Simulation and assessment of the leakage characteristics and suitability of Rhone-Poulenc's ‘ISCEON 69’ blends as refrigerants

Abstract

This paper is the result of investigations into the need for an interim refrigerant to replace R502 as the standard deep-cold refrigerant for use in the demanding transport refrigeration business. The Montreal Protocol on Substances that Deplete the Ozone Layer identified HCFCs as being part of the interim solution to the phasing out of CFCs. Some designers of transport refrigeration equipment chose to move to pure R22 to meet proposed legislative constraints. This work shows that there is a better solution to deep-cold refrigeration than pure R22, one which does not render current fleets obsolete, and one which leaves the way open to chlorine-free HFC-based refrigerants as they evolve. It would clearly hasten the introduction of a HCFC blend and subsequent elimination of CFC R502 if the constituents were non-toxic and well-known chemicals: ISCEON 69L satisfies this requirement.