I have much larger condensing units :) and a few more of the one you see in the picture, im trying to build a smaller unit but if i cant reach my goal of -100c I will throw size out the window and bring the bad boys in :)

Brazing dual Plate heat exchangers right now :)

New camera has arrived and I will have much better pictures soon :)

Awesome, love to watch build logs unfold :)

Pictures update and progress on -100c NexGen Cascade
 

Hello everyone,

I have just brazed in the hand expansion valve, and plate heat exchangers :) I replaced the liquid line filter dryer and added 1 suction line accumulator (small) and one liquid line accumulator (small)
I pulled a vacuum down to 50microns and held for 2 hours to ensure no leaks in the system.
The 1st stage has been pressure tested the system to 500PSIG for 1hr
I have charged some R-507 Refrigerant gas into the system and will let it sit at a static 150LBS over the night (or weekend) to further test the 1st stage for any leaks.

Once the 1st stage is fully operational I will start work on the second stage.

* pics are with my new camera, look any better?

Looking Good V2!

+ +1

NexGen -100C Cascade 1st stage operational
 

today the fisrt stage became operational and is performing beautifully!

After making minor adjustments to the hand expansion valve and replacing some copper line set after the metering device and adding a service port after the metering device the system is able to fully operate :)

*I had an issue where the copper tubing between the expansion valve and the plate heat exchangers became clogged by silver braze.

the 1st stage has been vacuum tested and pressure tested with no leaks and filally charged with R-507.

here are some updated picstures of the build progress:

Just amazing :good:

damn travis that is sick!!

awesome dude. best part is seeing the frost on it for the first time! Nice handiwork too

off topic: your package will ship this afternoon :thumbsup: