Char particle emissivity of two coal chars in oxy-fuel atmospheres
作者： P. Graeser , M. Schiemann
DOI: 10.1016/J.FUEL.2016.06.116
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摘要: Abstract A newly designed experimental setup for the “in-flight” measurement of emissivity burning char particles in spectral range from 1.25 μm to 5.5 μm is presented. Single coal (Colombian bituminous and Rhenish lignite) were burned a flat flame burner under oxy-fuel conditions. As region 850 nm 2.5 μm dominant radiative heat flux at temperatures typical pulverized fuel combustion, measured spectrally resolved this by fiber spectrometer. Additionally total 2.4 μm an InSb-detector. particle temperature diameter are necessary determination emissivity, two-color pyrometry with simultaneous size was carried out visible wave length range. There differences between emissivities both chars. These initial results represent first measurements combustion
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