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Hendrik van der Stok

PROFILE

Hendrik Van Der Stok

Hendrik Stok contributed to the RWTH-EBC/AixLib and TEASER repositories by developing and refining features for building energy simulation and boiler system modeling. He enhanced pressure drop modeling in AixLib, standardized boiler parameters, and centralized boiler data management using Modelica and Python. In TEASER, he improved export workflows, expanded test coverage, and introduced robust data validation utilities, ensuring reliable simulation exports and easier onboarding for new users. Hendrik’s work emphasized code maintainability through refactoring, documentation alignment, and CI/CD improvements. His technical approach balanced backend development, scripting, and error handling, resulting in more accurate, maintainable, and user-friendly simulation tools.

Overall Statistics

Feature vs Bugs

69%Features

Repository Contributions

71Total
Bugs
13
Commits
71
Features
29
Lines of code
2,675
Activity Months4

Work History

April 2025

4 Commits • 1 Features

Apr 1, 2025

April 2025: Focused on stability, data integrity, and release readiness for TEASER. Completed three core deliveries across calculation modules and export workflows, resulting in improved resilience against warnings, centralized validation utilities, and a formal patch release. Impact includes preventing unintended crashes due to misused warnings, ensuring exports target valid projects/buildings, and reducing duplication via a centralized validation utility. Demonstrated strong release discipline and Python engineering practices, with measurable business value in reliability and data integrity.

December 2024

30 Commits • 16 Features

Dec 1, 2024

December 2024 monthly summary for RWTH-EBC development focusing on TEASER and AixLib contributions. Key efforts spanned feature enhancements, testing, refactoring, and reliability fixes that collectively improve usability, maintainability, and upgrade paths for end users.

November 2024

28 Commits • 9 Features

Nov 1, 2024

November 2024 monthly performance summary for RWTH-EBC projects. Delivered data management improvements, export capabilities, and modeling accuracy enhancements across AixLib and TEASER. Business impact includes more reliable simulations, streamlined data handling, and improved configurability for BESMod exports, accelerating analysis cycles and enabling better decision-making. Key technical achievements include: centralized BoilerRecordsData.xlsx for boiler data; corrected boiler pressure loss in simulation results; BESMod export enhancements with extra parameters, weather file export, and location-specific settings; heat load calculation improvements (static_ifiltationrate for EN 12831) and updated reference; infiltration parameter rename to base_infiltration; heating set back support in BesMod export. Additional housekeeping (code cleanup, template/script updates, and reporting modularization) improved maintainability and future extensibility.

October 2024

9 Commits • 3 Features

Oct 1, 2024

October 2024 monthly summary focusing on enhancing physical accuracy, standardization, and data quality across RWTH-EBC repositories. Key work centered on AixLib and TEASER to improve modeling fidelity, reduce configuration errors, and provide clearer visualization for stakeholders. Delivered business value through improved system sizing/operation predictions, easier maintenance, and better onboarding for new contributors.

Activity

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Quality Metrics

Correctness89.8%
Maintainability92.2%
Architecture88.2%
Performance83.2%
AI Usage20.4%

Skills & Technologies

Programming Languages

MakoMarkdownModelicaPythonTOMLText

Technical Skills

API DesignAPI DevelopmentAPI IntegrationBackend DevelopmentBoiler ModelingBoiler SystemsBug FixBug FixingBuilding Energy SimulationCI/CDCode CleanupCode ConsistencyCode DocumentationCode ExamplesCode Formatting

Repositories Contributed To

2 repos

Overview of all repositories you've contributed to across your timeline

RWTH-EBC/TEASER

Oct 2024 Apr 2025
4 Months active

Languages Used

ModelicaPythonMakoMarkdownTOML

Technical Skills

Data VisualizationModelica DevelopmentScriptingAPI DesignAPI DevelopmentAPI Integration

RWTH-EBC/AixLib

Oct 2024 Dec 2024
3 Months active

Languages Used

ModelicaText

Technical Skills

Boiler ModelingBoiler SystemsComponent ModelingControl SystemsData ManagementDocumentation

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