Nonintrusive determination of combustion efficiency using FTIR spectroscopy

J. S. Lindner; Zhang Hansheng; R. L. Cook

doi:10.1117/12.210803

31 May 1995 Nonintrusive determination of combustion efficiency using FTIR spectroscopy

J. S. Lindner, Zhang Hansheng, R. L. Cook

Proceedings Volume 2365, Optical Sensing for Environmental and Process Monitoring; (1995) https://doi.org/10.1117/12.210803
Event: Optical Sensing for Environmental and Process Monitoring, 1994, McLean, VA, United States

Abstract

The combustion stoichiometry or air to fuel ratio is a critical operating parameter in many processes. The stoichiometry and thus the combustion efficiency dictates the plant economics as well as the environmental impact. In this work the technique of Fourier transform infrared spectroscopy has been evaluated as a nonintrusive probe of CO and CO₂ concentrations, average line of sight temperatures and temperature profiles on a 500 Kw oil-fired combustion test facility. Results have been compared with facility temperatures and concentrations calculated from an equilibrium chemistry model. Both FTIR emission and absorption configurations were evaluated thereby allowing conclusions as to the potential of these techniques for large scale facility diagnostics. CO₂ concentrations and profile temperatures were observed to agree well with the facility measurements and chemistry calculations. CO concentrations were observed to be in poor agreement with the calculations. This result is believed to arise from incomplete mixing in the test facility burner although other facility effects cannot be ruled out. The presence of CO in the spectra at an air to fuel ratio of 1.05 indicated that the FTIR methods can be used to diagnose burner operation.

Citation Download Citation

J. S. Lindner, Zhang Hansheng, and R. L. Cook "Nonintrusive determination of combustion efficiency using FTIR spectroscopy", Proc. SPIE 2365, Optical Sensing for Environmental and Process Monitoring, (31 May 1995); https://doi.org/10.1117/12.210803

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