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  1. #1
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    Need Help in calculating hvac load of mcc room


    I need help in calculating hvac load of mcc room of 50ft * 36ft
    and total electric consumption is 1700kw



  2. #2
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    Re: Need Help in calculating hvac load of mcc room

    As “Energy cannot be created or destroyed, it can only be changed from one form to another.”

    If you got 1700kW of electricity entering then you have a heatload of 1700kW.


  3. #3
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    Re: Need Help in calculating hvac load of mcc room

    Sorry I forgot,
    This is in addition to any external loads on the room itself.


  4. #4
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    Re: Need Help in calculating hvac load of mcc room

    Shirley not Viking? is it not 10 to 20% of electrical load, unless all that 1700kw is going to a big heater in the roof?
    Mostly found in the southern part of this green and pleasant land.

  5. #5
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    Re: Need Help in calculating hvac load of mcc room

    Depends if it is "electric consumption" (as stated) which will in some form or another end up as heat somewhere or electrical supply which might include diversity and unused over capacity.

    An oldfashioned 100W filament lightbulb in a sealed bow will generate 100W of heat (when it is turned on)
    Heater, computer or lightbulb you can't fool old Einstein.

    BUT, what I sort of hint at above (maybe not clearly enough) is that the given load can not be for the control room. The 1700kW must be the power passing through the room and being feed to machinery elsewhere.
    If this power is going through perfect conductors then no cooling will be required. If there is transformers/contactors/relays/control modules and so on then it is their energy consumption together with resistance losses within the room that has to be considered for the heat load.


  6. #6
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    Re: Need Help in calculating hvac load of mcc room

    Ah i have stand under you now!! did think you were hinting at sommat. I contacted a transformer company as there was a substation which should be outdoors, ended up in an mcc room, they said only 10 to 20% of rating would be true heat rejection.

    al
    Mostly found in the southern part of this green and pleasant land.

  7. #7
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    Re: Need Help in calculating hvac load of mcc room

    i have calculated this
    20TR as total load

  8. #8
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    Re: Need Help in calculating hvac load of mcc room

    Quote Originally Posted by The Viking View Post
    Sorry I forgot,
    This is in addition to any external loads on the room itself.

    20TR is total load

  9. #9
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    Re: Need Help in calculating hvac load of mcc room

    i have calculated this
    20TR as total load

  10. #10
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    Re: Need Help in calculating hvac load of mcc room

    what did you consider the internal load to be?

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