Refrigerant R134A Physical Data
WARNING: This page is about a different car, the 2021 Audi S4 and 2021 Audi A4 Quattro. However, it is still accessible from the selected car via links, so may be relevant.
Vehicle air conditioning systems make use of the vaporization and condensation process. In this case, one works with a substance which boils easily, designated as refrigerant.
The refrigerant used is tetrafluoroethane R134a, which boils at -26.5 °C (-15.7 °F) at a vapor pressure of "1 bar (14.5 psi)" (absolute pressure corresponds slightly to the ambient pressure).
| Chemical formula | CH2F-CF3 or CF3-CH2F |
| Chemical designation | Tetrafluoroethane |
| Boiling point at 1.0 bar (14.5 psi) | 26.5 °C (79.7 °F) |
| Solidification point | 101.6 °C (214.88 °F) |
| Critical temperature | 100.6 °C (213.08 °F) |
| Critical pressure | 40.56 bar (588.27 psi) |