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Due to the emerging attention to the environmental impacts of air conditioning, there has been a continuous effort to evaluate the heat transfer and pressure drop performance of alternative refrigerants that can substitute conventional working fluids like R410A. This seminar will highlight the performance of several low GWP and A2L refrigerants, including zeotropic mixtures of HFC/HFOs, under flow condensation process in heat exchangers. The seminar will also highlight conventionally ignored superheated and subcooled condensation process, challenges associated with condensation of zeotropic mixtures, and a novel modeling framework that will facilitate the design of next generation condensers for alternative refrigerants.

1. Thermal-Hydraulic Performance of Alternative Refrigerants Under Flow Condensation
   Kashif Nawaz, Ph.D., Member, Oak Ridge National Laboratory, Oak Ridge, TN
2. In-Tube Condensation of Low Global Warming Potential Refrigerants
   Tabeel Jacob, Ph.D., Student Member, Oregon State University, Corvallis, OR