Refprop 91 __exclusive__ Free Jun 2026

REFPROP 9.1 remains a vital tool in the engineer's toolkit. While it is not free software, its accuracy and reliability make it worth the investment for professionals. If you are a student, check your university resources; if you are a professional, ensure you are purchasing a legitimate license from NIST to guarantee the safety and accuracy of your calculations.

| Software | Pros | Limitations | |----------|------|--------------| | | Open-source, high-accuracy, many fluids, Python/MATLAB/C++/Excel | No official GUI (but third-party ones exist) | | NIST Refprop Online | Free, web-based | Single-phase pure fluids only, no mixtures | | ThermoState (Python) | Simple interface, free | Limited fluids vs. REFPROP | | REFPROP Lite (if released) | Not available | — | refprop 91 free

If you only need data for a single fluid at specific points (like the boiling point of R134a at a certain pressure), you can use the . It is free to use online. It uses the same underlying equations as REFPROP. REFPROP 9

If you are working with standard fluids (CO2, Nitrogen, Water, Ammonia) or common refrigerants, 9.1 is still a highly reliable tool. However, if you are working with cutting-edge alternative fuels or new refrigerants, upgrading is highly recommended. It uses the same underlying equations as REFPROP

Let’s assume you find a legitimate-looking download of REFPROP 9.1 from an archive (e.g., a former student’s Google Drive). Even if the file is clean, consider these points:

It is important to clarify a common misconception regarding this software:

CoolProp is an open-source, cross-platform thermophysical property database. It is not a "crack" – it is legitimate and peer-reviewed.