Numerical Simulation of Bed Combustion in Biomass-Briquette Boiler

Chen, Rong; Rao, Yu; Yue, Hanhong; Ai, Yu; Xia, Zhang; Zhang, Leilei; Zheng, Jiaxin

doi:10.1061/(asce)ey.1943-7897.0000653

Cited by 5 publications

(5 citation statements)

References 24 publications

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“…Therefore, this paper calculated gas phase turbulent transport in the simulation calculation using standard k-ε turbulence model. The general equation was as follows [19]:…”

Section: Mathematical Modelmentioning

confidence: 99%

Mixed Combustion Characteristics of Various Biomass Particles

Zhao¹,

Wei²

2023

JSE

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As a promising pollutant emission reduction technology, biomass mixed combustion has attracted widespread attention worldwide. This paper aimed to study the characteristics of biomass mixed combustion and temperature distribution. A combination of simulation and experimental methods was adopted. The results showed when four kinds of biomass were burned separately, their highest temperatures in the center section of combustion chamber were corn stalk>cotton stalk>sawdust>rice straw in descending order. Compared with other three biomass, the highest temperature of corn stalk was more than 100 K higher, which mainly occurred during the full combustion stage, mainly because corn stalk had high volatile content and caught fire easily. In addition, with the optimal mixed combustion parameters, biomass mixed combustion improved the combustion characteristics of single biomass combustion. The optimal blending ratio of corn stalk to rice straw was 7:3, and the optimal primary air velocity and temperature were 48 m/s and 1300 K, respectively. With the optimal blending ratio, the maximum temperature in the center section was higher than that of single biomass combustion, with advanced ignition point, relatively uniform temperature distribution in the combustion chamber and good combustion performance, because the precipitation and combustion of high volatile components during mixed combustion caused the surface temperature of fixed carbon to rise rapidly to reach the ignition temperature. Finally, this paper studied the combustion characteristics of corn stalk and rice straw with the optimal mixed combustion parameters in mixed combustion experiment, and verified the good consistency between the simulation and experimental values. Therefore, biomass mixed combustion technology provides an important reference for solving the problem of low calorific value of single biomass combustion.

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“…Therefore, this paper calculated gas phase turbulent transport in the simulation calculation using standard k-ε turbulence model. The general equation was as follows [19]:…”

Section: Mathematical Modelmentioning

confidence: 99%

Mixed Combustion Characteristics of Various Biomass Particles

Zhao¹,

Wei²

2023

JSE

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“…Moreover, the synchronous movement between the scraper and the rotor is also at the core of the working principle of the pump. Therefore, analysis of the synchronous motion between the swing scraper and the elliptical rotor will be key to the subsequent kinematic analysis [29,30]. This section will establish the mathematical model for synchronous motion between the rotor and the scraper.…”

Section: Mathematical Modelmentioning

confidence: 99%

“…Machines 2022, 10, x FOR PEER REVIEW 7 of 16 kinematic analysis [29,30]. This section will establish the mathematical model for synchronous motion between the rotor and the scraper.…”

Section: Mathematical Modelmentioning

confidence: 99%

Modeling, Kinematic Characteristics Analysis and Experimental Testing of an Elliptical Rotor Scraper Pump

Zhang

Yang

et al. 2022

Machines

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Against the backdrop of the rapid burgeoning of international energy engineering, the efficient utilization of energy is a paramount factor. The key idea in this paper is to propose an elliptical rotor scraper pump (ERSP) in order to address the imperfections and defects of traditional volume pumps, such as their labyrinthine design, low volume utilization efficiency and undesirable sealing performance. The ERSP can dramatically achieve the aims of ameliorating pump structure and improving energy efficiency. One of the Roots pump's rotors or the vane pump's shifting blade is replaced by a swing scraper in the ERSP. It is worth noting that a small swing range is a high-priority feature of the scraper; the scraper not only serves the purpose of dividing the pump cavity and self-sealing the unit but also reduces the noise level when working. A vital function of ERSP is the efficient conversion of mechanical energy into fluid pressure energy by changing the volume. Simultaneously, based on theoretical analysis, the mathematical model of the ERSP is established, and its kinematic characteristics are investigated, using ADAMS to verify the kinematic rationality of the ERSP. Ultimately, the research group manufactured a prototype of the pump, based on the previous simulation results and calculations, and experiments verified the feasibility of the pump. The design and research of the ERSP have essential reference significance for the development of fluid energy machinery technology.

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“…Biomass briquettes are often used as a renewable and low-carbon alternative to fossil fuels due to their low CO2 emissions. They are a sustainable energy source that has the potential to help reduce our reliance on fossil fuels [8,9]. However, the efficient combustion of biomass briquettes remains the main issue.…”

Section: Introductionmentioning

confidence: 99%

“…However, the efficient combustion of biomass briquettes remains the main issue. This is why a numerical simulation was chosen to optimize the biomass briquettes' burning characteristics [8,10]. As we further explore the realm of briquettes, it becomes clear that comprehending their energy assessment and moisture content is vital for their effective adoption and broad usage.…”

Section: Introductionmentioning

confidence: 99%

Analyzing Energy Performance and Assessing Dry Moisture Content of Briquettes through Numerical Investigations

Alabi,

Adeyi,

Ekun

2023

ETJ

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Numerical analysis of briquette performance reveals potential energy savings via optimized moisture content.• Findings suggest energy savings via optimization of moisture content in briquette production. • Briquette moisture optimization could lead to improved efficiency and performance, aiding sustainable energy.This study presents a comprehensive numerical investigation into the energy evaluation and determination of dry moisture content of briquettes, a vital aspect of renewable energy production. Utilizing advanced computational fluid dynamics (CFD) modeling and simulations, we explored key parameters impacting briquette combustion, such as moisture content, size, density, and temperature profiles. The research demonstrates that these factors significantly influence combustion behavior, with the CFD model accurately predicting mass loss curves and burnout times. The process was completed in 10 minutes, reaching a temperature of 300K and yielding gases consisting of CO2, CO, and H2O, while the devolatilization front was assumed to be at 325K. The drying front was estimated to occur within the range of 303K to 310K. This knowledge is pivotal in optimizing briquettes as a sustainable energy source, ensuring efficient energy conversion, and reducing environmental impact. By integrating engineering principles, thermodynamics, and computational modeling, our interdisciplinary approach addresses complex challenges in renewable energy. The research findings underscore the importance of refining and validating these models to advance the understanding and utilization of briquettes as a clean and eco-friendly energy alternative. In a world increasingly prioritizing environmental sustainability and energy efficiency, this research aligns with broader efforts to transition towards cleaner and more sustainable energy sources, offering prospects for a greener and responsible energy future.

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Numerical Simulation of Bed Combustion in Biomass-Briquette Boiler

Cited by 5 publications

References 24 publications

Mixed Combustion Characteristics of Various Biomass Particles

Mixed Combustion Characteristics of Various Biomass Particles

Modeling, Kinematic Characteristics Analysis and Experimental Testing of an Elliptical Rotor Scraper Pump

Analyzing Energy Performance and Assessing Dry Moisture Content of Briquettes through Numerical Investigations

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