Nist Refprop 9 Direct

Employed for fluids with limited experimental data.

NIST REFPROP 9: The Industry Standard for Fluid Properties (Reference Fluid Thermodynamic and Transport Properties) is a specialized software program developed by the National Institute of Standards and Technology (NIST) to predict the thermophysical properties of industrially important fluids and their mixtures. While newer versions like REFPROP 10.0 have since been released, version 9.0 remains a cornerstone in engineering and research due to its stability, extensive fluid library, and high-accuracy models. Core Capabilities and Features nist refprop 9

Calculations for vapor-liquid (VLE), liquid-liquid, and solid-liquid systems. Employed for fluids with limited experimental data

Version 9.0 introduced updated equations of state for fluids like cyclopentane, R-1234yf, and R-1234ze(E), and expanded the number of binary mixtures with interaction parameters from 303 to 639. Technical Architecture Used for specific international standard equations, such as

This is the primary model for most pure fluids, allowing for the computation of all equilibrium properties.

Used for specific international standard equations, such as R-123.

The software is built on several high-accuracy mathematical models to ensure reliability: