Refprop 9 | Nist

: Allows users to select pure fluids, pseudo-pure fluids, and predefined mixtures.

Before the widespread adoption of digital libraries like REFPROP, engineers relied on simplified generalized models (like the Peng-Robinson or Soave-Redlich-Kwong cubic equations of state) or physical steam tables. nist refprop 9

Temperature, pressure, density, enthalpy, entropy, internal energy, CV/CP (specific heat capacities), and speed of sound. Transport Properties: Viscosity and thermal conductivity. : Allows users to select pure fluids, pseudo-pure

REFPROP 9 includes data for over 100 pure fluids, including: Transport Properties: Viscosity and thermal conductivity

REFPROP 9 is designed to fit seamlessly into diverse engineering workflows. Graphical User Interface (GUI)

The is a cornerstone tool for engineers and scientists working in chemical engineering, refrigeration, power generation, and aerospace. REFPROP 9 represents a significant milestone in this software’s development, providing highly accurate thermophysical properties for a wide range of fluids and their mixtures.

For the most critical pure fluids, REFPROP 9 utilizes wide-range equations of state explicit in Helmholtz energy. These equations are empirical formulations based on thousands of high-precision experimental data points. They map out fluid behavior from the triple point up to temperatures of several thousand Kelvin and pressures reaching into the gigapascals. Mixing Rules and Interaction Parameters