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2019 10 09_meeting
Date: October 9, 2019, 8:15am-9am Pacific Times
The purpose of this meeting is to coordinate the Modelica integration for SOEP.
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- Previous action items.
- Modelon update about numerical investigation (Agnes).
- Kyle, Michael: Refactoring room air heat and mass balance.
- EnergyPlus I/O variables.
- Stuart: FMI-QSS.
- Kyle, Michael: Optimica license protection.
- Jianjun: JSON representation for OS front-end to Modelica
- Other items
No work conducted.
Branch issue1129_energyPlus_zone now works for multiple buildings for JModelica, Dymola and OpenModelica. This has the FMI interface now.
Added on Modelica side the option to specify the EnergyPlus verbosity. Need support on the EnergyPlus side.
Next, work on
- Implement control I/O.
- Kyle to make an FMU that does not compress the files.
- Michael look into multiple copies of binaries.
- Kyle to look into generating all outputs in the folder tmp-simulation-TwoIdenticalZones
- Kyle to look into numerical instability (walls may be initialized to wrong temperature). See for example Experimental/EnergyPlus/Examples/VAVReheatRefBldgSmallOffice/FloorOpenLoop or Experimental/EnergyPlus/Validation/OneZone and set the initial room temperature to 10 degC.
- Michael and Kyle to work out how to filter level of info/error/fatal errors.
- Yanfei to clean up idf file for 2 identical rooms to avoid EnergyPlus errors.
- Installer package for all three platforms.
- All zones in the idf file must have a zone model in Modelica. Otherwise the simulation stops with an error.
- If there is an HVAC system in the idf file, then EnergyPlus issues a warning, the EnergyPlus HVAC system is not simulated, but the coupled EnergyPlus/Modelica simulation proceeds.
- For the EnergyPlus envelope, either the CTF transfer function or the finite difference method can be used.
Kyle added EMS actuators and output variables.
Stuart works on using the directional derivatives, has it working now in OCT. Updated QSS code to use directional derivatives. Now works on parallelization.
Stuart works with Agnes as reverse dependencies seem missing in the modelDescription.xml file.
No discussion.
Next:
- Test using funnel as the default diff tool in BuildingsPy.
- Use funnel for cross comparison between dymola and jmodelica.
- Work on experiment specification.
No discussion.
Subcontract between Modelon and NREL still not in place. Hubertus will have a call with Luigi.
Potential paths: Check diff to frozen library. Allow n models to be changed. Upgrade path to full OCT version (with access to cloud version in an integrated way).
Need to define the different use cases and work flows.
Use of python API makes protection much easier, is sufficient unless interactive mode is needed. Java API would be needed for interactive mode.
No discussion.
Jianjun to work on modelica-json parsing in Modelica rather than CDL mode.
Ongoing is dealing with replaceable models.
None.
None, but see next steps under "Refactoring room air balance".
Jianjun will change nle_solver_tol_factor to 1E-2 instead of 1E-4 in regression testing.
Michael will look into making dp of pressure drop elements a state rather than p using stateSelect.
Michael to add to next Modelon subcontract fall back to avoid tearing.
Agnes to get back regarding debug information for user for nonlinear solver.