IBPSA Modelica Working Group: Open-source model development based on open standards to accelerate decarbonization
Why this work is in the frame
A frame that forgets how it found something cannot be audited. These are the routes that admitted this work.
Bibliographic record
Abstract
In 2022, the IBPSA Board of Directors approved the formation of the IBPSA Modelica Working Group, https://ibpsa.github.io/modelica-working-group/. Its purpose is to further develop the Modelica IBPSA Library, and to coordinate the needs of the IBPSA community with the Modelica community using the earlier work of IBPSA project 1 and IEA-EBC Annex 60 as a starting point.This paper gives an overview of the Modelica IBPSA Library (https://github.com/ibpsa/modelica-ibpsa), an open-source, free library of component models for building and district energy systems that is implemented in the Modelica language, an open-standard language for modeling of engineered systems. The paper describes the main recent developments of models for heat pumps, geothermal borefields, aquifer thermal energy storage systems, reduced-order building models, ground-coupled district network pipes, controls modeling based on the emerging ASHRAE Standard 231P, and electrical system simulation. It explains how the library is developed and validated, and how it is being used by the four Modelica libraries that use the Modelica IBPSA Library as its core, namely the AixLib, Buildings, BuildingSystems and IDEAS libraries. Modelica uniquely enables cross domain simulations that can couple electrical, fluid, thermal and other types of models. The paper will close with brief examples that show the range of applications supported by these four libraries that integrate some of the newly developed models.
Fetched live from OpenAlex and de-inverted. Abstracts are not stored in this database: the inverted indexes are 8.6 GB of the frame’s 9.3 GB of text, and the host has 13 GB free.
Full frame distilled prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. Learned from the 10,348 direct Codex labels and 10,348 direct Gemma labels. Candidate is the union of thresholded teacher heads; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels or direct frontier model labels.
Codex and Gemma teacher scores by category
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.002 | 0.000 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.001 | 0.001 |
| Science and technology studies | 0.001 | 0.000 |
| Scholarly communication | 0.005 | 0.001 |
| Open science | 0.003 | 0.001 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.000 | 0.000 |
Machine scores (provisional)
The two teacher heads of the student model, read on this work. A score orders the frame for review; it never asserts a category, and the validation status ships verbatim with every row.
Baseline scores from an immature model (maturity gate not passed, 7 training rounds). Scores rank; they never assert a category.
score_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from it