Refprop 9 — Nist

REFPROP (Reference Fluid Thermodynamic and Transport Properties) is a NIST-maintained software library and database that provides high-accuracy thermophysical property models for pure fluids and mixtures. Version 9 is a widely used release that implements equations of state, transport property correlations, and mixture models intended for engineering and research applications where precision matters (HVAC, refrigeration, power cycles, cryogenics, process simulation, and scientific studies).

REFPROP 9 significantly expanded its library. It includes thermodynamic properties for over 120 pure fluids. These range from standard industrial gases (Nitrogen, Oxygen, Argon) and hydrocarbons (Methane, Propane) to environmentally friendly refrigerants (R-134a, R-410A, CO2) and cryogens. nist refprop 9

: It calculates thermodynamic properties (such as density, enthalpy, and entropy) and transport properties (viscosity and thermal conductivity) for pure fluids and mixtures. Advanced Modeling It includes thermodynamic properties for over 120 pure

: It predicts over 40 properties, such as density, enthalpy, entropy, heat capacity, viscosity, thermal conductivity, surface tension, and speed of sound. Advanced Modeling : It predicts over 40 properties,

The temperature gauge held at 112.01 K. The pressure at 449.9 kPa.

: It provides high-accuracy data for thermodynamic properties (density, enthalpy, entropy) and transport properties (viscosity, thermal conductivity). Phase Coverage