HFC blend Refrigerant R424A known as RS-44b R22 Replacement 


الحمد لله والصلاة والسلام على رسول الله وعلى آله وصحبه أجمعين

HFC blend Refrigeran R424A known as RS-44b R22 Replacement

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HFC blend
HFC blend Blend of
HFCs R125 + R134a + HCs R600, R600a + R601a

HFC 134a 47%
HFC 125 50.5%
iso-pentane 0.6%
n-butane 1%
Isobutane 0.9%

Chemical names

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tetrafluoroethane
pentafluoroethane
iso-pentane
n-butane

Isobutane

Lower GWP than most of R22 replacements
ozone depletion potential safe
Non toxic and non flammable safe

R424A RS-44 PHYSICAL PROPERTIES

RS-44 vs R22

Molecular weight 108.1 86.5
Boiling point (1 atm) C -38.7 -40.8
F -37.6 -41.4

Critical temperature C 88.8 96.1
F 191.8 204.8

Critical pressure bar 40.4 49.9
psi 586 724

Liquid density at 25 C kg/m3 1169 1191

Density of saturated vapour
at 25 C kg/m3 43.6 44.2

Specific heat of liquid
at 25oC kJ/kg C 1.43 1.26

Specific heat of vapour
at 1 atm & 25 C kJ/kg C — —

Vapour pressure
at 25 C bar 9.67 10.4
psi 140.2 151

Latent heat of vaporisation
at boiling point kJ/kg 196 234

Ozone Depletion Potential ODP 0 .055

Flammability limit
in air (1 atm) vol% None None

Inhalation exposure
8 hr day & 40 hr week ppm 1000 1000

في أمان الله

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