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2024 04 09 coordination
Date: April 9, 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 (--)
Presentation (BESTEST validation for the ISO13790 model Alessandro Maccarini)
ATES model (Alessandro Maccarini)
ISO 13790 models (Alessandro Maccarini)
PV collector, battery and electrical component models (Laura Maier)
Modular heat pump (Fabian Wüllhorst)
New state selection (Michael Wetter)
Solar thermal model (Jelger Jansen)
Integration of new models into the library
OpenSCALING project updates
Progress on pull requests, https://github.com/ibpsa/modelica-ibpsa/pulls
| Michael Wetter, LBNL | H. Casper Fu, LBNL | Ettore Zanetti, LBNL | Louis Hermans, KU leuven | Alessandro Maccarini, Aalbord University | Fabian Wuellhorst, RTWH Aachen | Filip Jorissen, Builtwins
- Discussion on radiator model that assumes constant fraction for radiation and convection. This is not the case at lower temperatures (issue with retrofits where heat pumps are used). Fabian may take a look at possible improvements on the model to address this issue.
- Discussion on weekly schedule format, Drop boilerplate header
double tabn(x,x). Filip to work on implementation.
Send email to colleagues to check if they can have detailed simulations results for validation.
Alessandro Met with Jianjun. Could not test script on Alessandro's computer due to a timeout issue. Alessandro is updating the testing script to avoid the this time out issue and testing with Buildings library ISO model.
Laura should be able to finish up the pull request this month.
Fabian implemented changes proposed by Antoine. Antoine will re-check changes. Open Modelica issue was with parameters in records that was due to OpenModelica not handling those correctly. For now to be put on exclude list.
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.
First PR merged by Michael. Now new changes will be added: New changes:
- Parallel and series at the same time (implemented and needs review)
- IAM Improve incidence angle modifier function (now 0-60, but datasheets 0-90), check issue3604 for plots. Jelger wants to switch to a cubic spline interpolation but Users have to be careful on setting the points (at least 3 points) one close to 0 one close to 90. Michael and Filip suggest to add assertion and user warning.
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
- 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/)