Released as a stable, mature version, REFPROP 9 represents the culmination of years of experimental data correlation. It supports over 147 pure fluids (depending on the specific sub-version) and allows users to calculate properties for mixtures containing up to 20 components.
To define a mixture, create a file with the .MIX extension specifying the mole fractions. For example: [Methane, 0.85; Ethane, 0.10; Propane, 0.05] . Then call REFPROP on that mixture name.
Understanding NIST REFPROP 9: A Benchmark for Thermophysical Properties nist refprop 9
Natural gas is a complex mixture of hydrocarbons and impurities like nitrogen and carbon dioxide. REFPROP 9 helps process engineers design distillation columns, pipelines, and liquefaction facilities (LNG) by accurately predicting phase behavior and vapor-liquid equilibria. Software Integration and User Interface
REFPROP 9 is packaged as both a standalone graphical user interface (GUI) for Windows and a dynamic link library (DLL) for external software integration. The Graphical User Interface (GUI) Released as a stable, mature version, REFPROP 9
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: REFPROP 9.x has been superseded by version 10.0 , which includes further accuracy improvements, a streamlined one-command calling system, and many performance optimizations. For example: [Methane, 0
Link directly to the source routines for high-performance computing applications. Legacy Value of Version 9
Generate custom thermodynamic surfaces for visual analysis.
The heating, ventilation, air conditioning, and refrigeration (HVAC&R) industry relies heavily on REFPROP. Engineers use it to model refrigeration cycles, evaluate the efficiency of new low-global-warming-potential (GWP) alternative refrigerants, and size heat exchangers. 2. Power Generation and Organic Rankine Cycles (ORC)
Engineers designing compressors, expansion valves, and heat exchangers use REFPROP 9 to model the exact refrigerant behavior. For example, calculating the isentropic efficiency of a compressor requires precise entropy values at the inlet and outlet. Using REFPROP 9 reduces design margin risks from 10% (using ideal gas tables) to under 1%.