-
Notifications
You must be signed in to change notification settings - Fork 0
2024 09 5 coordination
Date: September 5, 2024, 8:00 - 9:00 Pacific Times.
The purpose of this meeting is to coordinate the Modelica IBPSA Working Group.
Join from PC, Mac, Linux, iOS or Android: https://lbnl.zoom.us/my/mwetter
Or iPhone one-tap (US Toll): +14086380968,6614042296# or +16465588656,6614042296#
Or Telephone: Dial: +1 408 638 0968 (US Toll) or +1 646 558 8656 (US Toll) Meeting ID: 661 404 2296 International numbers available: https://lbnl.zoom.us/zoomconference?m=_h5BuJ686mPy3rWEyKf4NROxLaeOV5J8
Miscellanous (--)
Building Simulation 2025 Paper
Refactor actuator travel time (Michael Wetter)
ATES model (Alessandro Maccarini)
ISO 13790 models (Alessandro Maccarini)
PV collector, battery and electrical component models (Laura Maier)
New state selection (Michael Wetter)
Integration of new models into the library
OpenSCALING project updates
Progress on pull requests, https://github.com/ibpsa/modelica-ibpsa/pulls
| Michael Wetter, LBNL | Casper Fu, LBNL | Ettore Zanetti, LBNL | Alessandro Maccarini, Aalborg University | Jelger Jansen, KU Leuven | Lucas Verleyen, KU Leuven
Michael will come out with an outline to be shared. Each library could have a paragraph/page to show those integrated simulations.
See issue #1926. Current actuator has rise time modelled by second order filter. Legacy implementation for numerical issues. It always takes the same time do an opening (100% takes 2 minutes, 10% takes 2 minutes). The new implementation is a linear in time (emulates real behavior of motor in an actuator). https://github.com/lbl-srg/modelica-buildings/issues/3965 has .zip file with benchmarks using different compiler. No clear benefit from a computational standpoint (some became faster, and some became slower). Some models crash, but issues can be resolved (pump starting when valve is closed). For parametrization and model update, Michael suggests to remove the old filter and update naming to more realistic names (using conversion scripts, so process should be quite painless for other libraries). Ettore sent email to Google group to check issue.
Meeting next week with TU DEFT. Defined 4-5 scenarios where Modelica will be compared detailed results.
Jelger did the review and Alessandro addressed it. There is a conflict between branch and master. Alessandro will try to figure it out, and reach out if he cannot solve it. The Jelger to finalize revision.
No updates.
https://github.com/ibpsa/modelica-ibpsa/issues/1412
Michael work on model initialization? Difference of pressure instead of absolute pressure (in theory is better, in numerical simulation it seems inconclusive it depends on the models, scaling seems to work better) Comparison speed vs accuracy? (speed and if models actually run). Maybe use bounded attribute of real variables.
OCT has been updated and it is a work in progress.
New models to be developed/integrate:
- Discussions about others and future development, such as
- APPROVED
- enthalpy and energy recovery wheel (Oakridge national lab is working on a model for the Buildings that could be integrated)
- validation of models (No updates)
- CDL integration (No updates)
- preconfigured controls (No updates)
- NEED MORE DISCUSSION
- NEW: Zoned borefields (https://github.com/lbl-srg/modelica-buildings/pull/3812)
- thermal storage (No updates)
- better dynamic ground coupling of long district pipes (PR merged into Buildings, to be moved to IBPSA)
- CHP and organic Rankine cycle (Casper is working on a PR for Buildings library)
- more geothermal (horizontal loop, slinky loop, others) (Massimo could look into specific modelling efforts that have been done by co-workers)
- APPROVED
Kick-off meeting in November.
If interested in an advisory board work with Oliver Lenord to issue NDA contract.
Come up with requirements:
data source
large models (compilation, simulation, optimization, UQ)
provide library of models
computationally expensive ones
numerically problematic ones (see also https://ibpsa.github.io/modelica-challenge-problems/)