• Aleksandar Saljnikov, Faculty of Mechanical Engineering, University of Belgrade, Serbia
  • Biljana Vučićević, Laboratory for Thermal Engineering and Energy, Vinča Institute of Nuclear Sciences, Serbia
  • Đorđe Kozić, Faculty of Mechanical Engineering, University of Belgrade, Serbia
  • Žarko M. Stevanović, Laboratory for Thermal Engineering and Energy, Vinča Institute of Nuclear Sciences, Serbia
  • Kosta Maglić, Laboratory for Thermal Engineering and Energy, Vinča Institute of Nuclear Sciences, Serbia
  • Predrag M Radovanović, Faculty of Mechanical Engineering, University of Belgrade, Serbia

Research on emittance spectra of deposits from solid fossil fuel combustion in wide range use furnaces

  • This paper describes research on thermal radiation characteristics of ash deposits created as a result of solid fossil fuel combustion in wide range use furnaces. Measurements yielded spectra of normal emittance in the 2.5-25 mm wave length range and total normal emittance values of milimeter order thick samples of four ash types in the 600-1100 K temperature range during heating and cooling. It was concluded that deposit powder layers are opaque to infrared radiation. Spectral emittance in creases with growth of radiation wave length and ash temperature. Influence of chemical composition of the ashes upon spectral emittance is not pronounced. Total emittance decreases with temperature in crease. Deposit layers get sintered and fused at temperatures above 1000 K, the emittance of the sintered layer remaining above the emittance of the unsintered layer. One type of ash layer becomes semi-transparent upon sintering. Obtained results have been summed up from the thermal engineering aspect and a method is proposed for their correlating and utilizing within the model for simulation of solid fossil fuel combustion in wide range use furnaces.
  • Keywords
    thermal radiation, spectroscopical measurement, emittance, ash deposits, combustion
  • Pages
    3 - 16
  • UDC
    662.613.11:681.785.4
  • BIBLID
    0350-218X, 29 (2003), 1-4, 3-16
  • References
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