equinor/ecalc
Nov 2024 – Mar 2026
15 Months active
Languages Used
JavaMarkdownPythonCSVYAML
Technical Skills
Algorithm RefactoringBackend DevelopmentCode RefactoringCompressor ModelingData StructuresDependency Management
Ole Petter Lødøen
PROFILE
Ole Petter Lødøen
Over 15 months, contributed to the equinor/ecalc repository by engineering robust backend features and refining compressor and pump simulation models. Leveraged Python and YAML to deliver modular, maintainable architectures for time-series processing, fluid dynamics, and compressor train evaluation. Applied algorithm design, object-oriented programming, and rigorous testing to improve reliability, data integrity, and performance across calculation pipelines. Enhanced API usability, documentation, and configuration safety while reducing technical debt through targeted refactoring and dependency upgrades. Addressed edge-case bugs and implemented validation to ensure safe, predictable operation. The work enabled more accurate simulations, streamlined onboarding, and supported scalable, future-ready engineering workflows.
Overall Statistics
Feature vs Bugs
79%Features
Repository Contributions
86Total
Bugs
8
Commits
86
Features
31
Lines of code
61,903
Activity Months15
Your Network
89 peopleWork History
March 2026
12 Commits • 4 Features
Mar 1, 2026Month 2026-03 — Monthly summary for equinor/ecalc Key features delivered: - ASV Solvers and Pressure Control Enhancements: Implemented a trio of ASV solvers (individual_asv_rate, individual_asv_pressure, common_asv) with improved outlet pressure handling, solver robustness, and configurable behavior. Added failure-event reporting and extensive tests comparing new vs legacy implementations. - Gas Compressor Integration: Introduced GasCompressor as a concrete process unit and refactored the legacy Compressor to LegacyCompressor, with tests and solver integration. - MultiPressureSolver for Segmented Compressor Trains: Added MultiPressureSolver to manage multiple outlet pressure targets on shared shafts, enabling independent target control across segments. - Mixer and Splitter Refactor with Single-Stream Variants: Refactored Mixer/Splitter into Legacy variants and introduced new single-stream ProcessUnit variants for clearer, modular process unit handling. - Architectural and configuration improvements: get_configuration added to Solution; extracted Configurations and SimulationUnitId from ProcessRunner to break import cycles; introduced OperatingConfiguration as a union of speed-, choke-, and recircconfigurations. Major bugs fixed: - Stability and boundary issues in upstream choke handling: fixed RateTooHighError crash by wrapping calls in outlet_pressure() and returning 0.0 to enable convergence. - Recirculation boundary and success flag fixes: stabilized boundary by resetting recirculation per loop and corrected success flag logic for multiple strategies; added regression tests. - Solver envelope and edge-case handling: fixed failures when rate exceeded chart stonewall or fell outside chart envelope, ensuring solutions report failure gracefully rather than crashing. Overall impact and accomplishments: - Significantly increased solver robustness and reliability for complex compressor trains, enabling more accurate and safe control across ASV solvers and pressure targets. - Improved test coverage and traceability with regression tests and structured failure events, improving maintainability and ease of debugging. - Enhanced modularity and maintainability through targeted refactors, enabling easier extension of strategies and new process units. Technologies/skills demonstrated: - Python-based solver development, test-driven development, and regression testing. - Architectural refactoring and clean code practices (import cycle reduction, configuration modeling, and unified configuration types). - Process-unit design and integration patterns (GasCompressor, LegacyCompressor, single-stream Mixer/Splitter variants). - Failure-event modeling and traceability for better operational insight and debugging.
12 Commits • 4 Features
Mar 1, 2026Month 2026-03 — Monthly summary for equinor/ecalc Key features delivered: - ASV Solvers and Pressure Control Enhancements: Implemented a trio of ASV solvers (individual_asv_rate, individual_asv_pressure, common_asv) with improved outlet pressure handling, solver robustness, and configurable behavior. Added failure-event reporting and extensive tests comparing new vs legacy implementations. - Gas Compressor Integration: Introduced GasCompressor as a concrete process unit and refactored the legacy Compressor to LegacyCompressor, with tests and solver integration. - MultiPressureSolver for Segmented Compressor Trains: Added MultiPressureSolver to manage multiple outlet pressure targets on shared shafts, enabling independent target control across segments. - Mixer and Splitter Refactor with Single-Stream Variants: Refactored Mixer/Splitter into Legacy variants and introduced new single-stream ProcessUnit variants for clearer, modular process unit handling. - Architectural and configuration improvements: get_configuration added to Solution; extracted Configurations and SimulationUnitId from ProcessRunner to break import cycles; introduced OperatingConfiguration as a union of speed-, choke-, and recircconfigurations. Major bugs fixed: - Stability and boundary issues in upstream choke handling: fixed RateTooHighError crash by wrapping calls in outlet_pressure() and returning 0.0 to enable convergence. - Recirculation boundary and success flag fixes: stabilized boundary by resetting recirculation per loop and corrected success flag logic for multiple strategies; added regression tests. - Solver envelope and edge-case handling: fixed failures when rate exceeded chart stonewall or fell outside chart envelope, ensuring solutions report failure gracefully rather than crashing. Overall impact and accomplishments: - Significantly increased solver robustness and reliability for complex compressor trains, enabling more accurate and safe control across ASV solvers and pressure targets. - Improved test coverage and traceability with regression tests and structured failure events, improving maintainability and ease of debugging. - Enhanced modularity and maintainability through targeted refactors, enabling easier extension of strategies and new process units. Technologies/skills demonstrated: - Python-based solver development, test-driven development, and regression testing. - Architectural refactoring and clean code practices (import cycle reduction, configuration modeling, and unified configuration types). - Process-unit design and integration patterns (GasCompressor, LegacyCompressor, single-stream Mixer/Splitter variants). - Failure-event modeling and traceability for better operational insight and debugging.
March 2026
February 2026
3 Commits • 1 Features
Feb 1, 2026February 2026 monthly summary focusing on technical debt reduction and maintainability gains in the ecalc codebase. Delivered a targeted codebase refactor to unify fluid processing under a common ProcessUnit and centralize propagation, improving consistency and future ready for enhancements. No explicit bug fixes were logged this month; the architectural changes mitigate potential regressions and set a stable foundation for feature delivery. Key outcomes: - Key features delivered: Codebase refactor unifying fluid processing under ProcessUnit with centralized propagate_stream to handle liquid removal, choke/pressure, and temperature settings. - Major bugs fixed: None explicitly logged; refactor mitigates known inconsistencies and reduces duplication across fluid streams. - Overall impact and accomplishments: Improved maintainability, consistency, and future-proofing of fluid processing; reduced technical debt and easier onboarding for new features. - Technologies/skills demonstrated: Python OOP, inheritance, modular design, refactoring discipline, and commit-traceable changes (issues #1371–#1373).
February 2026
3 Commits • 1 Features
Feb 1, 2026February 2026 monthly summary focusing on technical debt reduction and maintainability gains in the ecalc codebase. Delivered a targeted codebase refactor to unify fluid processing under a common ProcessUnit and centralize propagation, improving consistency and future ready for enhancements. No explicit bug fixes were logged this month; the architectural changes mitigate potential regressions and set a stable foundation for feature delivery. Key outcomes: - Key features delivered: Codebase refactor unifying fluid processing under ProcessUnit with centralized propagate_stream to handle liquid removal, choke/pressure, and temperature settings. - Major bugs fixed: None explicitly logged; refactor mitigates known inconsistencies and reduces duplication across fluid streams. - Overall impact and accomplishments: Improved maintainability, consistency, and future-proofing of fluid processing; reduced technical debt and easier onboarding for new features. - Technologies/skills demonstrated: Python OOP, inheritance, modular design, refactoring discipline, and commit-traceable changes (issues #1371–#1373).
January 2026
7 Commits • 1 Features
Jan 1, 2026January 2026 monthly summary for equinor/ecalc: Delivered robust numerical stability improvements and a cleaner architecture for fluid streams and compressor trains, with measurable business value through increased reliability, scalability, and maintainability.
7 Commits • 1 Features
Jan 1, 2026January 2026 monthly summary for equinor/ecalc: Delivered robust numerical stability improvements and a cleaner architecture for fluid streams and compressor trains, with measurable business value through increased reliability, scalability, and maintainability.
January 2026
December 2025
3 Commits • 2 Features
Dec 1, 2025Monthly summary for 2025-12: Focused on improving time-series data integrity and the robustness of the fluid dynamics simulation. Delivered a bug fix to enforce end-date-after-start-date in time series vectors, introduced splitter and mixer units in the compressor stage to enable more expressive fluid processing, and enhanced time-series resampling with improved rate interpolation and added tests. These changes reduce data-quality risks, enable more accurate simulations, and strengthen test coverage, contributing to more reliable analytics and better performance.
December 2025
3 Commits • 2 Features
Dec 1, 2025Monthly summary for 2025-12: Focused on improving time-series data integrity and the robustness of the fluid dynamics simulation. Delivered a bug fix to enforce end-date-after-start-date in time series vectors, introduced splitter and mixer units in the compressor stage to enable more expressive fluid processing, and enhanced time-series resampling with improved rate interpolation and added tests. These changes reduce data-quality risks, enable more accurate simulations, and strengthen test coverage, contributing to more reliable analytics and better performance.
November 2025
9 Commits • 3 Features
Nov 1, 2025November 2025 performance summary for equinor/ecalc: Key architectural and quality improvements in the compressor domain. Delivered modularization of compressor train models and separation of fluid factory logic to improve maintainability, testability, and future extensibility. Implemented compressor chart handling improvements to increase chart accuracy and resilience, including support for two curves with bypassed validation and preserving original curves when applicable. Strengthened reliability with a maximum power check for simplified compressor trains to prevent exceeding defined power limits. Reduced technical debt through cleanup and removal of legacy modules and unused utilities. These changes collectively enhance system reliability, developer velocity, and confidence in production deployments.
9 Commits • 3 Features
Nov 1, 2025November 2025 performance summary for equinor/ecalc: Key architectural and quality improvements in the compressor domain. Delivered modularization of compressor train models and separation of fluid factory logic to improve maintainability, testability, and future extensibility. Implemented compressor chart handling improvements to increase chart accuracy and resilience, including support for two curves with bypassed validation and preserving original curves when applicable. Strengthened reliability with a maximum power check for simplified compressor trains to prevent exceeding defined power limits. Reduced technical debt through cleanup and removal of legacy modules and unused utilities. These changes collectively enhance system reliability, developer velocity, and confidence in production deployments.
November 2025
October 2025
6 Commits • 3 Features
Oct 1, 2025Monthly performance summary for 2025-10 (equinor/ecalc). This month focused on strengthening compressor configuration safety, modularizing compressor train internals, and standardizing shaft management to support future expansions. The work reduces risk from invalid configurations, improves operational clarity, and enhances testability and maintainability while delivering visible business value through safer, more predictable compressor behavior.
October 2025
6 Commits • 3 Features
Oct 1, 2025Monthly performance summary for 2025-10 (equinor/ecalc). This month focused on strengthening compressor configuration safety, modularizing compressor train internals, and standardizing shaft management to support future expansions. The work reduces risk from invalid configurations, improves operational clarity, and enhances testability and maintainability while delivering visible business value through safer, more predictable compressor behavior.
September 2025
15 Commits • 5 Features
Sep 1, 2025Concise monthly summary for 2025-09 focusing on business value and technical achievements for the equinor/ecalc project. Delivered features and robustness improvements that enhance reliability of pump and compressor models, improved data integrity, and modernized charting/architecture. Resulted in more accurate reporting, fewer edge-case errors, and a maintainable codebase aligned with current dependencies and best practices.
15 Commits • 5 Features
Sep 1, 2025Concise monthly summary for 2025-09 focusing on business value and technical achievements for the equinor/ecalc project. Delivered features and robustness improvements that enhance reliability of pump and compressor models, improved data integrity, and modernized charting/architecture. Resulted in more accurate reporting, fewer edge-case errors, and a maintainable codebase aligned with current dependencies and best practices.
September 2025
August 2025
5 Commits • 1 Features
Aug 1, 2025August 2025 — Equinor/ecalc delivered key reliability improvements and a library upgrade. Compressor-train fixes addressed dimension handling for rate-per-stream with single-date models, refactored zero-flow stage handling to avoid recirculation miscalculations, reduced fifth-decimal noise in standard-rate calculations, and corrected downstream pressure-control mapping from YAML to the domain model. NeqSim library upgraded to 3.0.38 with an updated binary jar. Impact: more reliable compressor simulations, fewer edge-case errors, and a maintainable dependency stack. Technologies demonstrated include domain modeling, refactoring, precision handling, YAML-domain mapping, and dependency management.
August 2025
5 Commits • 1 Features
Aug 1, 2025August 2025 — Equinor/ecalc delivered key reliability improvements and a library upgrade. Compressor-train fixes addressed dimension handling for rate-per-stream with single-date models, refactored zero-flow stage handling to avoid recirculation miscalculations, reduced fifth-decimal noise in standard-rate calculations, and corrected downstream pressure-control mapping from YAML to the domain model. NeqSim library upgraded to 3.0.38 with an updated binary jar. Impact: more reliable compressor simulations, fewer edge-case errors, and a maintainable dependency stack. Technologies demonstrated include domain modeling, refactoring, precision handling, YAML-domain mapping, and dependency management.
June 2025
6 Commits • 1 Features
Jun 1, 2025June 2025 performance summary for equinor/ecalc. Focused on delivering performance improvements, data correctness, and API usability enhancements to support reliable downstream decision-making.
6 Commits • 1 Features
Jun 1, 2025June 2025 performance summary for equinor/ecalc. Focused on delivering performance improvements, data correctness, and API usability enhancements to support reliable downstream decision-making.
June 2025
May 2025
5 Commits • 1 Features
May 1, 2025May 2025: Delivered standardized compressor train evaluation across models in equinor/ecalc, introducing CompressorTrainEvaluationInput, centralizing stage evaluation logic, and boosting robustness and accuracy of single-step evaluations. Implemented stage-level evaluation by speed and target discharge pressure, enabling precise scenario analysis. Applied cross-train usage of the new input model across all compressor trains to reduce duplication and improve maintainability. Enhanced documentation for the variable-speed model to accelerate onboarding and future work. Fixed enthalpy calculation edge-case to support both scalar and array inputs for simplified trains, improving reliability. This work reduces risk, improves decision quality, and sets a solid foundation for future model extensions.
May 2025
5 Commits • 1 Features
May 1, 2025May 2025: Delivered standardized compressor train evaluation across models in equinor/ecalc, introducing CompressorTrainEvaluationInput, centralizing stage evaluation logic, and boosting robustness and accuracy of single-step evaluations. Implemented stage-level evaluation by speed and target discharge pressure, enabling precise scenario analysis. Applied cross-train usage of the new input model across all compressor trains to reduce duplication and improve maintainability. Enhanced documentation for the variable-speed model to accelerate onboarding and future work. Fixed enthalpy calculation edge-case to support both scalar and array inputs for simplified trains, improving reliability. This work reduces risk, improves decision quality, and sets a solid foundation for future model extensions.
April 2025
3 Commits • 2 Features
Apr 1, 2025April 2025 monthly summary for equinor/ecalc: Delivered robustness enhancements to the compressor performance calculation module, consolidating evaluation logic and clarifying the handling of stages across scenarios with/without intermediate pressure. Improved maintainability through targeted refactors and enhanced user-facing documentation for power adjustment factors.
3 Commits • 2 Features
Apr 1, 2025April 2025 monthly summary for equinor/ecalc: Delivered robustness enhancements to the compressor performance calculation module, consolidating evaluation logic and clarifying the handling of stages across scenarios with/without intermediate pressure. Improved maintainability through targeted refactors and enhanced user-facing documentation for power adjustment factors.
April 2025
March 2025
1 Commits
Mar 1, 2025March 2025 monthly summary for developer performance review. Focused on a critical bug fix in the energy management logic of the eCalc engine, improving safety, cost control, and reliability for compressor operations. Delivered a robust fix with accompanying test coverage and clear traceability to the codebase changes.
March 2025
1 Commits
Mar 1, 2025March 2025 monthly summary for developer performance review. Focused on a critical bug fix in the energy management logic of the eCalc engine, improving safety, cost control, and reliability for compressor operations. Delivered a robust fix with accompanying test coverage and clear traceability to the codebase changes.
February 2025
1 Commits • 1 Features
Feb 1, 2025February 2025: Documentation-focused month for equinor/ecalc. Key feature delivered: Comprehensive Time Series Documentation and Sidebar Navigation. Improved onboarding and usage clarity for time-series handling, including global start/end dates, period splitting, interpolation, and extrapolation, with examples and configuration details. Updated docs sidebar for easier navigation. No code changes beyond documentation; ready for reviewers. Impact: reduces ambiguity, accelerates adoption, supports ongoing maintenance. Skills demonstrated: technical writing, documentation tooling, version-controlled changes, collaboration with product/engineering.
1 Commits • 1 Features
Feb 1, 2025February 2025: Documentation-focused month for equinor/ecalc. Key feature delivered: Comprehensive Time Series Documentation and Sidebar Navigation. Improved onboarding and usage clarity for time-series handling, including global start/end dates, period splitting, interpolation, and extrapolation, with examples and configuration details. Updated docs sidebar for easier navigation. No code changes beyond documentation; ready for reviewers. Impact: reduces ambiguity, accelerates adoption, supports ongoing maintenance. Skills demonstrated: technical writing, documentation tooling, version-controlled changes, collaboration with product/engineering.
February 2025
January 2025
2 Commits • 2 Features
Jan 1, 2025Monthly summary for 2025-01 focused on delivering stability and cleanliness in the equinor/ecalc repository. Key work centered on stabilizing the NEQSim gateway for large/complex calculations and cleaning up obsolete documentation references, with all changes tracked in version control.
January 2025
2 Commits • 2 Features
Jan 1, 2025Monthly summary for 2025-01 focused on delivering stability and cleanliness in the equinor/ecalc repository. Key work centered on stabilizing the NEQSim gateway for large/complex calculations and cleaning up obsolete documentation references, with all changes tracked in version control.
November 2024
8 Commits • 4 Features
Nov 1, 20242024-11 Monthly Summary for equinor/ecalc: Focused on delivering business value through reliability, maintainability, and user-facing improvements in time-series processing, charting, and simulation integration. Highlights below cover four core areas: key features delivered, major bugs fixed, overall impact, and technologies demonstrated. 1) Key features delivered - Time series resampling and fill-values enhancement: Refactored TimeSeriesRate and related consumer logic; consolidated resampling functionalities and introduced fill_values_for_new_periods to handle filling during resampling for new periods, improving clarity and maintainability across components. (Commit: c435999d24ee2615b440154e76e0fdb1f807e9b1) - Charting control margin requirement update: Made control margin a required setting for certain chart types and removed the experimental warning, aligning chart generation behavior with current UX expectations. (Commit: 45ad389b7f3538d1ae8e15a2d2158ec482f028d9) - NeqSim library upgrade to 3.0.5: Upgraded NeqSim from 2.5.21 to 3.0.5 and updated Python wrapper imports to reflect library structure changes, ensuring compatibility with the latest simulation engine. (Commit: e2bef51dc8a9ed1ef4e7abe26a7060802d04e3d0) - Documentation update: Added an image to compressor chart docs illustrating surge line, control margin, and stonewall to improve user understanding. (Commit: cdf301b950d82985ceb5c825c8382a1e5126e2b1) 2) Major bugs fixed - Maximum standard rate calculation under multiple control modes and constraints: Replaced a fragile algorithm with a robust approach for compressor trains under UPSTREAM_CHOKE, DOWNSTREAM_CHOKE, and maximum power constraints; added tests to validate power and rate under constraints. (Commits include: c13ae303e8388b89abb42048b9a88640bb40cc26; 42ce56288328daa4b761d5a54c53b638edb8ae54; 962ce4202551af6d26923df2e4011ea3f0e8fb9e; c22aaaf2bce217ec357db9e4f198bbe55908ebcf) 3) Overall impact and accomplishments - Improved reliability and correctness of time-series processing and rate calculations, reducing risk in production and enabling more predictable planning and optimization under varying control constraints. - Enhanced user experience through clarified chart behavior and richer documentation visuals, facilitating faster adoption and fewer support questions. - Strengthened engineering practices with a library upgrade and added tests, contributing to long-term maintainability and compatibility with the latest simulation engine. 4) Technologies and skills demonstrated - Python refactoring and consolidation of time-series processing logic. - Robust algorithm design and test-driven validation for constraint-based rate calculations. - Dependency management and library integration (NeqSim 3.0.5) and wrapper adaptation. - Documentation best practices and visual aids to improve user comprehension.
8 Commits • 4 Features
Nov 1, 20242024-11 Monthly Summary for equinor/ecalc: Focused on delivering business value through reliability, maintainability, and user-facing improvements in time-series processing, charting, and simulation integration. Highlights below cover four core areas: key features delivered, major bugs fixed, overall impact, and technologies demonstrated. 1) Key features delivered - Time series resampling and fill-values enhancement: Refactored TimeSeriesRate and related consumer logic; consolidated resampling functionalities and introduced fill_values_for_new_periods to handle filling during resampling for new periods, improving clarity and maintainability across components. (Commit: c435999d24ee2615b440154e76e0fdb1f807e9b1) - Charting control margin requirement update: Made control margin a required setting for certain chart types and removed the experimental warning, aligning chart generation behavior with current UX expectations. (Commit: 45ad389b7f3538d1ae8e15a2d2158ec482f028d9) - NeqSim library upgrade to 3.0.5: Upgraded NeqSim from 2.5.21 to 3.0.5 and updated Python wrapper imports to reflect library structure changes, ensuring compatibility with the latest simulation engine. (Commit: e2bef51dc8a9ed1ef4e7abe26a7060802d04e3d0) - Documentation update: Added an image to compressor chart docs illustrating surge line, control margin, and stonewall to improve user understanding. (Commit: cdf301b950d82985ceb5c825c8382a1e5126e2b1) 2) Major bugs fixed - Maximum standard rate calculation under multiple control modes and constraints: Replaced a fragile algorithm with a robust approach for compressor trains under UPSTREAM_CHOKE, DOWNSTREAM_CHOKE, and maximum power constraints; added tests to validate power and rate under constraints. (Commits include: c13ae303e8388b89abb42048b9a88640bb40cc26; 42ce56288328daa4b761d5a54c53b638edb8ae54; 962ce4202551af6d26923df2e4011ea3f0e8fb9e; c22aaaf2bce217ec357db9e4f198bbe55908ebcf) 3) Overall impact and accomplishments - Improved reliability and correctness of time-series processing and rate calculations, reducing risk in production and enabling more predictable planning and optimization under varying control constraints. - Enhanced user experience through clarified chart behavior and richer documentation visuals, facilitating faster adoption and fewer support questions. - Strengthened engineering practices with a library upgrade and added tests, contributing to long-term maintainability and compatibility with the latest simulation engine. 4) Technologies and skills demonstrated - Python refactoring and consolidation of time-series processing logic. - Robust algorithm design and test-driven validation for constraint-based rate calculations. - Dependency management and library integration (NeqSim 3.0.5) and wrapper adaptation. - Documentation best practices and visual aids to improve user comprehension.
November 2024
Activity
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Quality Metrics
Correctness91.8%
Maintainability87.4%
Architecture86.8%
Performance82.2%
AI Usage23.8%
Skills & Technologies
Programming Languages
CSVJavaMarkdownPythonYAML
Technical Skills
API developmentAlgorithm DesignAlgorithm OptimizationAlgorithm RefactoringBackend DevelopmentBug FixCode CleanupCode ConsolidationCode OrganizationCode RefactoringCode SimplificationCompressor ModelingConfiguration ManagementData AnalysisData Engineering
Repositories Contributed To
Overview of all repositories you've contributed to across your timeline