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Thread: My 2nd mini-cascade - 2x MP14 FB

  1. #1
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    Red face My 2nd mini-cascade - 2x MP14 FB

    As my original thread went to hell with the last data loss here at XS, I am reposting it (thanks to google's cache)

    Components:
    High stage:
    - compressor: reciprocal ACC MP14FB (1/2HP)
    - condenser: Empor 1.21kW + 16W 220Vac motor + 250mm fan
    - filter/drier: Danfoss 60g
    - refrigerant: R-507
    - metering device: Alco TIS-SW thermostatic-expansion valve + 00 nozzle

    Cascade HX:
    - 12-plate stainless-steel HX

    Low stage:
    - compressor: reciprocal ACC MP14FB (1/2HP)
    - desuperheater: Empor 0.21kW + 19W 220Vac 120x38mm fan
    - oil separator: Denaline (non-floated) + Castel ball-valve for regulating oil return
    - filter/drier: Danfoss 30g
    - refrigerant: R-1150 - Ethen/ethylene
    - metering device: TC-31 (0.031" ~ 0.8mm) cap tube
    - expansion tank: Fach 1.6L reciever - modded
    - 0.6m + 0.6m = 1.2m suction line
    - evaporator: Dimastech V5 --- i used my own Maze GT1 evap lineset

    Safety:
    - Alco HP @ 25bar (low stage)
    - 2x HP pressure gauge Wigam
    - expasion tank 1.6L (low stage) --- not incorporated in finished unit
    - HS-LS bypass

    Building the case - backbone of this cascade:


    The Dimastech V5 evaporator lineset i got from OC-bay for ~ 80€ brazed & shipped:


    Essential goodies:


    The heat-exchanging system:



    Building the high-stage & initial charging it:



    Mr. Frost visits the cascade HX


    Completing the low-stage, only few connections are left to be done:


    Brazed cascade:


    Low stage is leak-free and charged with R-410A for the testing purposes, need to the wire the low stage compressor today though.

    Best Regards,
    Niko

  2. #2
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    very very nice i like it
    I LOVE LAMP!

  3. #3
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    I like the way everything is held together with cable ties
    Quote Originally Posted by jimmyz View Post
    sorry to hear about the dead cards, but.. If stuff ain't dieing, you aren't trying.

    נְפִילִים

  4. #4
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    tiborrr very nice build

    i like the frame you constructed to mount all the parts

    are you going to line the hx box with neoprene or expanding foam?
    1. The first rule of Bench Club is, you do not talk about Bench Club
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    8. If this is your first night at Bench Club, you have to Bench

  5. #5
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    Looks a very tidy build well done

  6. #6
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    Where do you guys get all these awesome condensors/fans and shrouds?
    Last edited by sdumper; 05-01-2009 at 12:35 PM.
    Never empower an idiot with a response....

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  7. #7
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    Quote Originally Posted by sdumper View Post
    Where do you guys get all this awesome condensors/fans and shrouds?
    these are just normal shop bought items in most of the EU

    have a look here @ cold_ice shop i think he will ship to the USA

    http://www.kaeltetechnik-shop.at/First-page


    if its not in English there is a tab at the top right to select english
    1. The first rule of Bench Club is, you do not talk about Bench Club
    2. The second rule of Bench Club is, you do not talk about Bench Club
    3. If someone says stop, goes limp, taps out, the the benching is over
    4. No bummers in the batcave, apart from unkie dave
    5. One Bench at a time
    6. No air, no water
    7. Benching will go on as long as they have to
    8. If this is your first night at Bench Club, you have to Bench

  8. #8
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    Thanks guys!

    My short vacation just ended today, tommorrow I'll start the second stage to see if it operates normally
    @bazx: I'll fill the HX box with expanding polyurethane foam. I'll wrap the whole HX box into clear foil (normally used to pack food) and then fill the bottom of the HX box through the 'straw'. Foil will at keep the shape so the foam will expand upwards. The leftovers of this expanding foam will be cut with scalpel.

  9. #9
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    That compressors and layout of this unit remind me a bit old Sharp's unit .

    How bypass will be working ? (I mean by what components You build it)

    Keep going

  10. #10
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    Thanks for your kind words, Peter. About resemblence to sharp's cascade - hehe, not really, old sharp's cascade looked like a long coffin and it's single level, this one is two stories high, hehe :P My first cascade resembled more to old sharp's than this one.

    Bypass will work via oil return from non-floated oil separator + ball valve directly to compressor suction port. Proven method, it goes down to ~ -55°C fairly fast.

    I have tested the second stage with R410A, it does about -65°C uninsullated, HP ~ 3bar, LP deep vacuum :P. The heat exchanger was uninsulated, R410A was condensing at about -30°C (need to insulate the TXV bulb too). Will charge R-1150 this weekend if everything goes okay

    Best Regards,
    N.

  11. #11
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    Cascade already working for the testing purposes, by the time being on R-410A, where she does -72.5°C to -73°C, uninsulated

    1st stage - R-507:
    HP: 11barg
    LP: 0.3barg
    static: 8bar

    2nd stage - R-410A:
    HP: 3bar
    LP: deeeeeep vacuum
    static: 9bar


  12. #12
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    I got rid of the SLHX on the 2nd stage, test charged the second stage with CO2 + R-410A (dry ice flushing agent / oil carrier), properly charged she does -80°C without load, with Phenom II @ 4.75GHz around -65°C.

    Hi-stage (R-507) HP: 12.5bar
    Low-stage (R-744 + R-410A) HP: 8bar



    Did some initial testing:

    SuperPI 32M: 14m 32.875s


    PiFast: 22.58s


    And also some 3D:



    3DMark2001SE: 30.836


    3DMark2003: 9.462


    Will charge ethylene, properly insulate (hell, even CO2 is breaking through this thin layer of armaflex) this weekend and report back!

    Best Regards,
    Niko

  13. #13
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    I really like you mini cascade.I mean you did a very clean job + with proper insulation will give you better results.
    So,again nice work

  14. #14
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    Thank you crio! Ethylene should give a nice boost to this poor clocker of mine, 5GHz Pi32M should be possible!

  15. #15
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    Quote Originally Posted by crio View Post
    I really like you mini cascade.I mean you did a very clean job + with proper insulation will give you better results.
    So,again nice work
    I second that Tiborrr does class "a" work!!
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  16. #16
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    love it, and i really like the color. I got runmc making me up a SS with similar colors. Cascades always give me green eyes (envious), so the green color works great

  17. #17
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    Thanks sdumper & lesstutrey!

    I - again - did some modification to the cooling machine. I repiped the suction with a big U-turn which help preventing refrigerant floodback at idle. I have also improved my temperatures a bit, i'm now at -70°C with the same load as before. So the ethylene will wait for another week, for the sake of this performance improvement job:





    I have also started work on my new project - the single-stage auto-cascade - and made a phase separator:


    Best Regards,
    Niko

  18. #18
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    Cascade #2 @ -100°C





    CPU evaporator | High-stage (R-507) | Low-stage (R-1150)

  19. #19
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    Maiden voyage for this machine on R-1150: http://www.xtremesystems.org/forums/...4&postcount=31

    Best Regards,
    Niko

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