeze. It was an experiment to see if the board could run while submerged in glycol. Answer: No.
We pulled the board out of the tub, tossed it in the sink and sprayed it off. Took a blowdrier to it for 10 or 15 minutes, put it back in the case, and it fired right up.
And it was shiny-shiny after the glycol treatment :-)
Re:Air conditioning in computer room instead (Score:2, Informative)
That is true, iff you are running a closed loop water system with a typical radiator as the water to air heat exchanger.
Water will cool below ambient if you do an evaporative cooling system. See "cooling tower".
sdb
Re:I was considering water cooling, but.... (Score:3, Informative)
I disagree.
I run a watercooled system, and my homemade case has mesh sides which do nothing to stop the noise. From my personal experience (as opposed to speculation):
* My Ehiem pump is virtually silent (seriously)
* The 2 x 120mm AC fans are quite quiet, and have a low frequency wooshing sound which is gentle on the ears.
* The cooling system is quieter than the HDD
* The whole system is quieter than the 60mm stock fan on my wife's PC.