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  1. #1
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    Data center evaportive cooling

    I was working on a data center all of last week with indirect evaportive cooling. It works well, the units do have DX cooling for hot days but it is fairly small for the size of the units maybe 20 tons.



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  2. #2
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    Very "cool" stuff. Munters makes a unit called "Oasis" that does this. Are these them?

    In our neck o the woods, it is very dry, electricity is relatively cheap and so we have data centers building here like crazy.

  3. #3
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    Quote Originally Posted by Juan Madera View Post
    Very "cool" stuff. Munters makes a unit called "Oasis" that does this. Are these them?

    In our neck o the woods, it is very dry, electricity is relatively cheap and so we have data centers building here like crazy.
    Looks like it says "Munters" just under the door latch

  4. #4
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    Where does the cool water come from?


  5. #5
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    From passing over the tubes with the airflow thru them. Think of a cooling tower.
    If the outside dew-point is low the water can get " cold".
    Look at dew-points for the southwest high desert, even in the summer time.


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  6. #6
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    Thread Starter
    Quote Originally Posted by CHAINIK View Post
    Where does the cool water come from?
    Quote Originally Posted by Chev5372 View Post
    From passing over the tubes with the airflow thru them. Think of a cooling tower.
    If the outside dew-point is low the water can get " cold".
    Look at dew-points for the southwest high desert, even in the summer time.


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    Yes think of it as a closed loop cooling tower but instead of cooling water it is cooling air
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  7. #7
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    Thread Starter
    Quote Originally Posted by Juan Madera View Post
    Very "cool" stuff. Munters makes a unit called "Oasis" that does this. Are these them?

    In our neck o the woods, it is very dry, electricity is relatively cheap and so we have data centers building here like crazy.
    Yes they are Munters units, Same here very dry air and power is dirt cheap there are several hydro electric damns in the area.
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  8. #8
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    Pretty cool stuff. Amazing it works as well as it does with a plastic heat exchanger.
    https://www.youtube.com/watch?v=Sp7Aru39CsE

    The central/western Washington area data centers negotiated deals as low as 3 cents/KW for like 20 years from what I read...Northern NV is loading up too, but rates aren't that cheap...those arid climates that get cool in the winter are quite ideal.
    "How it can be considered "Open" is beyond me. Calling it "voyeur-ed" would be more accurate." pka LeroyMac, SkyIsBlue, fka Freddy-B, Mongo, IndyBlue
    BIG Government = More Dependents
    "Any 'standard' would be great if it didn't get bastardised by corporate self interest." MatrixTransform
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  10. #9
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    crab, that be the one!

    They are not very responsive to questions tho. Have sent several inquiries as I'd like to entertain their use at my facility, but alas...... never a reply. And comments are not open.

  11. #10
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    Excerpt from http://www.solaripedia.com/13/39/416...e_cooling.html

    Recuperative and regenerative evaporative cooling options are other methods to produce greater comfort using evaporative cooling. These techniques use the relatively cool air exhausted from the structure to improve the performance of the evaporative cooling device. Evaporatively cooled water reduces in temperature the ambient air in the heat exchanger without humidification as it enters the structure. The cool, dry air warms a few degrees as it passes through the structure and exits through the evaporative cooling device or a cooling structure. Since the exiting air is cool and dry, the wet bulb temperature is lower and the water produced by the evaporative cooling device is cooler than if ambient air were used. The rock bed heat exchanger and the evaporative cooling device could be combined into a single unit. If the rock bed is used to store heat in the winter, the cost effectiveness of the system is improved. NOTE: The psychometric chart should be used at all times to analyze the effect of changing air conditions in these systems. As a rule of thumb, pre-cooling the air ten degrees will cause a three degree decrease in the output temperatures of an evaporative air cooler. The improper use of this rule can lead to errors of judgment when analyzing the results of changing conditions. Because of the large volumes of air that are moved in an effective evaporative system, the ducts must be large and appropriately sized. Typically, evaporative cooler ducts are at least three times the cross-section area of ducts refrigeration; ducts should be laid out using the shortest route possible and a minimum of turns. Evaporative cooling has been shown to be an effective alternative to refrigerated air-conditioning throughout the desert regions of the southwest. The selection of the particular evaporative cooling techniques must be made carefully through analyzing the local climatic conditions. These cooling systems should be integrated into the design of the home and where possible, with the design of the solar heating system. By integrating these systems at the design stage, greater efficiencies and more attractive economics can be obtained.

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  13. #11
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    I think they're really busy. I have some contacts if your serious.

    Actually have a piece of their epx heat ex-changer material in my suit case from the factory tour I had in Aug...
    "How it can be considered "Open" is beyond me. Calling it "voyeur-ed" would be more accurate." pka LeroyMac, SkyIsBlue, fka Freddy-B, Mongo, IndyBlue
    BIG Government = More Dependents
    "Any 'standard' would be great if it didn't get bastardised by corporate self interest." MatrixTransform
    My 5 yr old son "Dad, Siri is not very smart when there's no internet."


  14. #12
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    On my home I have a Mastercool evap cooler. It's a two stage system where the first stage is water running down an exchange system similar to what I understand your describing.
    I'll try to discribe. There is a small fan on top of a box. Water is pumped to some wicking that acts as a evaporative medium. That cooled water runs down plastic ducts to the collection pan on the bottom to be pumped to the top again.
    The main fan, now on low speed, draws outside air over the plastic ducts,
    It would be easier to take a picture.
    When the RH is low the water in the exchanger can get quite cold. With the full evap sys running I have measured temps of 30 degF differential.
    The downside is the monsoon season kills the evap ability. I have measured RH once at .4% Ya that's point four. But that was an exceptional day. When RH rises to around 50% evaps start to not do well.
    There is a Facebook data center being built here in NM. I asked the SMW's BA if a set of plans were around but was told not yet. From what I know this type of equipment is going in here too.
    Buttwheat: If your equipment operates similar to my home unit the idea isn't new. Mastercool has offered this option for at least 30 years. Just interesting.
    BTW Data collection, or as called "the cloud" is a huge money maker and is being done by big bucks companies all over. The system is very handy. My nephew who does work with these systems told me if he is using two servers and needs more capacity it just takes a couple mouse clicks and he has it. His information could be on any number of servers in even different states. Curious.
    A question might be why big bucks are investing in data centers. My hunch is we know data is valuable. Collection is valuable and can be used or sold. All personal information will be available to any DC owner. What you buy, where you buy, all your internet habits.
    There used to be a question of how can anyone make money off the internet. Owning a dot com was a joke. No longer.
    Too much coffee.....
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  15. #13
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    Sounds similar. Keep in mind there's two different 'technologies'
    Old, as in way old is Direct Evaporative Cooling....old as mankind itself....wet a medium and air blowing across it creates a cooling affect. Cooling Tower, swamp cooler, sweating. Causing humidity change to medium shared with.

    Newer Indirect Evaporative Cooling...wet a medium and blow air across it then have some other medium flow through that previously cooled medium. Fluid Cooler or in this case the OASIS. Minimal humidity change to final medium.

    What I find interesting is plastic was such a poor conductor, but now it seems to be an acceptable means vs. metal, plus the added expansion contraction of plastic with the fine 'fins' helps break scale off vs. metals....
    "How it can be considered "Open" is beyond me. Calling it "voyeur-ed" would be more accurate." pka LeroyMac, SkyIsBlue, fka Freddy-B, Mongo, IndyBlue
    BIG Government = More Dependents
    "Any 'standard' would be great if it didn't get bastardised by corporate self interest." MatrixTransform
    My 5 yr old son "Dad, Siri is not very smart when there's no internet."


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