Routines are provided to calculate thermodynamic and transport properties at a given (T,rho,x) state. They are written in a structured format,Īre internally documented with extensive comments, and have been tested on a variety of compilers. These models are implemented in a suite of FORTRAN subroutines. Thermal conductivity are modeled with either fluid-specific correlations, an ECS method, or in some cases the Mixture calculations employ a model that applies mixing rules to the Helmholtz energy of the mixtureĬomponents it uses a departure function to account for the departure from ideal mixing. The modified Benedict-Webb-Rubin equation of state, and an extended corresponding states (ECS) model. Three models for the thermodynamic properties of pure fluids: equations of state explicit in Helmholtz energy, REFPROP is based on the most accurate pure fluid and mixture models currently available. Hydrocarbons, especially natural gas systems. Properties of industrially important fluids and their mixtures with an emphasis on refrigerants and Of Standards and Technology (NIST), provides tables and plots of the thermodynamic and transport This program, developed by the National Institute REFPROP is an acronym for REFerence fluid PROPerties. The following paragraphs were reproduced from the User's Guide for REFPROP NIST Standard Reference Database 23
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