Refprop 91 Install Link

Press the , type Environment Variables , and select Edit the system environment variables .

Because REFPROP is a Windows-based Fortran program, macOS users must use a wrapper. Directory Setup : Create a folder named /Users/$USER/Library/Group Containers/UBF8T346G9.Office/ Copy Files : Copy your folders (must be capitalized) and the librefprop.dylib file into this new folder. Excel Setup REFPRP91.XLA

Installing is a straightforward process, but it requires careful adherence to steps to ensure all DLL files, fluids, and mixtures function correctly within your thermodynamic modeling environments (e.g., Excel, MATLAB, Python).

After the file copy completes, the installer will prompt: “Please locate your REFPROP.LIC file.” refprop 91 install

While Version 10 is the current standard, remains in use for legacy compatibility and specific research workflows. The following comprehensive guide details the installation, system configuration, and common troubleshooting steps for setting up REFPROP 9.1. 1. Core Installation and System Requirements

Follow these steps to install the core database and user interface on a Windows machine. Step 1: Run the Installer

: Locate your installation file (typically named nist2391.exe for version 9.1) or insert the REFPROP CD-ROM. Press the , type Environment Variables , and

Before beginning, ensure your system meets these basic needs:

By completing these steps, you create a clean slate, which is the best way to prevent "ghosts" of old software from causing problems.

: Note that version 9.1 is an older release. Official support and the latest fluid models are found in Version 10.0 , which is available through the NIST Standard Reference Database . Excel Setup REFPRP91

: Windows XP, 7, 8, 10, or 11 (32-bit or 64-bit). Storage : At least 10–20 MB of available hard disk space. 2. Standard Installation Steps

REFPROP 9.1 is a widely used software for calculating the thermodynamic and transport properties of industrial fluids, refrigerants, and hydrocarbons. Its accuracy is crucial for engineers, researchers, and developers in HVAC, chemical processing, and aerospace fields.

Ensure you are using the version of the DLL that matches your calling application. REFPROP 9.1 includes both; the 64-bit version is often named REFPRP64.DLL 3. Integration with Excel To use REFPROP functions directly in spreadsheets: Open Excel and go to Options > Add-ins Excel Add-ins Browse to your REFPROP directory and select REFPROP.xlam Refprop.xla for older versions). Once enabled, you can use formulas like =Theoretical("T","Density", "SI", "Water") directly in cells. 4. Verification After installation, always run the standalone REFPROP GUI

REFPROP 9.1 is a powerful tool for calculating thermodynamic properties of fluids. By following this installation guide, you can successfully install and configure REFPROP 9.1 on your system. With its comprehensive database and user-friendly interface, REFPROP 9.1 is an essential resource for engineers, researchers, and scientists working with fluid thermodynamics. If you have any questions or need further assistance, do not hesitate to contact the NIST REFPROP support team.

: Set this variable to point to your main installation directory (e.g., C:\Program Files\REFPROP