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Study on the effect of different factors over the explosion range for new alternative refrigerants HFC-32.

[In Chinese. / En chinois.]

Author(s) : WANG Y., JIN J., XIONG Z., et al.

Type of article: Article

Summary

The influences of temperature, relative humidity and fire-retardant on the explosion range of new alternative refrigerants HFC-32 were investigated through an experiment bed for the explosion range of flammable gases. The results indicated at the enhancement of temperature can improve the upper explosion range of HFC-32 and decrease its lower explosion range, then enlarges explosion range of HFC-32 under the temperature of -5 ~55°C. The improvement of relative humidity makes the lower explosion range of HFC-32 slightly increase, and the upper explosion range slightly decrease at the relative humidity range of less than 60% for HFC-32. When the relative humidity increases from 60% to 87% , the upper explosion range of HFC-32 decreases rapidly to make the explosive range of HFC-32 disappear. The addition of CF3I or HFC-134a fire-retardant can lead the explosion range of HFC-32 to reduce, and the effect of CF3I on the inflaming retarding of HFC-32 is superior to HFC-134a. When the volume ratio of CF3I/HFC-32 increases from 0 to 1 or HFC-134a/HFC-32 increases from 0 to 10, their explosion ranges disappear. This provides an important theoretical basis for inhibiting the combustion of HFC-32.

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Pages: 6-9

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