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A new streamer discharge chamber for nox removal from heavy vehicles: a simulation study

机译:用于去除重型车辆中的NOx的新型拖缆排放室:模拟研究

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摘要

The problem of air pollution caused by the production of nitrogen Oxides (NOx) from diesel engine vehicle at this time is one of the contributor factor in human health problems and environmental. Currently, there are many methods being used to reduce and treat NOx including selective catalytic reduction (SCR), NOx storage and reduction (NSR), exhaust gas recirculation (EGR) and electron beam irradiation. However, each method has its own limitations in removing the NOx from diesel engine exhaust. Non-thermal plasma (pulsed streamer discharge) was recognized as discharge of a potential technology for the removal of pollutants from diesel engine exhaust. Initial research finding shows that the use of Non-thermal Plasma equilibrium is a promising technique in controlling and removing the NOx from diesel engine vehicles. In this study, a new exhaust system that is a parallel cascaded chamber incorporating with Non-thermal plasma (pulse streamer discharge) was successfully designed and simulated. The use of parallel shape is to prevent any back pressure inside the chamber and the cascaded plasma chamber is chosen in order to repetitively remove and optimized the removal of NOx from exhaust chamber. A Simulation study have been carried out using Commercial Computational Fluid Dynamics (CFD) to assess the performance o f the plasma Chamber design against the removal of NOx from diesel engine exhaust. Several parameters including gap distance, length of the chamber and the number of cascaded were accounted to study the effects of the parameters to the overall system performance. The simulation result indicates that a gap distance o f 4-5 mm, chamber length of 190mm and three cascaded chamber have found to provide an optimum design of pulsed streamer discharge chamber for NOx removal.
机译:此时,由柴油发动机车辆产生的氮氧化物(NOx)引起的空气污染问题是造成人类健康问题和环境的因素之一。当前,有许多用于还原和处理NOx的方法,包括选择性催化还原(SCR),NOx储存和还原(NSR),废气再循环(EGR)和电子束辐照。但是,每种方法在从柴油机排气中去除NOx方面都有其自身的局限性。非热等离子体(脉冲流光放电)被认为是从柴油机排气中去除污染物的一种潜在技术。初步研究发现,使用非热等离子体平衡技术是控制和去除柴油发动机车辆中NOx的一种有前途的技术。在这项研究中,成功​​设计并模拟了一个新的排气系统,该系统是一个与非热等离子体(脉冲流光放电)结合的平行级联腔室。平行形状的使用是为了防止腔室内部出现任何背压,而选择级联的等离子体腔室是为了从排气腔室中反复去除并优化NOx的去除。已经使用商业计算流体动力学(CFD)进行了仿真研究,以评估等离子室设计相对于从柴油机排气中去除NOx的性能。考虑了间隙距离,腔室长度和级联数等几个参数,以研究这些参数对整体系统性能的影响。仿真结果表明,间隙距离为4-5 mm,腔室长度为190mm,三个级联腔室为脉冲流光放电室的NOx去除提供了最佳设计。

著录项

  • 作者

    Mohd. Noor Hafidah;

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  • 年度 2015
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  • 原文格式 PDF
  • 正文语种 en
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