基于TDLAS技术测量高温环境中CO_2的温度和浓度
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摘要
基于可调谐半导体激光吸收光谱(TDLAS)技术,研究了高温环境中CO2温度和浓度的测量方法。选取位于4996cm-1附近的CO2吸收谱线作为高温环境中对CO2温度和浓度进行测量的目标谱线对。对气体吸收池内不同温度(873~1273K)、不同CO2体积分数(4%~10%)的CO2/N2混合气体的温度以及CO2的浓度进行了在线测量。结果表明:测量温度与设定温度的平均偏差为2.07%,峰值偏差为3.49%;测量得到的CO2浓度与配比浓度的平均偏差为2.25%,峰值偏差为4.75%。该测量方法精确可靠,为高温环境中CO2的测量提供了一种新的技术手段。
Based on tunable diode laser absorption spectroscopy technique,the measurement method of CO2 temperature and concentration in high temperature environment is studied.The CO2 absorption line near 4996 cm-1 is selected as the target detection line to measure CO2 temperature and concentration in high temperature environment.The CO2 concentration and temperature of CO2/N2 mixed gas in the gas absorption cell at different temperatures(873-1273 K)and different CO2 volume fraction(4%-10%)are measured.The results show that,compared with the setting values,the average deviation and peak deviation of the measured temperature are 2.07%and 3.49%,respectively.The average deviation and peak deviation of the measured concentration are 2.25% and4.75%,respectively.The results indicate that the proposed method is accurate,and it provides references for CO2 detection in the high temperature environment.
Based on tunable diode laser absorption spectroscopy technique,the measurement method of CO2 temperature and concentration in high temperature environment is studied.The CO2 absorption line near 4996 cm-1 is selected as the target detection line to measure CO2 temperature and concentration in high temperature environment.The CO2 concentration and temperature of CO2/N2 mixed gas in the gas absorption cell at different temperatures(873-1273 K)and different CO2 volume fraction(4%-10%)are measured.The results show that,compared with the setting values,the average deviation and peak deviation of the measured temperature are 2.07%and 3.49%,respectively.The average deviation and peak deviation of the measured concentration are 2.25% and4.75%,respectively.The results indicate that the proposed method is accurate,and it provides references for CO2 detection in the high temperature environment.
引文
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[3]Hughes T P,Baird A H,Bellwood D R,et al.Climate change,human impacts,and the resilience of coral reefs[J].Science,2003,301(5635):929-933.
[4]Spearrin R M,Goldenstein C S,Jeffries J B,et al.Fiber-coupled 2.7μm laser absorption sensor for CO2in harsh combustion environments[J].Measurement Science and Technology,2013,24(5):055107.
[5]Larcher G,Landsheere X,Schwell M,et al.Spectral shape parameters of pure CO2,transitions near 1.6μm by tunable diode laser spectroscopy[J].Journal of Quantitative Spectroscopy and Radiative Transfer,2015,164:82-88.
[6]Li N,Yan J H,Wang F,et al.Temperature measurement of CO2 gas VCSEL diode laser at1.58μm[J].Journal of Combustion Science&Technology,2008,14(5):458-462.李宁,严建华,王飞,等.利用VCSEL激光二极管在1.58μm波段对CO2气体温度的测量[J].燃烧科学与技术,2008,14(5):458-462.
[7]Webber M E,Kim S,Sanders S T,et al.In situ combustion measurements of CO2 by use of a distributed-feedback diode-laser sensor near 2.0μm[J].Applied Optics,2001,40(6):821-828.
[8]Farooq A,Jeffries J B,Hanson R K.Sensitive detection of temperature behind reflected shock waves using wavelength modulation spectroscopy of CO2near 2.7μm[J].Applied Physics B,2009,96(1):161-173.
[9]Farooq A,Jeffries J B,Hanson R K.CO2concentration and temperature sensor for combustion gases using diode-laser absorption near 2.7μm[J].Applied Physics B,2008,90(3/4):619-628.
[10]Wu K,Li F,Cheng X,et al.Sensitive detection of CO2 concentration and temperature for hot gases using quantum-cascade laser absorption spectroscopy near 4.2μm[J].Applied Physics B,2014,117(2):659-666.
[11]Gordon I E,Rothman L S,Hill C,et al.The HITRAN 2016 molecular spectroscopic database[J].Journal of Quantitative Spectroscopy&Radiative Transfer,2017,203:3-69.
[12]Shang Y,Wei Y B,Wang C,et al.Two gas concentration on-line monitoring based on absorption spectra[J].Chinese Journal of Lasers,2010,37(s1):248-251.尚盈,魏玉宾,王昌,等.基于吸收光谱技术的两种气体浓度的在线检测[J].中国激光,2010,37(s1):248-251.
[13]Yuan S,Kan R F,He Y B,et al.Tunable diode laser spectroscopy system for carbon dioxide monitoring[J].Chinese Journal of Lasers,2014,41(12):1208003.袁松,阚瑞峰,何亚柏,等.基于可调谐半导体激光光谱大气CO2监测仪[J].中国激光,2014,41(12):1208003.