Press the , type Environment Variables , and select Edit the system environment variables .
Ensure the .dll files are present in the C:\Program Files\REFPROP folder and that the location is added to your system's PATH variable, if necessary. refprop 91 install
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 Press the , type Environment Variables , and
Before you start, ensure your system meets these modest requirements: REFPROP 9
Windows 7, 8, 10, or 11 (32-bit or 64-bit architectures). Disk Space: Approximately 300 MB of free hard drive space.