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homemade sub ambient water loop

post #1 of 10
Thread Starter 
so i have been experimenting lately. evaporation cooling (bong cooler) was a fail due to high noise and low yield. so i tried water chilling. works but too much involved with extra tank, coils, blah blah blah

so i bought a used dehumidifier. most tweekers would make it into a chiller but i made it into a ac unit more or less. i took the unit case off and seperated the evap and cond coil. i re attached them 3 inches apart. then dropped my dual radiators between and presto. i know get a steady water temp of 12-15c and my ambient is 24. no hot air from this since cold air mixes with hot. no dew, condensation. just water pump, res, rad, humidifier. idle temps on my i7 4770k are 15 and load average is 25-30. my total cost are

water block-140
rad x2- 35 each
pump-75
humidifier-20
labor-one hour

if anyone is interested i willl attach pics but still in experimental stage so its atrocious
post #2 of 10
Would like to see some pics. smile.gif
post #3 of 10
Thread Starter 





i already sealed up the case but all humidifiers house the hot and cold together to remove the heat. so just seperate them and place rad or even a water coil in between then seal all the edges as to not loose static pressure. mine is noisy at the moment from vibration. im going to remove all casing and make my own insulated housing and i will document the process. im using the pc now and maintaining core temp of 12 and water temp of 13
post #4 of 10
Thread Starter 
ok so day two after watching for condensation carefully the loop maintains 8-10C at idle and 12-14 at full load(prime95) my current rig and bios are

i7 4770k (4.5)
z87-k(ok board surprisingly)
apache waterblock
swift tech pump
x2 swift tech rads

im having issues with oc with this chip and have to run 1.35 to be remotely stable. all that said very impressed with a humidifiers results. im gonna buy another used one and try to video the process. much cheaper than a chiller(although i still plan to buy one soon)
post #5 of 10
thumb.gif
post #6 of 10
Nice setup! You should keep tweaking it and maybe mod it into a case. Couple things come to mind though...

If you are running a chiller you should remove the radiators. You have 12-15c water moving into rads that have 24* air blowing over them, warming up your loop smile.gif.

Also be careful trusting those temps and be sure to calculate dew point. ~10c is around where condensation dangers start happening at a normal ambient and humidity level. For example my ambient is currently 24c, and my humidity is 36%. This makes my dew point 9c. If its hotter or more humid where you are, that will push the dew point up and you may get condensation at 12-13c. Onboard temp sensors are notoriously inaccurate and 1-2* discrepancy can be the difference between running fine and frying a board due to condensation.

FYI, due to the high heat density of IB and Haswell chips there is a large delta between IHS temps and core temps - a 15c coolant temp will usually be at least 45c core temp at load.
Behemoth
(25 items)
 
  
CPUMotherboardGraphicsGraphics
Intel i7 4790K "Relidded" @ 5ghz <50c Asus Sabertooth Z97 MK1 Custom WC'd 7970 3GB @ 1100/1500 stock volts Custom WC'd 7970 3GB @ 1100/1500 stock volts 
RAMHard DriveCoolingCooling
2X4GB Patriot Viper Extreme 1TB Velociraptor 10k RPM w/ 64MB Cache Two Arqtik TEC Chillers in Series Archimedes TEC block w/TN660 TEC 
CoolingCoolingCoolingCooling
Two Ported/tapped MCP655 Pumps 2x Black Ice GTX 480 Gen2 Rads DD dual drive bay Res with LCD water temp monit... GPU Loop: Modded Enzotech Sapphire CPU blocks, ... 
CoolingOSOSMonitor
36x Globe 120mm 80cfm server fans Win 10 Pro Mint 15(KDE) 4K 28" Samsung U590D 
KeyboardPowerCaseMouse
Logitech G710+ Mechanical CM Silent Power M 1000watt Main, OCZ Z850W Slave Custom Mountain Mods Extended-Extended Ascension Logitech G502 Proteus 
Mouse PadAudioAudioAudio
Homemade 16ga 304 Stainless pad, Neoprene backed Aune T1 DAC Various Tubes: Mostly switching from 60's GE "S... AKG K7XX Headphones 
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Behemoth
(25 items)
 
  
CPUMotherboardGraphicsGraphics
Intel i7 4790K "Relidded" @ 5ghz <50c Asus Sabertooth Z97 MK1 Custom WC'd 7970 3GB @ 1100/1500 stock volts Custom WC'd 7970 3GB @ 1100/1500 stock volts 
RAMHard DriveCoolingCooling
2X4GB Patriot Viper Extreme 1TB Velociraptor 10k RPM w/ 64MB Cache Two Arqtik TEC Chillers in Series Archimedes TEC block w/TN660 TEC 
CoolingCoolingCoolingCooling
Two Ported/tapped MCP655 Pumps 2x Black Ice GTX 480 Gen2 Rads DD dual drive bay Res with LCD water temp monit... GPU Loop: Modded Enzotech Sapphire CPU blocks, ... 
CoolingOSOSMonitor
36x Globe 120mm 80cfm server fans Win 10 Pro Mint 15(KDE) 4K 28" Samsung U590D 
KeyboardPowerCaseMouse
Logitech G710+ Mechanical CM Silent Power M 1000watt Main, OCZ Z850W Slave Custom Mountain Mods Extended-Extended Ascension Logitech G502 Proteus 
Mouse PadAudioAudioAudio
Homemade 16ga 304 Stainless pad, Neoprene backed Aune T1 DAC Various Tubes: Mostly switching from 60's GE "S... AKG K7XX Headphones 
  hide details  
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post #7 of 10
Thread Starter 
thanks appreciate the info. the rads are placed into the dehumidifier tho so no warm air. only the air from the cold evaporator are hitting the rads so the water isnt getting heated up. the loop stays around 9c at idle and i experimented to find my actual dew point and with the dehumidifier running the water has to be below 5c so its safe for the moment. now summer may be a different story. now if my oc would be stable i would be happy with this. at the moment this is overkill since im running stock cores




update-im a hvac guy and im in the process of placing this in a packaged unit more like a actual aquarium chiller. if those goes well i may make and sell some of these for $200-300 but keep in mind this is a 1/3hp chiller. with no load and antifreeze i have hit -10c using insulated lines and a cooler(water temps didnt try on pc lol)

ps only try this with newer dehumidifiers. older ones use a copper or aluminum tubing as the coil and not a actual coil with fins. this wouldnt work as well since air cannot be directed.
post #8 of 10
now summer may be a different story. now if my oc would be stable i would be happy with this. at the moment this is overkill since im running stock corestc1yGG
post #9 of 10
Can i suggest you look at volenti coolers too? They're the much more efficient version of a bong cooler. I made one, but managed to break it by buying multiple really crappy pumps
post #10 of 10
Thread Starter 
ive dropped the dehumidifier idea for the moment. but i have ordered a lazer chiller for super cheap on ebay. basically a compact chiller that should perform great. if not it will go to myh aquarium lol
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