Ozone Depleting Substances

The U.S. Navy is in the process of converting all its shipboard air-conditioning and refrigeration equipment to chlorofluorocarbon (CFC)-free systems. CFCs are ozone depleting substances that can damage the Earth’s atmosphere, as well as greenhouse gases that contribute to global warming. Although the hydroflourocarbon (HFC) refrigerants that replace the CFCs are also greenhouse gases, they have lower global warming potential than the CFCs they replaced and lower impact on the Earth’s climate. The converted HFC plants are also up to 15 percent more energy efficient than the older equipment.

The Navy converted all aircraft carriers to HFC systems as of April 2009, equivalent to eliminating 325 railcars of coal annually. Read an article about it here. The remainder of shipboard refrigeration plant conversions will be completed by 2018.