Refprop 91 Install ((free))

If you need to perform a clean because the first attempt failed:

The REFPROP installer includes an Excel Add-In file ( REFPROP.xlam or REFPROP.xla ) to enable thermodynamic functions directly within spreadsheets. Open Microsoft Excel. Go to > Options > Add-ins .

Then log out and log in as Administrator to run the installer.

Right-click the file and select to ensure the installer has permission to write to the system folders. Step 2: Follow the Installation Wizard Welcome Screen: Click "Next". License Agreement: Read and accept the license agreement. refprop 91 install

Ensure all components (Fluid files, Mixture files, and Help files) are checked. Click and wait for the progress bar to finish. Click Finish to close the setup wizard. 3. Configuring Environment Variables (Critical Step)

Click and locate the REFPRP91.XLA file in your REFPROP folder. Ensure "Refprp91" is checked in the list. Special Cases: macOS and Version Conflicts

If you plan on using REFPROP frequently with Python, MATLAB, or Excel, some users prefer installing it to a shorter path like C:\REFPROP to avoid issues with spaces in file paths during API calls. Step 4: Complete the Installation If you need to perform a clean because

If you get an error saying a fluid file (like NITROGEN.FLD ) is missing, ensure you are running the application from the directory where the /fluids/ folder is located.

Open Microsoft Excel (2007, 2010, 2013, 2016, or 2019). Go to File > Options > Add-ins . Look for “NIST REFPROP Add-in” under Active Application Add-ins. If not listed, manually load it via Browse and navigate to:

REFPROP is a widely used program developed by the National Institute of Standards and Technology (NIST) to calculate the thermophysical properties of pure fluids and mixtures. 🛠️ Step-by-Step Installation Guide Step 1: Obtain the Software Then log out and log in as Administrator

A valid provided by NIST or your institution. Roughly 200 MB of free disk space. 2. Step-by-Step Installation on Windows

EES has a built-in REFPROP call. After installation, simply write:

For engineers and researchers, running property calculations in Excel is far more efficient than using the standalone REFPROP interface. The installer’s ability to saves hours of troubleshooting path variables or compatibility issues (especially on 32-bit vs 64-bit Office).

. You can change this during setup, but do not manually rename any internal files or subdirectories after installation. Linking with Other Applications Excel Add-in : To use REFPROP in Excel, navigate to File > Options > Add-ins for Excel Add-ins, then C:\Program Files\REFPROP folder to select REFPROP.xlam Environment Variables