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  1. #1
    Join Date
    Sep 2014
    Location
    Russia
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    Using cooling tower BAC in hard winter



    Hello, sirs!
    ----------------------------------------------------------------------
    Input data:

    Сlothing manufacture. There is a nessesary in water cooling for machines.
    Two water circuit.

    Input water 40
    Output water 23
    Flow 75 cubic meter per hour

    Ambient condition (following state regulatory document) in winter

    temperature -31 d.C
    ----------------------------------------------------------------------
    Basic scheme based on using

    plate heat exchanger (water 40/23 / e-glycol 35% 10/17)
    chiller with shell and tube condensator
    dry cooler

    this scheme provides free-cooling option as air temp. fall below 5 d.C

    such decision requires large capital outlays, compared using air condenser.
    but low energy cunsumption in winter
    ----------------------------------------------------------------------

    BAC Baltimore suggest to use open cooling tower. Model VLT-E
    i asked BAC spec about winter operation and he told about heated sump,
    insulated pipes, inroom tank and fan frequency regulation

    I found options of such machine in BAC sites which allow to operate above -18
    but not below

    ----------------------------------------------------------------------
    i haven`t experience with open cooling tower and have doubts that this
    system will operate in -31 d.C or even -25

    will be thankful for any advise or сompleted experience

    sorry for my ENG



  2. #2
    Join Date
    Feb 2007
    Location
    UK
    Posts
    2,477
    Rep Power
    38

    Re: Using cooling tower BAC in hard winter

    OK,
    For what you propose to use I would say drain the cooling tower before the temperature get anywhere near freezing.
    However, have you considered a hybrid cooler?
    Like the Cabero range HERE.
    Correctly designed they will give plenty of free cooling, have a less complicated circuit than your design (no need for the heat exchanger) and run fully automatic on their own controls.


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