CoolProp/CoolProp

Health v2 · maintenance only

Adoption not part of the score

1067 stars · 382 forks observed · 2026-09-03

What it is AI-extracted, prompt v1, taxonomy v1, 2026-08-30, confidence not recorded

CoolProp is an open-source C++ library providing thermophysical property data for pure fluids, mixtures, incompressible fluids, and brines, with wrappers for many languages including Python, MATLAB, Java, C#, and Excel. It offers functionality similar to NIST REFPROP but free and permissively licensed under MIT.

Use cases

• look up thermodynamic properties of refrigerants like R134a
• compute water and steam properties with IAPWS-IF97
• calculate humid air and psychrometric properties
• model mixture properties with Helmholtz energy equations of state
• get fluid transport properties like viscosity and thermal conductivity in Python
• replace REFPROP with a free open-source fluid property library
• simulate heat pump and HVAC cycles with fluid property calls

When to choose

• you need accurate thermophysical fluid properties across many programming environments
• you want a free, commercially usable alternative to NIST REFPROP
• you need fast tabular interpolation for large-scale simulations
• you work with psychrometrics, brines, or incompressible fluids

When to avoid

• you need experimental data or properties for fluids not in the database
• you require certified reference-grade accuracy for legal or metrological purposes
• you need a GUI-based property calculator rather than a library

Facets

library · maturity stable

simulation math sdk simulation cross-platform cpp python cross-platform windows thermophysical-properties equations-of-state fluid-properties refprop-alternative psychrometrics helmholtz-energy steam-tables engineering thermodynamics linux macos

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