Fans for cooling

Discussion in 'Anything DIY Related' started by VicZA, 15 Jan 2014.

  1. VicZA

    VicZA

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    Hey all, if you have built a fan system to cool down your tank/sump, please can you share what type of fans u used and also the following:
    - where did you buy from
    - how many do you use
    - are they noisy
    - are they heavy on electricity
    - how effective are they in cooling down your DT temp

    Thanks
     
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  3. mandrin

    mandrin

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    Hey I got a 120 mm sunon 12v fan quite an works like a charm fan r56.00 ac 12v adapter r60.00
    Cools down 2 to 3 degrees I got mine from A 1 radio services in Dbn
     
  4. Mac75

    Mac75

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    2 x dymax w7 windy series. 12v, 2.2w and noise <35db. running in my sump drops temp from 28 to 24-25 and keeps it there with heater off and T5s on. abt 140 bucks each. you will need an atu cos it cools by surface evaporation. any of the sponsors will be able to get them for you.
     
  5. Pisces

    Pisces

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    I use a Safeway 15cm desk fan to great effect. Cost R99 at Clicks
     
  6. RiaanP

    RiaanP Moderator

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    2 Pc fans with bearings R65 each
    Transformer. R35
    From Communica

    Piece of eggcrate, out of my garage.

    Drop tank temp with just over 2 degrees. Impressive for a 1000L plus system. But RO usage up a lot.

    [​IMG]
     
  7. cknipe

    cknipe

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    120mm 220VAC industrial grade steel fan (put your fingers in there and you loose them). noisy, but one hell of a strong flow. temp drop by arround 8 to 10 degrees on really hot days, and even makes a teeny weeny but of surface motion on the water too :tt2: Controller and temp regulators working very well though, and the fan thankfully isn't on all the time.
     
  8. cknipe

    cknipe

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    FYI, but how bigger the water area you blow over, how more the temp will drop. My fan are on the side of my 1.5m tank, blowing so much that you actually feel the strong winds on the other side of the tank, i.e. full length of the tank gets air.

    Oh, and on a warm day, evaporation sits at about 10L.
     
  9. RiaanP

    RiaanP Moderator

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    My sump is 620mm wide, back to front. And 840 left to right. Other side the skimmer is in the way. Right hand side the return chamber water level is too low. Open sump, no cabinet.

    Surface area I got air blowing over is bigger than it looks like in the picture. Maybe even bigger than a lot of other sumps.
     
  10. VicZA

    VicZA Thread Starter

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    cool, thanks guys ... was thinking of putting two fans creating a draft in my enclosed sump and then maybe one or two blowing directly on water .... will start with the draft and see how it goes. Looking at using 2x200mm, 220VAC fans for this. one sucking air in (closest to outside window) and one blowing out (into kitchen). From ACDC.
     
  11. RiaanP

    RiaanP Moderator

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    NO

    open 220V things that close to the water.

    NOPE

    there is a reason why I went 12V
     
  12. VicZA

    VicZA Thread Starter

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    OK, will look for 12VDC or 24VDC then
     
  13. VicZA

    VicZA Thread Starter

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    I was wondering .... would it not be better to have the fans on the DT and not on the sump. If this was done neatly it would not look bad at all. My thinking is that the volume of water is larger so surface are is larger and hence better or more effective than evaporation at sump.

    Good ? Bad ? Better ? Worse ?

    Here are some pics of what I was envisioning. 4 fans placed between my two Vertex Illumilux LED lights.

    Any comments/suggestions ?

    Fans 01.jpg

    Fans 02.jpg
     
  14. Mac75

    Mac75

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    personal pref would be in my sump as i like my DT to have a clean as possible look. IMO cooling will be just about the same either way....
     
  15. regis

    regis

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    if you could have the fans in a box, with a pipe outlet leading to the sump surface, I find that the humidity in the sump area tends to destroy fans
     
  16. VicZA

    VicZA Thread Starter

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    well ... I have just done a quick experiment. I ran two fans on my sump for about 1-hour and there was no change in temperature. I then placed the same setup on the DT for about 30 mins and there were immediately two benefits ... temperature dropped by 0.5 degrees ... and the heatsinks (basically the entire body) of the Illumilux LEDs are MUCH cooler. Usually warm-hot to the touch, now just very luke warm.

    Think that answers my own question .....

    Here's the experiment on the DT:

    photo.JPG
     
  17. regis

    regis

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    seem good, you could mount them more to the back and angle them at the water so they blow accross the surface of the water.
     
  18. VicZA

    VicZA Thread Starter

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    Good point .... will play with a proper design. This was just an experiment. Was really happy with the cooling of the LEDs though ... that was an added bonus !!
     
  19. Stanley

    Stanley

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    Some Great Suggestions Would Try It On My T5 Light As Well Might Also Drop Some Degrees On That
     
  20. makharold

    makharold

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    Here r my fans cost me nothing lasercutting and powder coating was free from graft fans free from my bro and I had an old laptop charger lying around [​IMG]

    [​IMG]
     
  21. jclaas

    jclaas

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    What's the size of your sump?
     
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