[TRNSYS-users] correct modelling of brick facade

[leen peeters <l.f.r.peeters@gmail.com>]

Hi all,

 

when there is a typical construction of an outer wall with inside to outside:

plaster

brick

insulation

cavity

facade brick

 

I wonder what the correct approach is...

I generally do not model the outside layer as te cavity is ventilated and there is no way to know what the ventiation rate will be in the cavity of my future wall.

However, if I do it that way, I could not leave the emissivity as it is for the insulation. That emissivity will react with the outside climate. In reality, it will exchange thermal energy with the inside of the facade brick, which gives a delayd effect and might be strongly influenced by the water content of those bricks.

 

Any suggestions?

 

Leen