2 Compressors In A Single Stage?

[Shingoshi]

That'd be series, but I'd imagine you'd burn the compressor in front out with the hot discharge from the one doing most of the compressing, and you'd manage a lower low side pressure.

If you put a heat-exchanger between the two compressors, heat won't be an issue. But then I would have two HX. One after the second, and the other between them. If you really want to get overly dramatic, depending on which refrigerant you're using, you could put one before the first compressor as well.

Then I would suggest connecting the heat-exchangers in series from the processor back to the condenser. That way you're progressively cooling them in order from the coldest to the warmest refrigerant in line.

I'll have to read the rest of this now to see what anyone has said about oil management. Because with two compressors, you need to distribute the oil evenly between the two.

EDIT: You should see the new Sanyo two-stage compressors in one unit! Search google for them. I believe there are other companies now making them as well.

Shingoshi