Review on CFD based models for co-firing coal and biomass

Tabet, Fouzi; Gökalp, İskender

doi:10.1016/j.rser.2015.07.045

Cited by 78 publications

(37 citation statements)

References 56 publications

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“…Once the fuel or mixed fuel is fed to the combustor, the following reactions occur continuously: preheating, evaporation or drying, devolatilization, gas-char combustion, pollutant generation, and radiation [8]. To understand this complex phenomenon, CFD is a powerful tool that can model and calculate fluid flows, heat and mass transfers, and chemical reactions as well as interactions of solids and fluids [9].…”

Section: Cfd Modeling For Coal and Biomass Cofiring Inside A Combustormentioning

confidence: 99%

Analysis of Biomass Waste Cofiring into Existing Coal-Fired Power Plant Using Computational Fluid Dynamics

Darmawan¹,

Budianto²,

Tokimatsu³

et al. 2018

Computational Fluid Dynamics - Basic Instruments and Applications in Science

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Biomass utilization to generate electricity via combustion simply can be classified into firing and cofiring. Biomass cofiring into the pulverized coal boilers has some advantages compared to dedicated biomass firing in terms of capital cost and combustion efficiency. To understand the cofiring behavior of biomass and coal comprehensively, computational fluid dynamics (CFD) method can be used to analyze and solve problems involving fluid flows inside a combustor. A CFD modeling is significantly more effective from the perspectives of time and cost and safety and ease of scaling up; hence, it is usually performed before conducting a physical investigation through experiment. Moreover, the current state-of-the-art CFD modeling-based study is capable of solving the complexity of the interdependent processes such as turbulence, heat transfer via radiation, produced gas, and reactions in both the particle and gas phases during combustion. This chapter focuses on the study of cofiring of biomass, which is palm mill wastes, into the existing coal-fired power plant. Two palm mill wastes are evaluated: palm kernel shell and hydrothermally treated empty fruit bunch. Distributions of temperature and the produced are simulated to find the most optimum and applicable cofiring conditions.

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Section: Cfd Modeling For Coal and Biomass Cofiring Inside A Combustormentioning

confidence: 99%

Analysis of Biomass Waste Cofiring into Existing Coal-Fired Power Plant Using Computational Fluid Dynamics

Darmawan¹,

Budianto²,

Tokimatsu³

et al. 2018

Computational Fluid Dynamics - Basic Instruments and Applications in Science

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“…The former acted as the feeding gas for the fuel and flowed through the inner tube, while the latter supplied the extra air required for combustion and flowed through the outer tube. Once the particles entered the combustor, continuous reactions occurred, including heating, drying, devolatilization, gas and char combustion, pollutant formation, and heat radiation [22]. The numerical calculation continued until the convergent condition was achieved (less than 10´4 for all residuals).…”

Section: Computational Modeling Of Palm Kernel Shell Co-firingmentioning

confidence: 99%

Computational Fluid Dynamic Analysis of Co-Firing of Palm Kernel Shell and Coal

Aziz

Budianto²,

Oda

2016

Energies

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Abstract:The increasing global demand for palm oil and its products has led to a significant growth in palm plantations and palm oil production. Unfortunately, these bring serious environmental problems, largely because of the large amounts of waste material produced, including palm kernel shell (PKS). In this study, we used computational fluid dynamics (CFD) to investigate the PKS co-firing of a 300 MWe pulverized coal-fired power plant in terms of thermal behavior of the plant and the CO 2 , CO, O 2 , NO x , and SO x produced. Five different PKS mass fractions were evaluated: 0%, 10%, 15%, 25%, and 50%. The results suggest that PKS co-firing is favorable in terms of both thermal behavior and exhaust gas emissions. A PKS mass fraction of 25% showed the best combustion characteristics in terms of temperature and the production of CO 2 , CO, and SO x . However, relatively large amounts of thermal NO x were produced by high temperature oxidation. Considering all these factors, PKS mass fractions of 10%-15% emerged as the most appropriate co-firing condition. The PKS supply capacity of the palm mills surrounding the power plants is a further parameter to be considered when setting the fuel mix.

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“…The turbulent reactive flow in the freeboard and the thermo-chemical conversion of biomass in the fuel bed are crucial for the simulation. Additional models can be used to describe other processes, for example pollutant formation [6]. For the numerical investigation of the straw fired boiler, the bed model is particularly important, as whole bales of straw are burned inside the combustion chamber.…”

Section: Cfd-simulations For Optimization Of Biomass Combustionmentioning

confidence: 99%

“…hemicellulose volatiles + char (5) lignin  volatiles + char (6) The kinetic parameters for drying and pyrolysis of the present study are summarized in table 1. Volatiles are composed of CO2, CO, CH4, H2 and H2O in this study.…”

Section: Cellulose  Volatiles + Char (4)mentioning

confidence: 99%

Numerical investigation of a straw combustion boiler – Part I: Modelling of the thermo-chemical conversion of straw

2016

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Abstract. In the framework of a European project, a straw combustion boiler in conjunction with an organic Rankine cycle is developed. One objective of the project is the enhancement of the combustion chamber by numerical methods. A comprehensive simulation of the combustion chamber is prepared, which contains the necessary submodels for the thermo-chemical conversion of straw and for the homogeneous gas phase reactions. Part I introduces the modelling approach for the thermal decomposition of the biomass inside the fuel bed, whereas part II deals with the simulation of the gas phase reactions in the freeboard.

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Review on CFD based models for co-firing coal and biomass

Cited by 78 publications

References 56 publications

Analysis of Biomass Waste Cofiring into Existing Coal-Fired Power Plant Using Computational Fluid Dynamics

Analysis of Biomass Waste Cofiring into Existing Coal-Fired Power Plant Using Computational Fluid Dynamics

Computational Fluid Dynamic Analysis of Co-Firing of Palm Kernel Shell and Coal

Numerical investigation of a straw combustion boiler – Part I: Modelling of the thermo-chemical conversion of straw

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