Hi, I am trying to implement a radiant ceiling system to my OpenStudio (V1.9.5) model. As shown in many tutorials I created an internal source construction, applied it to the surface and used the low temperature radiant var flow for the thermal zone. As long as applied for my first floor it works, but as soon as I try to apply it to the second floor I get the following error:
* Severe * Surface SURFACE 30 is referenced by more than one radiant system--this is not allowed * Severe * Interzone surface SURFACE 55 is referenced by more than one radiant system--this is not allowed
I compared two .idf files, one in which I used a BCL measure to apply a radiant floor system and one where I assigned the internal source construction by myself. What is striking is that in the model I applied the radiant ceiling system the flow fraction is shared (shown below). Do you know why this happens? I did not make this selection in my OpenStudio model. And why does the BCL measure apply an internal construction for each surface, is that necessary?
Thank you, Phil
ZoneHVAC:LowTemperatureRadiant:SurfaceGroup, Low Temp Radiant Var Flow 4Ceilings, !- Name Surface 55, !- Surface Name 1 0.5, !- Flow Fraction for Surface 1 Surface 60, !- Surface Name 2 0.5; !- Flow Fraction for Surface 2
