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HCFC and HFC as Transition Refrigerants

Chlorofluorocarbons(CFCs) Elimination -Ozone depleting Potential (ODP) = 1. Alternatives:Hydrochlorofluorocarbons (HCFC)Hydrofluorocarbons (HFC). Most Common HCFCs. R 22 Chlorodifluoromethane ODP:0.055 R 123 2,2-Dichloro-1,1,1-trifluoroethane ODP:0.014R141b 1

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HCFC and HFC as Transition Refrigerants

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    1. HCFC and HFC as Transition Refrigerants Mr Y. Pathel, Divisional Environment Officer

    2. Chlorofluorocarbons(CFCs) Elimination -Ozone depleting Potential (ODP) = 1 Alternatives: Hydrochlorofluorocarbons (HCFC) Hydrofluorocarbons (HFC)

    3. Most Common HCFCs R 22 Chlorodifluoromethane ODP:0.055 R 123 2,2-Dichloro-1,1,1-trifluoroethane ODP:0.014 R141b 1,1-Dichloro-1-fluoroethane ODP:0.100 R142b 1-Chloro-1,1-difluoroethane ODP:0.050

    4. HFC R 134a 1,1,2,2-Tetrafluoroethane GWP 1300 R 152a 1,1-Difluoroethane GWP 140 R 23 trifluoromethane GWP 11700 R 32 Methylene fluoride GWP 650 R 125 Pentafluoroethane GWP 2800 R 143a 1,1,1-trifluoroethane GWP 3800

    5. HCFC are less stable than CFC in the lower atmosphere Lower ozone depleting potential High global warming potential HFC have no effect on the Ozone Layer but are potent Greenhouse gases.

    6. Blends 400 series : R 401a R22/152a/124 (53/13/34) R404a R125/143a/134a (44/52/4) R407c R32/125/134a (23/25/52) R410a R32/125 (50/50) 500 series: R 502 R22/115 (48.8/51.2) R507a R125/143a (50/50)

    7. Zeotropes (the 400 series) those where the boiling point of constituent compounds differs enough to lead to changes in relative concentration because of Fractional Distillation.The constituents have different boiling points

    8. Azeotropes (The 500 series) is a mixture of two or more liquids (chemicals) in such a ratio that its composition cannot be changed by simple distillation. This occurs because, when an azeotrope is boiled, the resulting vapor has the same ratio of constituents as the original mixture.

    9. WHY Transition refrigerants? HCFC to ensure complete recovery of the Ozone layer- Now expected by 2068. HFC to reduce Green house gas emissions. HFC may account to about 30% of Carbon equivalent by 2040 if left unchecked.

    10. Alternatives Should therefore be both Ozone Friendly and climate friendly

    11. Which? Hydrocarbons Ammonia Carbon Dioxide Sulphur Dioxide

    12. Refrigerants Naturally Partnership On an international basis we're working hard to bring about changes in refrigeration technology and find alternative, HFC-free refrigeration equipment. Together with the United Nations Environment Programme (UNEP), Greenpeace and McDonald's, The Coca-Cola Company has formed the 'Refrigerants Naturally' partnership to promote HFC-free refrigeration technology.

    13. Thank you

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