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新型替代制冷剂HFC-32爆炸极限影响因素研究
王永贞1, 金晶1,2, 熊志波1, 孟磊1, 郭明山1
0
(1.上海理工大学能源与动力工程学院;2.上海理工大学协同创新研究院)
摘要:
利用可燃性气体爆炸极限测定实验台考察了温度、相对湿度、阻燃剂对HFC-32爆炸极限的影响。研究结果表明:在﹣5~55 ℃区间之内,升高温度会促使HFC-32爆炸上限逐渐增大,其爆炸下限逐渐减少,拓宽了HFC-32的爆炸区间;当相对湿度低于60%时,增大相对湿度会导致HFC-32爆炸下限稍微增大,其爆炸上限稍微减少,当相对湿度由60%逐渐增至87%时,其爆炸上限急剧减少,直至爆炸极限范围消失;添加CF3I或HFC-134a阻燃剂可促使HFC-32爆炸极限范围减少,但CF3I的阻燃效果优于HFC-134a,当CF3I/HFC-32体积比由0增至1或HFC-134a/HFC-32体积比由0增至10时,两种混合气的爆炸范围最终都减少为0。这为抑制HFC-32燃烧提供了重要的理论依据。
关键词:  替代制冷剂  爆炸极限  实验研究  HFC-32
DOI:10.3969/j.issn.0253-4339.2015.06.006
    
基金项目:国家科技支撑计划(2015BAA04B03)资助项目。
Study on the Effect of Different Factors over the Explosion Range for New Alternative Refrigerants HFC-32
Wang Yongzhen1, Jin Jing1,2, Xiong Zhibo1, Meng Lei1, Guo Mingshan1
(1.School of Energy and Power Engineering, University of Shanghai for Science and Technology;2.Collaborative Innovation Research Institute, University of Shanghai for Science and Technology)
Abstract:
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 that the enhancement of temperature can improve the upper explosion range of HFC-32 and decrease its lower explosion range, then enlarges the explosion range of HFC-32 under the temperature of﹣5~55 ℃. 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.
Key words:  alternative refrigerant  explosion range  experimental study  HFC-32

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