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Emissivity Characteristics of Hydrocarbon Flame and Temperature Measurement by Color Image Processing

Author

Listed:
  • Junyi Lin

    (College of humanities, Xiamen University, Xiamen 361005, China)

  • Xiangyu Zhang

    (Xi’an Thermal Power Research Institute Co., Ltd, Xi’an 710032, China)

  • Kaiyun Liu

    (College of humanities, Xiamen University, Xiamen 361005, China)

  • Wenjie Zhang

    (College of humanities, Xiamen University, Xiamen 361005, China)

Abstract

Non-gray radiation should be considered in the temperature and emissivity measurements of hydrocarbon flames. In this paper an improved ratio pyrometry by spectral analysis and color image processing is proposed. A Newton-type iterative method is utilized to analyze the spectrometer signals for the detection of monochromatic emissivity, and then the ratio pyrometry based on color image processing is corrected by the detected monochromatic emissivity without making approximations of the filter profiles of CCD camera. The experiments were conducted on a tubular heating furnace with coal gas and a propane flame. The spectral and spatial distributions of emissivity of hydrocarbon flame were detected, and the temperature measurement results at four conditions coincided with the thermocouple with relative errors less than 8.34%. The soot volume fractions in the turbulent diffusion hydrocarbon flame were approximately estimated from the detected emissivity, and are influenced by the O/C in the combustion. This study will provide a simple and effective method for the detection of non-gray radiation of hydrocarbon flames in the combustion industry.

Suggested Citation

  • Junyi Lin & Xiangyu Zhang & Kaiyun Liu & Wenjie Zhang, 2019. "Emissivity Characteristics of Hydrocarbon Flame and Temperature Measurement by Color Image Processing," Energies, MDPI, vol. 12(11), pages 1-14, June.
    • Handle: RePEc:gam:jeners:v:12:y:2019:i:11:p:2185-:d:238176
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    References listed on IDEAS

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    1. Weijie Yan & Yunqi Ya & Feng Du & Hao Shao & Peitao Zhao, 2017. "Spectrometer-Based Line-of-Sight Temperature Measurements during Alkali-Pulverized Coal Combustion in a Power Station Boiler," Energies, MDPI, vol. 10(9), pages 1-14, September.
    2. Weijie Yan & Dongmei Chen & Zuomei Yang & Enyu Yan & Peitao Zhao, 2017. "Measurement of Soot Volume Fraction and Temperature for Oxygen-Enriched Ethylene Combustion Based on Flame Image Processing," Energies, MDPI, vol. 10(6), pages 1-16, May.
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