Construction with internal source and .getConstructions

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Hi Matthew

Thanks for your advice. I just tried with model.getConstructionWithInternalSources, but got one error for "dynamic constant assignment" as below.

Standard Output:
[13:43:55.018342 ERROR] :/ruby/2.5.0/gems/openstudio-workflow-2.1.0/lib/openstudio/workflow/util/measure.rb failed with message C:/Users/CGBC012/OpenStudio/Measures/test_map/measure.rb:46: dynamic constant assignment 
ConstructionInterS = model.getConstructionWithInt... 
^

In Ruby, a variable name that starts with a capital letter (like "ConstructionInterS") is considered to be a constant, and can only be set once.

Thanks Eric, I changed the name and it worked well

Curious how you are modifying the thermal properties (thermal mass). I am currently working on a modeling project to estimate the total thermal mass [J/K] of a building. Tried looping through all surfaces, getting their constructions, and then looking at the combination of density [kg/m^3], specific heat [J/kg-K], thickness [m], and net surface area [m^2] to calculate a [J/K] value, but my code just printed out 0 [J/K] for all constructions...

Hi sashadf1, You raised a very good question. For this moment I used .to_OpaqueMaterial.get.thermalResistance and to_OpaqueMaterial.get.setThermalResistance to change the thermal resistance of each material layer in construction. There also a pair of .to_StandardOpaqueMaterial.get.density and to_StandardOpaqueMaterial.get.setDensity to change the density.

When I tested the two pairs I found that the "setThermalResistance" in fact changed the thickness of material, and "setDensity" changed the density. I am not sure if the former will impact also thermal capacitance ?