Table of Contents
Advertisement
Konfort Series 700R Service Manual
The directive also requires that, starting from January 1
new registered cars will be prohibited to have air-conditioning systems
containing fluorinated gases with GWP> 150.
The refrigerant R134a, which is currently used in the A/C systems of
vehicles with a mass less than 3,5 tones, has a GWP factor = 1400: this
means that its global warming potential is 1400 times higher than the
one of carbon dioxide.
According to the new constraints imposed by the EU Directive, the new
refrigerant that has been established for the air conditioning systems of
new registration vehicles will be the R1234yf, because characterized by
a very low global warming potential (GWP = 4).
Table 1.1 – GWP coefficients of the two refrigerants
1.3
Features of the new refrigerant R1234yf
The decision to opt for the new refrigerant R1234yf is dictated by some of
its interesting features:
excellent environmental properties in relation to the greenhouse
effect (GWP=4).
reduced levels of acute and chronic toxicity, such as the ones of
R134a. The refrigerant R1234yf does not constitute any risk of
exposure due to chemical toxicity.
very similar performances to the ones of R134a: R1234yf is
thermally stable and compatible with R134a system components. This
can lead to a potential direct replacement of the refrigerant in current
systems employing R134a (through appropriate conversion kits).
slight flammability: R1234yf is classified as a slightly-flammable
liquid. However, even if ignited, this refrigerant would burn only
weakly,
with
therefore, absolutely manageable.
Copyright © 2014 – TEXA S.p.A.
Refrigerant
R134a
R1234yf
CO
2
compared to that of carbon dioxide
very
limited
effects.
5
TEXA Technical Assistance
st
, 2017, all the
GWP
1400
4
1
That
flammability
would
be,
Advertisement
Table of Contents
