Author(s)

NIST computer program REFPROP. The model is a modification of a one-fluid, extended corresponding states (ECS) model for thermal conductivity and viscosity originally developed by Ely and Hanley (Ind. Fundam., 1981, 20:323-332). We apply the model to. Single-compound fluids can be combined to form blends of up to ten components. Computationally, the program is fully compatible with the NIST Reference Fluid Thermodynamic and Transport Properties - REFPROP, Version 10.0. The Refprop.xls file that comes with the program has Visual Basic (VB) code embedded within it to make the connection between the workbook and the Refprop DLL. However, when working with anything other than temporary calculations, it is best to start with a blank workbook that does not have the VB code.

Abstract

This is a new release of the NIST Standard Reference Database 23, commonly known as REFPROP. Enhancements have been made to most areas of the NIST REFPROP program, including the graphical interface, the Excel spreadsheet, the FORTRAN files (i.e., core property routines), the sample programs in C++, MatLab, VB, etc., and additional fluids. Convergence along the saturation lines is now better for complex mixtures due to new algorithms for finding phase boundaries, the addition of analytical derivatives in the calculation of the fugacity, and spline curves to provide initial inputs to the phase boundary routines. The FORTRAN code was organized to be threadsafe and allow multi-core processing, and a 64-bit version of the DLL is available for use with Excel or Matlab. Several new fluids have been added inlcuding: diethyl ether, ethylbenzene, hydrogen chloride, m-xylene, o-xylene, p-xylene, RE-143m, R-40, RE-1216, RE-245cb2, RE-245fa2, and RE-347mcc. Equations of state have been revised for ammonia, dimethyl carbonate, ethanol, and helium, and a new mixture model for ammonia/water was developed. 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.

Transport Properties Program – REFPROP, Version 8.0 1. NIST CYCLED Program Group will be created at the the end of installation. To run the program, double- click on the NIST CYCLED icon. CYCLED 2 MODELING APPROACH. The basic subcritical or transcritical system simulated by CYCLED. Install REFPROP as normal. (default installation directory on 64-bit windows is c:/Program Files (x86)/REFPROP, or c:/Program Files/REFPROP on 32-bit windows) If you have a 64-bit MATLAB version, make sure you have a REFPRP64.dll file in your REFPROP installation directory.

Natl Std. Ref. Data Series (NIST NSRDS) -

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Keywords

Reference Fluid, REFPROP, equations of state, refrigerants

Refprop 10

Citation

Nist Refprop Program