Yi Qiao Wang developed advanced emissions modeling and building simulation features for the CityEnergyAnalyst repository, focusing on both operational and embodied emissions at building and district scales. Using Python and SQL, Wang engineered robust data models and timeline generators that integrate hourly and lifecycle emissions, supporting scenario analysis for grid decarbonization. The work included schema migrations, configuration management, and enhancements to geometry processing for complex building forms such as void decks and floating structures. Emphasis on code clarity, type hinting, and error handling improved maintainability and reliability, while dashboard and reporting updates enabled more accurate, policy-relevant energy and emissions insights.
October 2025: Delivered a substantial enhancement to grid-emissions modeling in CityEnergyAnalyst, introducing discounting and flexible data sources to support scenario analysis for grid decarbonization. The update includes per-feedstock discount policies, pluggable interpolation strategies, and the ability to override grid carbon intensity via CSV, along with targeted robustness improvements and code quality refinements.
October 2025: Delivered a substantial enhancement to grid-emissions modeling in CityEnergyAnalyst, introducing discounting and flexible data sources to support scenario analysis for grid decarbonization. The update includes per-feedstock discount policies, pluggable interpolation strategies, and the ability to override grid carbon intensity via CSV, along with targeted robustness improvements and code quality refinements.
September 2025: Delivered district-level emissions insights and dashboard enhancements, with backend/schema maintenance and data/config improvements that together raise reliability, visibility, and business value. Key contributions include district-level timeline results with proper units, a consolidated dashboard panel for hourly operational and embodied emissions plus hourly feedstock output, backend/schema updates including feedstock_db integration and script prerequisites, and updated project data/config with new entries and timeline length declarations. Also completed code cleanups and refactors to improve maintainability. Stabilized emission calculations by ensuring compatibility with master changes, added safeguards against division-by-zero, and corrected operational emission accounting where needed.
September 2025: Delivered district-level emissions insights and dashboard enhancements, with backend/schema maintenance and data/config improvements that together raise reliability, visibility, and business value. Key contributions include district-level timeline results with proper units, a consolidated dashboard panel for hourly operational and embodied emissions plus hourly feedstock output, backend/schema updates including feedstock_db integration and script prerequisites, and updated project data/config with new entries and timeline length declarations. Also completed code cleanups and refactors to improve maintainability. Stabilized emission calculations by ensuring compatibility with master changes, added safeguards against division-by-zero, and corrected operational emission accounting where needed.
August 2025 (CityEnergyAnalyst) monthly summary: Delivered a robust Building Emission Timeline System combining embodied and hourly operational emissions timelines with envelope data access and configuration integration. Foundational design completed with BuildingEmissionTimeline class and a functional timeline generator for individual buildings, positioned to support a full total emission timeline through clear prerequisites and incremental refinements.
August 2025 (CityEnergyAnalyst) monthly summary: Delivered a robust Building Emission Timeline System combining embodied and hourly operational emissions timelines with envelope data access and configuration integration. Foundational design completed with BuildingEmissionTimeline class and a functional timeline generator for individual buildings, positioned to support a full total emission timeline through clear prerequisites and incremental refinements.
July 2025 monthly summary for CityEnergyAnalyst architecture-building-systems. Focused on stabilizing core calculations, modernizing the data model for complex building forms, and expanding geometry capabilities to better support void decks. Key outcomes include robust thermal balance handling, the introduction of a new underside surface type with standardized terminology, and a comprehensive void_deck data model migration and validation across zone geometry, building data, and migration scripts. These efforts improved simulation reliability, data integrity, and end-to-end data flow from CEA inputs to zone geometry. The work aligns with business goals of delivering accurate energy simulations for diverse building configurations and enabling more scalable data processing across databases and schemas.
July 2025 monthly summary for CityEnergyAnalyst architecture-building-systems. Focused on stabilizing core calculations, modernizing the data model for complex building forms, and expanding geometry capabilities to better support void decks. Key outcomes include robust thermal balance handling, the introduction of a new underside surface type with standardized terminology, and a comprehensive void_deck data model migration and validation across zone geometry, building data, and migration scripts. These efforts improved simulation reliability, data integrity, and end-to-end data flow from CEA inputs to zone geometry. The work aligns with business goals of delivering accurate energy simulations for diverse building configurations and enabling more scalable data processing across databases and schemas.
June 2025: Delivered core model enhancements for CityEnergyAnalyst, including LCA void_deck handling and floating-building support; implemented safety checks for surrounding geometries and corrected solar radiation calculations for overlapping buildings; improved scheduling and data initialization by including void_deck in schedule generation and separating timeseries initialization; enabled heat transfer from floating buildings to ground when underground parts exist; strengthened code quality with broader documentation and type hints across geometry and thermal modules.
June 2025: Delivered core model enhancements for CityEnergyAnalyst, including LCA void_deck handling and floating-building support; implemented safety checks for surrounding geometries and corrected solar radiation calculations for overlapping buildings; improved scheduling and data initialization by including void_deck in schedule generation and separating timeseries initialization; enabled heat transfer from floating buildings to ground when underground parts exist; strengthened code quality with broader documentation and type hints across geometry and thermal modules.
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