Tyrou's Tri-Vap 402

[Tyrou]

Here is my last single stage, I made it for a guy on a french forum, he wanted to cool his whole rig, one cpu, and two 7800GTX in SLI, so I decided to make to separate systems, one for the cpu, and the other for both gpus...


The original goal was -45C on the cpu evap and -35 on both gpu evaps, with no load, no suspense here, we broke that

Compressors are 1/3HP, I also used cap tube on this one, and the systems are filled with R402A
GPU evaps are made with a CNC mill, what's nice is the whistle they produce when the R402 boils in them, that's how I tuned the dual evap...
The cpu evap is more classical, homemade, but quite efficient, and should hold a load easily.
Condenser was modded to receive the two systems and has 4 120mm fans on it. No shroud due to the lack of space...

The case is made out of MDF, I don't know if this can be called "wood", but it's great to absorb noise and vibrations. I painted it with a aluminium-looking spray, pictures are not looking good due to the shiny effect of this paint, actually, it's not as bad as it looks on the pics

Now, let's go for the pics :
































Temperatures (°C)

Cpu evap :







Gpu evaps :





Please keep in mind that's with no load, but I hope to get -40 loaded on the cpu evap, and -30 on the gpus.

Original thread here (Cooling-Masters.com - french forum) : http://www.cooling-masters.com/forum...=0#entry153757

[Shinuza]

WoOt my friend, another pretty nice system

[Xenogias]

pretty nice? That's amazing. I like the 2 gpu evaps 1 hose design. Are they rigid at that distance apart from each other or can you adjust them to differenct distances?

[MaRtIe]

amazing temps too, -50C for GPU

And nearly -70c for the cpu...

[C-BuZz]

nice & clean build there. Great temps to!

so you have 2 compressors sharing the 1 condenser?

C-BuZz

[MaRtIe]

i have seen your build somewhere else.. and not that forum you posted a link to here... but it had a picture of how you used 1 condensor for 2 stages

You cut into the condensor and brazed it so its actually 2 condensors right?

[Tyrou]

the gpu evaps are 6cm away from each other, but as I made a copper loop between them, it's adjustable, I'd say from 35 to 80mm...

the two compressors are sharing a condenser, but actually it's more like two condensers, I splitted the one I had in two separate circuits

martie, the system you must be takling about is my cascade, I cut a huge condenser in half, then re-brazed them together to make it more compact

For sure, it won't hold any load at -68, but I re-tuned it for a -40C loaded if everything goes well

[MaRtIe]

probably was

[Waus-mod]

Nice unit... 24/7 now is fun! haha great!

[gloatlizard]

my friend that's marvellous!
look how that this is compact

[Tyrou]

it measures 60*30*32 cm, that's quite compact, but heavy
this is made for a 24/7 use, so I turned the fans to make them blow on the compressors, I don't want them to overheat in that box

[Shinuza]

You think about everthing

[piotres]

Really nice work ...

Some questions :

1. Have You brazed the evaps in gas shield ?

2. That -68*c on cpu evap was in what vac ?

3. What is the compressors manufacterer and model ??

Regards
Peter

[Tyrou]

thanks piotr

brazed with CO2 as a shield gas, I don't have nitrogen anymore

that -68C was only for fun, according to a P/T chart, that should be somewhere near 0.2bar abs.

compressors are Zem/Electrolux, GL99AA model, 1/3HP