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R32 is a chlorine-free, ozone-safe fluorocarbon whose boiling point is -52°C. R32 is a component of R410a, a blend refrigerant widely used in developed coun-tries as a main alternative to HCfC-22, an ozone depleting refrigerant. But R410a has a high global Warming Potential (hereafter, gWP) of 2088, so a new refrigerant
R-32 is the most balanced refrigerant in terms of environmental impact, energy efficiency, safety, and cost-effectiveness. Refrigerant is a medium for conveying heat. Air conditioners transfer heat while circulating refrigerant between the indoor and outdoor units.
Most refrigerants used today are hydrofluorocarbons (HFCs). Although there are many different HFC gases, the industry has been primarily using a combination of four: R-32, R-125, R-143a, and R-134a. For example, R-410A is 50% (R-32) and 50% R-125. Whereas, R-407C is 23% (R-32), 25% (R-125) and 52% (R-134a). 2
R-32 is a next-generation refrigerant that provides HVAC engineers the tools they need to design systems for low total cost of ownership: the low cost of the refrigerant per pound, coupled with the potential for lower charge size and easy handling for recharging when compared to non-azeotropic blends, can yield impressive savings. EPA SNAP Program.
The document summarizes the benefits of using R-32 refrigerant compared to other refrigerants. It notes that R-32 contributes to reducing ozone depletion and global warming potential, has lower risk and better availability, and provides better efficiency with less refrigerant volume.
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R32 in a system leads to changes in the lubricant oil as well as in the compressor and refrigeration system design. Several ways exist to manage the high discharge temperature in the compressors operating with R32. Vapour injection can be used to increase system capacity and performance. It also has the function to decrease discharge temperature.
