Refprop 91 Install Link Guide

The installation of NIST REFPROP 9.1 is a straightforward process for the standalone application, though linking it with tools like Excel requires additional manual configuration. 1. System Requirements

Before beginning, ensure your system meets these basic needs:

Operating System: Windows 98, 2000, XP, Vista, 7, 8, or similar (both 32-bit and 64-bit are supported).

Disk Space: Approximately 10–20 MB of available hard disk space. 2. Core Installation Steps

The primary installation typically occurs from a CD-ROM or an executable installer file.

Launch Installer: If using a CD, insert it and run the setup file (e.g., D:\NIST2391.EXE). If you have a downloaded version, double-click the .exe file (often named nist2391.exe).

Follow the Wizard: The setup wizard will guide you through the license agreement and destination folder selection. The default installation path is usually C:\Program Files\REFPROP or C:\Program Files (x86)\REFPROP.

Verification: Once finished, you can launch the graphical user interface (GUI) to calculate thermodynamic properties and view tables or plots. 3. Linking with Excel (Windows)

To use REFPROP functions directly in Excel spreadsheets, follow these steps to set up the Add-In:

Prepare the Add-In: Locate REFPROP.xls in your installation folder and save it as an Excel Add-In (.xla or .xlam) in the same directory.

Add Trusted Location: In Excel, go to File > Options > Trust Center > Trust Center Settings > Trusted Locations. Click Add new location and browse to your REFPROP folder (e.g., C:\Program Files\REFPROP).

Enable the Add-In: Go to File > Options > Add-ins. In the Manage drop-down at the bottom, select Excel Add-ins and click Go. Click Browse, navigate to your installation folder, select the .xla or .xlam file, and ensure it is checked in the list. Configure Environment Variables (Optional but Recommended):

Create a new user environment variable named RPPrefix and set its value to your installation path (e.g., C:\Program Files\REFPROP).

Add your installation path to the existing Path variable to ensure Excel can always locate the required DLLs (REFPROP.DLL or REFPRP64.DLL). 4. Common Troubleshooting Answers to Frequently Asked Questions - NIST Pages

Once upon a time in the high-stakes world of thermodynamic research, an engineer named Sarah faced a daunting challenge. Her mission: install REFPROP 9.1 , the legendary software from

used to calculate the properties of industrially vital fluids. The Quest for the Installer

Sarah’s journey began with a search for the sacred installation files. Unlike modern apps, REFPROP 9.1 often arrived on a physical CD-ROM. She inserted the disc and carefully ran the installer, watching as it carved out its home in C:\Program Files\REFPROP

. For those without the full version, a "mini" version was sometimes used as a starter. The Excel Trial

The real test came when Sarah tried to link REFPROP to Excel. She knew this was no simple task—it required the precision of a master builder. The Add-In: She located the REFPROP.xlam REFPRP91.XLA

) file and meticulously moved it to a trusted folder, avoiding the treacherous default path that Excel often rejected. The Connection: Through the Excel refprop 91 install

menu, she browsed to her folder and enabled the link, ensuring the "Refprp91" box was checked. The Proof: She typed a magic formula: =Density("water","TP","SI",300,1)

. When the cell returned a perfect value instead of an error, she knew the bond was sealed. The Shadow of the Past

Later, Sarah faced a "ghost" from her installation. When she eventually upgraded to Version 10

, the old Version 9.1 wouldn't leave quietly. To banish it, she had to perform a ritualistic "clean uninstall," hunting down hidden folders in and deleting lingering files from her system path. me4293 download and setup mini refprop for students 24-Sept-2020 —

Integrating REFPROP 9.1 (Reference Fluid Thermodynamic and Transport Properties) is a straightforward process, but it requires precise file placement to ensure it communicates correctly with external software like Excel, MATLAB, or Python. 1. Initial Extraction and Setup

The installation typically begins with the executable provided by NIST. Run the installer to unpack the high-accuracy property models and the graphical user interface. By default, the program installs to C:\Program Files (x86)\REFPROP

If you plan on using REFPROP with third-party wrappers (like Python’s

), many users prefer installing it to a simpler path without spaces, such as C:\REFPROP , to avoid path-string errors in code. 2. Linking the DLL The core of REFPROP is the REFPROP.DLL file. For the software to be "visible" to your system: System Environment Variables: Add the REFPROP installation folder to your Windows

. This allows other programs to call the DLL without you having to copy the file into every project folder. 32-bit vs. 64-bit:

Ensure you are using the version of the DLL that matches your calling application. REFPROP 9.1 includes both; the 64-bit version is often named REFPRP64.DLL 3. Integration with Excel To use REFPROP functions directly in spreadsheets: Open Excel and go to Options > Add-ins Excel Add-ins Browse to your REFPROP directory and select REFPROP.xlam Refprop.xla for older versions). Once enabled, you can use formulas like =Theoretical("T","Density", "SI", "Water") directly in cells. 4. Verification After installation, always run the standalone REFPROP GUI

first. If you can calculate a simple saturation table for a common fluid like Nitrogen, the underlying fluid files (.FLD) and mixture files (.MIX) are correctly placed. Are you planning to use REFPROP primarily through the Excel Add-in or via a programming language like

Guide to Installing NIST REFPROP 9.1 NIST REFPROP (Reference Fluid Thermodynamic and Transport Properties) version 9.1 is a widely used software for calculating the thermophysical properties of industrially important fluids and their mixtures. While it has been officially superseded by REFPROP Version 10

, many researchers and engineers continue to use version 9.1 for consistency with older projects. System Requirements

Before beginning the installation, ensure your system meets these basic requirements: Operating System

: Windows 98, 2000, XP, Vista, 7, 8, or similar (both 32-bit and 64-bit are supported). Disk Space : Approximately 10–20 MB of available hard disk space. Core Installation Procedure

The standard installation typically involves a setup executable provided by NIST. Run the Installer : Locate your installation file (often named nist2391.exe or found on a provided CD-ROM). Follow the Wizard

: Execute the file and follow the on-screen prompts. The default installation path is usually C:\Program Files\REFPROP

: It is recommended to keep this default path as many external wrappers (like Excel) look for this specific directory. Environment Variables (Optional but Recommended)

: To access REFPROP from other applications, you may need to set specific environment variables: The installation of NIST REFPROP 9

: Set this variable to point to your main installation directory (e.g., C:\Program Files\REFPROP

: Add the REFPROP directory to your system's "Path" variable to allow the system to locate the REFPROP.DLL Linking REFPROP 9.1 with Microsoft Excel

One of the most common ways to use REFPROP 9.1 is through its Excel Add-in. Locate Add-in Files REFPRP91.XLA REFPROP.xlam is in your main installation folder. Add Trusted Location In Excel, go to

File > Options > Trust Center > Trust Center Settings > Trusted Locations C:\Program Files\REFPROP as a trusted location to ensure macros can run. Activate the Add-in File > Options > Add-ins At the bottom, select Excel Add-ins from the "Manage" dropdown and click Browse to your REFPROP folder and select the Verify the Connection : Test a simple command in a cell, such as =Density("water","TP","SI",300,1) , to ensure properties are being pulled correctly. Troubleshooting Common Issues Answers to Frequently Asked Questions - NIST Pages

The installation of REFPROP 9.1 (Reference Fluid Properties) follows a specific process depending on whether you are using the standalone program or integrating it with Microsoft Excel. Core Installation Steps

To install the base version of REFPROP 9.1, you typically need the original installation media (CD-ROM) or a digital installer purchased from NIST.

Run the Installer: Execute the nist2391.exe or Setup.exe file from your installation source.

Default Directory: The program usually installs to C:\Program Files\REFPROP (or C:\Program Files (x86)\REFPROP on 64-bit systems).

System Requirements: It is designed for Windows environments; older documentation suggests compatibility back to Windows 95/NT, but it remains functional on modern Windows 10/11 systems with proper user permissions. Linking to Microsoft Excel

Integrating REFPROP 9.1 with Excel is one of its most common uses, allowing you to use thermodynamic functions directly in spreadsheets. Trusted Locations:

Open Excel and go to File > Options > Trust Center > Trust Center Settings.

Under Trusted Locations, click Add new location and browse to your REFPROP folder (e.g., C:\Program Files\REFPROP). Add-in Setup: Go to File > Options > Add-ins.

At the bottom, select Excel Add-ins in the "Manage" box and click Go.

Click Browse and locate the REFPRP91.XLA file in your REFPROP folder. Ensure "Refprp91" is checked in the list. Special Cases: macOS and Version Conflicts

macOS Installation: Installing on Mac requires creating specific directory structures in the Group Containers folder for Office and manually copying fluids, mixtures, and the librefprop.dylib file.

Upgrading to Version 10: If you have REFPROP 10 installed, you can still use the 9.1 interface for backward compatibility. NIST provides a specific REFPRP91.XLA patch to help version 10 users run older spreadsheets without changing formula syntax.

Uninstallation Issues: If an installation fails, ensure you run the unins.exe utility in the REFPROP folder to clear registry entries before attempting a fresh install.

Are you planning to use REFPROP 9.1 primarily for Excel macros or as a standalone GUI for fluid property tables?

REFPROP | NIST - National Institute of Standards and Technology Operating System: Windows 10 (or later), Windows 7

REFPROP 91 Installation and Overview

Introduction

REFPROP (Reference Properties) is a comprehensive thermodynamic property database developed by the National Institute of Standards and Technology (NIST). REFPROP 91 is the latest version of this software, which provides accurate and reliable thermophysical property data for a wide range of pure fluids and mixtures. This write-up provides a detailed overview of the REFPROP 91 installation process and its key features.

System Requirements

Before installing REFPROP 91, ensure that your system meets the following requirements:

Operating System: Windows 10 (or later), Windows 7 (or later), or macOS (with Wine or virtual machine)
Processor: 64-bit processor
RAM: 8 GB (or more)
Disk Space: 2 GB (or more)

Installation Steps

Download REFPROP 91: Visit the NIST website (https://physics.nist.gov) and navigate to the REFPROP download page. Select the version compatible with your operating system (Windows or macOS).
Run the Installer: Once the download is complete, run the installer (.exe file for Windows or .dmg file for macOS). Follow the prompts to begin the installation process.
License Agreement: Read and accept the license agreement.
Choose Installation Location: Select the installation directory (default location: C:\Program Files\REFPROP on Windows or Applications/REFPROP on macOS).
Select Components: Choose the components to install, including the REFPROP executable, property data, and any additional languages.
Installation: The installer will copy the necessary files to your system.
Activation: Upon first launch, REFPROP 91 will prompt for activation. Follow the on-screen instructions to activate the software using the provided license key.

Post-Installation

After installation, REFPROP 91 can be launched from the Start menu (Windows) or Applications folder (macOS). The software's graphical user interface (GUI) provides access to various features, including:

Fluid Selection: Choose from a list of over 1,300 pure fluids and mixtures.
Property Calculations: Calculate thermophysical properties, such as density, viscosity, and thermal conductivity.
Phase Diagrams: Generate phase diagrams for pure fluids and mixtures.
Data Export: Export calculated properties and phase diagram data to various formats (e.g., CSV, Excel).

Key Features

REFPROP 91 offers several key features:

Accurate Property Data: REFPROP provides accurate and reliable thermophysical property data, based on internationally accepted standards.
Comprehensive Fluid List: The software includes a vast list of pure fluids and mixtures, including refrigerants, hydrocarbons, and other common substances.
User-Friendly Interface: The GUI is intuitive and easy to navigate, making it simple to perform calculations and generate phase diagrams.
Export Options: Calculated properties and phase diagram data can be exported to various formats for further analysis.

Troubleshooting

If you encounter issues during installation or while using REFPROP 91, consult the NIST support resources:

User Manual: Refer to the comprehensive user manual for detailed instructions and troubleshooting guides.
FAQs: Visit the NIST REFPROP FAQ page for answers to common questions.
Support Email: Contact NIST support via email for assistance with installation or technical issues.

Conclusion

REFPROP 91 is a powerful tool for calculating thermophysical properties of pure fluids and mixtures. By following the installation steps outlined above, users can easily install and activate the software. With its comprehensive fluid list, accurate property data, and user-friendly interface, REFPROP 91 is an essential resource for researchers, engineers, and students working with thermodynamic properties.

Here’s a helpful feature for installing REFPROP 9.1 (assuming you meant version 9.1, since REFPROP 10.x is more common now — but if you meant NIST REFPROP 9.1, the following applies):

Step 4: Configure the Fluid File Path (Crucial for External Calls)

REFPROP 9.1 uses environment variables to locate its fluid data (fluids\, mixtures\). Sometimes the installer does not set this correctly.

After installation, navigate to C:\Program Files (x86)\REFPROP.
Locate and run REFPROP.exe once. If it opens without error, the path is set.
If you see “Error: Fluid files not found”, do the following:
- Open Control Panel > System > Advanced System Settings > Environment Variables.
- Under System variables, click New.
- Variable name: RPPROG
- Variable value: C:\Program Files (x86)\REFPROP
- Click OK and restart the program.

Step-by-Step Installation Procedure

Check 2: Test the Excel Add-in

Open Microsoft Excel (2007, 2010, 2013, 2016, or 2019). Go to File > Options > Add-ins. Look for “NIST REFPROP Add-in” under Active Application Add-ins. If not listed, manually load it via Browse and navigate to:

C:\Program Files (x86)\REFPROP\REFPROP.xla

Type =REFPROP("Water","T","P",300,101.325) into a cell. It should return a density value.