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Applied Optics

Applied Optics


  • Editor: James C. Wyant
  • Vol. 47, Iss. 29 — Oct. 10, 2008
  • pp: 5541–5549

Photodiode-based sensor for flame sensing and combustion-process monitoring

Luis Arias, Sergio Torres, Daniel Sbarbaro, and Oscar Farias  »View Author Affiliations

Applied Optics, Vol. 47, Issue 29, pp. 5541-5549 (2008)

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A nonintrusive low-cost sensor based on silicon photodiode detectors has been designed to analyze the formation and behavior of excited CH * and C 2 * radicals in the combustion process by sensing the spectral emission of hydrocarbon flames. The sensor was validated by performing two sets of experiments for both nonconfined and confined flames. For a nonconfined oil flame, the sensor responses for the axial intensity were highly correlated with the measurements obtained with a radiometer. For confined gas flames the ratio between the signal corresponding to C 2 * and CH * was successfully correlated with the CO pollutant emissions and the combustion efficiency. These results give additional insight on how to prevent an incomplete combustion using spectral information. The fast response, the nonintrusive character, and the instantaneous measurement of the needed spectral information makes the proposed optical sensor a key element in the development of advanced control strategies for combustion processes.

© 2008 Optical Society of America

OCIS Codes
(040.1240) Detectors : Arrays
(040.1880) Detectors : Detection
(120.1740) Instrumentation, measurement, and metrology : Combustion diagnostics
(300.2140) Spectroscopy : Emission
(300.6170) Spectroscopy : Spectra
(250.0040) Optoelectronics : Detectors

ToC Category:

Original Manuscript: May 13, 2008
Revised Manuscript: August 7, 2008
Manuscript Accepted: September 5, 2008
Published: October 9, 2008

Luis Arias, Sergio Torres, Daniel Sbarbaro, and Oscar Farias, "Photodiode-based sensor for flame sensing and combustion-process monitoring," Appl. Opt. 47, 5541-5549 (2008)

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