[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

[TRNSYS-users] Internal wall modelling



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