新型制冷剂R227ea/R161爆炸性实验研究

EXPERIMENTAL STUDY OF THE EXPLOSION LIMITS OF THE NEW REFRIGERANT R227ea/R161

由于以一定配比下的R227ea与R161所组成的混合制冷剂具有替代R407C的潜力。因此本文对R227ea与R161在六种配比为0.75:1、1:1、1.5:1、2:1、2.5:1、3:1下的爆炸性进行了实验研究,得到了爆炸极限曲线及爆炸范围,即混合气的爆炸上限均在19%以下,临界抑爆体积分数比15.79%,爆炸浓度范围较小。但在R227ea的体积分数较小时,混合气在爆炸极限内的爆炸现象十分强烈。因此考虑到安全问题,R227ea在新型混合制冷剂中的含量不宜过低,最好体积比大于1。

The mixture refrigerant R227ea/R161 at the certain ratio has a potential as an alternative refrigerant of R407C. In this paper, the explosive experimental of the mixture refrigerant R227ea/R161 in six ratio （0.75：1, 1：1, 1.5：1, 2：1, 2.5：1, 3：1） was studied, and we got the explosion limit curve and the scope of explosions. The explosion upper limit of the mixture is below 19%, and the critical explosion suppression volume is 15.79%, so the concentration of explosions is smaller. However, when the volume fraction of HFC-227ea is smaller, mixed-gas explosion in the explosion limit is very strong. So the content of R227ea in the new mixed refrigerant should not be too low, the volume Ratio should be greater than 1 from safety.