| Air conditioning systems in vehicles use a vaporisation and condensation process. These systems employ a substance with a low boiling point, referred to as refrigerant. |
| The refrigerant used is tetrafluoroethane or R134a, which boils at -26.5°C at a vapour pressure of 1 bar. |
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| Physical properties of refrigerant R134a → Chapter |
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| Environmental aspects of refrigerant R134a → Chapter |
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