A free, open-source chemical process simulator. It includes its own property packages and can integrate with CoolProp to provide RefProp-like functionality within a full plant simulation environment. A Note on "Free" Downloads
Corrupted property libraries that can lead to dangerous engineering miscalculations.
If you cannot afford a RefProp license, there are powerful, open-source alternatives that offer similar accuracy for common fluids. ⚙️ CoolProp (Recommended) CoolProp is the best free alternative to RefProp. Completely free for all users. refprop 91 free
It provides the most accurate equations of state available.
Fees fund the continued updates of fluid property libraries. How to Get RefProp (The Right Way) A free, open-source chemical process simulator
Focuses on chemical kinetics and thermodynamics. It is widely used in combustion research and is a robust tool for those who need fluid properties within a programming environment. 📉 DWSIM
Many universities and large engineering firms hold site licenses. If you are a student or employee, check your organization's software portal. You may already have access to a legal download. 2. NIST Standard Reference Database If you cannot afford a RefProp license, there
It only includes a few fluids (like water, nitrogen, and R134a).
RefProp 9.1 is a legacy version of the software. While NIST has since released version 10.0, many engineers and researchers still look for 9.1 due to its compatibility with older plugins, Excel macros, or specific research citations. Why RefProp Isn't Free