diy 1000l chiller

Discussion in 'Anything DIY Related' started by brettb2020, 30 Jun 2009.

  1. brettb2020

    brettb2020

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    Iv been collecting parts for my diy chiller for about 2 months now. Iv have spent about 300 bucks on the stuff and since I have been working at gauche air in my past varsity holidays, I know alot about refrigeration and aircondition.

    for those who want to now how they work, its simple:

    any refrigeration setup consists of:
    1. a compressor, to compress refrigerent gas and create a vacuum.
    2. an evaporator coil, (the cold side) where the refrigeran evaporates.
    3. a condenser coil, (the hot side) where the refrigerant condenses.
    4. an expansion device. where the refrigerant changes from liquid to gas (evaporates) its just a really small hole.

    [​IMG]

    A. evaporator coil.
    B. compressor.
    C. expansion decive.
    And. the red part is the condenser coil.

    cycle:
    1. the compressor compresses the refrigerant into the condenser coil. when something gets compressed, it heats up. thus the condenser coil heats up. but a fan blows onto the condenser coil keeping it cool (explains the hot air coming out the chiller) and by the end of the condenser coil, the refrigerant as condensed into liquid.(dark blue).

    2. the liquid refrigerant then gets forced through the tiny hole of the expansion device. and because its going from a very high pressure to a very low pressure (because the compressor is sucking) and also due to your warm tank water. the refrigerent boils and vaporises, getting extremely cold and cooling your tank.

    3. it then gets compressed again and goes through the cycle.

    so here are some pics of what i have so far:

    titanium for the evaporator coil.

    [​IMG]

    condenser coil (the fan is off)

    [​IMG]

    compressor

    [​IMG]

    i am busy putting everything together and will update as i go along.
     
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  3. Mekaeel

    Mekaeel Moderator MASA Contributor

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    I need to come check this build out. You damn good at DIY Brett!
     
  4. Tovanco

    Tovanco

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    Hi Brett,

    Looking good. I assume the titanium coil will be placed in the sump or will you have a seperate cooling container. Where did you get the titanium pipe and what did it cost you?

    Regards,
    Tokkie.
     
  5. Tony

    Tony

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    Nice going there but from my experiences with fridges compressors go for about R4000-00. How did you get yours for so cheap?
     
  6. leslie hempel

    leslie hempel Moderator MASA Contributor

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    i will try post a pic of my old one worked like a charm on my old 4ft, never really did any calculations to see how feesable it was to run though..
     
  7. brettb2020

    brettb2020 Thread Starter

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    thanks you welcome anytime.


    thanks, ya im gonna put the titainium in an enclosure and have a pump circulating the water through it. the titanium a got from a pool heating company whos owner is very good friends with my boss and he organised it for free. had a hole, but was near the end so just cut it off. but value is about R1000.

    lol tony you got ripped off. a half horse power compressor for a double door fridge is about R450. yes you can get compressors for R4000, for huge cold rooms. you could can chill the sea with that :p

    awsome! a diy too? please post pics!
     
  8. brettb2020

    brettb2020 Thread Starter

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    update

    so today i put everything together. and OMG!!! it works like a charm. it chilled 10l of water from 60 deg to a solid block in about 10 mins. i worked it out and its capable of keeping about 950l of water at 26 deg no problem.

    here is a pic of the test setup. i still need to make a housing for the evaporator coil and a cover for the whole thing. for the test i just put the coil in 10l of water in a bucket.

    [​IMG]
     
  9. riyadhessa

    riyadhessa

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    brett wow glad it is working like a charm...
     
  10. Tony

    Tony

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    NIce work there. MAybe I'm just used to compressors for industrial kitchens. How does it cool the water, do you have to dip the coil in the water itself?
     
  11. lIghty

    lIghty

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    Looking good Mr DIY, also sound like a device that every home bar needs for cooling those warm beers:thumbup:
     
  12. Tovanco

    Tovanco

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    Hi Brett,

    What Hp compressor did you use? I have made a DIY chiller before and all I did was coat the copper avaporator coil with a plastic nylon dip coating. They dipped the coil twice to ensure there was no pinholes. I then placed the coil in the last compartment of my sump. I used a 1/4hp compressor and it was a 400l tank and it worked like a charm.

    Regards,
    Tokkie.
     
  13. Andreas

    Andreas

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    Nice build Brett;)Now to just build the casing and decide where to stick that coil in:whistling:
     
  14. shane

    shane

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    Great build Brett,
    How do you control the temp? Are you going to have some type of controller to switch the chiller off?
    Cheers
     
  15. leslie hempel

    leslie hempel Moderator MASA Contributor

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    yep it was DIY its over 10 years old and in a mates garage. still works though
     
  16. RUAN

    RUAN

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    cool diy man
     
  17. brettb2020

    brettb2020 Thread Starter

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    awsome! lets see some pics :)

    iv got a dixell chiller controller that i got lying around the workshop at work. its flippin awsome! got over 15 parameters that can be set, alarms and safety circuits.

    im not sure as the sticker was a bit worn but looking at the current it draws, its about a 3/4 hp. quite big, but when i get a bigger tank it sorted.

    thanks man:) its in the making :)
     
  18. Warr7207

    Warr7207

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    Does this heat the tank as well ?
     
  19. brettb2020

    brettb2020 Thread Starter

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    it doesnt. but my next one will definitely heat as well. its as simple as adding a 4way solenoid to change the direction of refrigerant to the evaporator, the condenser and vice versa. reason why i didnt do this now is that the controller i got for free doesnt do heating.
     
  20. riyadhessa

    riyadhessa

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    brettb so you the new DIY guru...
     
  21. brettb2020

    brettb2020 Thread Starter

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    haha! not officially lol, just need the lil tag below my name. :razz:
     
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