Refprop 91 Install Updated -

: Required to write to the C:\Program Files (x86) directory and edit system environment variables.

Comprehensive Guide to Installing NIST REFPROP 9.1 NIST Reference Fluid Thermodynamic and Transport Properties Database () is the gold standard for engineers and scientists needing accurate thermophysical properties of fluids, including liquid, gas, and supercritical phases. REFPROP 9.1 is a widely used version known for its robustness, particularly when integrating with Excel, MATLAB, or other simulation tools.

from CoolProp.CoolProp import FluidsList import CoolProp CoolProp.set_config_string(CoolProp.ALTERNATIVE_REFPROP_PATH, 'C:\\REFPROP\\') Use code with caution. MATLAB Integration

The application opened the DLL successfully, but the DLL looks for the fluid database ( .FLD files) in its local directory and fails. refprop 91 install

By default, the software installs to: C:\Program Files (x86)\REFPROP

first. If you can calculate a simple saturation table for a common fluid like Nitrogen, the underlying fluid files (.FLD) and mixture files (.MIX) are correctly placed. Are you planning to use REFPROP primarily through the Excel Add-in or via a programming language like

Before initiating the installation, ensure your system meets the necessary software and hardware criteria. Operating System Compatibility Windows 7, 8, 10, and 11 (32-bit and 64-bit architectures). Linux environments (via shared object library compilation). : Required to write to the C:\Program Files

During installation, the installer usually asks if you want to install the Excel add-in. Ensure the Excel Add-in option is checked.

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.

Many third-party programs cannot find REFPROP because its folder isn't registered in the Windows system path. Adding it manually prevents most connection errors. from CoolProp

Even following the steps perfectly, you may encounter errors. Here are the most frequent issues with and their solutions.

Right-click the installer executable and select . Click Next on the welcome screen. Step 2: Accept the License Agreement Read the NIST end-user license agreement. Select I accept the agreement and click Next . Step 3: Choose Destination Location

The installation typically begins with the executable provided by NIST. Run the installer to unpack the high-accuracy property models and the graphical user interface. By default, the program installs to C:\Program Files (x86)\REFPROP

. It is highly recommended to keep this path, as many third-party wrappers look for it there by default. Verification : After installation, open the REFPROP.EXE