NeqSim is a library for calculation of fluid behavior, phase equilibrium and process simulation
This repository also configures its own agents. See what neqsim tells them →
Skill Claude CodeCodex needs its repo
Equipment and process CAPEX estimation - Turton/Peters/Seider correlations, CEPCI escalation, material/pressure factors, bare-module to grass-roots, AACE class 1-5, location and currency factors, mechanical-design-driven topsides/SURF/well rollups. USE WHEN: a task needs a Class 3/4 estimate for equipment, a…
Skill Claude CodeCodex
Field development workflows, concept selection, and integrated project evaluation using NeqSim. USE WHEN: performing field development studies, concept screening, tieback analysis, production forecasting, or integrated field planning. Covers the full lifecycle from discovery through operations with NeqSim's field…
Skill Claude CodeCodex
Oil & gas field economics, NPV, IRR, cash flow, and fiscal regime modeling with NeqSim. USE WHEN: calculating project economics (NPV, IRR, payback), evaluating tax regimes (Norwegian NCS, UK, generic), building cost estimates (CAPEX/OPEX), or running Monte Carlo sensitivity analysis on economic outcomes.
Skill Claude CodeCodex
Flow-accelerated corrosion and high-temperature pH in closed heating/cooling-medium loops - magnetite stability, wall thinning at bends and welds, wall shear, in-situ vs lab pH, Cr-Mo upgrade screening. USE WHEN: localised thinning or leaks at bends, elbows or welds in carbon-steel tubing; a glycol/water…
Skill Claude CodeCodex
Flow assurance patterns for NeqSim. USE WHEN: predicting hydrate, wax, asphaltene, CO2/H2S corrosion (NORSOK M-506), mineral scale and brine mixing, valve scale drift and remediation, sulfur S8 deposition, metal-loss screening, pipeline hydraulics, DNV-RP-F109/F105/F104/F110/F114 screening, water hammer, slug flow…
Skill Claude CodeCodex
Structured hazard identification - IEC 61882 HAZOP worksheets with deviation-to-NeqSim-calculator mapping, FMEA with RPN scoring, event trees, fault trees with beta-factor common cause and minimal cut sets, escalation (domino) screening. USE WHEN: a task needs systematic hazard identification, quantified HAZOP/HAZID…
Skill Claude CodeCodex
Pinch analysis and heat integration — composite curves, ΔTmin selection, MER targeting, grand composite, HEN synthesis, retrofit. USE WHEN: a task involves reducing utility cost, evaluating heat recovery, sizing utility duties, or comparing process alternatives on energy efficiency. Anchors on…
Skill Claude CodeCodex
Hydrogen production routes with NeqSim - SMR, ATR, POX, WGS, PSA, CO2 capture, electrolysis (PEM/Alkaline/SOEC/AEM), ammonia cracking, blue/green H2 flowsheets and plant cost. USE WHEN: modeling reformers, syngas generators, shift reactors, PSA, H2 drying/compression/export, electrolyzer I-V curves, para/ortho…
Skill Claude CodeCodex
Input validation rules for NeqSim simulations. USE WHEN: setting up thermodynamic systems, process equipment, or running simulations. Catches physically impossible or suspect inputs before simulation runs, saving time and providing corrective guidance.
Skill Claude CodeCodex
Java 8 compatibility rules for NeqSim. USE WHEN: writing or reviewing any Java code for NeqSim, including tests. Covers forbidden Java 9+ features, replacement patterns, API verification, and JavaDoc requirements. All NeqSim Java code MUST compile with Java 8.
Skill Claude CodeCodex
Literature and web research workflow for NeqSim tasks. USE WHEN: a task needs papers, standards, textbook or benchmark data, or background from the open web, stored and summarized so it is reusable. Saves papers to references/literature/ and web extracts to references/web/, writes literaturefindings.md (claims…
Skill Claude CodeCodex
Model calibration and data reconciliation workflow for NeqSim digital twins. USE WHEN: reducing model-vs-plant mismatch, tuning process model parameters from historian data, reconciling noisy measurements, or building validation reports for calibrated simulations. Covers tag mapping, data quality gates, steady-state…
Skill Claude CodeCodex needs its repo
Jupyter notebook patterns for NeqSim. USE WHEN: creating or reviewing Jupyter notebooks that use NeqSim for process simulation, thermodynamics, or PVT analysis. Covers devtools workspace setup, class imports, notebook structure, visualization requirements, and results.json schema.
Skill Claude CodeCodex
Flowsheet optimization and Design of Experiments with NeqSim's built-in stack - SQP, Particle Swarm, Nelder-Mead, ProductionOptimizer, MultiObjectiveOptimizer (Pareto), BatchStudy sweeps, MonteCarloSimulator, ProcessSimulationEvaluator for SciPy/Pyomo. USE WHEN: minimize/maximize over decision variables, sensitivity…
Skill Claude CodeCodex
OCR-based text extraction from PDFs (scanned documents, P&IDs, vendor datasheets, engineering drawings) using OCRmyPDF, Tesseract, and pytesseract. USE WHEN: a PDF has no embedded text layer (scanned), pymupdf returns empty/low text, or the user explicitly asks to extract text/tags from a P&ID, mechanical drawing, or…
Skill Claude CodeCodex
Generate, plot, interpret, validate, and troubleshoot NeqSim PT phase envelopes. USE WHEN: calculating phase envelopes, dew and bubble curves, cricondenbar, cricondentherm, critical points, retrograde regions, envelope segments, or fixing Michelsen continuation and singular-Jacobian failures caused by zero or trace…
Skill Claude CodeCodex
Physics explanations for common NeqSim results. USE WHEN: users ask 'why' about simulation results, when explaining unexpected behavior, or when adding educational context to notebooks and reports. Maps common engineering phenomena to plain-language explanations.
Skill Claude CodeCodex
Bidirectional P&ID/NeqSim workflow. USE WHEN: understanding P&ID symbols, converting P&ID topology into NeqSim simulations, generating governed DEXPI engineering packages from ProcessSystem or ProcessModel, linking tags to historian data, evaluating valve/equipment changes, or preparing water-hammer and blowdown/flare…
Skill Claude CodeCodex
Educational as-built pipeline survey processing: raw KP/depth/seabed/coordinate rows to a cleaned, sign-normalised pipeline profile with flagged points, free-span and cover candidates, repeat-survey comparison, processing log and a NeqSim-ready elevation profile. USE WHEN: a task needs a screening-level pipeline…
Skill Claude CodeCodex
Connecting NeqSim simulations to plant historian data via tagreader. USE WHEN: reading OSIsoft PI or Aspen IP.21 data, building equipment tag maps, comparing simulated vs measured values, running digital-twin loops, or extracting event windows for water-hammer screening. Covers tagreader API, tag mapping, data…
Skill Claude CodeCodex
Production platform topside modeling patterns for NeqSim (FPSO, fixed, semi-sub). USE WHEN: building full topside models from design documents, P&IDs or operating data - TBP-fraction fluids, multi-stage separation with recycles, recompression with compressor curves and anti-surge, export/injection compression, oil…
Skill Claude CodeCodex
Power generation patterns for NeqSim. USE WHEN: modeling gas turbines, steam turbines, HRSG, combined cycle systems, waste heat recovery, or calculating fuel gas consumption and thermal efficiency. Covers GasTurbine, SteamTurbine, HRSG, CombinedCycleSystem classes and heat integration with PinchAnalysis.
Skill Claude CodeCodex
Extracts process simulation data from unstructured sources (text, tables, PFDs, data sheets, STID/E3D line lists) and converts it to NeqSim JSON builder format or PipingRouteBuilder route models. USE WHEN: a user provides a process description, PFD, operating data, line-list table, or design document and wants a…
Skill Claude CodeCodex
Process modeling and flowsheet construction patterns for NeqSim. USE WHEN: building executable NeqSim process simulations, ProcessSystem flowsheets, or runnable process models with streams, separators, compressors, heat exchangers, valves, pumps, distillation columns, recycles, adjusters, topology checks, result…
At most 3 mods per repository are shown here, and a mod shipped inside a plugin is left to that plugin's page — the rest are on their repository pages: