Best refrigerant for a small compressor.

[<Wouter>]

Hey ppl!

I'm planning on building a direct-die phasechange for my gpu. It is going to be a school project. I have a 80w compressor and a condensor from a refrigirator. The idea is to keep it as cheap as possible. The compressor originally had r12 in it. What would be the best refrigirant for this compressor? I was thinking about r290, but i'm not sure about the extra stress it is going to add to my compressor. Also what temps could i expect @80w heatload?

[Unknown_road]

r290 will do just fine in a r12 compressor. with a 80watt compressor you should't expect to much of it. I would think around -15...

[<Wouter>]

-15 is nice.

[the_new_guy]

r134a, but you will have change oil from mineral to poe

[Unknown_road]

that's why r290 would be a better choice.

[sandman]

Or just add some R290 to the R134A. Depending on the compressor, changing the oil might not be a bad idea anyway.

[<Wouter>]

How much does changing the oil cost?

[Unknown_road]

since your in the Netherlands you can't get r134a without a license. and poe oil isn't that easy to obtain as well. Just use r290, make sure you vacuum the system properly.

[piotres]

R402a will be the best

but R290 will be good also ..R22 too .

Charging that R12 comp with R134a is a nonsense I think ...you must change the oil to POE - that oil is quite expensive...and you need at least 1 litre of it, because you must do oil rinse with POE .

@Sandman : R134a or R404a just "kill" the mineral oil and R290 won't help .

Peter