Modelling fuel flexibility in fixed-bed biomass conversion with a low primary air ratio in an updraft configuration

Anca-Couce, Andrés; Archan, Georg; Buchmayr, Markus; Eßl, Michael; Hochenauer, Christoph; Scharler, Robert

doi:10.1016/j.fuel.2021.120687

Cited by 10 publications

(5 citation statements)

References 39 publications

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“…As shown in Figure 16, the temperatures near the bottom of the furnace and the thermal energy storage wall surface were high, and the temperature drops rapidly in the thermal energy storage part and changes slightly above the thermal energy storage part; this temperature change trend is similar to that in [10,56]. On the one hand, the particles are in contact with the high-temperature thermal energy storage wall surface for heat exchange via conduction and radiation; on the other hand, after the inflow of the high-temperature gasification agent, the C(s) at the bottom of the furnace reacts with O 2 to generate heat, and the gas flows through the particles to transfer the bottom heat to the upper part of the furnace via convection and conduction.…”

Section: Temperature Distributionmentioning

confidence: 62%

“…Then, the sum of the mass fractions of the three gases was taken as the benchmark to calculate the relative mass fractions of H 2 , CO, and CO 2 . By comparing the results of these studies, it can be seen that the H 2 fraction of the gas produced by our device has a significant advantage when the particles are biomass and the gasification agent is air [10,35,56]; it is 2-3 times higher than that in other studies and can reach a maximum of about 2.9 times. This indicates that the new design of the device is beneficial for improving the gas species to increase H 2 production.…”

Section: Studymentioning

confidence: 74%

“…Device Type Raw Material Simulation Method Spatial Scale [30] Downdraft fixed bed biomass DPM 2D [29] Updraft fixed bed biomass DEM 2D [10] Updraft fixed bed biomass -1D [34] Downdraft fixed bed biomass DPM 2D [35] Updraft fixed bed biomass TFM 2D [36] Updraft fixed bed coal TFM 2D [31] Downdraft fixed bed biomass DPM 2D…”

Section: Researchmentioning

confidence: 99%

“…Common gasification devices include rotary kilns, fluidized beds, entrained flow beds, and fixed beds [9]. Among them, the fixed bed has unique characteristics, such as simple operation, low cost, high economic benefits, low technical requirements, and small-scale application [10,11]. Such advantages can facilitate the addressing of low solid waste treatment capacity and the urgent need for lightweight gasification reactors in small and medium-sized cities and rural areas, which prompted the selection of the fixed bed reactor for our research.…”

Section: Introductionmentioning

confidence: 99%

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CFD Simulation and Experimental Study on a Thermal Energy Storage–Updraft Solid Waste Gasification Device

Sun

Wang

et al. 2023

Energies

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A thermal energy storage–updraft gasification device is a type of reactor that should be considered for use in solid waste gasification research that can save energy. However, the operating parameters and internal flow field during its operation remain unclear. In this study, a numerical model of the thermal energy storage–solid waste gasification device based on the computational fluid dynamics dense discrete phase model (CFD-DDPM) which had almost never been used before was established, and an innovative method that causes particles to be piled to simulate the gasification process was proposed according to the updraft fixed bed gasification characteristics; meanwhile, solid waste gasification experiments were conducted on the device. This study focused on the influence of moisture content and excess air coefficient on the gasification process of solid waste particles, and the velocity, pressure, temperature, and species distribution of the internal flow field of the device were analyzed. Simulation results showed that the higher the moisture content of particles, the greater the amplitude of changes in the internal physical field of the device. The fluid pressure drop is around 25 Pa–75 Pa for different working conditions. The combustible species of the gas of moist particles raise slightly with the increase in excess air coefficient, while the dry particles have the opposite effect. Compared with other gasification devices of the same type, the hydrogen production of this device is about 2–3 times higher. Our findings could facilitate the analysis, predict the operation status, and provide a theoretical basis for the improvement of this device.

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Section: Temperature Distributionmentioning

confidence: 62%

Section: Studymentioning

confidence: 74%

Section: Researchmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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CFD Simulation and Experimental Study on a Thermal Energy Storage–Updraft Solid Waste Gasification Device

Sun

Wang

et al. 2023

Energies

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“…The production of the dead zone by the secondary air inlet configures and the driving of flame toward the combustion chamber wall by the downflow were identified in the simulation. Anca-Couce et al 339 found that the recirculation gas could reduce the maximum bed temperature in a packed bed. Gu et al 340 found that the large particle with a diameter of 25 mm inclined to postpone the ignition.…”

Section: Drying In Thermochemical Converting Reactormentioning

confidence: 99%

Recent Advances in CFD Simulations of Multiphase Flow Processes with Phase Change

Zhu

Zhang

et al. 2023

Ind. Eng. Chem. Res.

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Phase change is a phenomenon that has been extensively utilized in chemical engineering, energy, electronics, vehicle, and space exploration. From both the science and engineering perspectives, gaining a profound understanding of the intricacies of multiphase flow processes accompanied by heat and mass transfer due to phase change is of fundamental importance. Indeed, the computational fluid dynamics (CFD) has been increasingly applied as an effective tool to give an in-depth and efficient analysis of the phase change processes, thereby enhancing our understanding and capacity to control and optimize the phase change effects in these processes. This paper seeks to provide a comprehensive review of the utilization of CFD methodologies in the simulations of phase change flows across various applications, including temperature management, drying, separation and purification, and others. First, the CFD models at various scales that are developed to elucidate the phase change processes are summarized. Second, the noteworthy advances in the recent CFD simulation work on various phase change processes are presented, respectively. Finally, the challenges and potential prospects to facilitate the application of the phase change flow are discussed. The current review aims to offer insightful guidance for the CFD modeling of phase change processes in numerous engineering application scenarios.

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Thermochemical Conversion of Lignocellulosic Biomass for Biohydrogen Production

Santana

Santos

Silva

et al. 2022

Clean Energy Production Technologies

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Modelling fuel flexibility in fixed-bed biomass conversion with a low primary air ratio in an updraft configuration

Cited by 10 publications

References 39 publications

CFD Simulation and Experimental Study on a Thermal Energy Storage–Updraft Solid Waste Gasification Device

CFD Simulation and Experimental Study on a Thermal Energy Storage–Updraft Solid Waste Gasification Device

Recent Advances in CFD Simulations of Multiphase Flow Processes with Phase Change

Thermochemical Conversion of Lignocellulosic Biomass for Biohydrogen Production

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