A pool wich refrigerants should we use.
R22 etc are with CO2 of course !!
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A pool wich refrigerants should we use.
R22 etc are with CO2 of course !!
Idk. I don't think I'd want to swim in a pool cooled by a Xtreme autocascade. ;)
You can't swim in ice :D :D
I'd have to say that only co2 should be used as the second stage refrigerant, but the first stage should be open as not everyone will want to use r290.
I don't recommend you use a higher pressure refrigerant then r290. (I think r404a and r507 are not suitable). I think the discharge pressure will just get too high! The CO2 will add a significant amount of pressure although it doesn't condense in your air-cooled condensor. If I'll build an autocascade I'll probably add butane to the propane to lower the pressure (depends on how high the discharge pressure will get).
well I was planning to use r22 as the first stage refrigerant. If you can't keep the hx at -30 or so the pressures for condensing the CO2 will be too high. I disagree and think that r404a and r507 can be used as low stage refrigerants. However, if I had it I would go for r414b (a drop in r12 replacement, -28c boiling point).