dual pumps?

[/\/\isanthrope]

how would using two pumps affect a watercooling system?
I'd assume the pressure would increase but not necessarily the flowrate.

-in series or parallel?
-would my power supply(+400w) be able to handle two 12v pumps?
-added safety from redundancy.

Good idea?

discuss...

dangr

[Owenator]

In series the pressure would increase as long as the first pump is rated at equal or higher output than the second. You shouldn't use a lower flow pump to feed a higher flow pump on the same line because the larger pump will be starved for fluid and you could get cavitation. Cavitation is essentially low pressure boiling that causes bubbles that will kill the larger pump.

In parallel you would have more flow. Basically add up the two pumps flowrates.

I like the idea that koolance has, a reservoir with one pump pumping in and one pumping out, that way either pump can do the job if one fails. In their case the series flow pressure increase is lost because you can't pressurize the reservoir like pumps in series on continuous tubes will.

O

[/\/\isanthrope]

I just checked out that Koolance setup... I like that idea.

http://www.koolance.com/products/pc2/reservoir/index.html

Now that I think about it, putting them in series would be a bad idea. If one died, the other one would have to work through it, which could also cause cavitation.

hmm... so, what would be better?
A Koolance-like setup (basically running in series),

---|_P_P_|--- (submersibles in reservoir)

or a parallel setup (two pumps on splitters)?

-with a 'Y' splitting the main line to the two inline pumps and another 'Y' joining them back together. If one failed, that branch would be completely bypassed.

or

-two submersibles in a reservoir with the same input (the res.) and the outputs joined together with a 'Y'

I think I like that last idea best. Really just depends on whether you like 'inline' pumps better than 'submersibles w/reservoir'.

Anybody using 12v pumps? Would they work well in a situation like this?
I don't want the hassle of turning on the pumps separately from the computer.

dan

[Owenator]

Either parallel flom method would work good for pump failure. I line inline pumps myself that way the pump is heating the air inside the case not the water. I wired my pump to the on/off switch in the power supply, that way the pump is always on and running before I power up the PC. THe pump continues to run after the PC powers off I just reach around and switch off the PS to stop it.

O