Chiller refrigerants proposed as alternatives to HFCs include R-717, hydrocarbons, carbon dioxide, and new unsaturated HFCs such as HFC-1234yf.
拟议替代氢氟碳化合物的冷冻机制冷剂有R-717、碳氢化合物、二氧化碳和HFC-1234yf等新的不饱和氢氟碳化合物。