Odd peak cooling day

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I don't know where I've gone wrong, but my peak cooling day is happening in December. The output is saying that there is a huge internal heat load from occupants on that day. As far as I can tell the occupant schedule is correct. Any insight into this is appreciated.

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Travis Rhodes's picture
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I see that this is the peak load for a single space which is a core space. Does this space have any exterior walls, and is there a 2nd floor above this space. If its an interior area the outside weather conditions shouldn't have any effect on the cooling load for this space.

Charles Land's picture
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Are you willing to send us your .inp and .pd2 files?

Carol

cmg750's picture
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Oh, wow!

Thanks Charles - you helped me see a broader perspective... I've often
run into space reports with seemingly odd dates for peak
heating/cooling, considering only the time of year and relative outside
conditions - it totally makes sense that for core zones that's a twisted
view!

~Nick

NICK CATON, E.I.T.

Nick-Caton's picture
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I accidentally sent this to Carol only, but if anyone else wants to take a look at it that would be appreciated.

Travis Rhodes's picture
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Travis,

I'm not sure what standard you are modeling to but I've never seen one that
allows you to set 5 foot perimeters; not sure why you would want to either.
So, just about all of your people, lighting, equipment, etc., are there in
the core space.

Try a 15 foot perimeter and see if that helps.

Carol

cmg750's picture
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Travis

With a 157' x 157' floor plate and a 12'-0" floor to floor height, you have
tipped your internal-external gain scale, heavily on the internal gain side!

Beyond load implications the building will provide no access to views or
daylight for most of its occupants.

Now if this is actually a cross-section of a tower you are simulating, than
you will want to make sure the first level does not have ground exposure and
the top and bottom slabs of the model are thermally inert.

NYCCTgreen's picture
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Here is the layout of the first floor, the second is nearly identical. The dashed lines on the perimeter are the diffusers for the two perimeter AC units per floor.

Travis Rhodes's picture
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