NREL/EnergyPlus
Nov 2024 – Jan 2026
14 Months active
Languages Used
C++YAMLIDFTeXiddCMakeFortranLaTeX
Technical Skills
Airflow SizingC++C++ DevelopmentCI/CDClean CodeCode Cleanup
rraustad
PROFILE
Rraustad
Over 14 months, Richard Raustad contributed to the NREL/EnergyPlus repository, delivering 45 features and resolving 35 bugs focused on HVAC system modeling, energy simulation, and code maintainability. He enhanced plant heat pump and thermal storage sizing, improved simulation fidelity for desiccant and humidifier modules, and standardized coil sizing logic. Using C++, Fortran, and CMake, Richard applied rigorous code refactoring, expanded unit testing, and enforced const correctness to improve reliability and performance. His work addressed numerical stability, streamlined input/output processing, and strengthened documentation, resulting in more accurate energy modeling, reduced maintenance risk, and a more robust, testable codebase.
Overall Statistics
Feature vs Bugs
56%Features
Repository Contributions
192Total
Bugs
35
Commits
192
Features
45
Lines of code
28,049
Activity Months14
Your Network
38 peopleSame Organization
@fsec.ucf.edu2
Shared Repositories
36
Alex SwindlerMember
Alex SwindlerMember
Amir RothMember
Amir RothMember
Amir RothMember
Amir RothMember
Bereket NigusseMember
brianlballMember
Dominik WójtMember
Work History
January 2026
7 Commits • 3 Features
Jan 1, 2026January 2026 performance highlights for NREL/EnergyPlus: Delivered feature-rich enhancements to humidifier modeling and DOAS ventilation, reinforced with targeted maintainability work and quality improvements. Resulting in more accurate energy simulations, clearer demonstration models, and stronger code health for long-term maintainability.
7 Commits • 3 Features
Jan 1, 2026January 2026 performance highlights for NREL/EnergyPlus: Delivered feature-rich enhancements to humidifier modeling and DOAS ventilation, reinforced with targeted maintainability work and quality improvements. Resulting in more accurate energy simulations, clearer demonstration models, and stronger code health for long-term maintainability.
January 2026
December 2025
1 Commits
Dec 1, 2025December 2025: Concentrated on improving simulation reporting fidelity in NREL/EnergyPlus by fixing surface load reporting during warmup. Excluded warmup period from surface component load reporting to ensure accurate reporting throughout simulations; complemented by automated tests validating HBSM output tabular reporting during WarmupFlag. The work is captured in commit 1942fe428ea7cb7cadb137767ffaec715180aefb.
December 2025
1 Commits
Dec 1, 2025December 2025: Concentrated on improving simulation reporting fidelity in NREL/EnergyPlus by fixing surface load reporting during warmup. Excluded warmup period from surface component load reporting to ensure accurate reporting throughout simulations; complemented by automated tests validating HBSM output tabular reporting during WarmupFlag. The work is captured in commit 1942fe428ea7cb7cadb137767ffaec715180aefb.
November 2025
2 Commits
Nov 1, 2025November 2025 focused on improving the accuracy and usability of the Desiccant/Dehumidifier portion of the EnergyPlus performance model within the NREL/EnergyPlus repository. The changes deliver a more faithful simulation of desiccant/dehumidifier behavior and a cleaner user experience, enabling more reliable energy forecasts and faster issue resolution for engineers.
2 Commits
Nov 1, 2025November 2025 focused on improving the accuracy and usability of the Desiccant/Dehumidifier portion of the EnergyPlus performance model within the NREL/EnergyPlus repository. The changes deliver a more faithful simulation of desiccant/dehumidifier behavior and a cleaner user experience, enabling more reliable energy forecasts and faster issue resolution for engineers.
November 2025
October 2025
8 Commits • 3 Features
Oct 1, 2025October 2025 focused on strengthening simulation fidelity, streamlining input handling, and improving output configurability for EnergyPlus (NREL/EnergyPlus). Delivered three core features with clear business value: improved modeling accuracy for VRF reverse cycle defrost, streamlined heat-pump input processing to reduce maintenance burden, and enhanced epluspsz output management with better configurability and reporting. Also implemented targeted stability and maintenance improvements to reduce misconfigurations and unnecessary I/O. The work lays a stronger foundation for reliable energy simulations and easier future evolution.
October 2025
8 Commits • 3 Features
Oct 1, 2025October 2025 focused on strengthening simulation fidelity, streamlining input handling, and improving output configurability for EnergyPlus (NREL/EnergyPlus). Delivered three core features with clear business value: improved modeling accuracy for VRF reverse cycle defrost, streamlined heat-pump input processing to reduce maintenance burden, and enhanced epluspsz output management with better configurability and reporting. Also implemented targeted stability and maintenance improvements to reduce misconfigurations and unnecessary I/O. The work lays a stronger foundation for reliable energy simulations and easier future evolution.
September 2025
17 Commits • 2 Features
Sep 1, 20252025-09 monthly summary for NREL/EnergyPlus: Implemented energy-optimized Ice Thermal Storage sizing with autosizing clarifications, corrected on-peak energy calculations, and enhanced telemetry/reporting, including peak-hour TES activation and chiller operation adjustments. Delivered WSHP sizing reporting improvements with meaningful-diff logging and accompanying unit tests. Substantially improved code quality and stability through comprehensive compiler-warnings cleanup in IceThermalStorage and related modules. Fixed Exhaust Air System scheduling usage and expanded unit tests to cover dynamic adjustments. Hardened energy coil handling with robustness for coil-not-found scenarios to prevent crashes. These efforts reduce energy waste, improve modeling accuracy, and increase maintainability, risk reduction, and operation reliability.
17 Commits • 2 Features
Sep 1, 20252025-09 monthly summary for NREL/EnergyPlus: Implemented energy-optimized Ice Thermal Storage sizing with autosizing clarifications, corrected on-peak energy calculations, and enhanced telemetry/reporting, including peak-hour TES activation and chiller operation adjustments. Delivered WSHP sizing reporting improvements with meaningful-diff logging and accompanying unit tests. Substantially improved code quality and stability through comprehensive compiler-warnings cleanup in IceThermalStorage and related modules. Fixed Exhaust Air System scheduling usage and expanded unit tests to cover dynamic adjustments. Hardened energy coil handling with robustness for coil-not-found scenarios to prevent crashes. These efforts reduce energy waste, improve modeling accuracy, and increase maintainability, risk reduction, and operation reliability.
September 2025
August 2025
27 Commits • 10 Features
Aug 1, 2025August 2025 performance summary for NREL/EnergyPlus: Delivered substantial HVAC system enhancements, stability fixes, and build-system refinements. Key features delivered include AirLoopHVAC Unitary Heat Pump with MultiSpeed support, DOAS coil conditional logic, TES tank sizing enhancements with autosizing, and expanded output/reporting capabilities with updated IO references and Eng. Ref alignment. Build-system updates added new example files to extend build coverage. Major bug fixes include multispeed logic faults, transition program issues, unit test failures, and epluspsz reporting logic refinements. Code quality and robustness improvements and refactoring contributed to maintainability and reliability, enabling faster development and clearer reporting.
August 2025
27 Commits • 10 Features
Aug 1, 2025August 2025 performance summary for NREL/EnergyPlus: Delivered substantial HVAC system enhancements, stability fixes, and build-system refinements. Key features delivered include AirLoopHVAC Unitary Heat Pump with MultiSpeed support, DOAS coil conditional logic, TES tank sizing enhancements with autosizing, and expanded output/reporting capabilities with updated IO references and Eng. Ref alignment. Build-system updates added new example files to extend build coverage. Major bug fixes include multispeed logic faults, transition program issues, unit test failures, and epluspsz reporting logic refinements. Code quality and robustness improvements and refactoring contributed to maintainability and reliability, enabling faster development and clearer reporting.
July 2025
7 Commits • 3 Features
Jul 1, 2025July 2025: Delivered major heat pump sizing enhancements with Manual S alignment and updated reporting in EnergyPlus, supported by revised tests. Updated IDD coverage for coil objects, added a new Coil:DX:ASHRAE205:Performance type, and refined heat pump performance parameter naming. Reverted a prior heating coil sizing IDD change to preserve previous configuration. Improved user guidance with documentation updates and expanded thermostat setpoint warnings, with broader test coverage and new test files.
7 Commits • 3 Features
Jul 1, 2025July 2025: Delivered major heat pump sizing enhancements with Manual S alignment and updated reporting in EnergyPlus, supported by revised tests. Updated IDD coverage for coil objects, added a new Coil:DX:ASHRAE205:Performance type, and refined heat pump performance parameter naming. Reverted a prior heating coil sizing IDD change to preserve previous configuration. Improved user guidance with documentation updates and expanded thermostat setpoint warnings, with broader test coverage and new test files.
July 2025
May 2025
1 Commits • 1 Features
May 1, 2025Concise month summary for 2025-05 for NREL/EnergyPlus focusing on the Heat Pump Coil Sizing Standardization initiative. Completed design proposal and design document to standardize coil sizing across equipment types. Created specifications for new input fields to select coil sizing methods and a heating-to-cooling load ratio. Documented justification, approach, and code areas to modify, establishing a clear path for future implementation. Prepared implementation roadmap and identified impacted modules to enable seamless integration with existing coil sizing logic. Commit reference: f12842c38aaa6d36e0c656521b1aef98cf7b238a.
May 2025
1 Commits • 1 Features
May 1, 2025Concise month summary for 2025-05 for NREL/EnergyPlus focusing on the Heat Pump Coil Sizing Standardization initiative. Completed design proposal and design document to standardize coil sizing across equipment types. Created specifications for new input fields to select coil sizing methods and a heating-to-cooling load ratio. Documented justification, approach, and code areas to modify, establishing a clear path for future implementation. Prepared implementation roadmap and identified impacted modules to enable seamless integration with existing coil sizing logic. Commit reference: f12842c38aaa6d36e0c656521b1aef98cf7b238a.
April 2025
11 Commits • 3 Features
Apr 1, 2025April 2025 performance summary for NREL/EnergyPlus focused on stability, readability, and performance improvements across mixed-air handling, unit tests, and core HVAC components. The month delivered notable feature work, targeted bug fixes, and code quality enhancements that reduce maintenance risk and improve simulation accuracy and developer velocity.
11 Commits • 3 Features
Apr 1, 2025April 2025 performance summary for NREL/EnergyPlus focused on stability, readability, and performance improvements across mixed-air handling, unit tests, and core HVAC components. The month delivered notable feature work, targeted bug fixes, and code quality enhancements that reduce maintenance risk and improve simulation accuracy and developer velocity.
April 2025
March 2025
1 Commits
Mar 1, 2025March 2025 performance summary for NREL/EnergyPlus focused on a critical bug fix to heat recovery identification in WWHP systems. Delivered a precise loop-logic correction that improves the accuracy of heat recovery detection, reducing misclassification in energy modeling and supporting more reliable energy simulations.
March 2025
1 Commits
Mar 1, 2025March 2025 performance summary for NREL/EnergyPlus focused on a critical bug fix to heat recovery identification in WWHP systems. Delivered a precise loop-logic correction that improves the accuracy of heat recovery detection, reducing misclassification in energy modeling and supporting more reliable energy simulations.
February 2025
2 Commits
Feb 1, 2025February 2025 monthly summary focusing on bug fixes and reliability improvements that enhance sizing accuracy and log stability for NREL/EnergyPlus.
2 Commits
Feb 1, 2025February 2025 monthly summary focusing on bug fixes and reliability improvements that enhance sizing accuracy and log stability for NREL/EnergyPlus.
February 2025
January 2025
1 Commits • 1 Features
Jan 1, 2025January 2025 performance-focused summary for NREL/EnergyPlus. Delivered a non-functional but performance-oriented refactor to the TDMA function arguments, switching from value passing to reference passing for c and d to improve memory management and enable potential in-place modification. No new features were released; the change preserves existing behavior. This work reduces unnecessary copies, improves scalability for large simulations, and sets up future optimization opportunities.
January 2025
1 Commits • 1 Features
Jan 1, 2025January 2025 performance-focused summary for NREL/EnergyPlus. Delivered a non-functional but performance-oriented refactor to the TDMA function arguments, switching from value passing to reference passing for c and d to improve memory management and enable potential in-place modification. No new features were released; the change preserves existing behavior. This work reduces unnecessary copies, improves scalability for large simulations, and sets up future optimization opportunities.
December 2024
55 Commits • 9 Features
Dec 1, 2024December 2024 (NREL/EnergyPlus): Delivered substantial reliability, readability, and performance improvements through targeted refactors, bug fixes, and numerical stability enhancements. Key efforts included code reduction/cleanup, alignment of sizing logic with OA controller maximum, introduction of peak timing capture, and widespread const-correctness and efficiency improvements. These changes reduce maintenance costs, improve simulation accuracy, and lay groundwork for faster, safer future development.
55 Commits • 9 Features
Dec 1, 2024December 2024 (NREL/EnergyPlus): Delivered substantial reliability, readability, and performance improvements through targeted refactors, bug fixes, and numerical stability enhancements. Key efforts included code reduction/cleanup, alignment of sizing logic with OA controller maximum, introduction of peak timing capture, and widespread const-correctness and efficiency improvements. These changes reduce maintenance costs, improve simulation accuracy, and lay groundwork for faster, safer future development.
December 2024
November 2024
52 Commits • 10 Features
Nov 1, 2024November 2024 (NREL/EnergyPlus) delivered core plant EIR heat pump functionality, improved sizing accuracy, expanded test coverage, and strengthened code quality. Key deliverables include a new plant EIR HPs function, revised OA system fan sizing methodology, and added unit tests, complemented by CppCheck suppression updates and extensive code cleanup/refactor to improve maintainability. Major bug fixes reduced runtime crashes and addressed shadowing/const-argument issues across modules. These changes reduce risk of incorrect energy modeling results, improve reliability, and speed future development through better testability and cleaner code.
November 2024
52 Commits • 10 Features
Nov 1, 2024November 2024 (NREL/EnergyPlus) delivered core plant EIR heat pump functionality, improved sizing accuracy, expanded test coverage, and strengthened code quality. Key deliverables include a new plant EIR HPs function, revised OA system fan sizing methodology, and added unit tests, complemented by CppCheck suppression updates and extensive code cleanup/refactor to improve maintainability. Major bug fixes reduced runtime crashes and addressed shadowing/const-argument issues across modules. These changes reduce risk of incorrect energy modeling results, improve reliability, and speed future development through better testability and cleaner code.
Activity
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Quality Metrics
Correctness88.2%
Maintainability89.0%
Architecture81.4%
Performance78.4%
AI Usage20.2%
Skills & Technologies
Programming Languages
BatchC++CMakeFortranIDFLaTeXMarkdownTeXYAMLidd
Technical Skills
Airflow SizingAutosizingAutosizing LogicBug FixBug FixingBuild System ConfigurationBuild SystemsBuilding Performance SimulationC++C++ DevelopmentC++ Standard LibraryC++ developmentC++ programmingCI/CDClean Code
Repositories Contributed To
Overview of all repositories you've contributed to across your timeline