Good concept?

[Piospi]

Hi, I plan to add external cooler to my computer. I suspect that one D5 pump cann't handle such a system. So I'm forced to give two pumps.

I put a pump in the image in the computer case because I would love to have a D5 with Bitspower Mod Kit. The second pump would be behind the radiator.

Is such a concept good?

 

Thank you for all the suggestions

[emosun]

wouldn't two in line pumps eventually make a situation where one is out flowing the other , even if they are the same pump? so eventually you's have one pump trying to either push the other pump or one pump trying to suck water through the line from the other pump.

if you're going to do this, put EVERYTHING outside the case even the res , like a car would have it.

Have only the tubes and blocks inside the case. Use a single stronger pump. Two small pumps means two points of failure. Should in theory work pretty good though.

[kb5zue]

From looking at your pic, just trying to figure out what the item is that looks like a cupcake baking pan.  On the other side, Identical pumps do not necessarily pump identically.  That is one of the reasons that automobiles only have one water pump.  If the pump on the input side of the reservoir pumps fluid faster than the pump on the output side of the reservoir, then the reservoir runs the risk of overflowing and damaging your system while on the opposite side of that puzzle, if the output pumps fluid faster than the input, then the reservoir runs the risk of running dry and then everything smokes due to the lack of coolant and everything overheats.  So, as you depict your system in the drawing, two pumps is not a good idea.

 

If you want to run a two pump system, that's fine, but the better way to do it would be to have one complete cooling system for the cpu and one complete system for the GPU.  One thing to remember is that whatever goes out must come in and the opposite is also true.  What comes in, must go out.

 

 

[emosun]

this might work better

use a rad with kiddy corner connections so the water flows downward and the pump only has to pump the water upward a single time. After the water flows through the machine it's all downward movement back to the radiator and even through the radiator so no second pump is needed.

[cnerde]

Multiple pumps have been done before - by Linus. Times an entire room full of PCs. 
The longer the tube, the more compression / pressure lost on pushing on the tubing and opportunity to slow down the liquid has. 
A giant high-pressure pump behind a tiny crappy one won't end well, but Linus used a large one to power the big part, and I think D5s in every PC.

Not to mention the hundreds of dual pump water cooling setups - all inside a case. For redundancy and added flow. (usually the same model pump in these cases)

For example, a cool dual pump product;    --https://www.ekwb.com/shop/ek-xtop-revo-dual-d5-pwm-serial-incl-pump

Quote

"......comes pre-installed with two (2) EK-D5 PWM water pumps operating in series.

Using two water pumps in series provides almost twice the head pressure of a single water pump and also guarantees top safety measure - in the case of one pump fails the remaining one will provide sufficient liquid flow to prevent any hardware damage due to overheating. Additionally, there is no downtime until next scheduled maintenance.

 

IMO, the way you're thinking is the best for an even flow of liquid, and will still provide some redundancy. (AKA, still usable and you'll eventually notice, it won't just bake in a few minutes)

[Mick Naughty]

Why not just sit it next to the pc or on the floor next to the desk?

[For Science!]

On 10/28/2017 at 11:08 AM, Piospi said:

 

Dual pumps are completely okay. Although you do not have to have them separated since the overall headpressure would be the same if the pumps are in serial. There are products like these that conveniently puts 2 pumps back to back to achieve a similar result to what you are describing. I recently built a system with 1200mm of radiator space, 4 GPU blocks and a CPU block and this dual  D5 pushes water just fine.

 

https://www.ekwb.com/shop/ek-xtop-revo-dual-d5-pwm-serial-incl-pump