Refprop 91 Free [top] -
If you are looking for free, high-accuracy thermodynamic fluid properties, the following open-source tools are widely recommended by the engineering community: REFPROP | NIST
These files often contain malware or trojans designed to infect workstations.
It can be found by searching for "mini refprop" on the NIST website or through university resources. 2. Pricing and Licensing for Full Versions
Below is a blog post drafted for you to share this information or explore the tool's features.
is a proprietary software developed by the National Institute of Standards and Technology (NIST) and is not officially available for free . It is a high-accuracy computational tool used to calculate the thermophysical properties of industrially important fluids and their mixtures. 1. Official Free Version (REFPROP Mini) refprop 91 free
REFPROP, developed by the National Institute of Standards and Technology (NIST), is a comprehensive software package that provides detailed property data for refrigerants, including thermodynamic properties, transport properties, and phase equilibrium data. It's essential for engineers and researchers working with fluid dynamics, HVAC (heating, ventilation, and air conditioning), refrigeration, and chemical engineering.
“It begins with a search for free software and ends with a corrupted hard drive — or a polite reminder that NIST’s work supports global refrigeration standards, and pirating it only hurts the science.”
: NIST does not provide technical updates or troubleshooting to unlicensed users. Legal Ways to Access REFPROP Capabilities for Free
Given these features, REFPROP has become an indispensable tool for researchers, engineers, and students. However, this precision and authority come at a cost. If you are looking for free, high-accuracy thermodynamic
: It includes properties for a restricted set of substances, typically water, CO2cap C cap O sub 2 R134acap R 134 a , nitrogen, methane, propane, hydrogen, and dodecane.
The full version of REFPROP is commercial software. While NIST does not publicly list prices, the software is well-known to be expensive, with licenses costing hundreds or even thousands of dollars per user. A site license allows multiple named users within an organization, but each individual requires their own license. Commercial packages or public-facing applications that integrate REFPROP require separate agreements with NIST. For educational institutions, NIST offers a special site license with reduced fees for academic use. It is also legal for a university or company to purchase a license and then make it available to their students or employees.
The latest version of REFPROP, version 91, was a significant upgrade from its predecessors. It included new features, improved accuracy, and a more user-friendly interface. However, the software came with a hefty price tag, making it inaccessible to many individuals and organizations.
: This is a free sample version of the full program. Pricing and Licensing for Full Versions Below is
NIST offers a completely free, stripped-down edition called (often packaged as Version 10, which supersedes the 9.1 codebase). It is intended as an educational teaching tool.
Searching for "Refprop 91 free" often leads to websites, downloads, or forums offering illegal or cracked versions. The most likely outcome of visiting such websites is significant cybersecurity risks, including viruses, trojans, ransomware, and keyloggers disguised as setup files, rather than a fully functional program.
: It includes a graphical user interface (GUI), FORTRAN subroutines, and can be linked to , MATLAB, and Python. Is There a Free Version?
However, I can offer a about REFPROP 9.1, its capabilities, and how to access it legally — including free/low-cost options if they exist.