2024 02 29 coordination

IBPSA Modelica Working Group

Date: February 29, 2024, 8:00 - 9:00 Pacific Times.

The purpose of this meeting is to coordinate the Modelica IBPSA Working Group.

Meeting information

Join from PC, Mac, Linux, iOS or Android: https://lbnl.zoom.us/my/mwetter

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Agenda

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

Participants

| Alessandro Maccarini, Aalborg University | Fabian Wuellhorst, RWTH Aachen | Dre Helms, Harvey Mudd College | Filip Jorissen, Builtwins | Jelger Jansen, KU Leuven | Louis Hermans, KU Leuven | Lucas Verleyen, KU Leuven | Michael Wetter, LBNL | Casper Fu, LBNL | Ettore Zanetti, LBNL

Minutes

ATES model

Alessandro is currently working on validation against measurements, colleagues working on detailed fidelity models, should have data in April.

ISO 13790 models

Alessandro can start continuing working on the validation script after 3/11/24.

PV collector, battery and electrical component models

No update.

Modular heat pump

Fabian implemented changes requested by Antoine. Antoine will take a look. Casper to review PR again Open Modelica last nightly build.

New state selection

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.

Solar Thermal Model

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.

Integration of new models into the library

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)

OpenSCALING project updates

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/)

New action items

Previous action items