制冷剂R290及其混合物燃爆特性与安全性研究

将具有燃爆性制冷剂R290（丙烷）分别与物理抑制剂CO2和化学抑制剂R13I1（三氟碘甲烷）混合，根据混合制冷剂的热物性参数确定R290的占比。实验结果表明：R13I1与R290组成的混合工质可直接替代传统制冷剂，根据所要替代的现有制冷剂的热物性参数可确定配比。用可燃气体/蒸气爆炸试验测试装置测试R290分别与CO2和R13I1混合后的爆炸参数，实验得出CO2和R13I1环境下，二者的体积分数分别为26.5%和6.42%时，R290不再具有燃爆性。同时，针对R290，推导出化学抑制剂最小惰化浓度的预测理论公式。

Study on the explosion characteristics and safety of refrigerant R290 and its mixture

The proportion range of R290（Propane）was determined according to the thermophysical parameters after mixing with physical inhibitor CO2 and chemical inhibitor R13I1（iodotrifluoromethane）. The experimental results showed that the mixture of R13I1 and R290 have the capacity to replace the traditional refrigerant, and the ratio could be determined by the thermophysical parameters of the existing refrigerant to be replaced. The explosion parameters of R290 mixed with CO2 and R13I1 were measured by combustible gas / vapor explosion test device. According to the experimental result, when the volume fraction of CO2 and R13I1 to R290 were 26.5% and 6.42% respectively, R290 was no longer explosive. At the same time, for R290, the theoretical formula for predicting the minimum inert concentration of chemical inhibitors was derived.