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  1. #1
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    Cooling tower piping design


    Context:
    Rectangular cross-flow cooling towers of about 200RT per fan, for water cooled chillers for commercial air-conditioning in a tropical climate.

    Some cross-flow cooling towers have piping arranged like in attached photo - incoming warm water pipe is submerged for a considerable length in the bottom basin, which seems sub-optimal.

    How much impact do you think this has on efficiency?

    I imagine there is a formula for estimating the heat flow from warm water thru a given area of PVC pipe into cooler water. Any pointers?
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  2. #2
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    Smile Re: Cooling tower piping design

    hellow every one i am magdy akl from egypt my work mainly related to cooling towers and fans
    i work as advisor or cnsultant for sme contractors in my area.

  3. #3
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    Re: Cooling tower piping design

    did some one gave you any comment on this i wany to see it ?

  4. #4
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    Re: Cooling tower piping design

    Quote Originally Posted by kaon View Post
    How much impact do you think this has on efficiency?
    Very little I would imagine, although I could be wrong

    If it had a major impact on performance then it would not have been designed/built that way.

    Do you have the make/model details?
    Brian - Torquay, Devon, UK
    I have to stop saying "how stupid can you be?" to my co-workers.
    They're starting to take it as a challenge...

    BASIC MAINTENANCE. If it doesn't move and it should then use WD40. If it moves but it shouldn't then use Duct Tape.

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    Re: Cooling tower piping design

    Quote Originally Posted by magdy akl View Post
    did some one gave you any comment on this i wany to see it ?
    Could you not provide some useful information in reply??
    Brian - Torquay, Devon, UK
    I have to stop saying "how stupid can you be?" to my co-workers.
    They're starting to take it as a challenge...

    BASIC MAINTENANCE. If it doesn't move and it should then use WD40. If it moves but it shouldn't then use Duct Tape.

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    Re: Cooling tower piping design

    Quote Originally Posted by Brian_UK View Post
    Very little I would imagine, although I could be wrong

    If it had a major impact on performance then it would not have been designed/built that way.

    Do you have the make/model details?
    The photo is from a no-name tower, it is newly assembled, not in use yet.

    My sites have a few other cross flow towers of various makes.
    And I noticed that the Shinwa's have minimal submerged length, about 6 inches of vertical riser.

    And yet a no-name seemingly under-performing tower has lots of submerged horizontal runs. Sticking a thermometer probe into the basin at various points showed more than 1 degree C rise near the pipes.
    A probe stuck into drips in the infill from outside might read 25C while a probe stuck in the basin might read 27C. I want to measure the temperature of water that is just dripping into the basin, I would need to be inside the CT while it is running, and use a little cup...

  7. #7
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    Re: Cooling tower piping design

    looks to me like it's piped backwards
    look here to see how a cross flow is normally piped
    http://en.wikipedia.org/wiki/Cooling_tower#HVAC

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