Research on the NO concentration of marine diesel emission by tunable diode laser absorption spectroscopy technique
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- 作者：Xiao-tao Yang ; yangxiaotao1985@163.com" class="auth_mail" title="E-mail the corresponding author ; Wen-qiang Xie ; Zhi-guo Yuan
- 关键词：Absorption spectroscopy ; Marine diesel ; NO ; Emission
- 刊名：Optik - International Journal for Light and Electron Optics
- 出版年：2016
- 出版时间：April 2016
- 年：2016
- 卷：127
- 期：8
- 页码：3788-3791
- 全文大小：870 K
文摘
This work investigates the feasibility of TDLAS technique in the NO concentration measurement for the marine diesel engine. A system in laboratory is devised for the NO steady state measurement. An ICL laser whose center wavelength is 5263 nm is chosen for the detection. With the direct detection method, a resolution about 2 ppm is realized, and the relative error is less than 5%. In contrast to the direct detection method, the harmonic detection method realizes a higher resolution, and the error is better less 3%. Considering with the temperature fluctuation of the diesel emission, the absorption line strength is calculated from 300 K to 500 K. At the same time, the intensity of the 2f signal is measured, which is proportional to the change of the line strength. So a modification can be imported easily to avoid the error produced by the temperature fluctuation. The TDLAS proposed in this work can realize a high precision, high resolution, and transient measurement for the marine diesel emission.