What would it take to build a cryogenic cooler?

[Shingoshi]

yeah man if a hermetic compressor burns out it will destroy ever component in the system. with 4 compressors or w/e you are 4 times as likely to have that happen.

What about instead of using those rechi's you use those huge 1hp copeland compressors that are used in commercial cascades?

I've seen them for sale on Ebay. And they are powerful indeed. The problem is the voltage. I live in an apartment, and I don't think the management would rewire my unit for a new 230V line.

That's why I've been concentrating my efforts on what I can achieve with 115v instead. For people who live in Europe, 230v isn't a problem. But here in the States, you don't typically see that high voltage unless you're in an industrial zone. I've thought about attempting to run 230v. But that would require that I use the line from my oven to power this system. There are logistical issues with doing that. The least of which would be creating ~30' power cord with a locking lead into the computer case. I had been thinking the refrigerator had 230v. But it seems it runs on standard household current. So I don't know about the viability of the higher current.

But I did think about it...
Shingoshi

EDIT: I'm going to search Google and see if Copeland even makes a 115v compressor. If they do, then maybe I can find one, once I know the part numbers to look for.

EDIT: Ok. Here's a list of the Copeland 115v compressors that I've found. I'll list this in order from the largest to the smallest.
1.) KAAB-007E-CAA-800
2.) KAMB-007E-CAA-800
3.) KAGB-005E-IAA-800
4.) KAMB-007A-CAA-800
5.) KAAB-007A-IAA-800
6.) KAGB-005A-IAA-800
7.) KANB-005A-IAA-800

Clicking on any one of those links, will take you to the page where I got the data. You can see the refrigerants each model uses. If you want, tell me which refrigerant makes the most sense. The largest one of these uses R-404, which is the same as the Danfoss SC18CLX.2. I don't know how much larger that model is than the Danfoss. Because the Danfoss is pretty large itself, having a displacement of almost 18cc.