Experimental investigation on the inhibition of flame retardants on the flammability of R1234ze(E)
Experimental investigation on the inhibition of flame retardants on the flammability of R1234ze(E)
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DOI：
10.1016/j.energy.2022.126149
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发表时间：
2022-11
期刊：
影响因子：
9
通讯作者：
Zhen Zhao;Jielin Luo;D. Zou;Kaiyin Yang;Qin Wang;Guangming Chen
中科院分区：
文献类型：
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作者：
Zhen Zhao;Jielin Luo;D. Zou;Kaiyin Yang;Qin Wang;Guangming Chen
由于对环境友好，R1234ze(E)被认为是替代制冷剂，但其可燃性限制了其使用和推广。为了降低可燃风险，可以对不可燃制冷剂进行混合，但对混合可燃性的研究较少。本文在23℃、50%相对湿度条件下，实验研究了3种典型制冷剂R744、R1336mzz(E)和R1233zd(E)对R1234ze(E)可燃性的抑制作用。测定了3种阻燃剂在不同浓度下的可燃极限，确定了3种阻燃剂的临界抑制浓度分别为0.41、0.2和0.4，得到了3种阻燃剂可燃极限的拟合方程参数。从物理和化学两方面简要分析了其抑制机理，并对典型的火焰传播现象进行了对比分析。建立了三元共混物临界抑制浓度估算模型。得到了三元共混物R744/R1234ze(E)/R1336mzz(E)和R744/R1234ze(E)/R1233zd(E)的临界抑制线，初步确定了两种三元共混物的不燃区。该研究结果为之前在可燃浓度下使用R744/R1234ze(E)的研究提供了补充，并将有助于R1234ze(E)及其混合物在科学研究和工业应用中的安全性。
Owing to environmental friendliness, R1234ze(E) is considered as an alternative refrigerant, but the flammability restricts its use and promotion. To reduce the combustible risk, nonflammable refrigerants can be blended, while there is a lack of research on mixture flammability. In this paper, the inhibition effects of three typical refrigerants R744, R1336mzz(E) and R1233zd(E) on the flammability of R1234ze(E) were experimentally investigated under the condition of 23 °C and 50% relative humidity. The flammable limits at different concentrations were measured and the critical suppression concentrations of the three retardants were determined as 0.41, 0.2 and 0.4 respectively, by which the parameters of fitting equations to their flammable limits were obtained. The inhibition mechanisms were briefly analyzed in terms of both physical and chemical effects, and typical flame propagation phenomena were compared with further analyses. A model for estimating critical suppression concentrations of ternary blends was established. The critical suppression lines of ternary blends R744/R1234ze(E)/R1336mzz(E) and R744/R1234ze(E)/R1233zd(E) were obtained, by which the nonflammable zones of the two ternary blends were preliminarily determined. The results have provided complements for previous studies using R744/R1234ze(E) at flammable concentrations and will contribute to utilize R1234ze(E) and its blends in safety for both scientific researches and industrial applications.