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Heat exchanger thought

post #1 of 11
Thread Starter 
So, I've been planning some awesome stuff and, without revealing too much wink.gif, I have a theoretical server system that will be liquid cooled.

I was hoping to bleed some of the heat off the system to a secondary radiator that I could turn on and off. The second radiator doesn't have fans and will work to heat another object through convection etc.
The thought I had was to hook up a second pump to the secondary radiator and control the flow of the second RAD by turning the pump on or off or possibly variable speeds.

I've attached a picture of what I'm thinking of using to transfer heat to the secondary RAD system:
It's a four port reservoir:

450

Any thoughts, suggestions comments, or otherwise would be appreciated.

Cheers,
Sparhawk

EDIT: Something like this could work as well I suppose, but I don't need the liquids to be separate: http://www.frozencpu.com/products/9914/ex-rad-170/Koolance_HXP-135_Plate_Heat_Exchanger_no_nozzles.html#blank
Edited by Sparhawk - 1/18/12 at 9:16pm
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post #2 of 11
Will work fine given the water flows are truly turbulent. Much of the time they will form separate streams and buffer themselves.
Seems easier to put some open and closed valves and just have the one loop with a bypass equipped. Only would take two hand valves to do it.
post #3 of 11
Thread Starter 
Hmm, Thanks for the idea! That could work, if I can find a computer/electronically controlled valve, I was hoping to have the system automated, so I didn't have to constantly monitor it.
The second system would in theory turn off and on depending on a temperature range. With a pump this would be relatively easy (although I'm not sure of the long term effects of having a pump cycle on/off frequently), I'm not sure if I'll be able to find a switch/valve that will be relatively cheap and work as well as I'd like. thinking.gif

In theory because the reservoir has a divider it should force the streams to mix/flow together. I may have to play with the arrangement of the inlets outlets but it should mix pretty well. redface.gif Although, I really don't have much hands-on experience with liquid cooling.

Lots to consider. Once I have a general idea/layout I'll be able to see if I've got the funds to build this crazy thing.
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post #4 of 11
You have an odd system in mind. wink.gif
But for electronic valves, you want solenoids. Easy to work with. Can be triggered with a nice fan controller that lets you turn fans on and off (and wire relay to solenoids instead!)
post #5 of 11
Thread Starter 
Excellent idea, now I just have to see if I can source a 5V or 12V DC solenoid valve.
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post #6 of 11
On ebay you'll easily find 110vac and 24vac solenoids. The trick is to use the fan controller to trigger a relay. The relay can close a contractor for AC current or just be an AC current relay to allow power to the solenoids. That way the solenoids dont run on your computer power supply, and are cheaper and easier to source.
Of course list price you can find them on Mcmaster.
post #7 of 11
Thread Starter 
Is there a reason running it off of the AC lines would be better?
I was thinking for wiring and safety it would be better/easier to use 12V because I can run it right off of the fan controller.
A few solenoids I've found on ebay have 12VDC, 24VDC, 110VAC, and 240VAC options that are all the same price so cost doesn't seem to be too much of a factor.
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post #8 of 11
That he from frozen cpu is actually pretty good. You don't want to mix your liquids even if both of them are water. That's a petty good heat exchange for such a small he.
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post #9 of 11
What is the point of having a second radiator that can be shut off?
post #10 of 11
Just add a second rad in your loop with a fan that comes on within a certain range. It can just be passive till you need it.
Or are you making a coffee warmer or foot warmer something like that? If the 2 loops are going to come into contact with each other you could just put some nipples into a pop bottle or some sort of can or manifold. You really dont need that block for anything.
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