Environmentally-friendly advanced transcritical CO2 refrigeration system

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This research program builds upon prior experimental and numerical work funded by NSERC to investigate the use of carbon dioxide (CO2) as a natural refrigerant in automotive air-conditioning systems in particular, with a further general application to residential and commercial systems. Ozone depletion potential and global warming potential are the two established indicators for the direct environmental impact of the release of refrigerants. The hydrofluorocarbon (HFC) refrigerants, which were once expected to be acceptable permanent replacement fluids, are now on the list of regulated substances due to their impact on climate change. The current application of high global warming potential refrigerants such as R-134a has led to the revival of CO2 as a naturally occurring refrigerant.