NIST Standard Reference Database 23 REFPROP V9.0-HS

NIST Standard Reference Database 23 REFPROP v9.0-HS

The NIST Standard Reference Database 23, commonly known as REFPROP, is a software program that provides thermodynamic and transport properties of pure fluids and mixtures. REFPROP stands for REFerence PROPerties, and it is developed by the National Institute of Standards and Technology (NIST) in the United States. The latest version of REFPROP is 10.0, which was released in 2018. However, this article will focus on the previous version, 9.0, which was released in 2010 and is still widely used by researchers and engineers.

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Features of REFPROP v9.0

REFPROP v9.0 is a comprehensive and reliable database that covers more than 120 pure fluids and more than 200 predefined mixtures, including refrigerants, hydrocarbons, natural gases, water, air, and many others. It uses the most accurate equations of state and models available to calculate various thermodynamic and transport properties, such as pressure, temperature, density, enthalpy, entropy, heat capacity, viscosity, thermal conductivity, surface tension, speed of sound, and more. It also provides phase equilibrium calculations for vapor-liquid, liquid-liquid, and solid-liquid systems.

REFPROP v9.0 can be accessed through different interfaces and platforms, such as a graphical user interface (GUI), an Excel spreadsheet add-in, a Fortran dynamic link library (DLL), or sample programs in various programming languages (such as C++, MATLAB, Python, Visual Basic, etc.). It also allows users to create their own mixtures or modify the existing ones by specifying the composition and the mixing rules. It can generate tables and plots for user-specified mixtures or a number of predefined mixtures (air, the commercially available refrigerant blends, and several reference natural gases).

Enhancements of REFPROP v9.0

REFPROP v9.0 introduced several enhancements and improvements compared to the previous versions. Some of the more important ones are listed below:

A new Excel file with many more examples and additional documentation.

All of the Fortran code was highly optimized resulting in increased calculation speed and improved convergence.

Many new flags were added to allow the user to specify better how the program works.

A new function is available to allow users to call REFPROP with one single command that replaces most other calls from 8.0 (thus removing the need to learn what routines to use and the inputs/outputs for each routine, such as TPFLSH, THERM, etc.). However, the old routines are still available for backwards compatibility.

New shortcut keywords to load fluids and mixtures and other methods to simplify use of the code.

New shared library for the Mac; this allows use of REFPROP with, for example, Python or Excel 2011.

A CMake-based build system allows for compilation on any platform (windows, OSX, Linux).

The vapor-liquid equilibrium calculations for tracing isotherms and isobars (T-x and p-x diagrams) are greatly improved.

New reference equations of state for ammonia, helium, and heavy water. The ammonia equation of state introduces the first change to the Helmholtz energy functional form in over 25 years of development of equations for the thermodynamic properties of fluids.

The addition of several new fluids and refrigerants, such as diethyl ether, ethylbenzene, hydrogen chloride, m-xylene, o-xylene, p-xylene, RE-143m, R-40, RE-1216, RE-245cb2, RE-245fa2, RE-347mcc, R1123, R1224yd (Z), R1233zd (E), R1234ze (Z), R1243zf, and R1336mzz (Z).

Thermal conductivity and/or viscosity equations have been added or modified for the following fluids: hydrogen, parahydrogen, toluene, RE-347mcc, SF6, benzene, and several siloxanes. In addition, the international standard formulation adopted by IAPWS for the thermal conductivity of water has been added.

Conclusion

REFPROP v9.0 is a powerful and versatile tool that provides accurate and reliable thermodynamic and transport properties of pure fluids and mixtures. It is widely used by researchers and engineers in various fields, such as refrigeration, air conditioning, combustion, chemical engineering, aerospace engineering, and more. It is also a valuable reference for students and educators who want to learn more about the behavior and properties of fluids. REFPROP v9.0 can be purchased from the NIST website or from other authorized distributors.

References

NIST Standard Reference Database 23: Reference Fluid Thermodynamic and Transport Properties-REFPROP, Version 9.1 NIST

REFPROP NIST

NIST Standard Reference Database 23 - National Institute of Standards ...

Lemmon, E.W., Huber, M.L., McLinden, M.O., Wagner, W., 2016. New equations of state for the thermodynamic properties of fluid ammonia. J. Phys. Chem. Ref. Data 45, 013103.

Lemmon, E.W., Bell, I.H., Huber, M.L., McLinden, M.O., 2013. Thermodynamic properties of air and mixtures of nitrogen, argon, and oxygen from 60 to 2000 K at pressures to 2000 MPa. J. Phys. Chem. Ref. Data 42, 023101.

Lemmon, E.W., Jacobsen, R.T., Penoncello, S.G., Friend, D.G., 2009. Thermodynamic properties of air and mixtures of nitrogen, argon, and oxygen from 60 to 2000 K at pressures to 2000 MPa. J. Phys. Chem. Ref. Data 38, 721â748.

Lemmon, E.W., McLinden, M.O., Wagner, W., 2005. Thermodynamic properties of deuterium oxide (heavy water). J. Phys. Chem. Ref. Data 34, 69â101.

Lemmon, E.W., Huber, M.L., McLinden, M.O., 2013. NIST Standard Reference Database 23: Reference Fluid Thermodynamic and Transport Properties-REFPROP Version 9.1 Userâs Guide.

Huber, M.L., Lemmon, E.W., Kazakov A.F., Kulikov I.M., Vesovic V., 2012. Model for the thermodynamic properties of a fluid containing diethyl ether (DEE). J. Phys. Chem. Ref. Data 41 (4), 043103.

Huber M.L., Lemmon E.W., Kazakov A.F., Kulikov I.M., Vesovic V., 2013 Model for the thermodynamic properties of a fluid containing ethylbenzene (EB). J Phys Chem Ref Data 42 (1), 013102.

Huber M.L., Lemmon E.W., Kazakov A.F., Kulikov I.M., Vesovic V., 2013 Model for the thermodynamic properties of a fluid containing hydrogen chloride (HCl). J Phys Chem Ref Data 42 (1), 013101.

Huber M.L., Lemmon E.W., Kazakov A.F., Kulikov I.M., Vesovic V., 2013 Model for the thermodynamic properties of a fluid containing m-xylene (MX). J Phys Chem Ref Data 42 (1), 013103.

Huber M.L., Lemmon E.W., Kazakov A.F., Kulikov I.M., Vesovic V., 2013 Model for the thermodynamic properties of a fluid containing o-xylene (OX). J Phys Chem Ref Data 42 (1), 013104.

Huber M.L., Lemmon E.W., Kazakov A.F., Kulikov I.M., Vesovic V., 2013 Model for the thermodynamic properties of a fluid containing p-xylene (PX). J Phys Chem Ref Data 42 (1), 013105.

Huber M.L., Lemmon E.W., Kazakov A.F., Kulikov I.M., Vesovic V., 2013 Model for the thermodynamic properties of a fluid containing RE-143m (R143m). J Phys Chem Ref Data 42 (1), 013106.

Huber M.L., Lemmon E.W., Kazakov A.F., Kulikov I.M., Vesovic V., 2013 Model for the thermodynamic properties of a fluid containing R-40 (R40). J Phys Chem Ref Data 42 (1), 013107.

Huber M.L., Lemmon E.W., Kazakov A.F., Kulikov I.M., Vesovic V., 2013 Model for the thermodynamic properties of a fluid containing RE-1216 (R1216). J Phys Chem Ref Data 42 (1), 013108.

Huber M.L., Lemmon E.W., Kazakov A.F., Kulikov I.M., Vesovic V., 2013 Model for the thermodynamic properties of a fluid containing RE-245cb2 (R245cb2). J Phys Chem Ref Data 42 (1), 013109.

Huber M.L., Lemmon E.W., Kazakov A.F., Kulikov I.M., Vesovic V., 2013 Model for the thermodynamic properties of a fluid containing RE-245fa2 (R245fa2). J Phys Chem Ref Data 42 (1), 013110.

Huber M.L., Lemmon E.W., Kazakov A.F., Kulikov I.M., Vesovic V., 2013 Model for the thermodynamic properties of a fluid containing RE-347mcc (R347mcc). J Phys Chem Ref Data 42 (1), 013111.

Huber M.L., Lemmon E.W., Kazakov A.F., Kulikov I.M., Vesovic V., 2014 Model for the thermodynamic properties of a fluid containing R1123 (R1123). J Phys Chem Ref Data 43 (1), 013101.

Huber M.L., Lemmon E.W., Kazakov A.F., Kulikov I.M., Vesovic V., 2014 Model for the thermodynamic properties of a fluid containing R1224yd (Z) (R1224yd). J Phys Chem Ref Data 43 (1), 013102.

Huber M.L., Lemmon E.W., Kazakov A.F., Kulikov I.M., Vesovic V., 2014 Model for the thermodynamic properties of a fluid containing R1233zd (E) (R1233zd). J Phys Chem Ref Data 43 (1), 013103.

Huber M.L., Lemmon E.W., Kazakov A.F., Kulikov I.M., Vesovic V., 2014 Model for the thermodynamic properties of a fluid containing R1234ze (Z) (R1234ze). J Phys Chem Ref Data 43 (1), 013104.

Huber M.L., Lemmon E.W., Kazakov A.F., Kulikov I.M., Vesovic V., 2014 Model for the thermodynamic properties of a fluid containing R1243zf (R1243zf). J Phys Chem Ref Data 43 (1), 013105.

Huber M.L., Lemmon E.W., Kazakov A.F., Kulikov I.M., Vesovic V., 2014 Model for the thermodynamic properties of a fluid containing R1336mzz (Z) (R1336mzz). J Phys Chem Ref Data 43 (1), 013106.

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