Refprop 91 Install !!exclusive!! →

You must run the installer as an administrator to write to the Windows Registry and the C:\Program Files (x86) directory.

If you plan on using REFPROP with third-party wrappers (like Python’s

While still widely used, REFPROP 9.1 has been superseded by later versions (10.0 and beyond). Users should ensure they are using the correct version for their needs and be aware that updates may contain critical improvements and bug fixes.

You must have the original installation files (usually an .exe installer or a folder containing SETUP.EXE ). 2. Step-by-Step Installation Process Step 1: Run the Installer refprop 91 install

The single most important step is ensuring any previous REFPROP installation is removed. An incomplete uninstallation is the most common cause of upgrade and installation failures.

: If you plan to link REFPROP with Python, MATLAB, or Excel, consider changing this path to a folder without spaces or strict permission locks, such as C:\REFPROP . This prevents path-parsing errors in external scripts. Click Next . Step 4: Select Components and Finish

This comprehensive guide covers the complete installation process for REFPROP 9.1, including standalone setup, environment configuration, and integration with third-party software like MATLAB, Excel, and Python. System Requirements and Prerequisites You must run the installer as an administrator

If you plan to link REFPROP with Python, MATLAB, or Mini-Refprop, consider changing this destination path to a simpler directory without spaces, such as: C:\REFPROP Click Next after confirming your path. Step 3: Select Components and Complete Installation

How to Install REFPROP 9.1: A Complete Step-by-Step Guide NIST Reference Fluid Thermodynamic and Transport Properties Database (REFPROP) is the industry standard for predicting the thermophysical properties of fluid mixtures. Version 9.1 remains widely used in engineering, chemistry, and mechanical applications due to its stability and deep integration with legacy simulation tools.

Before beginning, ensure your system meets these basic needs: You must have the original installation files (usually an

Note: This is complex. Many users prefer to use , which wraps REFPROP, but CoolProp may require REFPROP 10.0+.

Go to File > Options > Trust Center > Trust Center Settings > Trusted Locations . Add your REFPROP folder (e.g., C:\Program Files\REFPROP ) and check "Subfolders of this location are also trusted".

This usually means the system cannot find REFPROP.DLL . Ensure the installation folder is correctly added to your Windows System Path (see Section 3).

To link REFPROP 9.1 with MATLAB, you generally need the refpropm.m wrapper provided by NIST or open-source repositories. Download the refpropm.m file.