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ALTERNATIVES FOR OZONE-DEPLETING REFRIGERANTS
Citation:
Smith, N. AND K. Ratanaphruks. ALTERNATIVES FOR OZONE-DEPLETING REFRIGERANTS. U.S. Environmental Protection Agency, Washington, D.C., EPA/600/A-94/117.
Description:
The paper gives results of tests of 2 of 11 compounds and several mixtures selected for intensive evaluation from about 40 new synthesized compounds that may serve as environmentally safe and effective refrigerant alternatives over the long term. he two compounds are: 1, 1, 1, 2, 3, 3-hexafluoropropane (HFC-236ea), a potential alternative for CFC-114; and 1, 1, 2, 2, 3-pentafluoro-propane (HFC-245ca), a potential alternative for CFC-11. hese two compounds have zero ozone depletion potential, low global warming potential, and thermophysical properties closely matching those of the chlorofluorocarbons (CFCS) they may replace. imited toxicity tests to date reveal no adverse toxic effects. lammability tests of HFC-236ea and HFC-245ca show the former to be nonflammable and the latter to be marginally flammable depending on humidity and ignition source energy. oth compounds have been shown to be thermally and hydrolytically stable, miscible with the new polyester lubricants, and compatible with numerous construction materials commonly used in refrigeration.