CFD Simulation of Sawdust Gasification on Open Top Throatless Downdraft Gasifier

Vidian, Fajri; Sampurno, Rachmat Dwi; ail, Ism

doi:10.26480/jmerd.02.2018.106.110

Cited by 6 publications

(3 citation statements)

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“…This paper presents some improvements based on the related our framework by Fajri Vidian et al [16]. The Models of CFD Simulation study showed that the increase of equivalence ratio tend to decrease of CO, H2, CH4 and tar followed by increasing of temperature at the inside of the gasifier.…”

Section: Our Contributionmentioning

confidence: 99%

Design and Performance of Small-scale Downdraft Biomass Gasification: A Case Study of Rice Husks

Homzah¹,

Sampurno²,

Junaidi³

et al. 2022

Atlantis Highlights in Engineering

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Energy consumption and environmental pollutants have to become present issues. So, the reduced of energy fossil in the community is to overcome the highly prices of oil and gas. Therefore, an alternative energy innovation from biomass is needed. Gasification is to energy produces from solid material to convert into gases such as sawdust, leaves, rice husks and more gases. In this study, we made a small-scale design of biomass gasification. It will give more several advantages such as simple design, especially for rural area. In this research, we used methods consists of five stages. First is literature study; secondly to design and material process; thirdly is manufacturing and assembly; next stages is measurement and data collection; and the last stages is testing, which is evaluating the performance of gasification as possible modifying tools if needed. In this design, we used a fan-blower to supply fresh air as limited oxygen into the fuel column. The results of test, we obtained an average boiling time, the pot stove of 60 minutes which the temperature rises from 47.24 o C to 66 o C. It showed the temperature pot stove have to highest reached to 79.5 o C as the temperature available to water boiling. The performance test given the results as the hot start as the flame-fire temperature on top the stove. We obtained the highest temperature is to 146 o C and the average temperature is reached to 104.9 o C. Based on that we estimated energy is to 5.314 kJ/hr, is required cooking for one family in Indonesia, the coned downdraft gasification was design and assembly; the total height and diameter of 0.752m and of 0.158m. We found the thermal temperature reaches during the operation time varying between 45.8% -64.4% it's lowest to the highest value test using thermocouple data. As a conclusion of this study, we obtained the temperature of pot-stove is slowly reaches from 59.5% to 71.6% of boiling water.

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Section: Our Contributionmentioning

confidence: 99%

Design and Performance of Small-scale Downdraft Biomass Gasification: A Case Study of Rice Husks

Homzah¹,

Sampurno²,

Junaidi³

et al. 2022

Atlantis Highlights in Engineering

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“…According to the literature above, most approaches to fixed-bed reactor technology primarily use wood as the feedstock [33][34][35]. Some studies have been extended to include crop residue combustion, as seen in the work of Mätzing, Gehrmann [36].…”

Section: Introductionmentioning

confidence: 99%

CFDs Modeling and Simulation of Wheat Straw Pellet Combustion in a 10 kW Fixed-Bed Downdraft Reactor

Nath,

Chen,

Bowtell

et al. 2024

Processes

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This research paper presents a comprehensive study on the combustion of wheat straw pellets in a 10 kW fixed-bed reactor through a Computational Fluid Dynamics (CFDs) simulation and experimental validation. The developed 2D CFDs model in ANSYS meshing simulates the combustion process in ANSYS Fluent software 2021 R2. The investigation evaluates key parameters such as equivalence ratio, heating value, and temperature distribution within the reactor to enhance gas production efficiency. The simulated results, including combustion temperature and produced gases (CO2, CO, CH4), demonstrate a significant agreement with experimental combustion data. The impact of the equivalence ratio on the conversion efficiency and lower heating value (LHV) is systematically explored, revealing that an equivalence ratio of 0.35 is optimal for maximum gas production efficiency. The resulting producer gas composition at this optimum condition includes CO (~27.67%), CH4 (~3.29%), CO2 (~11.09%), H2 (~11.09%), and N2 (~51%). The findings contribute valuable insights into improving the efficiency of fixed-bed reactors, offering essential information on performance parameters for sustainable and optimized combustion.

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“…According to the literature mentioned above, most of the approaches to downdraft gasification technology primarily use wood as the feedstock [24][25][26]. Some studies have extended to include crop residue gasification, as seen in the work of Pandey, Prajapati [2].…”

Section: Introductionmentioning

confidence: 99%

CFD Simulation and Experimental Validation of Wheat Straw Pellet Gasification in a 10-kW Fixed Bed Gasifier: Enhanced Syngas Production

Nath,

Chen,

Bowtell

et al. 2024

Preprint

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This research paper presents a comprehensive study on the gasification of wheat straw pellets in a 10-kW fixed bed gasifier through a combination of Computational Fluid Dynamics (CFD) simulation and experimental validation. The developed 2D CFD model in ANSYS meshing simulates the gasification process in ANSYS Fluent software. The investigation evaluates key parameters such as equivalence ratio, higher heating value, and temperature distribution within the gasifier to enhance syngas production efficiency. The simulated results exhibit a noteworthy agreement with experimental data obtained from gasification. The impact of the equivalence ratio on gas production and lower heating value (LHV) is systematically explored, revealing that an equivalence ratio of 0.35 is optimal for syngas production. The resulting producer gas composition at this optimum condition includes CO (~27.67%), CH4 (~3.29%), CO2 (~11.09%), H2 (~11.09%), and N2 (~51%). The study further investigates the positive influence of reactor temperature on increasing syngas quantity while considering the uneven shape of the reactor and various thermal reactions affecting temperature, static pressure, velocity, and density. The findings contribute valuable insights to improve the efficiency of fixed-bed gasifiers, offering essential information on performance parameters for sustainable and optimized syngas production.

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CFD Simulation of Sawdust Gasification on Open Top Throatless Downdraft Gasifier

Cited by 6 publications

References 0 publications

Design and Performance of Small-scale Downdraft Biomass Gasification: A Case Study of Rice Husks

Design and Performance of Small-scale Downdraft Biomass Gasification: A Case Study of Rice Husks

CFDs Modeling and Simulation of Wheat Straw Pellet Combustion in a 10 kW Fixed-Bed Downdraft Reactor

CFD Simulation and Experimental Validation of Wheat Straw Pellet Gasification in a 10-kW Fixed Bed Gasifier: Enhanced Syngas Production

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