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R134a Properties Excel

1,1,1,2-Tetrafluoroethane (HFC-134a) Tables


R134a Tables Excel Add-In

For Excel 97 or better



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About R134a Tables Excel Add-In

The R134a Tables Excel Add-In library calculates 23 thermodynamic properties of R134a (1,1,1,2-Tetrafluoroethane). It allows 11 different combinations of input variables to be used for calculations.

Input variables that can be used are:
  1. pressure,
  2. temperature,
  3. enthalpy,
  4. entropy,
  5. volume,
  6. internal energy,
  7. and quality (vapor mass fraction).
The library is fully integrated in Excel, and available functions can be used in the same way as any other Excel function.


Main features of the library:
  • Professional quality, industrial strength software;
  • Based on the formulation for advanced technical applications;
  • Accurate and thoroughly tested;
  • Create User Defined Functions (UDF) which use R134aTables functions;
  • Developed in C++ for maximum speed;
  • Easy to install and easy to use;
  • For installation and use of the library no administrator rights required;
  • After installation no computer restart required;
  • One year free technical support.



The following figure shows a sample spreadsheet included in the download package.



R134a Tables Excel Add-In - Sample calculations in Excel


Used Formulation

For thermodynamic properties the library uses new industrial formulation for R134a (1,1,1,2-Tetrafluoroethane), formulated in Helmholtz energy. It is intended to be used for advanced technical applications.

Equation of state was presented in "Equations of State for Technical Applications" by R. Span and W. Wagner, International Journal of Thermophysics, Vol.24, No.1, January 2003.














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