RWTH-EBC/AixLib
Dec 2024 – May 2025
4 Months active
Languages Used
ModelicaNoneMos
Technical Skills
Building Energy ModelingBuilding Performance SimulationCode RefactoringControl SystemsDocumentationEnergy Systems Modeling
Jun Jiang
PROFILE
Jun Jiang
Worked on the RWTH-EBC/AixLib repository, delivering feature-rich enhancements for building energy modeling and simulation. Over four months, developed and standardized Modelica-based models for window opening, solar radiation, and sunblind behavior, ensuring compliance with DIN16798 and improving interoperability. Introduced a comprehensive KPI framework for temperature, energy, and indoor air quality, including CO2 metrics, and automated simulation plotting for better performance evaluation. Applied code refactoring and scripting to maintain backward compatibility and streamline upgrades, while strengthening documentation and CI/CD processes. This work improved model accuracy, maintainability, and reproducibility, supporting robust energy systems analysis and facilitating downstream integration and onboarding.
Overall Statistics
Feature vs Bugs
83%Features
Repository Contributions
35Total
Bugs
2
Commits
35
Features
10
Lines of code
3,636
Activity Months4
Your Network
43 peopleSame Organization
@eonerc.rwth-aachen.de24
Work History
May 2025
4 Commits • 1 Features
May 1, 2025Month: 2025-05 — RWTH-EBC/AixLib: Sunblind Parameter Naming Consistency across AixLib. Consolidated and documented sunblind-related parameter naming (Imax -> H_max) across sunblind models and Wall component; updates to conversion scripts and revision history for issue 1525; CI trigger added to validate changes automatically. This work improves model interoperability, reduces parameter mismatch risks, and strengthens traceability across the AixLib sunblind subsystem.
4 Commits • 1 Features
May 1, 2025Month: 2025-05 — RWTH-EBC/AixLib: Sunblind Parameter Naming Consistency across AixLib. Consolidated and documented sunblind-related parameter naming (Imax -> H_max) across sunblind models and Wall component; updates to conversion scripts and revision history for issue 1525; CI trigger added to validate changes automatically. This work improves model interoperability, reduces parameter mismatch risks, and strengthens traceability across the AixLib sunblind subsystem.
May 2025
March 2025
3 Commits • 2 Features
Mar 1, 2025Concise monthly summary for 2025-03 focusing on two major AixLib enhancements and readiness improvements. Delivered: 1) Solar radiation naming standardization across AixLib, enhancing clarity and consistency of interfaces and models. 2) AixLib 2.1.2 upgrade with a backward-compatible migration script for AixLib.Utilities.Interfaces and AixLib.Utilities.Sources. No major bugs reported this month; all changes include clear commit messages and traceability (Signed-off-by: Jun Jiang). Overall impact includes improved maintainability, smoother upgrades, and better onboarding for downstream integrations. Technologies/skills demonstrated include: refactoring for naming consistency, version management, backward-compatibility scripting, and collaboration practices (code review and signed-off commits).
March 2025
3 Commits • 2 Features
Mar 1, 2025Concise monthly summary for 2025-03 focusing on two major AixLib enhancements and readiness improvements. Delivered: 1) Solar radiation naming standardization across AixLib, enhancing clarity and consistency of interfaces and models. 2) AixLib 2.1.2 upgrade with a backward-compatible migration script for AixLib.Utilities.Interfaces and AixLib.Utilities.Sources. No major bugs reported this month; all changes include clear commit messages and traceability (Signed-off-by: Jun Jiang). Overall impact includes improved maintainability, smoother upgrades, and better onboarding for downstream integrations. Technologies/skills demonstrated include: refactoring for naming consistency, version management, backward-compatibility scripting, and collaboration practices (code review and signed-off commits).
January 2025
13 Commits • 5 Features
Jan 1, 2025Month 2025-01 highlights for RWTH-EBC/AixLib focusing on delivering feature-rich modeling enhancements, KPI improvements, and robust plotting/CI improvements. Key outcomes include wind-driven airflow optimization, new ElectricityMeter, standardized assessment inputs, expanded IAQ KPI suite with DIN EN 16798-1 compliance, and KPI visualization enhancements, along with addressing CO2Kpis plotting script issues to improve reliability and business value.
13 Commits • 5 Features
Jan 1, 2025Month 2025-01 highlights for RWTH-EBC/AixLib focusing on delivering feature-rich modeling enhancements, KPI improvements, and robust plotting/CI improvements. Key outcomes include wind-driven airflow optimization, new ElectricityMeter, standardized assessment inputs, expanded IAQ KPI suite with DIN EN 16798-1 compliance, and KPI visualization enhancements, along with addressing CO2Kpis plotting script issues to improve reliability and business value.
January 2025
December 2024
15 Commits • 2 Features
Dec 1, 2024December 2024 (2024-12) monthly summary for RWTH-EBC/AixLib focusing on business value and technical achievements. Delivered DIN16798-compliant window opening behavior with a new winOpnBeh parameter and updates to SimpleOpening/SashOpening models, along with refreshed plots and documentation. Implemented a comprehensive KPI and integral error framework (IAE, ISE, filtered integral errors, dual bounds, IntegralTimer) with associated temperature and energy KPIs, enabling richer performance evaluation. Fixed robustness issue by removing wind speed checks in the Caciolo model. Improved documentation and examples to support reproducibility and user adoption. These changes enhance compliance, model accuracy, and decision-support capabilities for energy simulations.
December 2024
15 Commits • 2 Features
Dec 1, 2024December 2024 (2024-12) monthly summary for RWTH-EBC/AixLib focusing on business value and technical achievements. Delivered DIN16798-compliant window opening behavior with a new winOpnBeh parameter and updates to SimpleOpening/SashOpening models, along with refreshed plots and documentation. Implemented a comprehensive KPI and integral error framework (IAE, ISE, filtered integral errors, dual bounds, IntegralTimer) with associated temperature and energy KPIs, enabling richer performance evaluation. Fixed robustness issue by removing wind speed checks in the Caciolo model. Improved documentation and examples to support reproducibility and user adoption. These changes enhance compliance, model accuracy, and decision-support capabilities for energy simulations.
Activity
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Quality Metrics
Correctness92.0%
Maintainability92.0%
Architecture90.0%
Performance83.4%
AI Usage20.0%
Skills & Technologies
Programming Languages
ModelicaMosNone
Technical Skills
Building Energy ModelingBuilding Performance SimulationCI/CDCode RefactoringCode StandardizationControl SystemsData VisualizationDebuggingDocumentationEnergy Systems ModelingEnergy Systems SimulationError AnalysisHVAC ModelingIndoor Air Quality AnalysisKPI Analysis
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