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Study on urea deposits risk of after-treatment system based on deposits boundary method

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Listed:
  • Lu, Kai
  • Bai, Shuzhan
  • Zang, Zhicheng
  • Li, Guoxiang

Abstract

The majority of previous technical solutions improved the exhaust ATS's anti-deposits by innovating the nozzle's spray atomization performance or optimizing the mixing chamber's structural design. These methods are difficult to meet product development needs due to the escalation of emission laws and harsh operating conditions. This paper proposes a deposits control method based on the deposits boundary of the ATS structure. The engine bench test was used to test the deposition of the ATS at four different rotational speeds with exhaust flow rate, temperature, and urea injection volumes. The test results were plotted as a deposits boundary map to form three deposition risk regions: high, medium and low. The middle line of the medium risk region was used as the deposits control strategy value, which is used for the urea injection of the entire ATS. Under WHTC cycle and WHSC cycle conditions, urea consumption with deposits boundary control strategy was reduced by 11.2% and 15.3%, respectively, compared to the consumption without deposits boundary control strategy. Based on this deposits boundary, the engine can evaluate the quantity of urea injection under each working situation within the deposits risk range, allowing it to achieve emission regulations and avoid ATS deposits failures.

Suggested Citation

  • Lu, Kai & Bai, Shuzhan & Zang, Zhicheng & Li, Guoxiang, 2023. "Study on urea deposits risk of after-treatment system based on deposits boundary method," Energy, Elsevier, vol. 267(C).
    • Handle: RePEc:eee:energy:v:267:y:2023:i:c:s036054422300018x
    DOI: 10.1016/j.energy.2023.126624
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    References listed on IDEAS

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    1. Zamboni, Giorgio & Moggia, Simone & Capobianco, Massimo, 2016. "Hybrid EGR and turbocharging systems control for low NOX and fuel consumption in an automotive diesel engine," Applied Energy, Elsevier, vol. 165(C), pages 839-848.
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    1. Gao, Wei & Liu, Ming & Yin, Junjie & Zhao, Yongliang & Chen, Weixiong & Yan, Junjie, 2023. "An improved control strategy for a denitrification system using cooperative control of NH3 injection and flue gas temperature for coal-fired power plants," Energy, Elsevier, vol. 282(C).

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    More about this item

    Keywords

    SCR; Urea; Deposits; NOx; ATS;
    All these keywords.

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