New blends for the substitution of R134a

For application in commercial refrigeration, other standard applications and ranging to automotive air conditioning, blends with low global warming potential are developed. Amongst those registered at ISO are substitutes for R134a with GWP below 750 and similar refrigeration capacity, but also some targeting GWP AR4 below 150 with reduced capacity. The demand for GWP below 150 of the EU F-Gas Regulation for compressor racks in food retail can be fulfilled e.g. for new systems utilizing direct cooling with an A1 refrigerant and some more volume flow.

Refrigerant

Normal boiling point
in °C

Normal dew point
in °C

Safety class

GWP
AR4

GWP
AR6

Application

R471A

-16,8

-14,6

A1

148

148

Medium temp, AC

R474A

-43,1

-36,4

A2L

2

Automotive AC with higher capacity than R1234yf

R475A

-28,8

-28,3

A1

619

695

Medium temp, AC

R476A

-19,1

-16,1

A1

156

Medium temp, AC

R516A

-29,4

-29,4

A2L

142

153

Medium temp, AC