Installing NIST REFPROP 9.1: A Complete Step-by-Step Guide NIST REFPROP (Reference Fluid Thermodynamic and Transport Properties) is the industry standard for calculating the thermophysical properties of fluids and hydrocarbon mixtures. While newer versions exist, REFPROP 9.1 remains widely used in engineering, academic research, and legacy industrial simulation pipelines.
A: Yes, it supports binary and pseudo-binary mixtures. Use the “Mixture” menu in the GUI or the REFPROPm DLL.
If you need , you are likely either an academic revisiting legacy coursework, a researcher replicating published results, or an industry veteran maintaining older simulation platforms. refprop 91 install
Click and wait 1–3 minutes as files copy. At the end, uncheck “View Readme.txt” unless you enjoy highly technical legacy notes. Click Finish .
Solution: This happens when the software calling the DLL cannot find the .FLD files. Ensure your RPPREFIX environment variable is accurately set to the directory containing the FLUIDS folder. Installing NIST REFPROP 9
from CoolProp.CoolProp import FluidsList import CoolProp CoolProp.set_config_string(CoolProp.ALTERNATIVE_REFPROP_PATH, 'C:\\REFPROP\\') Use code with caution. MATLAB Integration
: To access REFPROP from other applications, you may need to set specific environment variables: Use the “Mixture” menu in the GUI or the REFPROPm DLL
Article last updated: 2025 – for informational purposes. NIST REFPROP is a registered trademark of the National Institute of Standards and Technology.
Most Python users utilize the provided by CoolProp to access REFPROP 9.1: pip install CoreProp Use code with caution.
Later that evening, I ran a transient condensation model. The solver chewed through REFPROP lookups, interpolations, and behind-the-scenes fits, and spat out a temperature profile that matched the empirical curve I still had pinned under a magnet. I felt like a conductor whose orchestra was finally in tune. REFPROP wasn't just installed; it had become the thread joining data, model, and experiment.
Click and paste your installation path (e.g., C:\Program Files (x86)\REFPROP ). Click OK on all windows. 4. Integrating with Third-Party Software Excel Integration Open Excel and go to File > Options > Add-ins . At the bottom, select Excel Add-ins and click Go . Click Browse and navigate to your REFPROP folder. Select REFPROP.xla (for older Excel) or REFPROP.xlam .