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Thread: Cooling Load

  1. #1
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    Cooling Load



    I am designing a HVAC system for a location off the coast of Nigeria.

    Along with the AHU there is chiller system which I am trying to size.

    To calculate the cooling load can I simply use the volume airflow multiplied by the density of air and the delta T? Or do I have to use the equation:

    Qc = ma(ho hs)

    My problem with the later method is whilst I have the db and wb of the outside conditions i only have the db of the supply conditions so pinning down the process line of the psychrometric chart is difficult.

    Would an acceptable solution be to estimate the %RH for the supply conditions?

    Any advice would be appreciated.



  2. #2
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    Re: Cooling Load

    do you have a cooling load for the space already?

  3. #3
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    Re: Cooling Load

    Well i have calculated it using the air flow, air density and delta T but i dont think that is correct???

    Is that a correct assumption

  4. #4
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    Re: Cooling Load

    Hi Chris, yes that is how I would do it.

    Q= m x cp x DT
    The difference between genius and stupidity is that genius has its limits.

    Marc

  5. #5
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    Re: Cooling Load

    Thanks Marc,

    I was not sure if i should be using the enthalpies.

    Really appreciated.

    Regards

    Chris

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