equinor/ecalc
Nov 2024 – Sep 2025
9 Months active
Languages Used
JavaMarkdownPythonCSVYAML
Technical Skills
Algorithm RefactoringBackend DevelopmentCode RefactoringCompressor ModelingData StructuresDependency Management
Ole Petter Lødøen
PROFILE
Ole Petter Lødøen
Over nine months, Opl contributed to the equinor/ecalc repository by engineering robust enhancements to compressor and pump simulation models, focusing on reliability, maintainability, and data integrity. Opl refactored time-series processing and compressor evaluation logic using Python and NumPy, consolidating algorithms for rate calculations and stage handling to reduce duplication and edge-case errors. The work included upgrading the NeqSim simulation library, improving documentation, and strengthening input validation and configuration management with YAML. By unifying chart models and modernizing the codebase, Opl enabled more accurate reporting and easier onboarding, demonstrating depth in backend development, numerical methods, and software architecture.
Overall Statistics
Feature vs Bugs
77%Features
Repository Contributions
46Total
Bugs
5
Commits
46
Features
17
Lines of code
41,036
Activity Months9
Your Network
83 people
Work History
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
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Quality Metrics
Correctness90.8%
Maintainability89.0%
Architecture85.8%
Performance80.2%
AI Usage20.0%
Skills & Technologies
Programming Languages
CSVJavaMarkdownPythonYAML
Technical Skills
Algorithm DesignAlgorithm OptimizationAlgorithm RefactoringBackend DevelopmentBug FixCode CleanupCode ConsolidationCode OrganizationCode RefactoringCode SimplificationCompressor ModelingConfiguration ManagementData AnalysisData EngineeringData Handling
Repositories Contributed To
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