: NIST provides mini-REFPROP , a free sample version of the full program. It is intended as a teaching tool and includes a limited set of fluids like water, CO2cap C cap O sub 2 , and R134a.
CoolProp is the most powerful open-source alternative: Refprop 9.0 Download Free--------
Includes 147+ fluids, including natural gas components, cryogens, and refrigerants. Interfaces: : NIST provides mini-REFPROP , a free sample
REFPROP | NIST - National Institute of Standards and Technology : NIST provides mini-REFPROP
Q: How do I cite Refprop 9.0 in my publications? A: You should cite Refprop 9.0 as "NIST Reference Fluid Thermodynamic Transport Properties, Version 9.0".