If you are looking for information on upgrading to the latest version, I can help you find information regarding the key updates in REFPROP 10.
Standardized mixtures like air, ammonia-water, and various commercial R-numbered refrigerant blends are pre-programmed.
Improved mixing rules for better accuracy with mixtures (essential for supercritical CO₂ and natural gas applications). Core Capabilities and Features
REFPROP 9 models natural gas mixtures, liquefied natural gas (LNG) composition, and hydrocarbon separation processes. It provides the precise phase behavior data needed to prevent hydrate formation and optimize pipelines. Thermodynamic Models and Accuracy nist refprop 9
Pressure, Density, Temperature, Enthalpy (h), Entropy (s), Internal Energy (u), Heat Capacity ( Cpcap C sub p Cvcap C sub v ), Speed of Sound (w). Transport: Viscosity, Thermal Conductivity.
The database covers a vast library of pure substances across several categories:
Here is a comprehensive breakdown of what NIST REFPROP 9 is, its core capabilities, its mathematical foundation, and how it continues to be utilized in modern engineering. What is NIST REFPROP 9? If you are looking for information on upgrading
Vapor-liquid equilibrium (VLE) for pure fluids and mixtures. Thermodynamic Modeling Approach REFPROP ensures thermodynamic consistency by using an Equation of State (EOS)
Used in the development of space telescope coolers (such as the MIRI cooler) involving helium (⁴He/³He) at temperatures near 6 K.
(REference Fluid PROPerties) is a standard reference database developed to provide the most accurate thermophysical properties for industrially important fluids and their mixtures. It is widely used in refrigeration, aerospace, and natural gas industries to optimize equipment and chemical processes. National Institute of Standards and Technology (.gov) Core Capabilities and Scope REFPROP 9.0 and its sub-version 9.1 cover over 120 pure fluids and more than 200 predefined mixtures National Institute of Standards and Technology (.gov) Fluid Types: Core Capabilities and Features REFPROP 9 models natural
REFPROP 9 is built to calculate a vast array of properties across wide ranges of temperature and pressure. Fluid Coverage
| Problem | Solution | |---------|----------| | "Fluid not found" | Check fluid name spelling (e.g., R134a not 134a ). Use Fluids → List . | | Mixture phase error | Ensure T,P are within envelope; use Calculate → Phase boundary first. | | DLL not loading in Python | Run 32-bit Python, set working directory to REFPROP folder. | | Plot window blank | Save data to .txt first, then plot in Excel/origin. | | License error | Reinstall refprop.lic ; ensure path has no spaces. |
(REference Fluid PROPerties) is a standard reference database developed by the National Institute of Standards and Technology (NIST) to calculate the thermophysical properties of industrially important fluids and their mixtures. Released in 2010 (v9.0) and updated in 2013 (v9.1), it is a critical tool for researchers and engineers in refrigeration, natural gas, and chemical processing. Core Capabilities