A thermodynamic property calculator for LNG and natural gas with the ability to perform vapour-liquid-solid equilibrium calculations, capture the complex solid formation regions seen in literature and generate full phase envelopes.

To install ThermoFAST, simply download the link, and extract the “.zip” file anywhere on your hard drive. Once extracted simply double click on the ThermoFAST icon to begin using the tool. Because it’s an .exe file you may need administrator privileges:

For Windows 7: if a warning box appears please untick the box marked ‘always ask before opening this file’, then click ‘OK’ to proceed.

For Windows 10: an information box entitled “Windows protected your PC” may appear, with the message “Windows Defender SmartScreen prevented an unrecognized app from starting. Running this app might put your PC at risk.” In this case click on the shaded text “More info” to reveal the “Run anyway” button. Press “Run anyway” to proceed.

User documentation is available through the user interface.

If you have any feedback, questions about the software or want continuous updates on our product, please don’t hesitate to contact any of the following developers:

  • Corey Baker:
  • Eric May:

By downloading the GPA version of ThermoFAST software you agree to the terms and conditions outlined in the End User License Agreement. To download the GPA version of ThermoFAST, please click here.

The most current version of ThermFAST is 1.2.1, which was released on 16 March 2020. Improvements in this version include:

  • More accurate solids equilibria binary interaction parameters for carbon dioxide + methane, neo-pentane + methane, p-xylene + methane, and p-xylene + ethane
  • Elimination of format issues for European versions of Windows

The GPA Midstream-sponsored database of cryogenic solubility measurements for binary mixtures of natural gas components is available at the following link.

To learn how to install and use the ThermoFAST tool, watch the videos below: