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A Comparative Energetic Analysis of Active and Passive Emission Control Systems Adopting Standard Emission Test Cycles

机译:采用标准排放测试周期的主动和被动排放控制系统的比较能量分​​析

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The present work aims at analysing and comparing the thermal performances of active and passive aftertreatment systems. A one-dimensional transient model has been developed in order to evaluate the heat exchange between the solid and the exhaust gas and to estimate the energy effectiveness of the apparatus. Furthermore, the effect of the engine operating conditions on the performances of emission control systems has been investigated considering standard emission test cycles. The analysis has demonstrated that the active flow control presents the higher thermal inertia and it appears more suitable to maintain the converter initial temperature level for a longer time after variations in engine load. Conversely, the traditional passive flow control is preferable when rapid “cooling” or “heating” of the solid phase is requested. Moreover, the investigation has highlighted the significant influence of the cycle time and converter length on the energetic performances of the aftertreatment apparatus.
机译:本工作旨在分析和比较主动和被动后处理系统的热性能。已开发出一维瞬态模型,以评估固体与废气之间的热交换并评估设备的能源效率。此外,已经在考虑标准排放测试周期的情况下研究了发动机工况对排放控制系统性能的影响。分析表明,主动流量控制具有较高的热惯性,并且似乎更适合在发动机负载变化后将转换器的初始温度水平保持更长的时间。相反,当要求快速“冷却”或“加热”固相时,传统的被动流量控制是可取的。而且,研究突出了循环时间和转换器长度对后处理装置的能量性能的重大影响。

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