NOx Emission Model of Heavy-Duty Diesel Vehicles Considering Exhaust Temperature Under Real-World Driving Conditions

被引：0
|
作者：
Ji Z. [1 ,2 ,3 ]
Wang X. [4 ]
Yin H. [3 ]
Fan P. [5 ]
Song G. [5 ]
机构：
[1] Hefei Institutes of Physical Science, Chinese Academy of Sciences, Anhui, Hefei
[2] Science Island Branch, Graduate School, University of Science and Technology of China, Anhui, Hefei
[3] State Environmental Protection Key Laboratory of Vehicle Emission Control and Simulation, Chinese Research Academy of Environmental Sciences, Beijing
[4] School of Traffic Management Engineering, Shandong Police College, Shangdong, Jinan
[5] Key Laboratory of Transport Industry of Big Data Application Technologies for Comprehensive Transport, Beijing Jiaotong University, Beijing
来源：
Huanan Ligong Daxue Xuebao/Journal of South China University of Technology (Natural Science) | 2024年 / 52卷 / 02期
关键词：
exhaust temperature model; heavy-duty diesel vehicle; NO[!sub]x[!/sub] emission; operating condition; Urea-SCR;
D O I：
10.12141/j.issn.1000-565X.230197
中图分类号：
学科分类号：
摘要：
Selective catalytic reduction technology (SCR) is one of the commonly used technologies to reduce nitrogen oxide (NOx) emissions from heavy-duty diesel vehicles. The efficiency of NOx conversion in the SCR system is closely related to the exhaust temperature. However, the existing NOx emission models primarily focus on vehicle driving conditions, neglecting the correlation with exhaust temperature. Thus, it increases the uncertainty of NOx emission measurement results, and challenges the establishment of emission inventory and the assessment of emission reduction policies. This study established a NOx emission rate library and a model based on actual vehicle operating conditions and measured emission data. Subsequently, an exhaust temperature model utilizing vehicle specific power (VSP) and heat loss coefficient was developed. Based on this, based on the chemical reaction principle in the SCR system, a NOx emission model incorporating exhaust temperature was derived. Finally, the proposed NOx model and the MOVES model (MOtor Vehicle Emission Simulator) were employed to estimate NOx emissions, which are then compared and analyzed against actual emissions. Results demonstrate the effectiveness of the proposed NOx emission model in real-world conditions, with relative errors of 9. 1%, 3. 9%, and 3. 3% observed across three heavy-duty diesel buses. These errors represent a reduction of 24. 0, 13. 1, and 16. 3 percentage points, respectively, when compared to the MOVES model. Additionally, analysis of NOx emission characteristics under different operating conditions reveals that the average NOx conversion rate of heavy diesel trucks is 39. 2 percentage points higher than that of diesel buses. © 2024 South China University of Technology. All rights reserved.
引用
收藏
页码：136 / 144
页数：8
相关论文
共 25 条
  • [1] HE Jicheng, Estimation of air pollutant emission from vehicles in Beijing-Harbin highway ［J］, Ecological Sci⁃ ence, 34, 1, pp. 154-157, (2015)
  • [2] FUGER S，, KURETI S．, Investigation of urea-SCR at low temperatures ［J］．Topics in Cataly⁃ sis, 60, 3/4/5, pp. 199-203, (2017)
  • [3] RAUCH D，, KUBINSKI D，, SIMON U, Detec⁃ tion of the ammonia loading of a Cu chabazite SCR cata⁃ lyst by a radio frequency-based method ［J］, Sensors and Actuators B, 205, pp. 88-93, (2014)
  • [4] after treatment of diesel exhausts, pp. 86-88, (2014)
  • [5] Deposit formation in urea-SCR systems, SAE Inter⁃ national Journal of Fuels and Lubricants, 2, 2, pp. 283-289, (2009)
  • [6] Control-oriented model of an SCR catalytic converter sys⁃ tem
  • [7] MOHAN D, Low temperature selective catalytic reduction（SCR）of NO<sub>x</sub> emissions by Mn-doped Cu/Al<sub>2</sub>O<sub>3</sub> catalysts ［J］, Bulletin of Chemical Reaction Engineering and Catalysis, 12, 3, pp. 415-429, (2017)
  • [8] HSIEH M F, WANG J．, Development and experimental studies of a control-oriented SCR model for a two-catalyst urea-SCR system ［J］, Control Engineering Practice, 19, 4, pp. 409-422, (2011)
  • [9] YU L, SONG G H．, Improved binning of operating modes in EPA simulator program for transit buses： case study in Beijing ［J］, Transportation Research Record, 2627, 1, pp. 57-66, (2017)
  • [10] ALAM A，, HATZOPOULOU M．, Modeling transit bus emissions using MOVES： comparison of default distribu⁃ tions and embedded drive cycles with local data ［J］, Journal of Transportation Engineering， Part A： Sys⁃ tems, 143, 10, pp. 040170491-040170499, (2017)
123