R1216 对易燃制冷剂 R600a 的抑燃试验研究

R600a是一种具有低全球变暖潜值(global warming potential, GWP)的天然制冷剂，可替代部分氢氟烃(hydrofluorocarbons, HFCs)工质。但由于其易燃性，通常只用于充注量较小的制冷设备中。为改善R600a的安全性并拓宽其应用范围，文章将其与阻燃剂R1216混合，利用定容燃烧弹试验平台，研究R1216/R600a混合物在温度为$30^{\circ}\mathrm{C}$ 、初始压力为 $101.3\mathrm{kPa}$ 情况下的燃烧特性，包括可燃极限、无拉伸火焰速度、马克斯坦长度和层流燃烧速度等参数。结果表明，R1216对R600a的燃烧性有明显的抑制作用，且随着R1216与R600a体积比的增加，抑制效果更为显著。该研究结果为R1216/R600a混合物在制冷领域的安全应用提供参考。

R600a is a natural refrigerant with a low global warming potential (GWP) that can substitute some hydrofluorocarbons (HFCs). However, due to its flammability, it is typically employed in refrigeration equipment with a smaller refrigerant charge. To improve the safety of R600a and broaden its application range, this study blends it with flame retardant R1216. The combustion characteristics of R1216/R600a mixture under conditions of$30^{\circ}\mathrm{C}$ and 101. 3 kPa initial pressure were investigated using a constant volume combustion bomb. Parameters such as flammability limits, unstretched flame speed, Markstein length, and laminar burning velocity were investigated. The experimental results show that R1216 has a significant inhibitory effect on the combustion of R600a, and the inhibitory effect becomes more significant as the volume ratio of R1216 to R600a increases. The study results provide references for the safe application of R1216/R600a mixture in the refrigeration industry.