CFD Steady Model Applied to a Biomass Boiler Operating in Air Enrichment Conditions

Gómez, Miguel Ángel; Martín, Rubén; Collazo, J.; Porteiro, Jacobo

doi:10.3390/en11102513

Cited by 6 publications

(4 citation statements)

References 40 publications

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“…Recently, more advanced pyrolysis models have been developed to consider the complex interactions between the solid fuel, volatile gases, and char. These models include the discrete particle model, the multi-scale model, and the detailed chemistry model [37][38][39][40][41]. The discrete particle model (DPM) is a Lagrangian approach that tracks the individual particles of solid fuel, volatile gases, and char.…”

Section: A Brief Overview Of Cfd Modeling Techniques For Pyrolysismentioning

confidence: 99%

Advances in Computational Fluid Dynamics Modeling for Biomass Pyrolysis: A Review

Kulkarni,

Mishra,

Palla

et al. 2023

Energies

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Pyrolysis, a process for extracting valuable chemicals from waste materials, leverages computational fluid dynamics (CFD) to optimize reactor parameters, thereby enhancing product quality and process efficiency. This review aims to understand the application of CFD in pyrolysis. Initially, the need for pyrolysis and its role in biomass valorization are discussed, and this is followed by an elaboration of the fundamentals of CFD studies in terms of their application to the pyrolysis process. The various CFD simulations and models used to understand product formation are also explained. Pyrolysis is conducted using both conventional and microwave-assisted pyrolysis platforms. Hence, the reaction kinetics, governing model equations, and laws are discussed in the conventional pyrolysis section. In the microwave-assisted pyrolysis section, the importance of wavelength, penetration depth, and microwave conversion efficiencies on the CFD are discussed. This review provides valuable insights to academic researchers on the application of CFD in pyrolysis systems. The modeling of pyrolysis by computational fluid dynamics (CFD) is a complex process due to the implementation of multiple reaction kinetics and physics, high computational cost, and reactor design. These challenges in the modeling of the pyrolysis process are discussed in this paper. Significant solutions that have been used to overcome the challenges are also provided with potential areas of research and development in the future of CFD in pyrolysis.

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Section: A Brief Overview Of Cfd Modeling Techniques For Pyrolysismentioning

confidence: 99%

Advances in Computational Fluid Dynamics Modeling for Biomass Pyrolysis: A Review

Kulkarni,

Mishra,

Palla

et al. 2023

Energies

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“…Cravero et al [32] used a CFD model for designing and developing innovative configurations in regenerative furnaces. Gómez et al [33] analyzed the formation of emissions at different oxygen concentrations in a boiler using a CFD model. Nieckele et al [34] described CFD methodology for simulation modeling of an industrial aluminum melting furnace.…”

Section: Computational Fluid Dynamics (Cfd) Model Of Emissions Formationmentioning

confidence: 99%

Analyzing the Formation of Gaseous Emissions during Aluminum Melting Process with Utilization of Oxygen-Enhanced Combustion

Dzurňák

Varga

Jablonský

et al. 2021

Metals

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Oxygen-enhanced combustion (OEC) is a useful method for improving the efficiency of thermal plants and for decreasing greenhouse gas (GHG) emissions. Basic and modified burner designs utilizing OEC in the aluminum melting process in a rotary tilting furnace were studied. A combined approach comprising experimental measurement and simulation modeling was adopted aimed at assessing GHG emissions production. Reduction of up to 60% fuel consumption of the total natural gas used in the laboratory-scale furnace was achieved. The optimal oxygen concentration in the oxidizer regarding the amount of total GHG emissions produced per charge expressed as CO2 equivalent was 35% vol. Its further increase led only to marginal fuel savings, while the nitrogen oxide emissions increased rapidly. Using the modified burner along with OEC led to around 10% lower CO2 emissions and around 15% lower total GHG emissions, compared to using a standard air/fuel burner. CFD simulations revealed the reasons for these observations: improved mixing patterns and more uniform temperature field. Modified burner application, moreover, enables furnace productivity to be increased by shortening the charge melting time by up to 16%. The presented findings demonstrate the feasibility of the proposed burner modification and highlight its better energy and environmental performance indicators, while indicating the optimal oxygen enrichment level in terms of GHG emissions for the OEC technology applied to aluminum melting.

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“…A new method of boiler exergy calculation for estimating the exergy loss and exergy efficiency was studied by Behbahaninia et al [23]. Gomez set up a model to simulate biomass boilers in a different environment and analyzed the results, which showed that an increase in oxygen concentration can reduce CO emissions [29]. In this study, the exergy loss of flue gas is divided into the physical component and the chemical component.…”

Section: Introductionmentioning

confidence: 99%

Numerical Investigation on the Impact of Exergy Analysis and Structural Improvement in Power Plant Boiler through Co-Simulation

Yin

Jin

et al. 2022

Energies

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In current power station boilers, fuel burns at a low temperature, which results in low exergy efficiency. This research combined the second law of t with the boiler structure to maximize the efficiency of a 350 MW power plant boiler. A three-dimensional simulation of the combustion process at the power plant boiler is performed. A one-dimensional simulation model of the boiler is then constructed to calculate the combustion exergy loss, heat transfer exergy loss, and boiler exergy efficiency. Under the principle of high-temperature air combustion technologies, this paper also proposes a new structure and improved operating parameters to improve the exergy efficiency of boilers by reducing the heat exchange area of the economizer and increasing the heat exchange area of the air preheater. Simulation results show that the exergy efficiency of the boiler increased from 47.29% to 48.35% through the modified model. The simulation outcomes can instruct future optimal boiler design and controls.

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CFD Steady Model Applied to a Biomass Boiler Operating in Air Enrichment Conditions

Cited by 6 publications

References 40 publications

Advances in Computational Fluid Dynamics Modeling for Biomass Pyrolysis: A Review

Advances in Computational Fluid Dynamics Modeling for Biomass Pyrolysis: A Review

Analyzing the Formation of Gaseous Emissions during Aluminum Melting Process with Utilization of Oxygen-Enhanced Combustion

Numerical Investigation on the Impact of Exergy Analysis and Structural Improvement in Power Plant Boiler through Co-Simulation

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