NREL/openstudio-standards
Jan 2025 – Mar 2025
3 Months active
Languages Used
OpenStudioRubyText
Technical Skills
Boiler SizingBoiler SystemsBuilding Energy ModelingBuilding Performance SimulationCode RefactoringEnergy Modeling
khaddad
PROFILE
Khaddad
Over three months, Khaled Haddad enhanced the NREL/openstudio-standards repository by developing advanced HVAC and energy management features for building energy modeling. He introduced a central HVAC configuration with backup boilers and fan coils, expanding support for multi-boiler and multi-fuel scenarios. Khaled implemented an Energy Management System script in Ruby and OpenStudio to optimize heat pump operation by prioritizing cooling demand, improving energy efficiency. He also added support for water and hot-water coils as backup heating sources, integrating robust error handling and capacity calculations. His work demonstrated depth in HVAC system modeling, code refactoring, and regression testing for reliable simulation outcomes.
Overall Statistics
Feature vs Bugs
100%Features
Repository Contributions
11Total
Bugs
0
Commits
11
Features
4
Lines of code
39,847
Activity Months3
Your Network
20 people
Work History
March 2025
2 Commits • 1 Features
Mar 1, 2025March 2025 highlights: Delivered HVAC backup heating enhancements in NREL/openstudio-standards to support water heating coils and hot-water coils. Implemented CoilHeatingWater as a backup coil with capacity retrieval and error handling for unsupported coil types; introduced hot-water coil as a backup option with capacity calculation integrated alongside existing electric and gas coils. These changes improve model fidelity, reliability, and energy-balance accuracy for buildings with water heating strategies.
2 Commits • 1 Features
Mar 1, 2025March 2025 highlights: Delivered HVAC backup heating enhancements in NREL/openstudio-standards to support water heating coils and hot-water coils. Implemented CoilHeatingWater as a backup coil with capacity retrieval and error handling for unsupported coil types; introduced hot-water coil as a backup option with capacity calculation integrated alongside existing electric and gas coils. These changes improve model fidelity, reliability, and energy-balance accuracy for buildings with water heating strategies.
March 2025
February 2025
1 Commits • 1 Features
Feb 1, 2025February 2025 Monthly Summary (Month: 2025-02) – NREL/openstudio-standards Key features delivered: - Energy Management System: CASHP cooling-priority EMS script implemented to optimize run-time energy use. The script prioritizes cooling demand and switches the heat pump to heating mode only when there is no cooling demand. Major bugs fixed: - No major bugs reported this month. Overall impact and accomplishments: - Improved energy efficiency for the CASHP system by ensuring that cooling is prioritized, reducing unnecessary heating energy and aligning with EMS optimization goals. - Clear traceability of changes with the commit ff936868db61c09d33aef18d2f9d2d7f90286e2c, facilitating auditing and future enhancements. - Positioning for further EMS-driven optimizations in future sprints. Technologies/skills demonstrated: - Energy management scripting, control logic design, version control, and repository collaboration.
February 2025
1 Commits • 1 Features
Feb 1, 2025February 2025 Monthly Summary (Month: 2025-02) – NREL/openstudio-standards Key features delivered: - Energy Management System: CASHP cooling-priority EMS script implemented to optimize run-time energy use. The script prioritizes cooling demand and switches the heat pump to heating mode only when there is no cooling demand. Major bugs fixed: - No major bugs reported this month. Overall impact and accomplishments: - Improved energy efficiency for the CASHP system by ensuring that cooling is prioritized, reducing unnecessary heating energy and aligning with EMS optimization goals. - Clear traceability of changes with the commit ff936868db61c09d33aef18d2f9d2d7f90286e2c, facilitating auditing and future enhancements. - Positioning for further EMS-driven optimizations in future sprints. Technologies/skills demonstrated: - Energy management scripting, control logic design, version control, and repository collaboration.
January 2025
8 Commits • 2 Features
Jan 1, 2025January 2025 monthly summary for NREL/openstudio-standards focusing on ECM HS15 feature delivery and testing framework enhancements. No explicit major bug fixes documented in this period; maintenance and reliability improvements were captured within feature work and test automation. Business value centers on expanded modeling fidelity for central HVAC with backup boilers, multi-fuel support, and improved regression testing and CI readiness.
8 Commits • 2 Features
Jan 1, 2025January 2025 monthly summary for NREL/openstudio-standards focusing on ECM HS15 feature delivery and testing framework enhancements. No explicit major bug fixes documented in this period; maintenance and reliability improvements were captured within feature work and test automation. Business value centers on expanded modeling fidelity for central HVAC with backup boilers, multi-fuel support, and improved regression testing and CI readiness.
January 2025
Activity
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Quality Metrics
Correctness90.0%
Maintainability89.2%
Architecture89.2%
Performance81.8%
AI Usage20.0%
Skills & Technologies
Programming Languages
OpenStudioRubyText
Technical Skills
Boiler SizingBoiler SystemsBuilding Energy ModelingBuilding Performance SimulationCode RefactoringEnergy Management Systems (EMS)Energy ModelingEnergy SimulationFan Coil UnitsHVAC System ModelingHVAC SystemsHVAC Systems DesignHeat Pump TechnologyOpenStudio SDKRegression Testing
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