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Dual Pump

Ghost
By Ghost
in Custom Loop and Exotic Cooling
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Well the watercooling section has been a bit dry for the last day or so so I thought I might make this controversial thread.

Its been talked about before but when do you think you should get a second pump. I am actually considering it because I will have >1.5L of coolant in my next loop upgrade thingy. I wouldn't want to "stress" my pump, especially when it starts when the water has to build up its momentum.

What other reasons could you think of where you would need two pumps and what do you think of my above reason.

Feel free to PM for any water-cooling questions. Check out my profile for more ways to contact me.

 

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I am new to this but I would think it would have to do with the amount of head pressure you need to overcome. If I remember that correctly it would be the resistance you need to surpass from friction loss, elevation, and appliances in the line. Friction loss can be described as the loss of pressure due to the turbulence of the moving liquid coming in contact with the inner surface of the tubing. there is also loss of pressure from the liquid traveling through connectors and fittings (rads, barbs, angled fittings, blocks, etc.). therefore I would think that if you were adding more Rads, water blocks (CPU, GPU, RAM, Chipset, Motherboard), angled fittings, and the like, you would need to add a second pump. Remember that an object in motion will remain in motion and in the same direction of travel unless acted upon by another outside force. I think i messed up the wording but you get the point. Therefore we should try to keep our tubing runs as straight as possible. When you add abrupt directional changes energy is lost in the form of friction.

On the other hand depending on the style and location of your reservoir, relative to your pump, you could get a slight bump to the intake pressure on the pump. A column of water 1" square and 1 foot high weighs 0.434 pounds. In a computer case there is not much room to go very high but one of the tube type reservoirs directly above a pump will increase the pre-pump pressure slightly therefore allowing the discharge side of the pump to have an increased pressure as well spinning at the same RPM.

​I think I remembered my hydraulics correctly if I didn't forgive me and I will correct it.

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What pump do you have? Something like one of the oem'ed versions of the Laing D5 variable speed, that thing can push 1.2l/h and has 50psi. Something like that should be able to satisfy all but the most ridiculous of builds. Second pump? Maybe if you are really worried about pump failure. That be it. Run the two in series...

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Head pressure is totally irrelevant once the system is primed as the force required to push the water skywards is exactly (near enough anyway) equal to the force caused by the water falling earthward. There is no potential for flow. This is why siphons work, there is a potential between the high point and the lower point.

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What pump do you have? Something like one of the oem'ed versions of the Laing D5 variable speed' date=' that thing can push 1.2l/h and has 50psi. Something like that should be able to satisfy all but the most ridiculous of builds. Second pump? Maybe if you are really worried about pump failure. That be it. Run the two in series... [/quote']

Laing DDC 18W; 2 years of running (about 9 months non-stop)

Feel free to PM for any water-cooling questions. Check out my profile for more ways to contact me.

 

Add me to your circles on Google+ here or you can follow me on twitter @deadfire19.

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Laing DDC 18W; 2 years of running (about 9 months non-stop)

Awesome pump! :) Maybe get a second as primary and have that one as backup...

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What pump do you have? Something like one of the oem'ed versions of the Laing D5 variable speed' date=' that thing can push 1.2l/h and has 50psi. Something like that should be able to satisfy all but the most ridiculous of builds. Second pump? Maybe if you are really worried about pump failure. That be it. Run the two in series... [/quote']

Laing DDC 18W; 2 years of running (about 9 months non-stop)

i have 2 DDC 18w pumps (total overkill for my system), i split my loops, one for cpu and one for gpu. there are some really nice koolance bay res's for the pair. may be get some hardware to calculate the flow speed (can get them for >30) and run with one, get back with the data and it should be fairly obvious if your need another pump
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A bit of a random question.

I have a Laing DDC+ 1T 18W pump. I am planning on buying another pump. If I buy a dual pump; pump top. Will both pumps have to be the same model of the DDC.

Firstly I was looking at flow rates but I can't get a straight answer for my pump. Some say its 600lph and some say its in the region of 900lph. I heard it doesn't matter if you have two pumps in parallel at different speeds but will it make a difference if it under the same top?

Now I know it most probably won't matter but I am looking for a "I have dealt with this before" answer. Not a guess.

Feel free to PM for any water-cooling questions. Check out my profile for more ways to contact me.

 

Add me to your circles on Google+ here or you can follow me on twitter @deadfire19.

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A bit of a random question. I have a Laing DDC+ 1T 18W pump. I am planning on buying another pump. If I buy a dual pump; pump top. Will both pumps have to be the same model of the DDC. Firstly I was looking at flow rates but I can't get a straight answer for my pump. Some say its 600lph and some say its in the region of 900lph. I heard it doesn't matter if you have two pumps in parallel at different speeds but will it make a difference if it under the same top? Now I know it most probably won't matter but I am looking for a "I have dealt with this before" answer. Not a guess.

I haven't dealt with before. :D But in series I am pretty sure from all my research you want the same flow rate while in parallel it isn't so critical.

Forum Links - Community Standards, Privacy Policy, FAQ, Features Suggestions, Bug and Issues.

Folding/Boinc Info - Check out the Folding and Boinc Section, read the Folding Install thread and the Folding FAQ. Info on Boinc is here. Don't forget to join team 223518. Check out other users Folding Rigs for ideas. Don't forget to follow the @LTTCompute for updates and other random posts about the various teams.

Spoiler

Whaler_99 Links - "Green Machine" (watercooled), "Out of the Blue" (watercooled), My 4P Folding rigs, My multi GPU Folding Rigs, The Water Cooling FAQ, My 40TB Storage Server, My Folding Stats. The CM HAF XB review, the Aqualis Pro 450 review, the PrimoChill CTR Phase II Res review, the IcyDock ToughArmor 6x1 review, the 3x2 Storage Cage review, the 5x3 Storage Cage review, my Milwaukee Jobsite Backpack review, my Thermaltake Core X2 review, my CoolerMaster Storm Stryker overview. Link to DA Blogs home.

Follow me on Twitter for updates @Whaler_99

 

 

 

 

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2 x aquacomputer 680ltg blocks, 1 x mips iceforce cpu block, 2 x koolance QDCs, lots of tubing and a 12x140mm rad (1260) = single D5 on slowest setting ;)

I'm ditching this huge rad soon and adding another cpu block (probably raystorm) and 3x180mmx45mm + 240mm 80mm thick rads. Will still be on a single d5.

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2 x aquacomputer 680ltg blocks' date=' 1 x mips iceforce cpu block, 2 x koolance QDCs, lots of tubing and a 12x140mm rad (1260) = single D5 on slowest setting I'm ditching this huge rad soon and adding another cpu block (probably raystorm) and 3x180mmx45mm + 240mm 80mm thick rads. Will still be on a single d5.[/quote']

yeah, itll do the job, just fine.. and prolly on the lowest setting again.

MoeBrowne said it.. once the system is purged of air.. 1:1 flow is achived.

speed would be if the coolant is blastin through the rad too fast, not able

to transfer heat quick enough. slowing the flow allows the coolant to sit

in the rad longer to dissapate heat longer..

the flow-rate is influenced from length of hose, restrictions (blocks), pump

top, and massive amounts of X° fittings (20+)

airdeano

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What is the opinion on two weaker pumps? Like using two of the XSPC X2O 750 Reservoir and Pump V4's? Two of those are the same price as a basic D5 and a res.
The may have a smaller MTBF. So even though you are using two pumps they would be less reliable than an expensive pump. They may also be noisier.

Feel free to PM for any water-cooling questions. Check out my profile for more ways to contact me.

 

Add me to your circles on Google+ here or you can follow me on twitter @deadfire19.

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What is the opinion on two weaker pumps? Like using two of the XSPC X2O 750 Reservoir and Pump V4's? Two of those are the same price as a basic D5 and a res.
Exactly Ghost - two lower quality pumps do not equally one high quality pump - esp when it is something as important as your pump.

Forum Links - Community Standards, Privacy Policy, FAQ, Features Suggestions, Bug and Issues.

Folding/Boinc Info - Check out the Folding and Boinc Section, read the Folding Install thread and the Folding FAQ. Info on Boinc is here. Don't forget to join team 223518. Check out other users Folding Rigs for ideas. Don't forget to follow the @LTTCompute for updates and other random posts about the various teams.

Spoiler

Whaler_99 Links - "Green Machine" (watercooled), "Out of the Blue" (watercooled), My 4P Folding rigs, My multi GPU Folding Rigs, The Water Cooling FAQ, My 40TB Storage Server, My Folding Stats. The CM HAF XB review, the Aqualis Pro 450 review, the PrimoChill CTR Phase II Res review, the IcyDock ToughArmor 6x1 review, the 3x2 Storage Cage review, the 5x3 Storage Cage review, my Milwaukee Jobsite Backpack review, my Thermaltake Core X2 review, my CoolerMaster Storm Stryker overview. Link to DA Blogs home.

Follow me on Twitter for updates @Whaler_99

 

 

 

 

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