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Faculty of Physics, University of Belgrade , Belgrade , Serbia
Faculty of Physics, University of Belgrade , Belgrade , Serbia
Faculty of Physics, University of Belgrade , Belgrade , Serbia
Faculty of Physics, University of Belgrade , Belgrade , Serbia
This study introduces a novel, non-contact optical technique for solving a twodimensional, ill-posed problem in temperature tomography inside the firebox of a commercial coal power plant. For determining the 2D temperature distribution and attenuation coefficients, we utilized four optical probes positioned at the corners of the combustion chamber, coupled to identical spectrometers via optical fiber cables. Spectral radiances between 780 nm and 900 nm were measured using Aurora 4000 spectrometers for the simulation. The measurement and reconstruction setup are based on a spectroscopic approach, assuming gray body radiation from the medium. This method was validated using experimental data from a 1D case within the same commercial coal power plant. This new approach offers a simpler measurement process, where the lower spatial resolution is offset by enhanced spectral resolution, providing a simpler alternative to methods involving laser absorption spectroscopy and expensive multispectral or hyperspectral CCD cameras.
Temperature tomography, Non-contact optical technique, VIS-NIR spectroscopy, Ill-posed problem, Attenuation coefficient
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