RefProp is a popular thermodynamic property software developed by the National Institute of Standards and Technology (NIST). It's used to calculate the thermodynamic and transport properties of fluids, including refrigerants, hydrocarbons, and other substances. The software is widely used in various fields, such as engineering, research, and education.
You're looking for information on RefProp 10 and how to download it for free. Here's what I found: refprop 10 free download
If you're interested in using RefProp 10 for commercial or professional purposes, I recommend purchasing a license from NIST or a authorized distributor to ensure you have access to the full features and support. such as engineering