OpenStudio Error when using Low Temp Radiant Var Flow- HVAC system, possible bug?
Hi!
I encountered an error while trying to create a Thermally Activated Building Structure, a TABS System.
I used OpenStudio 3.9 and created a Plant Loop with Low Temp Radiant Var Flow Objects in OS or ZoneHVAC:LowTemperatureRadiant:VariableFlow:Design according to the EnergyPlus Input Out Doc.
When i try to run the system (District Heating & Cooling, SetPoint Manager, Variable Pump) i get the error messages:
** Severe ** <root>[Branch][Plant Loop 1 Demand Branch 2][components][0] - Missing required property 'component_name'.
** Severe ** <root>[Branch][Plant Loop 1 Demand Branch 2][components][0] - Missing required property 'component_object_type'.
When i check the idf-File in the idf editor using the Validity Check Feature the the name objects are alway empty and i cant seem to find the corresponding names.
Is there maybe a Bug where it is currently not possible to use the ZoneHVAC:LowTemperatureRadiant:VariableFlow:DesignObjects due to errors in translating to idf?
Any help would be appreciated! Also if you have any other ideas for creating a tabs system i would like to hear it all! Alex
Edit: Add Pictures showing missing Entrys
Do you also have a ConstructionProperty:InternalHeatSource and assigned to the constructions that you are using for radiant surfaces? While I am not familiar with the implementation in OpenStudio, EP3 will double-check for compatible radiant prior to creating the EnergyPlus ZonehVAC:LowTemperatureRadiant:VariableFlow object.
Hi, yes i believe that was the problem! I fixed it and now i can export without an issue. Maybe there is bug because it isnt giving any error just not exporting the objects at all.