Originally Posted by
BeastComputers
Okay,
It seems that the principal behind water cooling is not that easy to understand. I'm not surprised as there is more wrong information out there than there is genuine.
I'm going to try my best to explain to you how it works.
I don't want this to sound too harsh, I'm not having a go. It's just obvious that you perhaps have been mislead in terms of how water-cooling works. I mentioned before that there was recently a whole guide published and some of the points made us cringe.
As I said - I don't blame you for being mislead. Water-cooling has become far to commercial and most of this knowledge has been lost in translation; It's too easy these days.
We are going back to basics here guys, so hold on, read up and if you don't understand just ask.
Myth #1 loop order matters.
The order of the components in a water-cooling loop does not matter, this will become more clear in my next point. I've always considered it good practice to have the CPU block being fed directly by the pump. But I tend to go for the shortest tubing lengths and the easiest filling and bleeding set up. some systems can be made harder to fill than they really have to.
Myth #2 - Water temperature changes as it goes around the loop.
This is perhaps the hardest one to get your head around.
It seems perfectly logical to presume that the water goes through one block; heats up then goes through another block; heats up even more. goes through another block and heats up even more. It then goes through the radiator and cools down, providing the 'first' block with cool water
This has to be one of the most misunderstood thing about water-cooling loops. the above statement is so far from the truth that once you realise how it works the penny will drop.
you have to remember that the water does not stop moving. the water-flow is continuous and does not heat up and cool down. it stays at a constant. you have to keep the word 'constant' in your head all of the time. heat is constantly being dumped into the water from the components and heat is constantly being dissipated into the air by the radiator. the water constantly circulates the loop. everything is happening constantly.
The water temperature from the inlet to the outlet of a radiator is hardly measurable. this difference does increase as the flow rate decreases. but then the opposite is true for the water-blocks. They are adding head as 'quickly' as the radiator is taking it away. Because of the considerably high flow in a cooling loop the temperature differences throughout the loop from one 'end' to another are less than .5 degrees
What I am saying is the water moves too fast for there to be any temperature difference,, therefore it does not matter if the graphics cards are being fed before the CPU, or vice versa
If you find that hard to understand, use this analogy.
Turn both of the taps on. stick your hand under the hot tap for 10 seconds, then stick it under the cold tap fro 10 seconds, keep repeating this. the temperature of your hand will fluctuate greatly, but slowly.
Speed it up a little only put your hand under each tap for 5 seconds at a time. Your hands temperature will still fluctuate faster, but not as great a difference.
Speed it up again; one second under the hot tap then one second under the cool tap and so on and so forth. You can see how this fluctuation in temperature almost evens out to the point where the two taps feel the same temperature.
This is how water cooling works. the water flows fast. it does not spend enough time under the heat load for its temperature to fluctuate so dramatically
Please note, your hand does not spend 'less time' under the hot tap when you are changing it every second. It spends exactly the same amount of time as the first example ( 10 seconds) because your hand is moving 10 times as quick; I hope that makes sense.
With this in mind Your hand represents the collant in a system. the hot and cold water taps represent the water-blocks and radiators. the speed at which your hand moves represents the flow rate.
we don't want to dwell on this point, but we have tested (with varius tubing) it and we don't feel comfortable using these fittings in a customers system. I would consider it in my own system where I can keep an eye on it and monitor it all of the time but our systems are expected to last years. I'll have to be quite stubborn here and say that we still do not consider using compression fittings.
No worries, just trying to make the point that there is tons going on that is not featured int he photo shoot. I guess it was deemed as not essential to photograph it.
They are indeed a tight squeeze. Using detergent, you may find that it can come off as easily as it went on. therefore we only use hot water to fit them - It's hard but safe. good quality zip ties are used for added security, but they are hardly needed.
I hope this helps clear some more things up guys. I can go through some more stuff if needed. We really are enthusiasts you know, We just get to do our beloved hobby for a job and get to build things we could only ever dream of owning. It really is a labour of love for us, and as hopefully by now it has become apparent that a lot of thought has gone in to our latest rig.