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Proceedings Article

Remote quantification of smokestack effluent mass flow rates using imaging Fourier transform spectrometry

[+] Author Affiliations
Jacob L. Harley, Kevin C. Gross

Air Force Institute of Technology (USA)

Proc. SPIE 8018, Chemical, Biological, Radiological, Nuclear, and Explosives (CBRNE) Sensing XII, 801813 (June 03, 2011); doi:10.1117/12.883193
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From Conference Volume 8018

  • Chemical, Biological, Radiological, Nuclear, and Explosives (CBRNE) Sensing XII
  • Orlando, Florida, USA | April 25, 2011

abstract

A Telops Hyper-Cam midwave infrared (1.5 - 5.5μm) imaging Fourier-transform spectrometer (IFTS) was used to estimate industrial smokestack total effluent mass flow rates by combining spectrally-determined species concentrations with flow rates estimated via analysis of sequential images in the raw interferogram cube. Measurements of the coalburning smokestack were made with the IFTS at a stand-off distance of 350m. 185 hyperspectral datacubes were collected on a 128(W)×64(H) pixel sub-window (11.4×11.4cm2 per pixel) at a 0.5cm-1 spectral resolution. Strong emissions from H2O, CO2, CO, SO2, and NO were observed in the spectrum. A previously established single-layer radiative transfer model was used to estimate gas concentrations immediately above stack exit, and results compared reasonably with in situ measurements. A simple temporal cross-correlation analysis of sequential imagery enabled an estimation of the flow velocity at center stack. The estimated volumetric flow rate of 106±23m/s was within 4% of the reported value. Final effluent mass flow rates for CO2 and SO2 of 13.5±3.8kg/s and 71.3±19.3g/s were in good agreement with in situ rates of 11.6±0.1kg/s and 67.8±0.5g/s. NO was estimated at 16.1±4.2g/s, which did not compare well to the total NOx (NO +NO2) reported value of 11.2±0.2g/s. Unmonitored H2O, HCl , and CO were also estimated at 7.76±2.25kg/s, 7.40±2.00g/s, and 15.0±4.1 g/s respectively.

© (2011) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Citation

Jacob L. Harley and Kevin C. Gross
"Remote quantification of smokestack effluent mass flow rates using imaging Fourier transform spectrometry", Proc. SPIE 8018, Chemical, Biological, Radiological, Nuclear, and Explosives (CBRNE) Sensing XII, 801813 (June 03, 2011); doi:10.1117/12.883193; http://dx.doi.org/10.1117/12.883193


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