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Water Cooling Computers With A Swimming Pool

guzugi writes "This is a project I have been working for several months and been hypothesizing for much longer. The basic idea is to shortcut the need for an air conditioner when cooling multiple computers. Swimming pool water is pumped into the house and through several waterblocks to effectively cool these hot machines. This greatly reduces noise cooling requirements."

15 of 241 comments (clear)

  1. Pool water? by Eevee · · Score: 4, Insightful

    Because I always choose clorinated water to ensure the maximum corrosion in my computer's cooling system.

  2. Some practical advice... by (H)elix1 · · Score: 4, Insightful

    Watch out for condensation if your coolant (swimming pool water) is colder than room temperature! You don't need crazy temp differentials to cool a CPU. If you pull water from outside, odds are it will be colder than the air around your water block. This can cause all sorts of problems. Room temperature water is even easier to deal with than cold water. If you are just looking for quiet operation rather than crazy overclocks, you won't need the pool.

    Plan for a bit of condensation. Flip your motherboards around so if drops of water (*god forbid*) were to form, they drop away from the mainboard. Water from condensation tends to be pure enough that it won't short out your system as easy as one might think. Still... bad things can happen.

    Also, you will want some sort of anti-crap mixed into your water, or you can get all sorts of funky growth. More of an issue for closed systems than water from a swimming pool (with all the CL, etc). Be sure your piping can handle that. I've seen folks use hose that did deteriorate over time. Not pretty. A clogged 'artery' on a heat sink will kill your system dead. Non-conductive anti-crap additive is a really good idea.

    Lastly, if the water pump dies, everything else will die. Make sure you have some sort of kill switch so all your hardware shuts down if you lose water flow.

    Check out the overclockers forums out there. While you don't need the extreme lower temperatures, a big radiator and large low RPM fan in another room make for a very quite office environment.

  3. Re:Chemistry? by jbengt · · Score: 2, Insightful

    Well, according to TFA, he already corroded the aluminum blocks and replaced them with acrylic. He doesn't seem to have learned, though, as he's talking about submerging his houses A/C condenser coil (typically copper tubes, aluminum fins). Guess it'll take a little longer for him to find out about other incompatibilities.

  4. Heat Exchanger by prothid · · Score: 2, Insightful

    This is a neat idea, but as pointed out in other posts, there are some serious drawbacks as far as corrosion and other contaminants in the water. Have you considered using a heat exchanger? This would isolate you from pool water and you could fill the lines with clean water to avoid all of these issues.

  5. Re:wrong pump by fractilian · · Score: 3, Insightful

    Depending on temperature conditions the heat would build up in the box also, cutting the lifespan of the motor down. Since he has a pool to begin with I would assume he lives in a area with hot summer temperatures. Just my two cents(probably not even worth that).

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  6. Two Words by profplump · · Score: 3, Insightful

    Heat Exchanger
    Just because you're using the pool as a heat sink doesn't mean you have to run the actual pool water through your computer.

    Now, this guy doesn't seem to have caught on to that, but it's not a totally implausible solution. Keeping the heat in water, even through an exchanger, is still more efficient than trying to dump the heat directly to the air, at least until you build a radiator the size of your pool.

  7. He needs a heat exchanger... by Ellis+D.+Tripp · · Score: 4, Insightful

    To avoid the problems with chlorinated pool water corroding the waterblocks and other hardware, he really needs to install a water-to-water heat exchanger in the system. Pool water would run in the primary side of the exchanger, with distilled water or glycol on the computer side. A second circulating pump would also be needed.

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  8. Accidents? by mano_k · · Score: 2, Insightful

    That reminds me of a friend who was quite proud of his fanless water cooling solution which worked with several litres of water as heat dump in a container sitting under his desk.

    When one of the main pipes got loose somehow, it not only fried some hardware, but majorely pissed of his landlord...

  9. Urgh! Very bad design! by gweihir · · Score: 4, Insightful
    Pumping contaminated swimming pool water directly into sensitive cooling equipment is plain incompetent. Sorry about this hard statement.

    Problems:
    • Corrosion. Unless you want to dump some few thousand liters of anti-corrosion fluid into your pool? And what do you use to clear you pool? Clorine? Ozone? Both a very bad idea in a cooling circuit....
    • Clogging: Even with filters, something will be getting through may well cause problems up to completely ineffectiveness
    • Air buildup. Air will disolve in the water outside and may accumulate in the computers.


    The right way to do this is with a heat exchanger that is robust on the swimming-pool side and has conditioned water in a closed circuit on the other side. Requires two pumps, but has a change of working longer than a few (if that) months.
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  10. Re:Fish Like This Idea As Well by Anonymous Coward · · Score: 2, Insightful

    REally? because I bet you could not raise the temperature to more than 85 deg if the ambient is 70 deg in a 6 gallon tank with your computer.

    6 gallons of water is a LOT of thermal mass, putting in into a cooling tank with an open top is a really big thermal release.

    Althoguh most of you here know incredibly litte about physics and chemistry so it's no suprise there.

    Your "uber PC" could be easily coold with probably 3 gallons of water in a open tank as the only cooling vessel. evaporation is far more efficient of a cooling system than anything you can buy... Yes even the uber watercooling systems for sale SUCK compared to the 10X more efficient evaporation systems.

    Which is why they have been in use for hundreds of years. News for Nerds, stuff from ancient times.

  11. Re:heated pool by Anonymous Coward · · Score: 1, Insightful

    No it's not like that AT ALL. I'd much rather climb a mountain actually - you can gain a lot from it (read what some of the folks who climbed the everest a few times and such have to say about it). Whereas installing piping that'll likely ruin my computers or house, costing lots of money (and wasting time) in the process just doesn't seem to benefit me in any way, shape or form.

    Yes, one has to do something with their time. I chose to spend most of my free time with my kids and wife (yes, I know this is /. and no I ain't new here). Going visit my relatives. Going on trips (long and short - went to a museum just today). Watch some good movies with the wife or in family. Playing guitar. Sometimes I like to volunteer for some stuff (help others). You name it!

    But wasting my time with this thing? No way. Life's too short to waste time on that.

  12. Re:noise cooling requirements? by S.O.B. · · Score: 2, Insightful

    Instead of "funny" I would have modded this as insightful.

    Well said.

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  13. Re:heated pool by doti · · Score: 2, Insightful

    No it's not like that AT ALL. Not for you, but maybe for him.
    You like climbing mountains, the other guy may not find it interesting at all.
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  14. i am in the other camp by mapkinase · · Score: 3, Insightful

    put your CPU into a separate room.

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  15. Re:You all are confused. by drxenos · · Score: 3, Insightful

    What I think you guys are confused about is what they put into pools. The chlorine of choice nowadays is calcium hypochlorite

    No, I'm not. I've owned a pool for years. The most commonly used form of chlorine is Trichloro-S-Triazinetrione (or Trichloroisocyanuric acid or simply, trichlor). Calcium hypochlorite breaks down very quickly in sun light (uv light) and requires the use of a stablizer (usually cyanuric acid). Trichlor already contains a stablizer, making it much more economical to use.

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