As the phase-out date for R-123 in approaches, alternative low pressure refrigerants are being identified and qualified for use in new and existing chiller products. This paper summarizes chemical stability evaluations that were conducted in the laboratory and in operating equipment to evaluate the system chemistry of refrigerant alternatives R-514A and R-1233zd(E). Chemical stabilities of refrigerants 514A and 1233zd(E) were proven to be similar to or better than R-123, and both refrigerants have been qualified for application in a range of centrifugal compressor-based chiller products. R-1233zd(E) has higher operating pressures than R-123 and is applied in new equipment designs.
See more of: Refrigeration Systems and Low GWP Refrigerants