Single stage build. Old parts used (2023)

[ogblaz]

Hello all,

Wanted to build this for 10 years. Now the time has come and I made my first single stage. It is my first build but the compressor will be replaced with a rotary one from an old AC unit.
I bought a used ( compressor NJ 6220Z, condenser ) and got evaporator from a friend who made single stages and cascades almost 20 years ago.
It is charged with r404a gas (380Gr) the capillary tube is around 0.7mm (outside diameter 1.9mm).
It is working OK in idle around -46°C but on long loads goes up fast. I really don`t know how to tune it.
Suction pressure is -0.2 bar, discharge is 9 bar.
I only bench 775 socket ...
The total cost is less than 100€ .

Here are some pictures if you have some advice you can give it to me

EDIT: pictures does not work, link to hwbot
https://community.hwbot.org/topic/22...rts-used-2023/

Thanks, Blaz.

[ogblaz]

I put the thing under load (e2140 1.95V) and added 70g more gas(450g r404) and it hold load -46°C . Single core celerons and pentiums it doesn`t hold its too much I guess

Thanks

[ogblaz]

My second attempt

20ccm compressor for R410, not the best option but it was the cheapest I could find used. Bartx old design 44/50mm stepper on flex tube, 1mm captube 2.3m, some bling with gauges and sight glass. It is filled with R404a 520gr.

It preforms better than the first one but the compressor is bigger 2x, (10ccm vs 20) .

The most power I can get out of the socket on gear p5q3 q9650 is around 430W(load cinebench), the temp on the evaporator was -42°C .

Have fun, Blaz

[CoolBeans]

For some reason I can't open the pictures.
Edit: I reread your post again and I somehow missed the link. My mistake. That is a very clean build. Great first build

[ogblaz]

For some reason I can't open the pictures.
Edit: I reread your post again and I somehow missed the link. My mistake. That is a very clean build. Great first build

Thanks man! Sorry for the late reply

Blaz