Performance study of a woody downdraft gasifier: Numerical investigation and experimental validation
Author Identifier
Barun Das: https://orcid.org/0000-0001-5687-4768
Document Type
Journal Article
Publication Title
Bioenergy Research
Volume
18
Issue
1
Publisher
Springer
School
School of Engineering
RAS ID
76839
Abstract
Biomass gasification is an established and widely utilized renewable energy system. The research work aims to develop and construct a downdraft gasifier to investigate gasifier performance. The gasifier’s performance and cold gas efficiency were calculated for three volumetric airflow rates: 7.16 m3/h, 5.97 m3/h, and 4.78 m3/h. The efficiency was found maximum of 69.6% for an airflow rate of 7.16 m3/h. The oxidation zone and neck region of the gasifier reactor had the maximum recorded temperatures of 845 °C and 823 °C for Swietenia macrophylla (SM) and Mangifera indica (MI), respectively. A two-dimensional computational fluid dynamics (CFD) model for a downdraft gasifier was also developed using ANSYS/FLUENT software. The simulation results provided valuable insights into thermal characteristics and the gasification process taking place inside the gasifier. Taking into account the introduction of wood at a rate of 6.2 kg/h and the flow of air at a rate of 7.16 m3/h, predictions were made about the composition of syngas, and subsequently, validation of the model was conducted with experimental data. The simulation study visually represents the gasification process, illustrating the distribution of velocity and the contours of carbon monoxide, carbon dioxide, and hydrogen within the gasifier.
DOI
10.1007/s12155-024-10807-7
Creative Commons License
This work is licensed under a Creative Commons Attribution-No Derivative Works 4.0 License.
Comments
This is an Author's Accepted Manuscript of: Hossain, M. S., Bhowmik, S., Riad, M. I., Kibria, M. G., Das, B. K., & Paul, S. (2025). Performance study of a woody downdraft gasifier: Numerical investigation and experimental validation. BioEnergy Research, 18. https://doi.org/10.1007/s12155-024-10807-7
This version of the article has been accepted for publication, after peer review (when applicable) and is subject to Springer Nature’s AM terms of use, but is not the Version of Record and does not reflect post-acceptance improvements, or any corrections. The Version of Record is available online at: http://dx.doi.org/10.1007/s12155-024-10807-7