Use CO2 To Cool Refrigerators

Tomorrow's commercial refrigeration systems, such as those in supermarkets, could be cooled by carbon dioxide instead of hydrofluorocarbons. Hydrofluorocarbons are a greenhouse gas that is nearly 4,000 times more potent than CO2 and a future with less of them could be important because millions of pounds of HFCs leak into the environment every year, said Brian Fricke, a researcher in Oak Ridge National Laboratory's Building Equipment Research Group. To address the problem, Fricke and colleagues are experimenting with CO2 and other refrigerants, including a hydrofluoroolefin called R1234yf. read more

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