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First stage finished and under vacuuming!

https://i.ibb.co/WxPt6BM/IMG-20220108-225653.jpg

https://i.ibb.co/jb35XMj/IMG-20220108-225749.jpg

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https://i.ibb.co/Pr4S8Z0/IMG-20211118-222559-jpg-bea659b4b7ed299ca6b67498c62f027f.jpg

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https://i.ibb.co/BLWCdLw/IMG-20211104-234436-jpg-e97a14b7c05eb14d8ee7fd457d9461e4.jpg

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https://i.ibb.co/rdYg00H/IMG-20211030-223528-jpg-65c63aff212436301a536a051927d608.jpg

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After my first attempt decided to try a Cascade with reciprocating compressors for quiet operation.

Will consist of:

1st Stage

-Tecumseh-L'unite 34cc 1.5HP Compressor

- 3KW Condenser

https://i.ibb.co/dBgrr3X/image-id-2543897-png-57b5f27895260739039dcb52bee57572.png

https://i.ibb.co/0nTc08T/image-id-2544200-png-ed6349881d8a3511cd746261a279ae4f.png
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Some result with Cascade

https://i.ibb.co/d0jcQw1/image-id-2554018.png

https://i.ibb.co/1XjH8Ld/image-id-2542172.png
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Finally after 4 months of building the Cascade its time for some numbers!

https://i.ibb.co/KKqB30y/IMG-20210714-215004.jpg

https://i.ibb.co/G5ZKXz4/IMG-20210714-220836.jpg

First stage up and running, fully insulated!

https://i.ibb.co/PtYNC3c/IMG-20210703-181516.jpg

https://i.ibb.co/b15Z8xh/IMG-20210703-181718.jpg

Time has come, only filling the 2 stages with r404a and r1150 remains

https://i.ibb.co/q56dZy7/IMG-20210619-074612.jpg

https://i.ibb.co/y5GnjFT/IMG-20210628-000121.jpg
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Thanks, its a really compact cascade, a bit tricky to fit them all in 50x70cm base but I am used to work in limited space :) ( human abdomen )

Protective frame

https://i.ibb.co/qFxRrZ6/IMG-20210428-180526.jpg

https://i.ibb.co/5x5MYwG/IMG-20210428-180623.jpg

First stage is ready

https://i.ibb.co/wCVWYmr/IMG-20210417-231449.jpg

https://i.ibb.co/bXbDCpp/IMG-20210417-231948.jpg

Also progress to 2nd stage, waiting for evaporator.
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Thanks, I would like to have -115C idle/-100C Load @ 350-400w.

A little more progress

https://i.ibb.co/6n05g1h/IMG-20210408-190517.jpg

https://i.ibb.co/5WndPwS/IMG-20210408-190556.jpg

And...

Some electric components arrived

https://i.ibb.co/dLbBGxm/IMG-20210405-200158.jpg

https://i.ibb.co/C1qn6fs/IMG-20210405-200131.jpg

https://i.ibb.co/KxNPjtL/IMG-20210405-213952.jpg

Some progress

https://i.ibb.co/0Z7ns2q/IMG-20210404-222837.jpg

https://i.ibb.co/mS4xRSQ/IMG-20210404-222925.jpg

Its time for the next step in Phase Change cooling, so decided to build a 2 Stage Cascade.

It will consist of:

1st Stage

- Mitsubishi RE313VDMT Rotary 18k BTU/31.3cc
- 3KW Condenser...

Its a long time I finished it, but had no time testing it in action.

At slightly in vacuum it goes down to -28 without fan working, I have to tune it at load...

I recently revisited s775 and decided to build a tiny chipset SS

I used:

1/10hp 2.95cm? r134 Compressor
Condenser 21x17cm
Base plate 27x24cm
3m 0.8mm captube
1/4"discharge line...

Some aesthetic improvements!

All up and running

https://i.ibb.co/cymvzKL/IMG-20201213-220252.jpg

https://i.ibb.co/PZbG9Sq/IMG-20201213-220411.jpg
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R404a/r507 should used in an SS.

For -50C @ load you have to use a Rotary compressor as in the SS in first page

Thanks!

Its almost finished, only charge with r404a left.

https://i.ibb.co/7Gnkfgs/IMG-20201209-160443.jpg

https://i.ibb.co/M5P6ZNT/IMG-20201209-160404.jpg
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Adding gauges to the "small" SS

https://i.ibb.co/JdGYqJH/IMG-20201207-220542.jpg

https://i.ibb.co/vmTDGsx/IMG-20201207-220507.jpg

Its idle temperature

Some improvements, I add a 220v fan regulator due to low ambient temp.

https://i.ibb.co/GptfqrW/IMG-20201128-230220.jpg

https://i.ibb.co/ftM9tCZ/IMG-20201128-230435.jpg