Flow for dual heater cores

[torin3]

I'm planning on building my own computer case since I'm finding my current full tower a bit cramped. Plus I like the UV reactive acrylic. Anyway, looking for some design paramaters for the water cooling I'm going to have in it.

I've got a 226W peltier with a Maze4-1 which I'll be moving over to the new system. I'm currently using the 2x120 heatercore that DD sells. I'm planning on getting another one and probably running them in series. I'm looking at how many feet of head and how many gallons per hour I need to handle both heatercores. I'll be adding in at least one and probably 2 more peltiers to handle the GPU, so I'll need to dump a fair amount of heat.

Thanks for the suggestions.

[-=Mr_B=-]

Silly question, putting them in series would increase resistance, and slow down the entier loop, if my maths and memory are right, hooking them up paralell will slow down that part of the loop, and increase it where its needed, in the waterblocks (due to lower resistance), would there be a reason not to do this ?

Since the water will be runing at half the speed in the heater core (third if your running three rads) you should be more then able to cool the water sufficently anyway, and as mentiond the lower resistens would provide a higher flow, compared to a seriel setup... (if memory is true, you might actually gain speed on paralell vs single rad setup, based on the lower resistance)

The only real problem i see with it, would be getting a 3 way hose split, since you want to get equal amount of water in each way... meaning you need a hose splitter that dosent have one straigh forward pipe, all 3 "out" has to have as far to travel, or atleast as hig resistance..
might be easyest to do it from a ball shaped object, put one "intake" and measure out the oposite side as close as possible, and try to fit the three "out's" as close to the center as possible, and glue it all up.
Possibly a short pice of bigger tubing, a plexitube or something could do, and just as wide to fit 3 straight forward going fittings on one end, and a input on the other end...

Both should be easy to make, if you can find the supplies... the "tube" aproach needs to reach some length, if its 3-5 times the diameter of the tubes oposing one and other, or it could create some nasty backpreasure, dunno at all about the ball, just remember using sutch for an entierly different application (aquarium related actually)

Atleast half my post is based on a silly technicality, not really related to the topic at all, but i hope it helps some...

When it comes to pumps... I allways recomend the Hydrothrustor Q2 magnetic drive pump.. it might be overkill for some, but it delivers bothhead, and flow (its a 2 heads unit, each head producing something like 1000gph while liftin 1 foot up...preasure is somewhere around 9-9.5 psi - more then enough for anything you might wanna call "pretty extreme")

A pond, or aquarium reseller should be able to hook you up.. if not, tell em to try harder.

Best of luck.
B!

[torin3]

Well, running them in series had more to do with asthetics than anything else. Also, I was thinking that I could start out with the GPU on it's own loop and run two separate loops (peltiered and non-peltiered) for a while until I get the money saved for the peltiers. Also, if the gph was too high, I would probably get two cheaper pumps and run the two separate loops then anyway.

[-=Mr_B=-]

you cold offcourse run 2 loops, but i se no real benefit... using the Hydrothrustor would let you run both rads, direcly of the pump, and from there hook em up to one tube,passing both the gpu, and the cpu.. possibly anything else you want while at it, and then split it up fot the returning to the pump again. i allways tend to recomend pump - rad - cooling when the subject is on topic, due to the pumps adding a little to the water temp... IF your pumping 2000gph, your not going to need to worry to much about what item gets the cooler water... AND with 9.5psi preasure you could use pretty much any water block, no mater how restrictive...

Well, best of luck.
B!

[jamesavery22]

Got any links to where you can actually buy a hydrothrustor? I dont see any.

[SewerBeing]

Silly question, putting them in series would increase resistance, and slow down the entier loop, if my maths and memory are right, hooking them up paralell will slow down that part of the loop, and increase it where its needed, in the waterblocks (due to lower resistance), would there be a reason not to do this ?

Water does not slow down or speed up because you put the heatercores
in parallel

Since the water will be runing at half the speed in the heater core (third if your running three rads) you should be more then able to cool the water sufficently anyway, and as mentiond the lower resistens would provide a higher flow, compared to a seriel setup... (if memory is true, you might actually gain speed on paralell vs single rad setup, based on the lower resistance)

Umm... No, water does not slow down entering them or gain speed exiting them its physically impossible.

The only real problem i see with it, would be getting a 3 way hose split, since you want to get equal amount of water in each way... meaning you need a hose splitter that dosent have one straigh forward pipe, all 3 "out" has to have as far to travel, or atleast as hig resistance..
might be easyest to do it from a ball shaped object, put one "intake" and measure out the oposite side as close as possible, and try to fit the three "out's" as close to the center as possible, and glue it all up.
Possibly a short pice of bigger tubing, a plexitube or something could do, and just as wide to fit 3 straight forward going fittings on one end, and a input on the other end...

Both should be easy to make, if you can find the supplies... the "tube" aproach needs to reach some length, if its 3-5 times the diameter of the tubes oposing one and other, or it could create some nasty backpreasure, dunno at all about the ball, just remember using sutch for an entierly different application (aquarium related actually)

Ok thats all just illogical and wont do anything

Atleast half my post is based on a silly technicality, not really related to the topic at all, but i hope it helps some...

When it comes to pumps... I allways recomend the Hydrothrustor Q2 magnetic drive pump.. it might be overkill for some, but it delivers bothhead, and flow (its a 2 heads unit, each head producing something like 1000gph while liftin 1 foot up...preasure is somewhere around 9-9.5 psi - more then enough for anything you might wanna call "pretty extreme")

That pump is way too strong for a loop, you want a more reasonable option than that such as the swifttech or DangerDen 12v pumps

A pond, or aquarium reseller should be able to hook you up.. if not, tell em to try harder.

Best of luck.
B!

The Parallel approach is still better for heatercores. My guess is its because more heat is transferred between to places when the temperature differences are greater. So if they were in series the first one would be good and the second one would be less effective than it could be.

[jamesavery22]

Water does not slow down or speed up because you put the heatercores
in parallel
...
Umm... No, water does not slow down entering them or gain speed exiting them its physically impossible.
...
That pump is way too strong for a loop, you want a more reasonable option than that such as the swifttech or DangerDen 12v pumps



Ive read quite a few times before that putting 2 rads in parrallel gives less resistance than just one single rad of the same type... Less resistance = more flow. Thats what he was saying.

Dont think he was saying water would accelerate through a heatercore or anything. Just that with 2 rads in parrallel the water flowing through each channel of the HC's would be 1/2 the gpm of the flow in the channels of just 1 radiator. Just think he said "speed" when he should have said "flow." Course that math is off because if you used the same pump the combined flow through 2 rads would be more than than the flow through 1 rad. So the flow through each channel of the 2 rads would probably be more than 1/2 the flow through the channels of a single rad.
hope that made sense =) inhaled too much acetone this morning

I agree with the pump though. Dont think it matters as I cant find any place that actually sells them. Just a few links to archived forums over at procooling of people asking where to buy them and not getting answers =)

[-=Mr_B=-]

the relative waterspeeds are lower in a paralell setup, and higher in a serial, however, having two paralell rads means lower speed, wich decreases the resistance (compared to the HIGHER recistance of 1 rad in the higher speed setup of the seriall) and that way creating multiple benefits for a paralell setup. Thats what i was aiming at from the beguining, and what Jamessavery22 said aswell.

I tend to dissagre, there is no sutch thing as a "to powerfull" pump, however its been brought to my attention that availability might be "sinking" fast.. since Filtronics that made the pump, is out off buisness..

The part that was responded "just illogical and wont do anything" is based on the possible adding of a third rad, and somewhat of topic. However the basic is that you dont want to add 2 T's to make a 3 way split, since this will create different flowrates on the different tubes, just as making a long tube with multiple holes in it, will provide most flow / preasure in the hole farest of to the end, and not the hole closest the the water entery point in the tube. Something worth thinking about when you try and configure your cooling. (and as i said, that wasent realy related to the topic, i allready pointed it out.)

Off topic again, MOST (not all, but most) 1 pass rads actually take advantage of multiple pipes having the effekt of slowing down water, and lowering recistance, mer specificly, a one pass, and a <insert number here> pass rad containing the same amount of water, has the same time used to pass the water from one and to another, but the water travels further in a clasic pipe style multipass rad.

Well, as said, best of luck.
B!

Oh, and "" aint quotes, its something that needs to be inturpertated (or whatever THAT word spells like), and i do beg for your forgivness, im not nativly speaking english.