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  • flammability limits of refrigerant mixtures with 1,1,2,2-tetrafluoroethane

    جزئیات بیشتر مقاله
    • تاریخ ارائه: 1392/07/24
    • تاریخ انتشار در تی پی بین: 1392/07/24
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     extensive measurements have been made on the flammability limits of two binary mixtures of propane/1,1,2,2-tetrafluoroethane and 1,1-difluoroethane/1,1,2,2-tetrafluoroethane as per the chinese national standard gb/t 12474-90. experimental data for the 1,1,2,2-tetrafluoroethane mixtures were obtained with estimated uncertainties of 0.09 mol% for lower flammability limits and 0.14 mol% for upper flammability limits. all measurements were carried out at atmospheric pressure and room temperatures around 20 °c. it has been found that molar fractions of propane and 1,1-difluoroethane in lower limit mixture decrease when 1,1,2,2-tetrafluoroethane, being itself nonflammable, is added to the mixture. modification was made to the extended le chatelier’s formula for interpreting the dilution effect of 1,1,2,2-tetrafluoroethane. it has been found that the extended le chatelier’s formula using an individual set of parameters can fit the experimental results for flammability limits of propane and 1,1-difluoroethane diluted with 1,1,2,2-tetrafluoroethane well.

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