Wrappers are available for Python, MATLAB, Excel, C++, and C#.
A common misconception is that older versions of proprietary software become "freeware." protected by copyright.
: You can safely install it via the NIST TRC mini-REFPROP portal . REFPROP - NIST
Calculates density, viscosity, thermal conductivity, enthalpy, entropy, and heat capacity for liquids, vapors, and supercritical states.
It only includes a few fluids (like water, nitrogen, and R134a).
It provides the most accurate equations of state available.
While the full software is a proprietary, paid product, several legitimate ways exist to access its capabilities for free, alongside powerful open-source alternatives. What is NIST REFPROP 9.1?
Fortunately, the thermodynamic community has recognized the need for a free, open-source alternative to REFPROP. That alternative is .
: Works with Python, MATLAB, Excel, C++, and more.
Supports over 120 pure fluids and a vast array of humid air properties. Cost: 100% free for both commercial and academic use. 2. DWSIM (Open-Source Process Simulator)
Because of its high value in chemical engineering, aerospace, and HVAC system design, cracked versions or illegal mirrors frequently circulate online. However, downloading cracked software poses severe risks:
If your goal is to analyze refrigeration cycles (which is the primary use case for REFPROP), the model from NIST often includes some functionality. 3. Academic Access
You can link free property databases directly into your development environments using open-source libraries. Python Integration with CoolProp
, nitrogen, oxygen, methane, propane, helium, and hydrogen).
Perhaps the most popular feature, allowing you to pull density or enthalpy directly into your calculations. How to Get Started REFPROP | NIST