low flow rate 28l/h

Dwayne Dibbley

Dwayne Dibbley

Dwayne Dibbley

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Joined
26 Apr 2007
Posts
5
My current setup comprises of:

Coolermaster CM Stacker
Alphacool NexXxoS NVXP-3 ATi X1900/X1800 Water Block
Alphacool NexXxoS XP Rev.2 CPU Block
Alphacool NexXxoS Pro III Radiator (3x120)
Alphacool NexXxoS Pro I Radiator (1x120)
AGB Eheim 600 Station 12V Pump
Alphacool Thermosensor In-Line
Alphacool Flow Meter Sensor

loop runs PUMP>GPU>FLOWMETER>1x120RAD>CPU>3x120RAD>TEMPSENSOR>PUMP

monitorer by t-balancer, flowrate shows up as 28.3 l/h

Would i be better off purchasing a DDC 18w and some external reservoir to get the flow rate up.

Thanks

Nigel
 
Your flow meter is almost certainly wrong. Although the Eheim 600 is not great, I doubt that the restriction can be high enough to cut the flow that much.
 
under the t-balancer software it is calibrated to 509 pulses a litre which is i think correct for this flowmeter. with the return pipe disconnected from the pump and into a container the flow rate does not look that fast ie at least a couple of minutes to fill a 1 litre jug which matches the 28l/h figure
 
Then either you have something really restrictive in that loop or the pump is faulty. have you tried the pump some pipe and the flowmeter to see if the pump is pushing what it's supposed to.
 
The Nexxxos series of blocks are very restrictive, & the flowmeter and thermosensor will be restricting it even more.

Try removing the flowmeter and thermosensor and monitor temps through T-Balancer/MBM to see if it's improved enough before buying a DDC.
 
2 rads
2 blocks
narrow bore tubes (probably)
2 sensors
weak pump

28 Lph looks about right to me.

You could always get a second pump and either -
Make 2 loops
(or considering that you want to keep the 2 sensors on 1 loop)
Just ADD the DDC to the existing loop.

I don't think it will be a problem with having 2 different rated pumps as the flow combined will still be less than the max rated of the slower one (probably) as your loop is so restrictive.

/edit/ for got the most important Q - why do you need more? are your temps high or just that T-balancer showing low flow?
 
Results breakdown:

pump with flowmeter loop 1.7 l/min
pump with flowmeter and graphic block 0.5 l/min
pump with flowmeter and 120x1 rad 1.7 l/min
pump with flowmeter and cpu block 1.0 l/min
pump with flowmeter and 120x3 rad 1.5 l/min
pump only 7.5 l/min

Flowmeter eating 5.8 l/min followed by GPU block 1.2 l/min giving me 0.5 l/min / 30 l/hour.

flowmeter removed......

would the D12 give a better throughput through the GPU block?

Thanks
 
As you have highly restrictive blocks you need a high head height pump such as a Aquaextreme 50z, DDC. Hopefully some of the WC experts will take a look at this thread.
 
Heh - you already have MikeTimbers... and I haven't seen Cathar on here in goodness knows how long. I think he might be busy...

As to the flow rate, from what I remember of other pump reviews (around three years ago) it seems a bit low, but it wouldn't surprise me. Considering that's an Eheim 600 in there (600lph and around 15cm head height - ok, around 90cm), the poor thing is going to get pretty hot and sweaty trying to force water through that loop of yours.

I'd swap it out for (in an ideal situation) one of those dual Laing DD pump outfits (around £90) or even just a single one... watercooling has come a long way since custom-drilled blocks so there isn't any need to keep one in your system (says he with a Hydor L30 bumming around somewhere... :) ).
 
heres a pic of my current setup STACKER

3x120 in the roof of the case 1x120 in the rear of the case ( half way up ).

if i did (will) replace the pond pump :) i would obviously need a reservoir with the above recommended pumps, any tips on where would be the best place and what reservoir to install

Thanks again
 
My opinion

scrap all meters and make 2 loops.

existing eheim > 120.1 > gfx

DDC with alphacool res > 120.3 > cpu

Possibly change fittings and tubes on loops to 3/8" id or 1/2" id and try not to use any elbows if poss.

You can use T-balancer to monitor DDC rpm & component temps and have it control fan speeds and shut system down at critical temps of component. No need to monitor water temp or flow. (the irony of using a flow meter for peace of mind that cripples flow is crazy)
 
To be honest, with the modern pumps currently in circulation (sorry), large bore tubing doesn't make as much difference as it used to. This is because the new pumps have massive head pressures and can therefore force the water through narrow bore without losing too much flow.

Stick an Eheim 1250/Hydor L30 in a 1/2" loop and they'll make 1gph if it's doing well... in a loop like yours, Dwayne, they wouldn't fare too much better than your current Eheim 600. With a Laing DD (especiaily the Ultra models) you'd probably get more despite the maximum quoted flow rate being lower simply because the head pressure is four times greater.

If you're going with a reservoir, stick it at as high a point as posisble in your system so it collects all the bubbles... :)
 
OK im up for two ddc's

1 ddc ultra 18w (petras top) + 120.1 + GPU block + mini res ( swiftec maybe ) mounted at top of case but below top 120.3 rad
1 ddc ultra 18w (petras top) + 120.3 + CPU block + mini res

all with 1/2" barbs and 1/2" id tubing

hey it pay day............

unless any other ideas on the circuit

Thanks
 
That does look like a tasty improvement.

The masterkleer is a good option too.

You might want to consider not going the whole hog and just do what I suggested above and upgrade the cpu loop with new pump and tube and use the old pump for gpu. The eheim will have a much easier life than before and be more than adequate for the gpu as far fewer restrictions.

You never answered WHY you needed / wanted to do this.... was it because you were aware of low flow, or were temps bad, or just because you knew it could be better? (because you can?)

If money is no object, do what you suggest with a complete overhaul and upgrade of pumps.

For almost the same performance split the loops, ditch the meters and get bigger tube and pump just for cpu loop - although this means no matching pumps and different tube sizes (less bling?) (much less hassle)

I'd say those are the 2 main options, both will give improvements, one option is way more costly than the other.

Your choice bro :D
 
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