Morphing Air Conditioner into Autocascade System

[mytekcontrols]

Although I can't reveal the exact details on this project, never the less I thought you guys might like to see my new Heat Exchanger Stack aimed at producing -150C or colder.

The photo below shows the "layered" approach being used in this latest autocascade design, yielding over all dimensions of 10.5" high x 6.5" footprint. And of course there are all kinds of goodies stuffed down the center (no wasted space in this baby ).

Outer coil is 5/16" od inside of 1/2" od, inner coils are 3/16" od inside of 3/8" od.

The inner coil is broken in a few spots for insertion of tees (not visible -- on back side), and was wound in one operation following brazing of these parts.

The bullet strainer shown, is feeding both the final and subcooler captubes (yes the final part of the 3/8" coil winding is the subcooler).

[berkut]

That's a really mean machine you're building there.

I love the heat exchangers, would you be willing to share with us the technique you use to coil them so neatly ? Or is it just the fact you're 50cm around the fore arm and 80 cm biceps ?

When i made mine there was no way i could make them look as good as yours. Coiling them in a flat disc was the only option to make them look neat.