一种新型替代制冷剂爆炸极限的实验研究

Experimental study on explosion limits of a new alternative refrigerant

根据美国材料试验学会(ASTM)E681-01标准建立了爆炸极限实验装置,对实验原理及爆炸极限影响因素进行了分析.HFC-161/125/32的物性与HCFC-22相似,且环境性能良好,其臭氧消耗潜能(ODP)值为零,全球变暖潜能(GWP)值小于HCFC-22,可作为HCFC-22的替代制冷剂直接使用.测试了不同体积比的二元混合工质HFC-125/161和HFC-125/32的爆炸极限,并给出了作为HCFC-22替代制冷剂的三元混合物HFC-161/125/32的临界爆炸曲线图.结果表明,爆炸极限对保证可燃性制冷剂在生产和使用过程中的安全性有重要的作用.

An experimental apparatus for testing the explosion limits of flammable refrigerants was established following the standard of American Society for Testing Materials （ASTM） E681-01. Factors affecting the explosion limits of refrigerants were analyzed. Experimental results show that the physical characteristics of HFC-161/125/32 are similar to those of HCFC-22, its ozone depleting potential （ODP） is zero, and its global warming potential （GWP） is smaller than that of HCFC-22, therefore the new refrigerant HFC-161/125/32 can be considered as a promising alternative refrigerant to HCFC-22. The explosion limits of the flammable binary refrigerants of HFC-161/125/32 systems were tested. Based on the experimental data, the critical flammability line of the mixtures HFC-161/125/32 was plotted. Analysis result shows the importance of explosion limits to the safety of flammable refrigerants in manufacture and application.