[TRNSYS-users] transfer function

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

Dear all,

 

I am trying to model an old house which will be imporved to a very good house (www.zehr .be). The existing brick walls consist of 33 cm of brick, no air cavity or insulation. One wall will be packed with 6cm VIP, the remainder will be packed with a 30 cm layer of insulation (lanba of 0.038 W/mK).

However modeling that, I ran into problems with the stability of the transfer function, shoudl that I had to tune my capacities and densities in order to end up with something that was accepted for calculating the transferfunction.

 

Can anyone explain me the logic of these warming messages and the reason why thick highly insulated walls cause an issue? I trid splitting one layer into two, but that did not resolve the problems...

 

leen