Addressing HFCs Under the Montreal Protocol and Indo-US Task Force on HFCs
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The document discusses addressing HFCs under the Montreal Protocol and the Indo-U.S. Task Force on HFCs. It notes the projected growth of HFCs as replacements for ozone depleting substances and highlights alternatives that are available now or in development. It outlines the North American proposal to phase down HFCs and control HFC-23 byproduct emissions, which could potentially reduce greenhouse gas emissions by over 87,000 million metric tons by 2050. An Indo-U.S. workshop was held to discuss transitioning away from HCFCs in key sectors to lower global warming potential alternatives.
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Addressing HFCs Under the Montreal Protocol and Indo-US Task Force on HFCs
- 5. Relationship between ODS and Other Greenhouse Gases Ozone Depleting Substances (Halogen Gases) Greenhouse Gases CFCs Halons HFCs HCFCs HFC-23 HFC-134a HFC-125 CO 2 CH 4 SF 6 PFCs N 2 O CFC-113 CFC-12 CFC-11 H-1211 H-1301 Carbon Tetrachloride (CCl 4 ) Methyl Chloride (CH 3 Cl) Methyl Bromide (CH 3 Br) Methyl Chloroform (CH 3 CCl 3 )
- 13. Trilateral Proposal Phasedown Schedule
- 16. consumption reductions emission reductions emissions North American Proposal Benefits MMTCO 2 eq
Notas del editor
- Replace HFC-134a with HFO-1234yf in MVAC, isobutane in household refrigerators and freezers, and propane in retail refrigerators and freezers. Numbers are per year at some date in future – not meant to be cumulative….numbers would increase as market increases Assume a transition over time from HFC-134a (GWP of 1430) to: - HFO-1234yf, with same charge size as for 134a and GWP=4 (MVAC) (assume consistent with F-gas rule so 2011-2017 timeframe) isobutane, with reduced charge size of 50 g (compared to 125 g for HFC-134a), and GWP=8 (Household refrigerators/freezers) propane, with reduced charge size of 90 g (compared to 220 g for HFC-134a), and GWP=3 (Commercial freezers) Background: European directive restricts future use of high-GWP refrigerants in car A/C systems Current HFC phaseout in EU from 2011-2017 U.S. car manufacturers examining options, including CO 2 Moving to low-GWP alternatives: a positive step for climate Action: Allow safe use of CO 2 refrigerant as option for new car A/C systems Final rule at OMB since 2007 Annual climate benefits: 14 MMTCO 2 E emissions avoided