The top 5 natural gas properties plugins and add-ins for engineering software are NIST REFPROP (Excel Add-In), GasCalc (SmartSim), AQUAlibrium, GASPAK, and DWSIM Property Package Plugins.
Engineers rely on these specialized plugins to calculate critical thermodynamic and transport properties—such as compressibility factors (
-factor), enthalpy, viscosity, and phase envelopes—directly inside host environments like Microsoft Excel, MATLAB, or process simulators. Summary Comparison Plugin / Add-In Primary Host Software Core Standards / Models NIST REFPROP Excel, MATLAB, Python High-precision scientific mixtures GERG-2008, AGA8, Helmholtz GasCalc Microsoft Excel Grid operators and energy billing ISO 6976, AGA8, GERG AQUAlibrium Custom CAD / Process Engines Sour gas & aqueous gas networks Specialized H2Scap H sub 2 cap S CO2cap C cap O sub 2 /Water models GASPAK Excel, C++, Fortran Rapid multi-fluid phase calculations Fundamental Equations of State DWSIM CAPE-OPEN Excel, Third-party Flowsheets Open-source process simulation Peng-Robinson, SRK, Lee-Kesler 1. NIST REFPROP (Excel Add-In) Software Library – Gas Liquids Engineering
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