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

[David BRADLEY]

Ajit,
   Got it. I thought for some reason that your two surfaces were 
back-to-back and made up a ceiling of one zone and the floor of the one 
above, not a floor and a ceiling in the same airnode.

   In any case, if you look in the airnode window and click on each of 
your "walls" you'll notice that there is a number listed in blue to the 
right of the "geosurf" field. This is a surface number indicator. When 
you then go into the output manager, and start selecting your surfaces, 
you'll notice those same numbers listed.
Best,
  David


On 12/18/2013 14:49, Ajit Naik wrote:
>
> Thanks David. I think I need a bit of clarification though:
>
> I am just modeling the one airnode representing my level (call it 
> level 5), and presuming that the imaginary levels 6 and 4 are at a 
> constant temp by designating both the floor and ceiling of floor 5 as 
> boundary constructions. There are no actual adjacent airnodes 
> representing level 6 or 4 present. However, I still wish to consider 
> the effect of level 4's radiant system on level 5 via the floor in 
> addition to the effect of level 5's radiant ceiling. When trying to 
> distinguish the floor from the ceiling here, I run into trouble.
>
> I thought about creating ideally conditioned "dummy" airnodes for 
> levels 6 & 4 and defining the radiant surfaces as adjacent 
> constructions to overcome this, but wanted to know if there's an 
> easier method of telling floor from ceiling with the model as-is.
>
> Thanks again!
>
> 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
>
> *From:*trnsys-users-bounces at cae.wisc.edu 
> [mailto:trnsys-users-bounces at cae.wisc.edu] *On Behalf Of *David BRADLEY
> *Sent:* Wednesday, December 18, 2013 12:11 PM
> *To:* TRNSYS users mailing list at the Solar Energy Lab, UW-Madison
> *Subject:* Re: [TRNSYS-users] Floor vs Ceiling when both active?
>
> Ajit,
>   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).
> Best,
>  David
>
> 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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>
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>
>
>
> -- 
> ***************************
> David BRADLEY
> Principal
> Thermal Energy Systems Specialists, LLC
> 22 North Carroll Street - suite 370
> Madison, WI  53703 USA
>   
> P:+1.608.274.2577
> F:+1.608.278.1475
> d.bradley at tess-inc.com  <mailto:d.bradley at tess-inc.com>
>   
> http://www.tess-inc.com
> http://www.trnsys.com
>
>
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-- 
***************************
David BRADLEY
Principal
Thermal Energy Systems Specialists, LLC
22 North Carroll Street - suite 370
Madison, WI  53703 USA

P:+1.608.274.2577
F:+1.608.278.1475
d.bradley at tess-inc.com

http://www.tess-inc.com
http://www.trnsys.com

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