Simulation of Aftertreatment Thermal Management Strategies for Low-Load Operation

Harris, Tony

doi:10.4271/2020-01-0359

Cited by 3 publications

(4 citation statements)

References 8 publications

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“…Therefore, the peak temperature of the SCR also needs to be considered. It can be solved using a logic block that was adopted to control the open and close of the burner in [128]. The burner turned off when the maximum set temperature was reached and turned on when it fell below the minimum set temperature.…”

Section: Scr Thermal Managementmentioning

confidence: 99%

“…This indicates that the burner heated up faster and its temperature was relatively stable. [128]. (c) The total quantity of NOx elimination with an SCR system only and with an SCR system assisted by a temperature control system [129].…”

Section: Scr Thermal Managementmentioning

confidence: 99%

“…Jiang et al [129] adopted a PCM to control the temperature of the SCR. After completing the preheating procedure in the European transient cycling (ETC) with a target temperature of 563 K, the fluctuation in the exhaust gas temperature was limited [128]. (c) The total quantity of NOx elimination with an SCR system only and with an SCR system assisted by a temperature control system [129].…”

Section: Scr Thermal Managementmentioning

confidence: 99%

“…(a) Comparison of times to heat SCR midbed to 200 • C [122]. (b) SCR inlet temperature data[128]. (c) The total quantity of NOx elimination with an SCR system only and with an SCR system assisted by a temperature control system[129].…”

mentioning

confidence: 99%

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A Review of Thermal Energy Management of Diesel Exhaust after-Treatment Systems Technology and Efficiency Enhancement Approaches

Wu,

Feng,

et al. 2024

Energies

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The DOC (diesel oxidation catalyst), DPF (diesel particulate filter), SCR (selective catalytic reduction), and ASC (ammonia slip catalyst) are widely used in diesel exhaust after-treatment systems. The thermal management of after-treatment systems using DOC, DPF, SCR, and ASC were investigated to improve the efficiency of these devices. This paper aims to identify the challenges of this topic and seek novel methods to control the temperature. Insulation methods and catalysts decrease the energy required for thermal management, which improves the efficiency of thermal management. Thermal insulation decreases the heat loss of the exhaust gas, which can reduce the after-treatment light-off time. The DOC light-off time was reduced by 75% under adiabatic conditions. A 400 W microwave can heat the DPF to the soot oxidation temperature of 873 K at a regeneration time of 150 s. An SCR burner can decrease NOx emissions by 93.5%. Electrically heated catalysts can decrease CO, HC, and NOx emissions by 80%, 80%, and 66%, respectively. Phase-change materials can control the SCR temperature with a two-thirds reduction in NOx emissions. Pt-Pd application in the catalyst can decrease the CO light-off temperature to 113 °C. Approaches of catalysts can enhance the efficiency of the after-treatment systems and reduce the energy consumption of thermal management.

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Section: Scr Thermal Managementmentioning

confidence: 99%

Section: Scr Thermal Managementmentioning

confidence: 99%