Advances in the science and technology of diesel particulate filter simulation

Konstandopoulos, Athanasios G.; Kostoglou, Margaritis; Vlachos, Nickolas; Kladopoulou, Evdoxia

doi:10.1016/s0065-2377(07)33004-4

Cited by 46 publications

(27 citation statements)

References 46 publications

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“…In the other test the pre-DPF water injection began at 9 g (3.3 g/l) and the loading continued up to 30 g (11 g/l). The maximum loading for this second test agrees with the value commonly accepted as high soot loading to promote active regeneration [25] because of excessive pressure drop and hence fuel penalty [19,26]. In fact, although the optimum soot loading to perform active regeneration reducing fuel penalty depends on the specific strategy [20], studies performed by Singh et al [27] found the optimum soot loading in 5.5 g/l to limit the fuel penalty due to excessive pressure drop.…”

Section: Types Of Testssupporting

confidence: 78%

Pre-DPF water injection technique for pressure drop control in loaded wall-flow diesel particulate filters

et al. 2015

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ElsevierBermúdez Tamarit, VR.; Serrano Cruz, JR.; Piqueras Cabrera, P.; Garcia Afonso, O. (2015 AbstractWall-flow type diesel particulate filter (DPF) is a required aftertreatment system for particle emission abatement and standards fulfilment in Diesel engines. However, the DPF use involves an important flow restriction, especially as the substrate gets soot and ash loaded. It gives as a result the increase of the exhaust back-pressure and hence a fuel consumption penalty. The increasing damage of fuel consumption with DPF soot loading leads to the need of the regeneration process. Usually based on active strategies, this process involves an additional fuel penalty but prevents from excessive DPF pressure drop and ensures secure soot burnt out.Under this context, new solutions are required to improve the state of the art DPF soot loading to pressure drop ratio. This paper presents a novel technique based on pre-DPF water injection to reduce the DPF pressure drop under soot loading conditions by disrupting its dependence on soot/ash loading. It provides benefits to engine fuel economy and also higher flexibility for DPF regeneration and maintenance. The work covers a test campaign performed in a passenger car turbocharged Diesel engine equipped with a wall-flow DPF. The main objective is to describe the technique, to provide a figure of its potential for pressure drop control and fuel consumption reduction. The results of the experiments also confirm soot and ash loading capacity increase and demonstrate the lack of negative effects on filtration efficiency and active and passive regeneration.

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Section: Types Of Testssupporting

confidence: 78%

Pre-DPF water injection technique for pressure drop control in loaded wall-flow diesel particulate filters

et al. 2015

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“…Accordingly, they corrected the network analog assigning equal lengths to the two heat transfer paths R1 and R2 (''series equalized model'', Table 1). The reader should be aware that the expression for the calculation of k e,r given in [12] is incorrect and does not follow from the hypothesis given in the same work. In Table 1, however, the correct expression derived from such a model is given.…”

Section: Effective Radial Conductivitymentioning

confidence: 99%

“…(1) and (2) show that both the shape of the channel and the washcoat distribution do not affect k e,a : this is related to the fact that the path followed by heat along the axial direction is straight, independently of the channel and washcoat geometries. Accordingly, such equations can be used Konstandopoulos et al [12] Hayes et al [9] This paper Resistance layout Equivalent thermal resistance scheme for any bare or washcoated honeycomb monolith, provided that the cross-sectional area of each phase is constant over the axial distance.…”

Section: Heterogeneous Modelsmentioning

confidence: 99%

“…Eleven years after the just-mentioned paper, Konstandopoulos et al [12] observed that the approach proposed by Groppi and Tronconi [8] to compute k e,r does not retain the square network symmetry, because it assigns a larger element length to the lower resistance path, R1, and vice versa for R2. Accordingly, they corrected the network analog assigning equal lengths to the two heat transfer paths R1 and R2 (''series equalized model'', Table 1).…”

Section: Effective Radial Conductivitymentioning

confidence: 99%

“…2, the predictions of the series model, of the series equalized model and of the parallel model are plotted against the honeycomb monolith void fraction, and compared with the numerical solution (computed with Fluent, following the approach proposed in [12]) of the heat conduction equation in the primary geometric unit (i.e. a quarter of channel, Fig.…”

Section: Effective Radial Conductivitymentioning

confidence: 99%

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The German “Energiewende” is heavily based on electric power and, therefore, requests solutions to serve non‐electric energy uses and to store electric energy in large scale. Synthetic natural gas (SNG) produced with hydrogen from water electrolysis and with CO2 from mainly renewable sources is one approach. For the catalytic SNG production efficient removal and utilization of the reaction heat is the main issue. A metallic honeycomb‐like carrier‐based reactor proved in laboratory scale to match this challenge. This type of reactor shows good heat conductivity and enables optimized operation. In the EU‐funded project Store&Go the honeycomb methanation is scaled up to MW‐scale. For this, heat transfer and kinetic data were determined experimentally and used in CFD calculations for the reactor design. Finally a SNG plant with 1 MW feed‐in will be built and fully integrated operation will be shown.

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Advances in the science and technology of diesel particulate filter simulation

Cited by 46 publications

References 46 publications

Pre-DPF water injection technique for pressure drop control in loaded wall-flow diesel particulate filters

Pre-DPF water injection technique for pressure drop control in loaded wall-flow diesel particulate filters

Accurate prediction of the effective radial conductivity of highly conductive honeycomb monoliths with square channels

Scale‐Up of Innovative Honeycomb Reactors for Power‐to‐Gas Applications – The Project Store&Go

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