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http://dx.doi.org/10.7842/kigas.2020.24.5.29

An Empirical Study on Real-Time Temperature and Concentration Measurement Through Optical Absorption Characteristic Analysis of Gas in a Large Combustion System  

Park, Jiyeon (Thermochemical Energy System R&D Group, Korea Institute of Industrial Technology)
So, Sunghyun (Thermochemical Energy System R&D Group, Korea Institute of Industrial Technology)
Park, Daeguen (Thermochemical Energy System R&D Group, Korea Institute of Industrial Technology)
Ryu, Changkook (Dept. of Mechanical Engineering, Sungkyunkwan University)
Lee, Changyeop (Thermochemical Energy System R&D Group, Korea Institute of Industrial Technology)
Yoo, Miyeon (Thermochemical Energy System R&D Group, Korea Institute of Industrial Technology)
Publication Information
Journal of the Korean Institute of Gas / v.24, no.5, 2020 , pp. 29-38 More about this Journal
Abstract
It is practically difficult to accurately measure the temperature and concentration of a large combustion systems at industrial sites in real time. Temperature measurement using thermocouple, which are mainly used, is a point-measuring method that is less accurate and less reliable to analyze the wide area range of inner combustion system, and has limitations to internal accessibility. In terms of concentration analysis, most measurement methods use sampling method, which are limited by the difficulty of real-time measurement. As a way to overcome these limitations, laser-based measurement methods have been developed continuously. Laser-based measurement are line-average measurement methods with high representation and precision, which are beneficial for the application of large combustion systems. In this study the temperature and concentration were measured in real time by water vapor and oxygen generated during combustion using Tunable Diode Laser Absorption Spectroscopy (TDLAS). The results showed that the average temperature inside the combustion system was 1330℃ and the mean oxygen concentration was 3.3 %, which showed similar tendency with plant monitoring data.
Keywords
tunable diode laser absorption spectroscopy(TDLAS); combustion system; water vapor; oxygen; temperature; gas concentration;
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