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 (R134a alternatives). 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. The lower volumetric capacity of the respective blends, compared to R134a, require the use of compressors with increased volume flow.