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Emissivity of burning bituminous coal char particles - Burnout effects

机译:燃烧烟煤炭颗粒的发射率-燃尽效应

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摘要

The investigation of burnout effects on the char particle emissivity in the spectral range from 1.25 to 5.5 mu m is presented. Single coal particles of a bituminous coal were combusted in a flat flame burner under oxy-fuel conditions (20.1 mol%). The emissivity was determined using a test-rig, which also measures particle temperature and diameter, both being necessary input parameters for single particle emissivity, in the visual spectral range. The infrared radiation was measured spectrally resolved with a fiber spectrometer (1.25-2.25 mu m) and integrated with an InSb detector (2.4-5.5 mu m). The emissivity decreases clearly with progressing burnout: E.g. at 1255 nm the emissivity decreases from 0.49 to 0.38. The effect is larger in the spectral range from 1.25 to 2.25 mu m, but still visible in the longer wave length range. (C) 2017 Elsevier Ltd. All rights reserved.
机译:在1.25至5.5μm的光谱范围内,研究了烧尽对炭颗粒发射率的影响。在平火焰燃烧器中,在含氧燃料条件下(20.1mol%)燃烧烟煤的单煤颗粒。发射率是使用测试设备确定的,该设备还可以在可见光谱范围内测量粒子温度和直径,这两个参数都是单个粒子发射率的必要输入参数。用纤维光谱仪(1.25-2.25μm)光谱分辨测量红外辐射,并与InSb检测器(2.4-5.5μm)集成。随着燃烧的进行,发射率明显降低:在1255 nm处,发射率从0.49降低至0.38。在1.25至2.25μm的光谱范围内效果更大,但在更长的波长范围内仍然可见。 (C)2017 Elsevier Ltd.保留所有权利。

著录项

  • 来源
    《Fuel》 |2017年第may15期|336-343|共8页
  • 作者

    Graeser P.; Schiemann M.;

  • 作者单位

    Ruhr Univ Bochum, Dept Energy Plant Technol, Bochum, Germany;

    Ruhr Univ Bochum, Dept Energy Plant Technol, Bochum, Germany;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Char emissivity; Burnout; Heat transfer; Oxy-fuel; Pulverized fuel;

    机译:焦炭辐射率;燃尽;传热;含氧燃料;粉状燃料;

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