Seminar 43 -- Current Understanding and Gaps of Stability and Compatibility of Low GWP Refrigerants PDF

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Increasing concerns about the impact of refrigerants on the environment are driving new regulatory policies to restrict and lower the global warming potential (GWP) impact of fluorocarbon refrigerants used in the HVAC&R industry. In response, the industry is developing and examining a new class of lower GWP refrigerants, many of which are potentially less stable chemistry. As this transition moves forward, many questions exist about chemical stability and materials compatibility of these molecules in these applications. This seminar will highlight research of these next-generation refrigerants and how they interact with common materials of construction and chemicals.

1. An Update on Low GWP Refrigerant Material Compatibility and Lubricant Research
   Xudong Wang, Ph.D., Member, Air-Conditioning, Heating and Refrigeration Technology Institute, Arlington, VA
2. A Review of the Compatibility of Low GWP Refrigerants with Plastics, Elastomers and Compressor Materials
   Rosine Rohatgi, Ph.D., Member, Spauschus Associates Inc., Atlanta, GA
3. A Review of the Thermal Stability of Low GWP Refrigerants and Their Compatibility with Lubricants
   Rosine Rohatgi, Ph.D., Member, Spauschus Associates Inc., Atlanta, GA
4. Understanding Stability Limits and System Chemistry in Low GWP Refrigerant Applications
   Joe Karnaz, DSc, Member, Shrieve Chemical, Houston, TX