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Air conditioning systems with refrigerant R1234yf - General information - Edition 07.2017
Note
♦ Refrigerants used in motor vehicles must not be mixed to‐
gether. Only the refrigerant prescribed for the respective air
conditioning system may be used.
♦ The vapour pressures of the two refrigerants, R1234yf and
R134a, are very similar across a broad temperature range,
which is why no difference can be established between them
⇒ Air conditioning system with R134a refrigerant, General in‐
formation about the air conditioning system . It is only possiblelk
to determine a difference using relevant sensors, which can
analyse the chemical structure of the refrigerant
⇒ “6.2.16 Analysis of refrigerant R1234yf”, page 24 .
6.2.5
Environmental aspects of refrigerant
R1234yf
♦ R1234yf is a fluorocarbon (FC) and contains no chlorine.
♦ R1234yf has a shorter atmospheric life than R12 and R134a
refrigerant and therefore has a less significant greenhouse ef‐
fect (lower global warming potential).
♦ R1234yf does not damage the ozone layer, the potential to
reduce the amount of ozone is zero (as is the case with
R134a).
♦ The global warming potential (GWP) of R1234yf is 4 (the GWP
for carbon dioxide is 1).
♦ The contribution of R1234yf towards global warming is lower
than the R134a refrigerant by a factor of “350” (GWP of R134a
is about 1400).
Note
♦ The global warming effect of substances is calculated accord‐
ing to various methods based on their effect over a period of
100 years, which is why the results differ (e.g. R134a has a
GWP between 1300 and 1450).
♦ In order to compare the impact of various greenhouse gases
on the earth atmosphere, a calculation is carried out using the
carbon dioxide equivalent. The refrigerant R1234yf has a
GWP of 4, i.e. 1 kg of this refrigerant has the same impact on
the earth atmosphere as 4 kg of carbon dioxide (“CO ”).
2
6.2.6
Trade names and designations of
R1234yf refrigerant
Refrigerant R1234yf is currently available under the following
trade names:
♦ H-FKW 1234yf
♦ HFO 1234yf
♦ “Opteon yf” or“ Solstice yf” (examples of company names)
6. Basic technical and physical properties
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English 