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Influence of water emulsified diesel & oxygen-enriched air on diesel engine NO-smoke emissions and combustion characteristics

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  • Zhang, Wei
  • Chen, Zhaohui
  • Shen, Yinggang
  • Shu, Gequn
  • Chen, Guisheng
  • Xu, Biao
  • Zhao, Wei

Abstract

Oxygen-enriched combustion of diesel engine can reduce smoke emission and improve thermal efficiency, but also lead to the increase of NO emission. In this research, experiments were conducted on a turbo-charged direct injection diesel engine under the two conditions of 2000 rpm and 180 Nm equivalent power (57% of the original max load at 2000 rpm) as well as 100% load of this speed. The combination of intake oxygen enrichment and water emulsified diesel was used to improve the NO-smoke emissions without serious penalty in brake specific fuel consumption (BSFC). The results showed that when engine load was 180 Nm with the conditions of 0%–20% water emulsion ratio and 21%–21.5% intake oxygen concentration, as well as under the condition of 100% load with 10%–15% water emulsion ratio and 21%–22% intake oxygen concentration, the NO-Smoke emissions were lower than that of original engine and BSFC was not exceeding 5% of the original engine by optimized combination of water emulsion ratio and oxygen concentration.

Suggested Citation

  • Zhang, Wei & Chen, Zhaohui & Shen, Yinggang & Shu, Gequn & Chen, Guisheng & Xu, Biao & Zhao, Wei, 2013. "Influence of water emulsified diesel & oxygen-enriched air on diesel engine NO-smoke emissions and combustion characteristics," Energy, Elsevier, vol. 55(C), pages 369-377.
    • Handle: RePEc:eee:energy:v:55:y:2013:i:c:p:369-377
    DOI: 10.1016/j.energy.2013.03.042
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