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Thread: 2-Stager unit

  1. #26
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    Don't you like it painted?

    TXV is a Alco TI-SW with a TIO-01

    Today, I've prepared 1st stage succion line, and adjusted TXV outlet. Then I've brazed them to the HX along with 2nd stage liquid line side at the same time.

    Guess I'll be able to finish the work tomorrow and start testing.
    Best Regards,
    Xavier


    "I prefer to fly alone... when alone, I perform those little coups of audacity which amuse me..." Col. René Fonck (1894-1953), the Ace of Aces.

  2. #27
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    Brazing work is finished. It remains leak testing, wiring and insulating.









    Best Regards,
    Xavier


    "I prefer to fly alone... when alone, I perform those little coups of audacity which amuse me..." Col. René Fonck (1894-1953), the Ace of Aces.

  3. #28
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    Very nice :-)

  4. #29
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    1/2" Insulation? That all you've found you need?


    If you have a cooling question or concern feel free to contact me.

  5. #30
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    @Luke: Thx mate

    @n00b: I get several different insulation materials.

    Apparently there's no leak so I've started insulating. Did few tests with R290, and both stages look to work.















    Best Regards,
    Xavier


    "I prefer to fly alone... when alone, I perform those little coups of audacity which amuse me..." Col. René Fonck (1894-1953), the Ace of Aces.

  6. #31
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    very nice before, this has to be your cleanest unit yet mate, well done
    When you build you don’t much around do you

  7. #32
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    that is AMAZING!! Really quite clean. Even the insulation is done expertly. Hats off to you


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  8. #33
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    Very clean indeed.
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    Quote Originally Posted by killermiller View Post
    Those ccb's will die if you look at them wrong.

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  9. #34
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    very nice work mate, cant wait to see some results of the loads this unit can hold and temps, all i can say is very clean workmanship, well done on a good job.

  10. #35
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    Thank you so much guys

    Insulation isn't finished yet... BTW I couldn't resist to test 1st stage a bit.

    T1 = evap
    T2 = suction

    Difference between 2 temps is a bit high IMO; BTW TXV is to used with R404a instead of R290 and insulation is messy.





    Quick movie http://www.wideo.fr/video/iLyROoaftqXk.html...
    Best Regards,
    Xavier


    "I prefer to fly alone... when alone, I perform those little coups of audacity which amuse me..." Col. René Fonck (1894-1953), the Ace of Aces.

  11. #36
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    I've performed some tests with R290 into 1st stage and R1150 into the second one.

    2nd stage went down to -112C unloaded with CPEV almost shut... Not really good ATM.

    BTW insulation is still in its early stages and thus it might explains why the temp is so "hot".

    Anyway, dunno if the actual captube (2mm; 1.5m) is good or not to properly use the CPEV.
    Best Regards,
    Xavier


    "I prefer to fly alone... when alone, I perform those little coups of audacity which amuse me..." Col. René Fonck (1894-1953), the Ace of Aces.

  12. #37
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    Really nice unit my friend

    What was first stage temps when you run secoond stage compressor?

    Anyway, dunno if the actual captube (2mm; 1.5m) is good or not to properly use the CPEV.
    It is but you will have some fun with CPEV, before you will set it.

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  13. #38
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    what are the low side pressures on the cpev?


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  14. #39
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    Quote Originally Posted by LittleDevil View Post
    Really nice unit my friend

    What was first stage temps when you run secoond stage compressor?

    It is but you will have some fun with CPEV, before you will set it.

    Best Regards
    Thanks buddy

    First stage temps are very bad while 2nd stage has been running:

    About -50C HX input to -40C output... very unstable.

    Coldest temps so far were -67C HX inlet / -60C outlet unloaded. BTW the matter is, the TEV must be used with R404a and unfortunately, I've ran out of it. I only have some R290 ATM. I hardly need some R404a.

    Quote Originally Posted by TopherTony View Post
    what are the low side pressures on the cpev?
    Lowest one so far was 0.6bar.
    Last edited by before; 11-06-2007 at 11:38 AM.
    Best Regards,
    Xavier


    "I prefer to fly alone... when alone, I perform those little coups of audacity which amuse me..." Col. René Fonck (1894-1953), the Ace of Aces.

  15. #40
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    hé ben !!

    ça me trou le cul ton savoir faire xav !!!
    The Devil's Reject

  16. #41
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    CPEV is nothing more than mechanical device that reacts to pressure. I don't see why it can't be used with other refrigerants. I am using one now on mini-c and have no issues with 4 different gases I tried on it with vastly different properties. I presume you are using it on first stage?
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    Quote Originally Posted by killermiller View Post
    Those ccb's will die if you look at them wrong.

    heatware: jinu117

  17. #42
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    CPEV deals with pressures an viscosity. Both of them depend on the gas and the way the CPEV work will change

  18. #43
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    I'm shure he wants to write TXV....
    Quote Originally Posted by Xeon th MG Pony View Post
    ....and avoid being a total venting loser!

  19. #44
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    Quote Originally Posted by noobzed View Post
    hé ben !!

    ça me trou le cul ton savoir faire xav !!!
    Merci Seb

    Quote Originally Posted by Moc View Post
    I'm shure he wants to write TXV....
    RIGHT! Corrected...
    Best Regards,
    Xavier


    "I prefer to fly alone... when alone, I perform those little coups of audacity which amuse me..." Col. René Fonck (1894-1953), the Ace of Aces.

  20. #45
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    Wanna see how fast 2nd stage goes down?

    http://www.wideo.fr/video/iLyROoaft1Dr.html
    Best Regards,
    Xavier


    "I prefer to fly alone... when alone, I perform those little coups of audacity which amuse me..." Col. René Fonck (1894-1953), the Ace of Aces.

  21. #46
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    Heh, nice. Guess the load tuning for unit is quite good already (one thing I noticed about cascade 2nd stage, typically higher load handling machines pull down faster).
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    Quote Originally Posted by killermiller View Post
    Those ccb's will die if you look at them wrong.

    heatware: jinu117

  22. #47
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    Off course

  23. #48
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    Nice video!

    Managed to fix the first stage already?

  24. #49
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    Not yet I've ordered 2kg of R404a to Kaeltetechnik-Shop (cold_ice's shop). Hopefully, this refrigerant will fix the matter.
    Best Regards,
    Xavier


    "I prefer to fly alone... when alone, I perform those little coups of audacity which amuse me..." Col. René Fonck (1894-1953), the Ace of Aces.

  25. #50
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    I'm performing the very first tests over a clocked CPU. Not too much ATM because I've picked up the wrong E6850 Nevermind.

    Evaporating temp is -106.5C (0.86bar) during Spi32M at 500x9 @1.72v.

    Not bad, but not good enough. CPEV is at its lowest available pressure. I'll wait for the R404a first, but it might be interesting to add some 0.9mm captude.
    Best Regards,
    Xavier


    "I prefer to fly alone... when alone, I perform those little coups of audacity which amuse me..." Col. René Fonck (1894-1953), the Ace of Aces.

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