Another single stage

[cold_ice]

Last week I got a cheap compressor from ebay, and so I decided to build another single stage. It's a L'unite R134a compressor, and I'll charge it with R290(propane). The tubing should be OK, I only have to braze it in, in the next days, when I have some time.
Will 3m of .8mm captube be Ok?
This phase change unit is much smaller than my last
What I've done today:
The compressor



Condenser



I made a loop for the discharge line









I'll use a cheap stainless steel line as a suction line



The ubend, hope this is ok




I really love my new torch, especially when I braze bigger copper pipes/blocks.
This is the smallest tip





Big tip

[Tonic]

What about condenser's cooling?

Nice torch, how much you paid?

[cold_ice]

I'll put in two 120mm fans, that should be enough.
The torch was ~80€, I got it from ebay, the original price is about 400€
btw: The evap will be selfmade, I have to look for copper blocks tomorrow.

[Aphex_Tom_9]

:thumbsup:

[blinky]

looks good

[reject]

AFAIK that captube is ok

[cold_ice]

Today I have some new pics. I'm almost finsished with brazing in the lines, only the line from the compressor to the condenser is missing. I'll to that tomorrow. I hope I have enough time to charge it on Monday or Tuesday

Making the evap



Brazing in the first cap of the evap



The finished evap with the stainless steel line brazed on



The cap tube is going trough the stainless steel line, it's exit is here



Only the tube from the compressor to the condensor isn't brazed in yet

[berkut]

I belive you might want to change your oil first, if you had POE inside (and its almost sure) it catched humidity for sure and turned in to a acid.

*edit*

i think you use too much oxygene

[Epsilon]

I agree with berkut about the oxygen

But with a small tip, the cone just is very short...

[cold_ice]

I belive you might want to change your oil first, if you had POE inside (and its almost sure) it catched humidity for sure and turned in to a acid.

*edit*

i think you use too much oxygene

The compressor was filled with nitrogen till today, I closed the dicharge pipe then (because it isn't brazed in yet).
Ok so the blue cone should be smaller? Thx

[kayl]

nice neat work.
like how ya did the capillary tube.
steel flex will be ok just may stretch over time.

[gclg2000]

nice. It is really grey though.

[dutchman.pt]

Very nice and clean work.

[cold_ice]

nice neat work.
like how ya did the capillary tube.
steel flex will be ok just may stretch over time.

Thx
Yes I know that this is not the "perfect" line, but it was relatively cheap.

thx gclg2000 and dutchman.pt

[Unseen]

can u explain a bit the structure of the evap? It looks good...

[Firefoxx]

Very nice work my friend, always nice to read your guiders etc.
:thumbsup:

[buffarilla]

good work

[cold_ice]

can u explain a bit the structure of the evap? It looks good...

I think ladarse had a similar evap, don't know it excatly. It's a very cheap evap, and it's not difficult to build it.

thx

[Unseen]

It's a very cheap evap, and it's not difficult to build it.

thats why i am interesting

[fatty]

Nice job let us know what temps you get with that beast

[reject]

there doesnt look to be a lot of surface area on the base centre?

[cold_ice]

Today I had some timne, so I charged her, here are some pics

The evap covered with ice


The suction line





The evap after some time




The whole rig






Suction line






And here the final temps from today, measured at the exit of the evap



Tommorow I'll insulate the whole system, I'll try to find the optimal chrage too

[ashapirox]

Nice

What I would suggest though is three caps instaed of 2 and make it more maze like inside by cutting slits not holes and three caps with forcing the refrigerent to go back for back forth back forth then into suction all with greater flow. It won't affect the temps but it will affect the cpu cooling and how much heat you can remove from the cpu. I would say that you can optimise that unit to do possibly -65+-5.

[wr0x2]

You have frost all the way up to your compressor, not good. That means that liquid is going back through your suction line into the compressor, and this can damage the compressor.

[Epsilon]

No, as long as the frost isn't on the compressor, everything is OK