It is essential for industries involving refrigeration, aerospace, chemical processing, and power generation, supporting fluids like ammonia, water/steam, toluene, and various refrigerants. What Does "Portable" Mean for REFPROP 9.0?

Never separate refprop.dll from the FLUIDS and MIXTURES folders, as the DLL relies on hardcoded subfolder names to locate fluid property definitions.

(viscosity, thermal conductivity) for most fluids.

Here's a deep report on the topic:

While NIST officially provides an installer, a portable setup is generally achieved by setting up the software on one machine and then moving the installation folder.

NIST REFPROP (REference Fluid PROPerties) 9.0 is a specialized software package developed by the to calculate the thermodynamic and transport properties of industrially important fluids and their mixtures.

REFPROP's licensing mechanism may tie the software to a specific machine ID or installation. If the portable version attempts to run on a different computer, it might request reactivation or fail to operate. This is the most significant barrier to legitimate portable use, as bypassing licensing mechanisms would constitute software piracy.