Comprehensive CFD modeling of the ash deposition in a biomass packed bed burner

Chapela, Sergio; Porteiro, Jacobo; Gómez, Miguel Ángel; Patiño, David; Mı́guez, J.L.

doi:10.1016/j.fuel.2018.07.121

Cited by 31 publications

(8 citation statements)

References 34 publications

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“…Solid material deposition and build-up is of importance in numerous industrial and natural processes ranging from sedimentation [1] via coal ash deposition [2] or air clean up towards biomass burning [3]. Hand in hand with the widespread presence and importance of solid material deposition comes the necessity to simulate it.…”

Section: Introductionmentioning

confidence: 99%

A Parallel Algorithm for Flux-Based Bounded Scalar Re-distribution

Isoz¹,

Plachá²

2022

Topical Problems of Fluid Mechanics 2022

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Let us assume a bounded scalar function ? : Q = I × ? ? ?0, 1?, I ? R, ? ? R3, where Q is an open bounded domain and its discrete counterpart ?h defined on a computational mesh Qh = Ih × ?h. The problem of redistribution of ?h over ?h ensuring the scalar boundedness while maintaining the invariance of R ?h ?h dV is surprisingly frequent within the field of computational fluid dynamics (CFD). The present contribution is motivated by the case arising from coupling Lagrangian particle tracking and particle deposition within ?h with Eulerian CFD computation. We propose an algorithm for ?h redistribution that is (i) based on fluxes over the computational cells faces, i.e. suitable for finite volume (FV) computations, (ii) localized, meaning that a cell ?h P with ?hP > 1 affects only its closest neighbors with ?h < 1, and (iii) designed for parallel computations leveraging the standard domain decomposition methods.

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Section: Introductionmentioning

confidence: 99%

A Parallel Algorithm for Flux-Based Bounded Scalar Re-distribution

Isoz¹,

Plachá²

2022

Topical Problems of Fluid Mechanics 2022

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“…The reduction of the ash fusion temperature also encourages the formation of slag on the surfaces in contact with the fuel bed. The fouling and slagging cause a decrease in thermal efficiency of the combustion systems, and may cause system damage [5][6][7][8][9].…”

Section: Introductionmentioning

confidence: 99%

CFD Simulation of an Internally Cooled Biomass Fixed-Bed Combustion Plant

et al. 2021

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The reduction of bed temperature in fixed-bed biomass combustion is an effective measure to lower pollutant emissions. Air staging and bed cooling solutions are active strategies to decrease the fuel bed temperature. This work presents a CFD study of a biomass fixed-bed combustion plant that is equipped with an internal cooling bed system. Eight different cases are calculated to analyze the effect of the total airflow, air staging ratios and bed cooling system on biomass combustion. The findings are validated against experimental data from the literature. The results show good accordance between the numerical results and the experimental data. The primary airflow rate has the biggest influence on the bed’s maximum temperatures. The internal bed cooling system is able to achieve an average bed temperature reduction of 21%, slowing the biomass thermal conversion processes. Bed cooling techniques can be combined with air staging and primary airflow reduction to reduce bed temperatures in order to reduce pollutant emissions and other undesirable phenomena, such as fouling or slagging.

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“…He and Dass (2018) investigate the main and interaction effects of design parameters on the performance of electrostatic precipitators through a full factorial two-level DOE. Chapela et al (2018) studied the deposition of undesirable matter of the surfaces in biomass combustion. In this study, authors developed a model using CFD and the effects of several operational parameters were tested through a robust central composite design based on a latin hyber-cube sampling.…”

Section: Introductionmentioning

confidence: 99%

Parameter and Design Analysis for Gasoline Direct Injection Injector using CFD and Design of Experiments

Biçer¹,

Yurtkuran

2020

JAFM

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Numerical modeling of internal nozzle flow can be regarded as an essential investigation in the field of gasoline direct injection system of combustion engines since it is directly connected with fuel spray atomization and subsequently efficiency of exhaust gas emission. Internal nozzle flow can be changed and formed according to several parameters such as; system pressure, chosen fuel type, the orientation of spray holes according to injector axis, conicity of spray holes and distribution of spray holes on valve-seat, etc. The changes in these parameters also affect the formation of cavitation inside of whole domain, spray angle and create wall-wetting on the spray hole surfaces. The present work investigates the parameter and design analysis in the valve-seat region of direct gasoline injection (GDI) injector using Computational Fluid Dynamics (CFD) and Design of Experiments (DOE). CFD is employed to study the behaviors of internal flow inside the valve-seat region according to several design parameters, whereas a mixed-level factorial design is used to test the significance of the effects on the response variables. In conclusion, the effects of the most significant factors on response parameters as amount of vapor formation, spray (Tau) angle, and pre-hole wall wetting are determined for further efficient design.

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Comprehensive CFD modeling of the ash deposition in a biomass packed bed burner

Cited by 31 publications

References 34 publications

A Parallel Algorithm for Flux-Based Bounded Scalar Re-distribution

A Parallel Algorithm for Flux-Based Bounded Scalar Re-distribution

CFD Simulation of an Internally Cooled Biomass Fixed-Bed Combustion Plant

Parameter and Design Analysis for Gasoline Direct Injection Injector using CFD and Design of Experiments

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