[Equest-users] [Bldg-sim] why the autosized design air flow rate differ so much in different floor?

James Hansen JHANSEN at ghtltd.com
Sun Feb 26 04:42:21 PST 2012


It's almost surely your first floor slab.  The default configuration and U-value for these constructions are usually very poor.

-James

On Feb 26, 2012, at 7:31 AM, "韩星" <foolishstar at 163.com> wrote:

> Hi, every body,
> 
> I now have a difficult problem. I found that the autosized design air flow in the first floor is much larger than the second floor, about 5-10 times of the second floor. I cannot figure out the reason, because the indoor lighting, equipment power and the occupant density are all the same for the two floors.
> In my opinion, the second floor should have a higher air-conditioning load than the first floor because it is the building's top floor. But the result is just the opposite.
> I really want to know the reason and how I should deal with it.
> Thanks
> Xing
> 
> 
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