Presentation No 1106 – Performance evaluation and optimization of lower GWP refrigerants in a residential heat pump – 14th IEA Heat Pump Conference, Chicago, USA
R-410A is the prevailing fluid in stationary air conditioning and heat pump applications. Its global warming impact, however, has garnered attention for lower GWP options. Existing alternatives include R-32 and R454B, which provide notable GWP reductions from R-410A (AR4 GWPs of 2088 vs. 675 and 465 respectively). Although R-454B may prove to be a long-term solution, system optimizations, such as variable speed compressor use and heat exchanger changes, enable the use of even lower GWP fluids. This paper explores the performance of several low GWP refrigerants (