[TRNSYS-users] Internal wall modelling

[Loïc Frayssinet]

Dear all,

I was wondering if it is similar to model an internal wall as a wall :

(a) with the category 'internal' or
(b) with the category 'boundary' and the boundary condition 'identical'

I noticed that the first option implies to consider the total exposed 
surface (both sides) for the area parameter, unlike the second one. I 
guess that in (a) the middle of the wall is assumed adiabatic in order 
to model only a half wall but with an area 2 times higher. If this is 
correct, it is implicitly assumed that the internal wall composition is 
symetric. By the way, I found that the wall balance is not null otherwise.

Is the (a) modelling really only concern symetric composition?

Nonetheless, when I compare (a) with a 2*S area and (b) with a S area, 
for a symetric composition, the results are not exactly the same. I 
succeed having same results by setting the composition of (a) with only 
the half of it (from a face to the middle).

So, the (a) modelling need half composition? If yes, why non-symetric 
compositions causes balance divergences?

Regards,


-- 
*Loïc FRAYSSINET *

-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.onebuilding.org/pipermail/trnsys-users-onebuilding.org/attachments/20190221/d5ac6f03/attachment.html>