Refrigerant R134A - Skoda Citigo 2012 Workshop Manual

perature of the refrigerant. It is now considerably higher than the
ambient air temperature.
The high-temperature refrigerant and its heat content flow to the
condenser. There, because of the temperature difference be‐
tween the refrigerant and the ambient air, the refrigerant releases
heat into the ambient air via the condenser and liquefies.
The refrigerant is also a heat conveyor. As it will be re-used, it is
again pumped to the evaporator.
For this reason, the basic principle of all air conditioning systems
is a circuit for refrigerants. Differences arise in the composition of
the aggregates.
1.6

Refrigerant R134a

⇒ "1.6.1 Physical data of the refrigerant R134a", page 5
⇒ "1.6.2 Trade names and designations of the refrigerant R134a",
page 5
⇒ "1.6.3 Critical point", page 6
⇒ "1.6.4 Environmental aspects of the refrigerant R134a",
page 6
1.6.1 Physical data of the refrigerant R134a
The evaporation and condensation process is the procedure used
for all air conditioning systems in vehicles. Thus it works with a
lightly boiling substance, which is described as a refrigerant.
The refrigerant used is Tetrafluorethan R134a, which boils at
-26.5°C under a pressure of 1 bar.
Chemical formula
Chemical designation
Boiling point at 1 bar
Solidification point
Critical temperature
Critical pressure
1.6.2 Trade names and designations of the
refrigerant R134a
The refrigerant R134a is currently available under the following
trade names:
♦ H-FKW 134a
♦ SUVA 134a
♦ KLEA 134a
Note
In other countries, other trade names may also be common.
♦
Among the wide range of different refrigerants, only this re‐
♦
frigerant should be used for automobiles. The designation
"Frigen" or "Freon" are trade names. They also apply to re‐
frigerants that are not intended to be used for automobiles.
Citigo 2012 ➤ , Fabia 2000 ➤ , Fabia II 2007 ➤ , Fabia II 2009 ➤ , Fab ...
Air conditioning system with refrigerant R134a - Edition 10.2014
CH2F-CF3 or CF3-CH2F
Tetrafluorethan
-26.5°C
-101.6°C
100.6°C
39.56 bar (absolutely)
1. General notes on the air conditioning system
5