3 Optimizing Mini-Split Air Conditioning Units Using Alternative Refrigerants

Bo Shen, Ph.D., ORNL
Developments in the Montreal Protocol include the development of a global consensus
to phase-down the use of HFC refrigerants, as well as the continuing transition among
developing countries to phase-out the use of HCFC and introduce HFC as potential
intermediary solution. This presentation covers efforts to develop optimized system designs
for mini-split AC units used in developing and high ambient countries using alternative
lower global warming potential refrigerants. There are available
candidate refrigerants that can be introduced during the current phase-out transition in
order to eliminate a costly 2-step transition from HCFC to HFC and HFC to lower GWP
solutions.

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