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Hello,
I need to simulate certain areas of a fort for a project. The problem is that TRNBuild cannot handle walls thicker than one metre. To get around this, I have tried adjusting the conductivity and density to create a wall that is less than one metre thick but has the same properties as my three-metre wall. However, TRNBuild consistently returns an error when generating the transfer function coefficients due to stability criteria.
Does anyone have any suggestions for how to solve this problem?
Thanks in advance!
this has been a long standing problem and (as far as I know) the only workaround is to treat the wall as though it were only a thermal resistance. Obviously this has the significant disadvantage of ignoring the thermal capacitance of the thick walls.
some time ago we experimented with a finite-difference wall model that could be coupled to Type56 in the same way that Type36 (Trombe wall). We felt the results were good but if all the external walls of the building are thermally massive then each of them has to be modeled by an external component. Not ideal to say the least.
~david
