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[Official] Corsair Hydro Series Club - Page 1212

post #12111 of 28252
well ive been fooling around with my h50 since June and im just not getting close to the performance that I want and what you guys seems to be getting, I idle at 50c at 3.4ghz and 45c at stock 3.2ghz so I sent in a RMA request to corsair hopefully it all goes well, ill keep you guys updated. Also just to be clear ive tried remounting several times and im using AS5 and when I remove the cooler the paste is spread out nicely.
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post #12112 of 28252
Quote:
Originally Posted by BlackEdition View Post
well ive been fooling around with my h50 since June and im just not getting close to the performance that I want and what you guys seems to be getting, I idle at 50c at 3.4ghz and 45c at stock 3.2ghz so I sent in a RMA request to corsair hopefully it all goes well, ill keep you guys updated. Also just to be clear ive tried remounting several times and im using AS5 and when I remove the cooler the paste is spread out nicely.
ur ambient is?
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post #12113 of 28252
Right now it is at 28c but I have gotten up early in the morning when its cold and at 3.2ghz it idles around 40-43
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post #12114 of 28252
I removed the stock tubes from my h50 yesterday and replaced them with 1/4" ID vinyl tubing from the hardware store. I did this for several reasons, but namely because I didn't like how the stock ones were too long and ripply.

Another reason for doing this was to create a pump performance curve. It's certainly not perfect, nor was my setup, but it's the best we have at this point. Perhaps I'll redo it when I have more time another day.

My setup consisted of the pump pumping water into a tank (my trash can) with intervals marked every 1 inch. The bottom of the trash can was kept at the same elevation as the reservoir (my bath tub) from which the pump was pulling water. This way there is no head on the pump at the start of the test. As the trash can fills, the head over the pump increases, thus making it increasingly difficult for the pump to move water. I recorded the amount of time it took to fill each interval - calculated the volume of that interval - divided it by the time - and thus got the flow rate.

I back-calculated and accounted for the friction losses through the 10ft of vinyl tubing - this turns out to be one of the problems with my setup. The friction losses from 10 ft of tubing at zero static head (difference in water surface elevation between bath tub and trash can at start of test) equate to about 6 in. So what happens is I didn't really get the performance curve out at very low head and higher flow rates. But we get an idea of the trend from the points above.

    
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post #12115 of 28252
Hmmmm

Something seems off in this. I dunno maybe you might try testing different lengths of tubing to see if that improves the GPH flow/fill rate?

~Ceadder
 
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post #12116 of 28252
What is the point of the above plot???
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post #12117 of 28252
Quote:
Originally Posted by Magus2727 View Post
What is the point of the above plot???
It's not as applicable to the h50 unless you're modding it. Normally you would use it to pick an appropriate pump and see where along the curve the pump is operating.

You can calculate the head losses for your water cooling system at a single flow rate - that is the friction losses through the tubing, through all of the elbows and bends, through the radiator, etc. Add them all up and you have the total head loss at that flow rate.

Do that for a whole range of flow rates and you get what's called a system curve - a plot of the increasing frictional losses as you increase flow rate through the system (see the red and green lines in the plot below).

Where the system curve and the pump curve intersect is where the pump operates.



What you see in the above plot is that a more complex system (the triple rad system) puts more strain on the pump - and so the pump operates at higher head and lower flow rate.

REALLY, the point is that one could create a user-friendly spread sheet that generates the system curve depending on the diameter and length of tubing, the radiator, the fittings, etc that the user selects. THEN, the user could select an appropriate pump to go with the system to get optimal flow and cooling. I might already be working on it
Edited by cmeeks - 8/2/10 at 3:07pm
    
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post #12118 of 28252
i understand it in this way, however the heat disipation between the Dual and Tripple radiator would need another y-axis plot to see which is more benifitial?

the Tripple radiator may have a slower rate and run the pump harder but may still provide better cooling with all things equal for CFM pass radiator.

Also wont there need to be a life of pump Vs Total Head to see (if any at all) time you take off the life of the pump running it harder?
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post #12119 of 28252
[QUOTE=cmeeks;10214586]It's not as applicable to the h50 unless you're modding it. Normally you would use it to pick an appropriate pump and see where along the curve the pump is operating.


LOL, with a dual rad and res (which some people have tried) according to your graph, flow rate would be next to nothing with the H50 yet people keep reporting a significant improvement in cooling. Hmmmmm.
    
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post #12120 of 28252
    
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