Central cooling

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Re: Central cooling

Post by 4hams on Wed May 25, 2011 8:42 am

Anytime you have any updates Mike, we would love to see them and read about them!

thanks
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Re: Central cooling

Post by grumpydaddy on Wed May 25, 2011 4:22 pm

in the post today smile: .....a variation of this




Need to get adapters to fit to copper pipe now. The low end accuracy might be iffy for a single rig but remember this will be reading the total flow

a few more details...

http://www.razhodomeri.com/k_razh/1065_K24.pdf

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Re: Central cooling

Post by bob2701 on Wed May 25, 2011 5:24 pm

Cool flow meter.
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Re: Central cooling

Post by SavageNFS on Wed May 25, 2011 5:53 pm

nice meter grumpy...what a neat project :D:
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Re: Central cooling

Post by 4hams on Wed May 25, 2011 6:29 pm

Looks like a decent unit Mike! I like the fact it can be mounted vertically or horizontally as the readout display can be rotated.
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Re: Central cooling

Post by grumpydaddy on Fri May 27, 2011 3:45 pm

What with all the changing the layout re soldering and such it seems I have managed to get a fair bit of crud into this "loop".

I had reached the point where the flow through a gtz, nb and sb blocks and 2 vrm blocks all in series was greater than that through an EK HF affraid

So, just for fun I reversed the flow through all the blocks....

Flow rate before was around the 5.2 liters per minute on the new meter.

and after....

21.2 liters per min. :Winner:

So now I find that this pump is spot on for the task at hand after all.

I will stick with liters when in here because of the international audience and the fact that an imperial gallon is 4.55 liters while a us gallon is 3.79 liters

So just this once..

a single EK HF on this pump gets 10.2l flowrate = 2.24g imp or 2.69g us
2 get a 15.4l flow rate to share = 3.38g imp or 4.06g us
3 get a 19.5l flow rate to share = 4.28g imp or 5.14g us
adding the old fully waterblocked rampage takes the total to 21.2l/min so it is likely getting only around 1.7l/min (0.37 or 0.44galls) Does it overheat at this flowrate??? How does 22 deg over ambient sound smile:

even the i7 950 @ 1.45v is only 40 deg over ambient just now and there is still plenty of room to tweak this

Happy day

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Re: Central cooling

Post by SavageNFS on Fri May 27, 2011 4:39 pm

Wow...that is great news grumpy. I'm a little confused on the flow rate increasing after reversing. Did reversing the flow free up the crud or is the pump just that much more efficient in the other direction? Or am I missing something completely?
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Re: Central cooling

Post by grumpydaddy on Fri May 27, 2011 5:25 pm

My assumption at this time is that The jet plates fitted to the HF's had a build up of crud pressing into the slot which is only small and thin ( there are some pics here http://www.evga.com/forums/tm.aspx?m=843853&mpage=1 I have the one with the least slots fitted)

The pump should be capable of over 6 meters of head @ 12l min and with minimal (equiv to 2m restriction) is capable of 42l/min

I see the only issue is keeping the restriction as open as possible so that flow is not limited. The rad and pipe work present around 2m head restriction.

I believe that six rigs should run @ around 1 gall US min each if all run parallel but if I am wrong then I can exceed that by moving to 3 sets of 2 blocks in series
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Re: Central cooling

Post by 4hams on Fri May 27, 2011 7:25 pm

Does this mean the whole system needs a full flush and if the flow increased that much after a backwash do the blocks need to come off and be scrubbed clean?

This is really a cool thread to follow! smile:
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Re: Central cooling

Post by grumpydaddy on Sat May 28, 2011 5:07 am

Just to further clarify (i'm re-reading after a nights sleep).......

Reversing the flow through the blocks was done by taking the connections to each block and reversing them. The pump always flows the same way it is centrifugal.

Regarding cleaning out the system ....I will dump the current coolant and then flush a few times in both directions, then I will refill and when I have the 4th and brand new block I will double check the single block flow rate to see if it is the same then compare the temps.

Not soon though... need to pay for Holidays and car repairs first
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Re: Central cooling

Post by 4hams on Sat May 28, 2011 6:54 am

Damn holidays and car repairs always seem to get in the way of the important thing...
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Re: Central cooling

Post by bob2701 on Sat May 28, 2011 7:00 am

It would be interesting to see what the flow would be in the normal position after the backflush. Was it crud or restrictions built into the blocks.
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Re: Central cooling

Post by grumpydaddy on Sat May 28, 2011 8:24 am

I'll do another quick reversal sometime soon to check that even if only on one block. I need more taps to make it easier to do these little experiments smile:
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Re: Central cooling

Post by SavageNFS on Sat May 28, 2011 9:28 am

Thanks for the explanation...much clearer now. There is never enough fun coupons to go around lately these days.
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Re: Central cooling

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