Any interest in Aqua-Computer water cooling?

[Dunno]

Sighs!
Well here is my explination for those that cannot see the obvious.
I thought I might post it on [H]. Shame!
Wanto run it past you people first:

Please add to/correct this:

If a race car goes around a track at 100Km/h and spends 10 seconds on the straight/radiator what happens at 200Km/h?

He spend 5 secomds on the straight/radiator but he does it twice as often. So no matter your flow rate each water molicule spends the same amount of time in the rad, waterblock etc.

(The above needs to be credited to someone else. Dont know who?)

Flow makes a difference in 3 cases... Sorta???:

Lets say the car spend 5 seconds in the CPU waterblock S's and rises 1 deg. at 200Km/h.
At 100 he will pick up 2 deg. So when the water gets to next WB in a series loop it is hotter for low flow systems.

2:
All the inner walls in a WC loop restrict flow:
The water/air molicules sitting an a solid surface dont move.
Its called the boundry layer.
These air layers are like the layers of an onion; with each higher layer moving faster than the one underneath.
Pipe diameter reductions especially restrict flow.
Sharp edges in tube to block etc. connections cause turbulance which also slows flow (???), but is not always a bad thing:

3:
Turbulance in your CPU block can thin out the insulating boundry layer, increasing cooling efficiency. Cathar's WBs are excellent examples.


Another myth is that you should not go too high up from the pump: Go above the Max Head for the pump an flow stops! :

Remember siphoning petrol or whatever? The weight of the fluid on the longer, downward exit pipe is heavier than that in the upward piece; so it pulls water up and flow!

So in a loop, no matter how high, the water you pump up siphons/is-pulled down in the downward bit.

Pressure increases flow by overcoming the total restriction of the complete loop. Up to a point...........??? turbulance.............???

The only place where 'pure' pump head is important to computing is with Bong Cooling.

[JWFokker]

When are you going to get the Nexxos XP? That's the one I'm looking forward to. It'll go well with the Koolance Exos I'm going to buy.

As for this flow rate argument...as much as everyone drones on about flow rate being the most important aspect of cooling, it gets pretty tiring, but I grudgingly have to agree with them. Every waterblock test shows this. Just look at Phaestus' innumerable charts. But these are American waterblock designs that rely on flow rate for cooling.

It seems to me flow rate has less of an impact on waterblocks designed for 6mm tubing than it does for waterblocks designed for 3/8"-1/2" tubing. They weren't engineered for the same purpose so a direct comparison can't be made. In a 6mm system, their designs have been optimised for low flow rates, as a result of physical constraints. You can't force 2+ GPM through 6mm tubing. You just can't. So low flow systems capitalize on radiators being the most influential factor in the loop. Drop the temperature as much as possible before returning to the CPU. Instead relying on thermal capacity (like a high flow system), it seems to me that low flow systems rely on temperature differential for effective cooling.

Or maybe I'm rationalizing a flawed design?

[nexxo]

I don't think you are. I also suspect that low flow systems simply emphasise other factors (bigger rads?) to balance things out. In the end, both approaches seem to work, but possibly for slightly different reasons.

[black_dante]

wtf... all the misinformation.... confounding my feeble brain....

wasn't all this shit was explained in the water cooling myths thread by greenman...? :shrug:

http://forums.procooling.com/vbb/sho...ighlight=myths

to quote:

"Myth: Water must slow down to fully absorb heat.
Reality: In a closed loop, a given water molecule actually spends the same amount of time in the radiator no matter how fast it is moving, as long as the water is indeed moving. If this is a difficult concept to understand, think about a racecar on a track. If the track is 1 mile (5280 ft) long and the car is driving at 60 mph, the car will spend about 1 second in a 100 ft stretch. Think of the 100 ft stretch as the radiator. Now, if the speed is doubled, the car only spends ½ a second in the 100ft section, but it passes through that same section twice a minute, so it spends a total of 1 second in the 100ft section per minute."

"Myth: A pump's flowrate is the only consideration to make when choosing a pump
Reality: A pump's maximum head pressure is just as, if not more important. Waterblocks are relatively restrictive, and many aquarium pumps are not made for that kind of restriction. In order to estimate one's flowrate, Calculate all pressure drops, then overlay on top of the pump's P/Q curve. In other words, it's not easy, but consider head pressure, too."

and read this thread

http://forums.procooling.com/vbb/sho...ighlight=myths

to quote:

"-> every time you see a component's performance curve indicating improved performance with a higher flow rate, accept that that component can never perform better at a lower flow rate

-> since both wbs and rads always perform better at higher flow rates, it should be accepted that a higher flow system will always have a higher performance capability (assuming appropriate component selection)

the actual cooling capability of a system will depend on the capability of the components, and their compatibility wrt achieving the system design goals"

note the word "compatability"