Pump Power

[USMCGrunt]

Just curious, is there a way of figuring out how much tubing you can use with a specific pump before its too much to be useful?

I've decided that im going to run my radiators into the basement and let it exhaust the hot ass air into an unused living space that can take the heat. I figure I could take a blank wall plate and drill out some holes for connectors to screw into and use a couple 45 degree connectors inside the wall to keep the hose from being kinked. I imagine i'd be adding about 6ft of tubing total plus the 2-3 ft of total tubing inside the case currently. Specs of the used hardware are in the sig. I figure if neccessary, I could pull a pump out of the resevoir and put it in the basement to help push the water back up after it goes through the radiator and just have a dual pump/single loop system.

 

[Hotar9978]

Try this: http://martinsliquidlab.org/pump-and-radiator-optimizer-spreadsheet/

9ft of tubing doesn't sound very restrictive and it is roughly 3 elbow fittings if the saying of one elbow equals to 3ft of tubing is correct. I'm sure two pumps would be more than adequate.

 

[USMCGrunt]

Try this: http://martinsliquidlab.org/pump-and-radiator-optimizer-spreadsheet/

9ft of tubing doesn't sound very restrictive and it is roughly 3 elbow fittings if the saying of one elbow equals to 3ft of tubing is correct. I'm sure two pumps would be more than adequate.

Got the chart but most of my equipment isn't listed in that spreadsheet. I used parts that either had the highest restriction or are closest to what I would be using. According to the graph i'd end up with a flow rate of about .9GPM which it says is just barely within the Good Balance range.

In case you'd like to check my work to see if im being too conservative:

13ft of 1'2 tubing (about 1-2 more then actual usage)
Swiftech Apogee XT Rev 2 CPU block
x3 EVGA Hydro Copper 480 GPU blocks

Swiftech MCR 220 Radiator
Swiftech MCR 320 Radiator

Laing D5 x2 Koolance PMP 450 Setting 5 (Seperate series or dual in pump didnt change on the graph though in reality I imagine having one at the bottom and one at the top of the loop would be beneficial)

8 BP Rotary 90 degree barbs
1/2" resevoir
2 Koolance VL4 QDCs
10 BP 1/2x3/4" Compression fittings

 

[spitter]

Gravity has no effect on closed loop, no need to add an extra pump in the basement. I have added 27 ft of 3/8" tubing to my loop and had no change in temps from it. If you can go with rigid tubing, gravity does effect tubing.

 

[USMCGrunt]

Gravity has no effect on closed loop, no need to add an extra pump in the basement. I have added 27 ft of 3/8" tubing to my loop and had no change in temps from it. If you can go with rigid tubing, gravity does effect tubing.

Well, I have two pumps already running two seperate loops in my system. It seems to me that having two pumps pushing from the same location would be less effective then having one pump at the resevoir (in the system) and the other pump located on the other end of the loop (which would happen to be in the basement at the rads). Although im running a dual loop now, to cut down on cost and trouble, i'd run a single loop with both pumps running in series.

 

[Tsumi]

In a closed loop, the water moving down will push/pull the water coming up, so the net effect of gravity will be nothing. The water loop cannot be broken up, air cannot magically appear in the middle of the loop.