Temperature Measurement of Carbon Dioxide Using Fixed-Wavelength Absorption Spectroscopy Technique

Yaqi Zhang; Fei Wang; Haibin Cui

doi:10.3788/LOP56.193001

Laser & Optoelectronics Progress, Volume. 56, Issue 19, 193001(2019)

Temperature Measurement of Carbon Dioxide Using Fixed-Wavelength Absorption Spectroscopy Technique

Yaqi Zhang, Fei Wang^*, and Haibin Cui

State Key Laboratory of Clean Energy Utilization, College of Energy Engineering, Zhejiang University, Hangzhou, Zhejiang 310027, China

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Fig. 1. Diagram of temperature measurement by two-line ratio method

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Fig. 2. Diagram of signal acquired using fixed-wavelength absorption spectroscopy

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Fig. 3. Line intensity ratio and its sensitivity to temperature

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Fig. 4. Peaks of lineshape function and their ratios

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Fig. 5. Simulated absorption spectrum peak ratio and relative error. (a) Absorption spectrum peak ratio; (b) relative error

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Fig. 6. Diagram of temperature measurement system

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Fig. 7. Comparison between experimental measurement temperature and set temperature

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Fig. 8. Absolute relative errors obtained by fixed-wavelength method and scanning-wavelength method

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Table 1. CO2 spectral absorption-line parameters
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Table 1. CO2 spectral absorption-line parameters
No. Wavenumber /cm^-1 Line-intensity /(10^-4 cm^-2) E″ /cm^-1 γ_air /cm^-1 γ_self /cm^-1 n_air
1 4997.805 4.36 1745 0.0668 0.072 0.72
2 4997.811 0.40 3668 0.0625 0.065 0.66
3 4996.106 34.23 274 0.0697 0.094 0.74

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Yaqi Zhang, Fei Wang, Haibin Cui. Temperature Measurement of Carbon Dioxide Using Fixed-Wavelength Absorption Spectroscopy Technique[J]. Laser & Optoelectronics Progress, 2019, 56(19): 193001

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