CARE 30 is a refrigerant consisting of a blend of isobutane (R-600a) and propane (R-290) developed to replace dichlorodifluoromethane (R-12) and 1,1,1,2-tetrafluoroethane (R-134a). It is primarily for use in small commercial refrigeration and air-conditioning systems that have traditionally used R-12.
It operates at similar pressures and possesses similar volumetric refrigerating effect to R-12 and R-134a. It must be used with a specific CARE 30 compressor. It can be used with R-12 or R-134a heat exchangers and expansion devices. It is compatible with most common refrigeration materials and lubricants.
Comparison with R-12 and R-134a
|Temperature Range||high, medium||-||-|
|Ozone depletion potential (CFC-11=1)||0||0.9||0|
|Global warming potential (CO2=1, 100yr ITH)||3||10600||1600|
|Normal boiling point (1.0 bar, abs)||-31 °C||-30 °C||-26 °C|
|Latent heat (1.0 bar, abs)||367 kJ/kg||145 kJ/kg||189 kJ/kg|
|Refrigerant mass charge size (R-12=100%)||41%||100%||91%|