438-不同门开度对室内R32浓度分布影响的研究.pdfVIP

不同门开度对室内R32 浓度分布影响的研究 1 2 （天津商业大学金梧凤 靖佳俊 陈丽锦 袁小勇 王厚林 雒家彬 郑绚 徐玉状） 摘 要：制冷剂R32 的可燃性限制了其大范围推广的可能性，故有必要对其泄漏后的浓 度分布进行研究。本课题利用实验的方法，研究了泄漏口位于墙中时，门窗紧闭，门开度为 30°两种工况下室内0.2m，1.2m，2.2m 三个平面上的制冷剂R32 的浓度分布。门窗紧闭时， 0.2m，1.2m平面制冷剂浓度均在可燃区间14.4%—31%内，2.2m 平面R32 浓度没有达到可燃 下限。门开度为 30°时，各平面浓度未达到可燃下限，室内较为安全。结果表明：门开度 为 30°的工况下，有效地降低了各平面R32 的浓度，减少了室内发生燃烧爆炸事故的可能 性。 关键词：R32;泄漏位置;浓度分布;可燃性 Study on the concentration distribution of door opening degree of indoor R32 （Tianjin University of Commerce ，Jin Wufeng1 ，Jing Jiajun2 ，Chen Lijin Yuan xiaoyong ，Wang Houlin ，Luo Jiabin ，Zheng Xuan ，Xu Yuzhuang ，） Abstract: The flammability of the substitute refrigerant R32 limits its possibility of wide extension, it is necessary to study the concentration distribution. In this paper, the concentration distribution of the refrigerant R32 in the indoor 0.2m, 1.2m, 2.2m is studied by means of the experimental method, when the leaking position is on the wall, the door and the window is closed and the door opening is 30°. Under the condition of closed the door and window, the concentration of 0.2m,1.2m plane refrigerant is in the combustible interval 14.4%-31%, and the 2.2m plane R32 concentration is not up to the combustible limit. When the door opening degree is 30 °, the concentration distribution does not reach the lower flammable limit. There is no lower flammable time and flammable interval maintenance time and the room is relatively safe. The results show that the R32 concentration of each plane is reduced effectively under the condition of 30 ° door opening, and the possibility of combustion explosion accident in the room is reduced. Keywords ：R32 ; Leak location ; Concentration distribution ;Combustible 0 引言 常见制冷剂如CFCS(氯氟烃)及HCFCS(氢氯氟烃), 由于其对大气层产生破坏作用，此类 制冷剂正逐步被淘汰。为解决制冷剂替代难题，国内外学者寻找了多种解决方案。如一些天 1金梧凤（1964- ），男，副教授，博士。研究方向