Household refrigerators: HFO performance as drop-in replacement for R-134a

During the IIR co-sponsored International Refrigeration and Air-conditioning Conference at Purdue in 2012, K.M Karber et al. from Oak Ridge National Laboratory, United States, presented* the results of a performance test on R1234yf and R1234ze, used as drop-in refrigerants to replace R134a in domestic refrigerators with no performance-enhancing modifications to the refrigerators.