17
6.2.1 REFRIGERANTS GENERAL INFORMATION
Table
6.2.1
Refrigerant glide - Single component refrigerants evaporates and condense at constant temperature,
bubble point temperature and dew point temperature are the same. Some refrigerants mixtures, classified
as zeotropic refrigerants, have a measurable temperature change during evaporation or condensing process.
This temperature change is described as "glide“. The "glide“ depends on the mixture substances and their
compositions. As a consequence of "glide“, different temperatures are measured at inlet and outlet of heat
exchangers. For correct performance evaluation of zeotropic refrigerants with the glide more than 1K, the
average evaporator temperature and average condenser temperature shall be considered.
ACCORDING TO
EN378
R404A
R452A
R449A
R448A
R134a
R513A
CHEMICAL
NAME
Mixture
R125/R143a/
R134a
Mixture
R32/R125/
R1234yf
Mixture
R32/R125/
R1234yf/ R134a
Mixture
R32/R125/
R1234yf/R134a/
R1234ze (E)
1,1,1,2-
tetrafluoro-
ethane
Mixture
R134a/R1234yf
MOLECULAR
FORMULA
Weight %
(44/52/4)
Weight %
(11/59/30)
Weight %
(24.3/24.7/
25.3/25.7)
Weight %
(26/26/20/21/7)
CH2FCF3
Weight %
(44/56)
SAFETY CLASS
A1
A1
A1
A1
A1
A1
PED FLUID GROUP
2
2
2
2
2
2
PRACTICAL LIMIT
[kg/m
3
]
0.52
0.423
0.357
0.388
0.25
0.319
ATEL/ODL
[kg/m
3
]
0.52
0.423
0.357
0.388
0.21
0.319
LFL [kg/m
3
]
NF (*)
NF (*)
NF (*)
NF (*)
NF (*)
NF (*)
VAPOUR DENSITY
25°C,
101.3 KPA [kg/m
3
]
3.99
4.30
3.62
3.58
4.17
4.256
MOLECULAR MASS
[g/mol]
97.6
103.51
87.21
86.28
102
108.4
NORMAL BOILING
POINT
[°C]
– 46.5 to – 45.7
-47 to -43.2
-46 to -39.9
-45.9 to -39.8
-26
-29.05
ODP
0
0
0
0
0
0
GWP
[100 yr ITH]
3922
2140
1397
1387
1430
631.4
AUTOIGNITION
TEMPERATURE
[°C]
728
ND
ND
ND
743
ND
CRITICAL
TEMPERATURE
[°C]
72.12
74.9
81.5
83.7
101.06
96.5
CRITICAL PRESSURE
[kPa abs]
3734.9
4001.7
4447
4660
4059.3
3766
TEMPERATURE
GLIDE AT 1 BAR ABS
PRESSURE [K]
0.75
0.38
0.61
0.63
0
0.1
(*) NF signifes non-flammable.
Note: HFC refrigerants (R404A, R452A, R449A, R448A, R134a and R513A) are classified in Safety Class A1 -
lower toxicity, no flame propagation, (according to ISO817).
