Refprop 91 Install 【2025-2027】
I hit Run as the installer window blinked awake: REFPROP 9.1 Setup. The lab bench hummed behind me — a kettle on, a fan cycling over servers, sticky notes that had morphed into a miniature city of reminders. Installing REFPROP felt like summoning a decades-old oracle: arcane thermophysical data, trusted equations, the collected whispers of fluids under pressure.
Step 1: Accept the agreement. The license text was long but familiar; I skimmed for the lines that mattered and clicked Accept. The installer asked where to place the files. Default was fine — C:\Program Files (x86)\REFPROP. I imagined folders stacking like neatly labeled canisters: mixture models, vapor tables, DLLs that would later answer frantic calls from MATLAB.
Step 2: Choose components. The list read like a chemist’s shopping list: binaries, libraries, documentation, example files, interactive GUI. I checked them all. The examples were important — they would be my way in on nights when equations refused to form pictures in my head. The install bar inched forward; progress, a thin green heartbeat across the screen.
The system prompted for the Fortran runtime — a companion expected to be present. It installed silently, like a hand sliding a key into a lock. A moment later, a dialog requested permission to set environment variables. Yes: add REFPROP to the PATH. The thought of invoking thermodynamic properties from any terminal felt like granting the software the freedom to be called wherever curiosity led.
Files unspooled: REFPROP.dll, REFPROP.exe, fluids directory rich with .FLD and .TAB files, folders named for refrigerants, noble gases, cryogens. I clicked through the documentation. In the example folder, a script plotted vapor pressure curves for R134a; even its sample plot looked deliberate, an old friend’s tidy handwriting.
Then the test. I opened the GUI. A white canvas greeted me: a list of fluids, a neat property table, small input boxes waiting for temperature and pressure. I typed 300 K, 101.325 kPa, selected water. Numbers appeared with polite speed — densities, enthalpies, sound speed — each value a tiny revelation. The DLL call from Python produced the same numbers; the MATLAB wrapper returned an array like a well-behaved pet.
Installation finished, but the ritual wasn't over. There was always one last, small task: acknowledgement. I saved a note in my project log — REFPROP 9.1 installed, PATH set, Fortran runtime present. A post-it on the monitor read: "Verify mixture routines next." The software had joined the toolkit, a precise instrument that would help tame steam cycles, refrigeration loops, and irreverent exam questions.
Later that evening, I ran a transient condensation model. The solver chewed through REFPROP lookups, interpolations, and behind-the-scenes fits, and spat out a temperature profile that matched the empirical curve I still had pinned under a magnet. I felt like a conductor whose orchestra was finally in tune. REFPROP wasn't just installed; it had become the thread joining data, model, and experiment.
I shut the lab lights and walked toward the door, leaving the computer screen gently aglow. The installer’s last message lingered in the system tray — a small, satisfied icon. In the morning, I would return with coffee and a longer list of problems. For now, the installation was a quiet victory: the door was open, the fluids catalogued, and a universe of thermodynamic questions waiting to be asked.
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 refprop 91 install
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. I hit Run as the installer window blinked awake: REFPROP 9
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 Open Microsoft Excel (2007, 2010, 2013, 2016, or 2019)
) file and meticulously moved it to a trusted folder, avoiding the treacherous default path that Excel often rejected. The Connection: Through the Excel
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 —
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.
The installer offers two typical options:
Note: Even on 64-bit Windows, REFPROP 9.1 installs to the Program Files (x86) folder because it is a 32-bit application.
The true power of REFPROP 9.1 lies in its use as a calculation engine for other programs. The installer automatically places the necessary files here:
