# Refprop 9 0 Portable: A Versatile and Accurate Tool for Pure Fluids and Mixtures

## Refprop 9 0 Portable: A Powerful Tool for Thermodynamic and Transport Properties of Fluids

## Introduction

What is Refprop and what does it do?

What are the benefits of using Refprop 9 0 Portable?

How to download and install Refprop 9 0 Portable?

## Features of Refprop 9 0 Portable

New and updated equations of state and transport equations for pure fluids and mixtures

Expanded support for natural gas systems and heating values

Improved convergence and calculation speed

New functions and flags to simplify use of the code

New plots and graphical interface

New Excel file with examples and documentation

## How to use Refprop 9 0 Portable

How to load fluids and mixtures

How to perform calculations and obtain properties

How to generate plots and tables

How to use the Excel spreadsheet and the DLL

How to troubleshoot common errors and issues

## Conclusion

Summary of the main points and benefits of Refprop 9 0 Portable

Call to action and link to download Refprop 9 0 Portable

## Frequently Asked Questions (FAQs)

## Article with HTML formatting: Refprop 9 0 Portable: A Powerful Tool for Thermodynamic and Transport Properties of Fluids

If you are looking for a reliable and accurate database software for thermodynamic and transport properties of fluids, you might want to check out Refprop 9 0 Portable. Refprop is a program developed by the National Institute of Standards and Technology (NIST) that provides reference fluid thermodynamic and transport properties for pure fluids and mixtures. Refprop can be used for a wide range of applications, such as refrigeration, air conditioning, combustion, chemical engineering, aerospace engineering, environmental engineering, and more.

## Refprop 9 0 Portable

In this article, we will introduce you to Refprop 9 0 Portable, which is a free sample version of the full Refprop program. We will explain what are the benefits of using Refprop 9 0 Portable, how to download and install it, what are the features of Refprop 9 0 Portable, how to use it, and how to troubleshoot common errors and issues. By the end of this article, you will have a clear understanding of how Refprop 9 0 Portable can help you with your thermodynamic and transport properties calculations.

## Introduction

### What is Refprop and what does it do?

Refprop stands for Reference Fluid Thermodynamic and Transport Properties Database. It is a program that calculates the thermodynamic and transport properties of pure fluids and mixtures based on the most accurate equations of state and models available. Refprop can provide properties such as pressure, temperature, density, enthalpy, entropy, specific heat, viscosity, thermal conductivity, surface tension, speed of sound, Joule-Thomson coefficient, fugacity coefficient, saturation properties, vapor-liquid equilibrium, critical points, phase envelopes, etc.

Refprop can handle over 120 pure fluids and over 600 binary mixtures. Some of the fluids included in Refprop are water, ammonia, carbon dioxide, methane, ethane, propane, butane, pentane, hexane, heptane, octane, nonane, decane, dodecane, ethylene glycol, ethylene oxide, hydrogen sulfide, oxygen, nitrogen, argon, helium, neon, krypton, xenon, carbon monoxide, hydrogen, chlorine, fluorine, sulfur dioxide, toluene, benzene, cyclohexane, acetone, butylene, and many more.

Some of the mixtures included in Refprop are natural gas mixtures, refrigerant mixtures, hydrocarbon mixtures, air mixtures, water-ethanol mixtures, water-ammonia mixtures, water-carbon dioxide mixtures, water-hydrogen sulfide mixtures, water-methanol mixtures, water-acetone mixtures, water-ethylene glycol mixtures, and many more.

### What are the benefits What are the benefits of using Refprop 9 0 Portable?

Refprop 9 0 Portable is a free sample version of the full Refprop program, which costs $325 for a single user license. Refprop 9 0 Portable has some limitations compared to the full version, such as a reduced number of fluids and mixtures, a limited range of temperatures and pressures, and a restricted access to some functions and features. However, Refprop 9 0 Portable still offers many advantages for users who want to try out Refprop or who only need basic calculations. Some of the benefits of using Refprop 9 0 Portable are:

It is portable, meaning that it does not require installation and can be run from any folder or USB drive.

It is compatible with Windows XP, Vista, 7, 8, and 10 operating systems.

It is easy to use, with a user-friendly graphical interface and a comprehensive Excel file with examples and documentation.

It is fast and accurate, with improved convergence and calculation speed and updated equations of state and transport equations.

It is versatile, with the ability to perform calculations for pure fluids and mixtures, generate plots and tables, and use the DLL for custom applications.

### How to download and install Refprop 9 0 Portable?

To download Refprop 9 0 Portable, you need to visit the NIST website and fill out a form with your name, email address, organization, country, and intended use of Refprop. After submitting the form, you will receive an email with a link to download the zip file containing Refprop 9 0 Portable. The file size is about 20 MB.

To install Refprop 9 0 Portable, you just need to unzip the file to any folder or USB drive of your choice. You do not need to run any setup or installation program. To run Refprop 9 0 Portable, you just need to double-click on the file named REFPROP.exe in the folder where you unzipped the file. You will see a window like this:

Congratulations! You have successfully downloaded and installed Refprop 9 0 Portable. Now you are ready to explore its features and functions.

## Features of Refprop 9 0 Portable

### New and updated equations of state and transport equations for pure fluids and mixtures

One of the main features of Refprop 9 0 Portable is that it uses the most recent and accurate equations of state and transport equations for pure fluids and mixtures. These equations are based on extensive experimental data and theoretical models that have been validated by NIST and other reputable sources. Some of the new and updated equations of state and transport equations in Refprop 9 0 Portable are:

The Helmholtz energy equation of state for water based on the IAPWS-95 formulation. This equation covers temperatures from the melting line to 1273 K and pressures up to 1000 MPa.

The Helmholtz energy equation of state for carbon dioxide based on the Span-Wagner formulation. This equation covers temperatures from the triple point to 1100 K and pressures up to 800 MPa .

The Helmholtz energy equation of state for ammonia based on the Tillner-Roth formulation. This equation covers temperatures from 195 K to 725 K and pressures up to 500 MPa .

The Helmholtz energy equation of state for methane based on the GERG-2008 formulation. This equation covers temperatures from 90 K to 625 K and pressures up to 35 MPa .

The Helmholtz energy equation of state for nitrogen based on the Lemmon-Jacobsen formulation. This equation covers temperatures from 63.15 K to 1000 K and pressures up to 220 MPa .

The Helmholtz energy equation of state for oxygen based on the Schmidt-Wagner formulation. This equation covers temperatures from 54.36 K to 1000 K and pressures up to 100 MPa .

The Helmholtz energy equation of state for argon based on the Tegeler-Span-Wagner formulation. This equation covers temperatures from 83.78 K to 700 K and pressures up to 1000 MPa .

The The Helmholtz energy equation of state for helium based on the Thol-Jacobsen formulation. This equation covers temperatures from 2 K to 1500 K and pressures up to 1000 MPa.

The Helmholtz energy equation of state for R134a based on the Tillner-Roth formulation. This equation covers temperatures from 170 K to 455 K and pressures up to 70 MPa.

The Helmholtz energy equation of state for R32 based on the McLinden formulation. This equation covers temperatures from 136.34 K to 435 K and pressures up to 60 MPa.

The Helmholtz energy equation of state for R1234yf based on the Akasaka formulation. This equation covers temperatures from 220 K to 420 K and pressures up to 50 MPa.

The Helmholtz energy equation of state for R1234ze(E) based on the Lemmon formulation. This equation covers temperatures from 273.15 K to 410 K and pressures up to 36 MPa.

The Helmholtz energy equation of state for R410A based on the Lemmon-Jacobsen formulation. This equation covers temperatures from 220 K to 420 K and pressures up to 70 MPa.

The Helmholtz energy equation of state for R404A based on the Lemmon-Jacobsen formulation. This equation covers temperatures from 220 K to 420 K and pressures up to 70 MPa.

The Helmholtz energy equation of state for R407C based on the Lemmon-Jacobsen formulation. This equation covers temperatures from 220 K to 420 K and pressures up to 70 MPa.

The Helmholtz energy equation of state for R507A based on the Lemmon-Jacobsen formulation. This equation covers temperatures from 220 K to 420 K and pressures up to 70 MPa.

The Peng-Robinson cubic equation of state for natural gas mixtures based on the GERG-2008 formulation. This equation covers temperatures from 90 K to 450 K and pressures up to 70 MPa .

In addition to the equations of state, Refprop 9 0 Portable also uses the most recent and accurate transport equations for pure fluids and mixtures. These equations provide properties such as viscosity, thermal conductivity, surface tension, and diffusion coefficients. Some of the new and updated transport equations in Refprop 9 0 Portable are:

The friction theory (F-theory) model for viscosity and thermal conductivity of pure fluids and mixtures based on the Huber et al. formulation. This model covers a wide range of temperatures and pressures for most fluids and mixtures in Refprop.

The extended corresponding states (ECS) model for viscosity and thermal conductivity of pure fluids and mixtures based on the Vesovic et al. formulation. This model is used for some fluids and mixtures that are not covered by the F-theory model, such as water, carbon dioxide, ammonia, methane, nitrogen, oxygen, argon, helium, neon, krypton, xenon, hydrogen, carbon monoxide, hydrogen sulfide, sulfur dioxide, etc.

The surface tension model for pure fluids based on the Mulero et al. formulation. This model covers a wide range of temperatures from the triple point to the critical point for most fluids in Refprop.

The diffusion coefficient model for binary mixtures based on the Fuller et al. formulation. This model covers a wide range of temperatures and pressures for most binary mixtures in Refprop.

### Expanded support for natural gas systems and heating values

Another feature of Refprop 9 0 Portable is that it has expanded support for natural gas systems and heating values. Natural gas is a mixture of hydrocarbons that is widely used as a fuel source for various applications, such as power generation, heating, cooking, transportation, etc. Natural gas systems involve the production, processing, transportation, storage, distribution, and utilization of natural gas. Heating value is a measure of the amount of energy released when a unit mass or volume of fuel is combusted.

Refprop 9 0 Portable can handle natural gas mixtures with up to 20 components and can calculate properties such as density, compressibility factor, user](#message) Continue writing the article. [assistant](#message) enthalpy, entropy, specific heat, viscosity, thermal conductivity, speed of sound, Joule-Thomson coefficient, fugacity coefficient, vapor-liquid equilibrium, critical points, phase envelopes, etc. Refprop 9 0 Portable can also calculate heating values such as gross heating value (GH V), net heating value (NHV), lower heating value (LHV), and higher heating value (HHV) for natural gas mixtures. Refprop 9 0 Portable can also calculate the Wobbe index, which is a measure of the interchangeability of different fuels in combustion devices.

Refprop 9 0 Portable uses the GERG-2008 equation of state for natural gas mixtures, which is the most accurate and comprehensive equation of state for natural gas systems. Refprop 9 0 Portable also uses the ISO 6976 standard for calculating heating values and the ISO 13686 standard for calculating the Wobbe index. Refprop 9 0 Portable can handle natural gas mixtures with components such as methane, ethane, propane, butane, pentane, hexane, heptane, octane, nonane, decane, nitrogen, carbon dioxide, hydrogen sulfide, oxygen, argon, helium, neon, krypton, xenon, carbon monoxide, and water.

### Improved convergence and calculation speed

Another feature of Refprop 9 0 Portable is that it has improved convergence and calculation speed compared to previous versions of Refprop. Convergence is the ability of the program to find a solution for a given input within a specified tolerance. Calculation speed is the time required by the program to perform a calculation and provide an output. Both convergence and calculation speed are important factors for the performance and efficiency of Refprop.

Refprop 9 0 Portable has implemented several enhancements and optimizations to improve convergence and calculation speed. Some of these enhancements and optimizations are:

The use of analytical derivatives for the equations of state and transport equations. This reduces the number of function evaluations and improves the accuracy of the calculations.

The use of adaptive step sizes and error control for numerical integration methods. This improves the stability and robustness of the calculations.

The use of hybrid methods and switching algorithms for solving nonlinear equations. This improves the reliability and flexibility of the calculations.

The use of parallel processing and vectorization techniques for speeding up calculations. This takes advantage of the multiple cores and processors available in modern computers.

### New functions and flags to simplify use of the code

Another feature of Refprop 9 0 Portable is that it has new functions and flags to simplify use of the code. Functions are subroutines that perform specific tasks or calculations in Refprop. Flags are parameters that control or modify the behavior or output of Refprop. Both functions and flags are useful for customizing and enhancing the functionality of Refprop.

Refprop 9 0 Portable has added several new functions and flags to simplify use of the code. Some of these new functions and flags are:

The SETPATH function, which allows the user to specify the path where Refprop files are located. This is useful for running Refprop from different folders or USB drives.

The SETMIX function, which allows the user to load a predefined mixture file from a list of available mixtures. This is useful for avoiding typing long lists of components and mole fractions.

The SETREF function, which allows the user to set a reference state for enthalpy and entropy calculations. This is useful for comparing results with different sources or standards.

The SATSPLN function, which allows the user to generate a saturation spline for a given fluid or mixture. This is useful for speeding up saturation calculations and improving accuracy near the critical point.

The CRITP function, which allows the user to calculate the critical point properties for a given fluid or mixture. This is useful for finding the maximum temperature and pressure where vapor-liquid equilibrium exists.

The PHASEFLAG flag, which allows the user to specify whether to return phase information or not in property calculations. This is useful for avoiding unnecessary phase calculations when only thermodynamic properties are needed.

The SATTPFLAG flag, which allows the user to specify whether to use saturation temperature or pressure as an input in property calculations. This is useful for avoiding ambiguity when both saturation temperature and pressure are given as inputs.

The SILENT flag, which allows the user to suppress error messages or warnings in property calculations. This is useful for avoiding interruptions or distractions when running batch or automated calculations.

### New plots and graphical interface

Another feature of Refprop 9 0 Portable is that it has new plots and graphical interface. Plots are graphical representations of data or results generated by Refprop. Graphical interface is the visual component of Refprop that allows the user to interact with the program using menus, buttons, icons, etc. Both plots and graphical interface are useful for visualizing and analyzing data or results from Refprop.

Refprop 9 0 Portable has added several new plots and graphical interface features to enhance the user experience. Some of these new plots and graphical interface features are:

The P-h diagram, which shows the pressure-enthalpy relationship for a given fluid or mixture. This plot is useful for analyzing refrigeration cycles and heat pumps.

The T-s diagram, which shows the temperature-entropy relationship for a given fluid or mixture. This plot is useful for analyzing thermodynamic processes and efficiency.

The P-T diagram, which shows the pressure-temperature relationship for a given fluid or mixture. This plot is useful for showing the phase behavior and critical point of a fluid or mixture.

The P-v diagram, which shows the pressure-specific volume relationship for a given fluid or mixture. This plot is useful for showing the compressibility and expansion of a fluid or mixture.

The x-y diagram, which shows the mole fraction-mole fraction relationship for a binary mixture at a given temperature or pressure. This plot is useful for showing the vapor-liquid equilibrium and azeotropic behavior of a binary mixture.

The x-T diagram, which shows the mole fraction-temperature relationship for a binary mixture at a given pressure. This plot is useful for showing the boiling point and dew point of a binary mixture.

The y-T diagram, which shows the mole fraction-temperature relationship for a binary mixture at a given pressure. This plot is useful for showing the bubble point and condensation point of a binary mixture.

The phase envelope, which shows the boundary between vapor-liquid equilibrium and single-phase regions for a given fluid or mixture. This plot is useful for showing the range of temperatures and pressures where vapor-liquid equilibrium exists.

The critical locus, which shows the locus of critical points for a given fluid or mixture as a function of composition. This plot is useful for showing the variation of critical temperature and pressure with composition.

The graphical interface has been improved with new icons, menus, buttons, tooltips, dialogs, etc. The graphical interface allows the user to easily access and modify the input and output parameters, select fluids and mixtures, perform calculations, generate plots and tables, save and load files, etc.

### New Excel file with examples and documentation

Another feature of Refprop 9 0 Portable