Hybrid SingleStage Watercooling in Lian Li PC-201

[DagoDuck]

Actually I did not want to make that public. I cannot understand it also. As for myself I'm going to fix the problems! No reason to make things worse. Just wait. Even some patience, please.

[jcool]

Hey, no hard feelings here. I just thought maybe someone knows what's up, that's all. I know you're going to fix it and that you've done your best, and like I said earlier, overall build quality is still excellent.

[tim-]

assamble a 38mm thick fan (much better capacity to pull/suck true a condenser then a 25mm one). something like 120-130cfm and you will see it works better those 25mm fans will just cause you problems.. i've been there done that.

[jcool]

As a matter of fact, I have tried with a Silverstone FM122 Fan that has 32mm depth, 2500rpm and is optimized for high pressure. Makes no difference whatsoever... plus we know it works even with the slow Noctua fan, because DagoDuck tested it.
Also the temps are just fine, condenser inlet 48C outlet 31C under load (that's with the Zalman).
Also if you would take a look at Vapors fan roundup you would notice that the Zalman ZM-F3 pushes as much air-per-rpm through a radiator/condenser as the San Ace 1011 38mm fan. The problem is NOT insufficient airflow.

[[XC] 2long4u]

Just trim a few inches off the cap tube. Sounds like its close.

[teyber]

maybe push/pull fans on condenser?

[jcool]

Doesn't fit. But like I said, its almost certainly not a heat issue.

[killermiller]

Also the temps are just fine, condenser inlet 48C outlet 31C under load (that's with the Zalman).

@ what pressure?

Needs to be around 232.93 psi or 16.06 bar to have adequate subcooling.

Enough is a relative term.

[jinu117]

#1. Make sure front panel is open while running prime small FFT... for air flow reason. While front cover is great for letting air in, it adds quite a bit of restriction in that case.
#2. If fan on back can't accomodate amount of air fan in condenser will pump out... it will be limited by fan in back most likely in this case.
#3. Check what ambient temp the unit was tested vs. your operational temp. If ambient temp was like in 10c while tuning for 240w, you will get less capacity during 25c ambient temp usage.
#4. Instead of stressing all 4 cores at same time, try this... 2 cores first, wait till things stablizies and than add other core one at a time while waiting.
Depeneding on tuning done, it might take bit of "warm up" time for getting to capacity.

Hope this helps.

[jcool]

Thanks for the input, all of you.

#1. Make sure front panel is open while running prime small FFT... for air flow reason. While front cover is great for letting air in, it adds quite a bit of restriction in that case.

Was opened during all times

#2. If fan on back can't accomodate amount of air fan in condenser will pump out... it will be limited by fan in back most likely in this case.

I have a 2500rpm 92mm fan in the back that pushes a hell of a lot air out of the case. Like I said, it's like a windchannel in there, plus I also tested with open case. I don't think this could be the problem...

#3. Check what ambient temp the unit was tested vs. your operational temp. If ambient temp was like in 10c while tuning for 240w, you will get less capacity during 25c ambient temp usage.

I don't know the ambient where it was tested, but surely not 10C. I'll ask DagoDuck about this though. I have tested with 22C room temp.

#4. Instead of stressing all 4 cores at same time, try this... 2 cores first, wait till things stablizies and than add other core one at a time while waiting.
Depeneding on tuning done, it might take bit of "warm up" time for getting to capacity.

If I stress only 2 cores, it won't really move... just holding steady at -39C (instantly, doesn't need any time to stabilize).
If I put heavy load on all 4 cores above a certain Vcore temp also starts to rise instantly. 1 Mi8nute of prime smallFFT above 1,4V and I'm at -28C. Another minute and I'm at -15 and so on. Relly it starts as soon as I hit the prime button and it never stops.
It's even more drastic when linpack is used... I think I got a crash and -11C after 40 seconds there

Also the unit is running 24/7 for days now, so I'd think that's enough "warming up". Maybe I'll shut it off for a while, let it cool down and try again?

Somehow I really don't feel like trearing my rig apart just now...
[/QUOTE]

[killermiller]

Also the temps are just fine, condenser inlet 48C outlet 31C under load (that's with the Zalman).

@ what pressure?

Needs to be around 232.93 psi or 16.06 bar to have adequate subcooling.

Enough is a relative term.

[jcool]

I don't know about the pressure, since I have no means of measuring it.

[Fr3akyPete]

Hey jcool!
How is your singlestage performing?
And how loud are the fans?

[DagoDuck]

Hey Fr3akyPete,

there are still no updates, the unit will be sent back soon for the last modifications so that the problem can be solved. However, I also already have an assumption.

[DagoDuck]

OK, here we go. Refilled and tested under load, have to tune it a little bit more, especially for higher loads, capillary tube has to be changed. I'm very content with the new refrigerant. The pressures are much better. I'll keep you posted.

[PhilippF]

What refrigerant did you put in this time?


Regards,

Philipp

[DagoDuck]

R290, does its job very well IMO.

[DagoDuck]

Today I have continued, changed the capillary tube, added a SLHX. SLHX is really nice, almost no liquid floodback. Unit isn't completely insulated. I think I have found the perfect length of the capillary tube.

>200 watts:

12,8 bar(g) comp disch
0,2 bar(g) comp suct
-37,0°C evap

Idle:

11,5 bar(g) comp disch
0,05 bar(g) comp suct
-47,5°C evap

I even made a video for this. It's about 45 megabytes, sorry for that size.

http://www.fmkonzept.de/images/refri..._PC_201_SS.avi

Really happy with the unit now.

Unit will be shipped during next week. Looking forward to images with his beautiful rig!

Regards,
DagoDuck

[Jon Boy Deluxe]

I want one! Really clean work

It seems quieter on the video than I imagined!

[jcool]

Yeah, it must be the quietest SS unit out there, still seems horribly loud to me xD
DagoDuck, could you check your email inbox

[Moc]

Lol? Why should it be the quietest SS out there?

[jcool]

'Cause there is no quieter compressor than the NL11F? At least not in that W-range... and the NL11F still is by far the löoudest part of the whole unit, even though I used thick noise absorption mats around it.

[Moc]

Oh man of course your the only one with an NL11F unit ....

[jcool]

No I am not of course.. lol
All I am saying is that my type of SS unit (NL11F internal with noise isolated case) is about the quietest there is in the phase change world (or so I have been told)
Which is still horribly loud for my taste, not really gettin used to it :/

[Fr3akyPete]

No I am not of course.. lol
All I am saying is that my type of SS unit (NL11F internal with noise isolated case) is about the quietest there is in the phase change world (or so I have been told)
Which is still horribly loud for my taste, not really gettin used to it :/

Did you put sound-dampening-mats inside the case?
If yes, what kind of mats exactly?