A numerical investigation of preheated diluted oxidizer influence on NOx emission of biogas flameless combustion using Taguchi approach
A numerical investigation of preheated diluted oxidizer influence on NOx emission of biogas flameless combustion using Taguchi approach
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DOI：
10.1016/j.fuel.2018.04.049
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发表时间：
2018-09
期刊：
影响因子：
7.4
通讯作者：
Mina Mehregan;M. Moghiman
中科院分区：
文献类型：
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作者：
Mina Mehregan;M. Moghiman
分析了预热稀释氧化剂参数对沼气无焰燃烧器NOx排放的影响。设计参数和水平为稀释组分、N2和CO2、氧气浓度为5%、7%和10%以及预热空气温度为900、1100和1300 K。采用L18（2132）田口正交表设计数值模拟的测试方案。结果表明，氧气浓度的增加导致更多的NOx排放。提高预热空气温度也可得到同样的结果。与CO2稀释法相比，N2稀释法降低NOx排放的效果更好。方差分析表明，对NOx排放影响最大的设计因素是氧气浓度和预热空气温度，分别贡献了57%和32%左右，表明通过控制这些参数可以有效地提高NOx排放。
The present investigation submits an analysis about the influence of preheated diluted oxidizer parameters on NOxemissions from a biogas flameless burner. The design parameters and their levels were diluting species, N2and CO2, oxygen concentration of 5, 7 and 10% and preheated air temperature at 900, 1100 and 1300 K. An L18(2132) Taguchi orthogonal array was employed to design the test plan for numerical simulations. The results reveal that an increase in oxygen concentration leads to more NOxemissions. The same result is obtained by increasing preheated air temperature. Also, air dilution with N2gives better result for reducing NOxemission compared to CO2dilution method. As well as, according to the ANOVA (analysis of variance), the most effective design factors on NOxemission are oxygen concentration and then preheated air temperature with around 57% and 32% contribution, respectively, which indicates NOxemission can be successfully enhanced by controlling these parameters.