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First build single stage (many images)

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makaka

Member
Joined
Jan 5, 2004
Location
home
let's start with a bit of pre history , i got my first Vapochill ls (from ebay ) back in 2005 year or so , it was badly broken after shipping , i took it to repair shop , they fixed a broken pipe and recharged with R404 . After getting home the unit worked but temp were poor and compressor would shut down randomly . then completely refused to start , took it back to repair , they said that the control unit was bad , i ordered a new one , after about a month i got it plugged to the system , and again same issue as before compressor shut down randomly and heating up a lot . i took it back to repair , this time they refused to accept it for repair . since i was a student at the time , i was almost out of cash trying to repair the unit , so i forgot about .
Now 15 y later i found the unit in my garage :D , so i said what the hell why not to fix it , i spent about 2 week in forums reading about how all this work , went ahead bought all necessary tool and started the repair .

I figured out that the unit still had a leak on it , this caused the compressor to overheat . This little bad boy was danfoss nf5.5clx i was able to start the unit and get it working normally but this S*** was very noisy . so i decided to swap it with a NL11F ( Thanks to Charles Wirth for double checking with me the model) .


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The compressor was used it cost about 25$


since i am planing to get load in the 200-300w range , i updated the condenser

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about 20$ , according to spec 15c delta T @ 700w

i noticed that the old accumulator has some debris inside that wan't be removed , so i decided to make a new one using an old filter drier .
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Also installed 2 king valve to later adjust capillary tube length easily (Thanks to aenigma for idea)
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Used remaining copper tube to make a small coil on the compressor outlet . Was really hard doing this by hand , require some huge grip strength :D .
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finally my new SS tube arrived
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Silver brazing to cooper

Now putting everything inside the small case
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Now finally i am allowed inside the house (wife allowed :D) to do remaining work . It was really cold out in the garage there was no heating :down:.

capilary tube install and deep vaccum , i used 3.2m of 1 mm .(so far maybe will tweak later .)
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i also used a hair dryer over the compressor and tubing to boil any remaining moisture when pulling vacuum .
system did hold the vacuum for 24h now we can start charging the R507 .


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first frost 🆙

insulation ,
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charging until 6c super heat .
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and finally :

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now finishing insulation :
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testing with p4 945 @ 5.2 ghz 1.6v , according to asus monitoring it is 220w (according to estimation from power meter 260w , and finally according to OuterVision? Power Supply Calculator 254w ) . i have a D820 i will test it later since it should be hotter .

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342w is the compressor power usage
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high side pressure under load
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lowside pressure under load


All those under load (200-250w):
decharge temp : 61c
condensing temp : 36c
HP : 260 psi
ambient temp : 26c
low side pressure : 0.7bar
evaporator temp : -28c
temp 6" from compressor : -14c
compressor temp : 40c (delta fan doing great job :D)

It was really fun time building the unit , some time it was a pain when i had some micro leak and then cap tube blockage , but with patience and learning everything's is possible .
 
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ATMINSIDE

Sim Racing Aficionado Co-Owner
Joined
Jun 28, 2012
Do you mind uploading the images to the forum instead of ibb? A lot of users have issues seeing images on that hosting site, myself included.
 
OP
makaka

makaka

Member
Joined
Jan 5, 2004
Location
home
Do you mind uploading the images to the forum instead of ibb?
Your wishes are order :).
Done

Now my first 6 ghz :D:clap::clap::clap: , it was first try . it can do more but i am more interested on testing the max load capacity of the unit .

20200212_204458.jpg


Not sure how much power it is , this is a D820 @ 4.4 Ghz with 1.76v :D (really crappy overclocker) , it should be in the 240-280w range .

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Cpu temp @ -13c after 20 min prime 95 load 🆙 .


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Evaporator temp -30c , section line temp (7.2c) sound like i almost reached the max cooling capacity with this capillary tube length .


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High side pressure almost 250 psi :D .

Will get my hand on QX6700 and do some testing , this cpu should reach 300w easily with some overclock .

update : system is even 1h + prime stable same temp remains
Untitled (1).png
 
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hokiealumnus

Water Cooled Moderator
Joined
Oct 14, 2007
That looks like a lot of fun. Great job rebuilding that one to be a very effective cooler!
 
OP
makaka

makaka

Member
Joined
Jan 5, 2004
Location
home
Nice build!!
Thanks
That looks like a lot of fun. Great job rebuilding that one to be a very effective cooler!
Thanks

Tomorrow already the QX6700 will arrive . and i will get finally a good idea about the cooling capacity . Also this s* is getting addictive , maybe i will work on adding another compressor on parallel , or make a small 250w cascade .
i tested today few E8400 , some crappy celeron's and a E5800 , result was under -25c cpu loaded (evaporator -4x C ) .
Untitled (2).png
 
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OP
makaka

makaka

Member
Joined
Jan 5, 2004
Location
home
Finally got the QX6700 :D

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well i can see why this processor is considered one of the hostest cpu , cpu temp already in the positive side but still less than 10c , delta T evaporator to cpu is huge , maybe i have to delid this processor later .
Evaporator temp rock solid so far -33c (6" from compressor temp already +8c), we should be in the 260w+ range (280-300w maybe).


I will post more image later after some more tests
 
OP
makaka

makaka

Member
Joined
Jan 5, 2004
Location
home
Well after few day playing with unit , i ended up with a leak , it was my fault since i decided to not braze the flexible extension line , i like the look of it clean without solder :D

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This was responsible for leak

Now since the wife is not home i can enjoy freedom of brazing in my room :D:D:D

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Now i run out of Azote the there was no way to test pressure . since this section is completely isolated from the system due to the two valves i used air and my bike air pump to pressurize this part :rolleyes:


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and it hold 100 psi fine for about 4-5 hour :D

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now fast cleaning the mess before the wife get home :D

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Success mission accomplished
 

MaddMutt

Member
Joined
Jan 12, 2015
Thank YOU :thup:
I have been looking at a SS and have a question. You can tune a SS to a specific heat load/watts??? What about the newer processors = same heat load?? -> The AMD FX-9xxx was rated @ 220w~250w at 5GHz BUT IIRC would go well over 300w when OCed. Does the contact plate on the IHS need to be larger for the current processors??
 
OP
makaka

makaka

Member
Joined
Jan 5, 2004
Location
home
Thank YOU :thup:
I have been looking at a SS and have a question. You can tune a SS to a specific heat load/watts??? What about the newer processors = same heat load?? -> The AMD FX-9xxx was rated @ 220w~250w at 5GHz BUT IIRC would go well over 300w when OCed. Does the contact plate on the IHS need to be larger for the current processors??
You can tune a SS to a specific heat load/watts???
Yes you can , with captube or cpev ,
What about the newer processors = same heat load??
Newer processor in general require less power . but if we talk 9900ks then with heavy overclock you can get in 300-350w range .

I can't talk about AMD TR , but for all other processor vapochill ls evaporator is quite large , it need to just cover the processor die .
 
OP
makaka

makaka

Member
Joined
Jan 5, 2004
Location
home
Some retro s478 overclock

I had about dozen p4 to play with , most cap out in the 3 ghz range except few one .
Evaporator temp (load) -40c , processor temp -33c .
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strongly enough this cpu can do super pi32 mb stable but adding 50 mhz or more and system freeze i think there is some limitation in the mobo northbridge
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I have to find another s478 motherboard this one burned out :D
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after full checking the was one dead mosfet in 12v line and 2 capacitor , i swapped them , the short cicuit went away , but now the motherboard start then stop instantly , so it require more trouble shooting or to the bin :D .
 
OP
makaka

makaka

Member
Joined
Jan 5, 2004
Location
home
more update , now the 2600k.
this cpu was at first under water with 4.8 ghz and 1.47v and about 70c load temp (stable) , overtime it degraded to 4.6 ghz and 1.47v and about 70c load temp .:D

5100.png
evaporator temp @ -34c

i did not notice a huge boost from subzero temp , at the same voltage 1.47v cpu was @ 4800 mhz stable but not more , but lower temperature allow more voltage so i boosted the voltage to 1.56v and was able to get stability at 5100 mhz .
the processor is poor overclocker moreover degraded and was not able to hit 5.1 ghz even when brand new , so i consider this a good result.

cpu temperature remain under 0 during stress test .
 
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MaddMutt

Member
Joined
Jan 12, 2015
Is there any thing I can do to make my Single Stage cooler better? (I'm not BASF :rofl:)
I will have to test some more but it looks like it's best with a 2c/4t CPU. The temp probe on the SS unit has ~ -32c but CB-15 with 5c/10t @5.0GHz will hit ~ 10c. The coldest/hottest core is 5c - 14c and this is with the i7-8700k de-lidded.

Thank You for your advice :)

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Here is a screen shot of the i7-8700k running CB-15 with all cores/threads. The temp probe from the head unit read -34c. I had a 2nd temp probe placed under the cold plate/on top of the CPU's PCB that read ~ 0.3c - 1.5c. As you can see in the picture, I have one core hitting 29c @ 5.0GHz and 35c @ 5.3GHz :-(
I have a EVGA z390 Dark that stops reading the CPU temp after it goes below 0c, so the CPU could be -10c or -100c and I would not know it :facepalm:

Is this damaging the SS Unit running/benching it like this?

OverHeat CB-15.png
 
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