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Evaluation of Fluid H as a Refrigerant for Automotive Air Conditioning
Published May 20, 2007 by Institution of Mechanical Engineers in United Kingdom
In support of the pending phase-out of R134a in Europe, Honeywell has developed and introduced an ultra-low global warming potential (GWP) hydrofluorocarbon-based refrigerant. The new refrigerant, a two-component mixture referred to as "Fluid H", has properties similar to those of R134a. Nevertheless, the refrigerant system components will have to be redesigned to take advantage of the unique properties of Fluid H. This paper explores the fundamental property differences between R134a and Fluid H and examines experimental data obtained from both bench-top hardware and real-world, in-vehicle driving. With very minor hardware modifications the performance of the Fluid H system nearly matched that of an R134a baseline system