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  1. #1
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    Unhappy how to calculate cooling time needed?



    I have a question like bellow:

    At the beginning, the room temperature and ambient temparature is the same, for example ( 35℃ DB, 70%RH), I want 27℃ DB, 60% inside finally.

    the given air conditioner is 10 Kw for example, the thermo transfer coeficient K is 2.4w/m2.c.

    let's say the room size is 3m*3m*3m

    how to calculate the necessary time?



  2. #2
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    Re: how to calculate cooling time needed?

    the time need is : cooling capacity /air volum*delta enthalpy if your cooling capaciy can balance the room heat load
    I hear...I forget;I see...I remember;I do...I understand

  3. #3
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    Re: how to calculate cooling time needed?

    Quote Originally Posted by Lc_shi
    the time need is : cooling capacity /air volum*delta enthalpy if your cooling capaciy can balance the room heat load
    most people will reply like this, but, don't forget, it is a dynamic process, the heat will tranfer from outside to the inside, and will become stronger and stronger with temperature decreasing.

  4. #4
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    Re: how to calculate cooling time needed?

    27143721,

    most people will reply like this, but, don't forget,
    Why ask the question if you already know the answer?

  5. #5
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    Re: how to calculate cooling time needed?

    Quote Originally Posted by US Iceman
    27143721,



    Why ask the question if you already know the answer?

    It's a test?

  6. #6
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    Re: how to calculate cooling time needed?

    The method also seems strangely familar to someone that you might know wambat.

  7. #7
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    Re: how to calculate cooling time needed?

    Quote Originally Posted by US Iceman
    27143721,



    Why ask the question if you already know the answer?
    I don't know exactly the answer, I only know what is the problem if not considering carefully.
    I think maybe some people know better.

    by the way, what's the meaning of "wambat"?

  8. #8
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    Re: how to calculate cooling time needed?

    27143721
    what you say is right,it's dynamical process but you can estimate it by easier method at many occasions. Of course if it's a precision lab,you need to carefully calculate it and have a test to confirm it finally.
    What I mentioned is only a clue for you; may be you can use some simulation program to run it

    regards
    LC
    I hear...I forget;I see...I remember;I do...I understand

  9. #9
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    Re: how to calculate cooling time needed?

    Quote Originally Posted by Lc_shi
    may be you can use some simulation program to run it

    regards
    LC
    Do you know the software name to simulate? I know one called Micro-Vissim, but I can't get it.

  10. #10
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    Re: how to calculate cooling time needed?

    coolpack is able to do this job. have a try
    I hear...I forget;I see...I remember;I do...I understand

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