1 Scroll Chillers: Conversion from HCFC-22 to HFC-410A and HFC-407C

Hydrofluorocarbon (HFC) refrigerants are critical to the safe and cost-effective phase-out of ozone depleting chlorofluorocarbon (CFC) and hydrochloroflurocarbon (HCFC) refrigerants in developing and developed countries (IPCC/TEAP 2005). As replacements for less energy-efficient, older equipment, HFC systems conserve energy and reduce the generation of global warming gases at electric power plants. These systems are being used in accordance with responsible-use principles, which range from recovery and reuse of HFCs, to well-designed HFC-production plants that aim to achieve zero HFC emissions. For scroll chillers, the most popular HCFC-22 (R-22) replacement options include: • HFC-410A (R-410A) a zeotropic mixture of 50 % HFC-32 and 50 % HFC-125 with a low glide o