[TRNSYS-users] Floor vs Ceiling when both active?

David BRADLEY d.bradley at tess-inc.com
Wed Dec 18 10:10:50 PST 2013

   I would have defined a single construction separating the airnode 
above from the airnode below (instead of defining two BOUNDARY 
surfaces). To get the surface temperature of the ceiling side of the 
construction, select the airnode that contains the ceiling when you are 
in the TRNBuild output manager. Change to "surface outputs" and select 
the TSI ntype (ntype17).

On 12/18/2013 11:25, Ajit Naik wrote:
> Hello All,
> I am modeling a single floor of multi-story building with an 
> in-ceiling radiant system. I have defined an active surface has a 
> carpet on the "floor" side and exposed concrete on the "ceiling" side.
> I naturally defined the ceiling of the airnode as an active surface, 
> but also defined the floor as an active surface as well to account for 
> the effects of the underlying level's radiant ceiling. Both the 
> ceiling and the floor of the airnode are defined as boundary surfaces 
> with a fixed temperature on the other side.
> Here's my problem -- I am interested in recording the airnode's 
> CEILING temperature (at the exposed concrete surface) -- but within 
> TRNBUILD the ceiling and floor both have identical surface areas and I 
> cannot tell which is which! The only differentiable marker I observe 
> is the surface type. Is there any simple way to find which of the two 
> surfaces is the Ceiling in this case?
> Thank you!!
> Ajit
> Ajit Naik
> Energy Engineer
> *dbHMS
> *303 W Erie Street, Suite 510
> Chicago, IL 60654
> p (312) 915-0557 x308
> f (312) 915-0558
> www.dbhms.com
> _______________________________________________
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Thermal Energy Systems Specialists, LLC
22 North Carroll Street - suite 370
Madison, WI  53703 USA

d.bradley at tess-inc.com


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