water cooling solution

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water cooling solution

Postby nathanpiercy » Thu Apr 20, 2006 5:03 pm

is there a special solution i need to put in my water cooler? i'm just about out of solution that came with my cooler master AQUAGATE - ALC-U01, and i want to know if i can make something myself, or if there is some well known cooling liguids i could buy from a local store??
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Postby R for Republican » Thu Apr 20, 2006 5:16 pm

this is a quote from another member here

Webster :P wrote:Excellent article. I think it would be good to add some more info on how water-cooling works, and why it works better than air-cooling.

A real plus of most water systems is that they take the heat outside the case leaving the environment inside the case much cooler. However the main benefit is water has a much better cooling capacity than air allowing one to achieve lower CPU/GPU core temperatures.

Why is this? When compared to air water is,

About 900 times denser
About 22 times better at conducting heat.
Specific heat capacity is 4 times higher (takes 4 times as much energy to raise the same mass by one degree)

The better conductivity is a real benefit; it means you can have the same heat transfer with a much smaller surface area. Air-cooled heatsinks get ever larger too keep up with the increasing heat produced by CPUs. Returns are diminishing with increased size because the thermal conductivity of Aluminium/Copper is far from perfect itself. The further the distance is between the tip of the fins and the core of the heatsink the larger the temperature drop is between them and the less efficient the heatsink works.

Then there is the density and specific heat capacity. The same amount of energy is required to heat 1L of water and 3600L of air by one degree. A typical 80mm fan claims to push 1000 litres a minute (35CFM), a water pump 20 litres a minute. This may be a 20th of the volume, but when you factor in the 3600 you find that a water system is pushing 180 times the cooling power of an 80mm fan 8O

This is all very subjective but I hope it is of some use.

Want more detail?

Dry air @ 40 � C
Density 1.128 kg/dm 3
Thermal conductivity 0.0271 W/(K m)
Specific heat capacity 1010 J/(Kg K)

Pure water @ 25 � C
Density 997.05 kg/dm 3
Thermal conductivity 0.610 W/(K m)
Specific heat capacity 4186 J/(Kg K)


i dont know if it will help...
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thanks

Postby nathanpiercy » Thu Apr 20, 2006 5:58 pm

thanks for the quick reply. it was nice to know the facts, but i'm really looking for answers to more specific questions like:
do i need to add any additives to the water to keep the water clean or add something that will make a better conductor of heat? so like anti corrosion additives or what not?
Abit NF7-S2
CoolerMaster Watercooler RL-HUC-E8U1
Happauge WINTV-PVR-150 w/remote
AMD Athlon XP 3000+ Barton
Radeon 9250 128mb
1GB, 2x512mb Corsair DDR400
80GB SATA150
40GB IDE
120GB SATA
500W PSU(can't remember brand)
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Postby jonnyGURU » Thu Apr 20, 2006 6:14 pm

No. Distilled water works great.

I have used Water Wetter in the past because it keeps the pump lubed.
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Postby Black Wolf » Fri Apr 21, 2006 2:45 am

I also only use distlled water with no problems.
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Postby jonnyGURU » Fri Apr 21, 2006 6:23 pm

You know what... I forgot about algea.

When you get a chance... add something to the water. But to run w/ just distilled at first isn't going to hurt anything.
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Postby jimmy-j » Sat May 13, 2006 10:10 pm

If you get Algea in your watter then you no longer have pure distilled watter due to contaminents.
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