Comprehensive experimental evaluation of R1234yf-based low GWP working fluids for refrigeration and heat pumps

• R516A, R513A, and R1234yf are compared as alternatives to R134a. The first experimental results of the R516A blend presented. R513A presents highest overall system performance by enhancement 2% in cooling mode. In mode, shows COP at low evaporating temperatures ranging from (1 15%). This work an comparison for GWP refrigerants used vapour compression heating systems. study compares three lower global warming potential (GWP) (R513A, R1234yf) drop-in replace hydrofluorocarbon (HFC) Measurements taken a test rig different steady-state conditions: temperature is −5 °C, −10 °C −15 combined with two condensing (32.5 40 °C), internal heat exchanger (IHX) effectiveness. Besides, 7.5, 15 22.5 five (55 75 step 5 °C). presented amongst alternatives, increasing up 8%. lowest evaporation temperature; however, it exhibits capacity temperature. IHX positively influences refrigerating effect all adopted refrigerants. Regarding average 3% increase, whereas results. comparable R134a, especially higher temperatures.