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Measurements of soot temperature and KL factor for spray combustion of biomass derived renewable fuels

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  • Jing, Wei
  • Wu, Zengyang
  • Zhang, Weibo
  • Fang, Tiegang

Abstract

Soot concentration (KL factor) and soot temperature were measured in a constant volume combustion chamber for a new biomass-based biofuel or BTL (biomass to liquid) fuel and regular No.2 diesel. A high-speed camera was employed coupled with two bandpass filters to implement a two-color thermometry method and measure the soot concentration and temperature simultaneously. Ambient conditions were set as follows: three temperatures of 800 K, 1000 K, and 1200 K and four O2 concentrations of 10%, 15%, 18% and 21%. The soot KL factor and temperature spatial distributions are presented for 1000 K ambient temperature. More soot is seen in the near-wall regions under the low ambient oxygen conditions while high level soot is observed in the upstream and midstream for the conventional combustion mode. An analysis was then conducted for the quasi-steady state. The results show that BTL combustion generates a lower integrated KL factor and soot temperature compared to diesel fuel under all the experimental conditions. Additionally, low ambient temperature with a moderate O2 concentration benefits BTL more than diesel due to a larger reduction in the integrated KL factor without increasing soot temperature significantly. Finally, the characteristics of the two-color results were further discussed and analyzed.

Suggested Citation

  • Jing, Wei & Wu, Zengyang & Zhang, Weibo & Fang, Tiegang, 2015. "Measurements of soot temperature and KL factor for spray combustion of biomass derived renewable fuels," Energy, Elsevier, vol. 91(C), pages 758-771.
    • Handle: RePEc:eee:energy:v:91:y:2015:i:c:p:758-771
    DOI: 10.1016/j.energy.2015.08.069
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    References listed on IDEAS

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    1. Zhang, Ji & Jing, Wei & Roberts, William L. & Fang, Tiegang, 2013. "Soot temperature and KL factor for biodiesel and diesel spray combustion in a constant volume combustion chamber," Applied Energy, Elsevier, vol. 107(C), pages 52-65.
    2. Han, Sangwook & Kim, Jaeheun & Bae, Choongsik, 2014. "Effect of air–fuel mixing quality on characteristics of conventional and low temperature diesel combustion," Applied Energy, Elsevier, vol. 119(C), pages 454-466.
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    1. Xiaoqing Zhang & Tie Li & Pengfei Ma & Bin Wang, 2017. "Spray Combustion Characteristics and Soot Emission Reduction of Hydrous Ethanol Diesel Emulsion Fuel Using Color-Ratio Pyrometry," Energies, MDPI, vol. 10(12), pages 1-13, December.
    2. Li, Xiangrong & Gao, Haobu & Zhao, Luming & Zhang, Zheng & He, Xu & Liu, Fushui, 2016. "Combustion and emission performance of a split injection diesel engine in a double swirl combustion system," Energy, Elsevier, vol. 114(C), pages 1135-1146.
    3. Qi, Dandan & Yang, Kaixuan & Zhao, Xuan & Mei, Danhua & Ying, Yaoyao & Xu, Lei & Tu, Xin & Liu, Dong, 2022. "Comprehensive optical diagnostics for flame behavior and soot emission response to a non-equilibrium plasma," Energy, Elsevier, vol. 255(C).

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