In the U.S., R22 refrigerant will no longer be permitted in new installations beginning in January 2010. As a result, many large refrigeration systems now use R134a, which has a lower global warming potential. For systems with screw compressors, this change also provides another benefit: R134a improves the COP of the compressors by 5 to 10 percent, which increases the overall efficiency of the system. To meet this market need, Bitzer currently offers 16 CSH model compressors that are optimized for use with R134a.
R134a and Screw Compressors
October 1, 2009