VideoJunky
Tender vittles  Posts: 4 Registered: 6/16/2005 Offline
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6/16/2005 at 17:04 |
I've just gotten into cooling methods for computers and recently read about liquid metal cooling for processors. Does anybody know anything more on this topic or if its even better than water cooling.
Let me know what ya think
[Edited on 16/6/2005 by VideoJunky]
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autoshoes
SIR BABYHEAD  Posts: 65 Registered: 6/24/2002 Offline
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6/16/2005 at 18:25 |
nothing has as much specific heat than water.
if you doubt me, i shall reference you to the all knowing and infalable web:
http://hyperphysics.phy-astr.gsu.edu/hbase/thermo/spht.html
quoteth the article:
The specific heat of water is 1 calorie/gram °C = 4.186 joule/gram °C which is higher than any other common substance. As a result, water plays a very important role in temperature regulation. The specific heat per gram for water is much higher than that for a metal, as described in the water-metal example. For most purposes, it is more meaningful to compare the molar specific heats of substances.
[Edited on 16/6/2005 by autoshoes]
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nocal
It's insane, this guy's taint   SSHOLEPosts: 811 Registered: 8/25/2004 Offline
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6/16/2005 at 21:43 |
WELL. I guess that's the end of this thread. |
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dinozoa
SENATOR BABYHEAD Posts: 319 Registered: 7/18/2004 Offline
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6/16/2005 at 21:48 |
this is straight up not true. plenty of things have a higher specific heat than water. plenty of common things, although I have a hard time remember them right now because it's easier to remember substances with low conductivity than it is to remember substances with high specific heat.
the important things for coolant in general are
1. has to have high conductivity, to pull heat from your computer/car/whatever very quickly and to deliver heat to the surrounding environment very quickly. this is actually more important than heat capacity, as you can increase the heat capacity of your coolant just by increasing the volume or mass of coolant you expose to your heat source
2. should be a liquid or gas, because it's damn hard to move solids quickly through a circuit. if you want to use a solid, then you have to have a solid that conducts heat quickly, pack the solid around the heat source, and have an extremely high surface area to volume ratio, so the solid can conduct heat to a higher volume of air. Apple laptops don't have fans, they have metal casings with high surface area to volume ratios
that said, there's no reason why liquid metal can't be an effective coolant, since most metals have a much higher conductivity than water. I know nothing about cooling computers using metal coolants, especially liquid metal coolants, but I say this to you - all metals excepting mercury are solids at room temperature, so your computers going to have to be hot enough to keep your metal melted, at which point the circuitry in computer is probably also melted. unless you're talking about some metal that I've never heard of. |
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qwerty
DARTH MENSES  Posts: 628 Registered: 9/8/2004 Offline
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6/17/2005 at 04:44 |
Learn More About Cooling and Overclocking
I think the info you're look for is:
Blocks of thermally conductive metal (and thermally capacitive metal) machined to have maximum surface area, while being light, and small, the more surface area allows more heat to leave the metal and be transferred to air which is being moved very quickly by a fan
For e.g. thermal capacities of 5 (silver has been used in a HSF before!) common HSF elements
Aluminum
Heat Capacity 897 J/kg-K
Thermal Conductivity 237 W/m-K
Copper
Heat Capacity 385 J/kg-K
Thermal Conductivity 401 W/m-K
Oxygen (air will be different though, but not by a large amount)
Heat Capacity (O2) 918 J/kg-K
Thermal Conductivity .0024 W/m-k
Water
Heat Capacity 4178 J/kg-K
and Thermal Conductivity .320 W/m-K
Silver
Heat Capacity 235 J/kg-K
Thermal Conductivity 429 W/m-K
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qwerty
DARTH MENSES Posts: 628 Registered: 9/8/2004 Offline
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6/17/2005 at 04:48 |
Also when making a watercooling system you'll find that when you get to sub 0 temps your pump will shutdown. Most people use straight coollant and when designing your system I hope you remeber that water can rust and destroy your mounting blocks so it is a good idea to add a chemical mix to stop this from happening.
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