Next Article in Journal
Effects of Bypass Flow Distribution on Cold Flow Characteristics of Integrated Afterburner
Next Article in Special Issue
Combustion Characterisation of Bituminous Coal and Pinus Sawdust Blends by Use of Thermo-Gravimetric Analysis
Previous Article in Journal
Data-Driven Prognostics of the SOFC System Based on Dynamic Neural Network Models

Article

# On the Mathematical Modelling of a Moving-Bed Counter-Current Gasifier Fuelled with Wood-Pellets

Institute of Energy Process Engineering and Fuel Technology, Clausthal University of Technology, Agricolastr 4, 38678 Clausthal-Zellerfeld, Germany
*
Author to whom correspondence should be addressed.
Academic Editors: Osvalda Senneca and Martin Schiemann
Energies 2021, 14(18), 5840; https://doi.org/10.3390/en14185840
Received: 1 July 2021 / Revised: 6 September 2021 / Accepted: 9 September 2021 / Published: 15 September 2021
The subject of this work is the mathematical modelling of a counter-current moving-bed gasifier fuelled by wood-pellets. Two versions of the model have been developed: the one-dimensional (1D) version-solving a set of Ordinary Differential Equations along the gasifier height-and the three-dimensional (3D) version where the balanced equations are solved using Computational Fluid Dynamics. Unique procedures have been developed to provide unconditionally stable solutions and remove difficulties occurring by using conventional numerical methods for modelling counter-current reactors.The procedures reduce the uncertainties introduced by other mathematical approaches, and they open up the possibility of straightforward application to more complex software, including commercial CFD packages. Previous models of Hobbs et al., Di Blasi and Mandl et al. used a correction factor to tune calculated temperatures to measured values. In this work, the factor is not required. Using the 1D model, the Mandl et al. 16.6 kW gasifier was scaled to 9.5 MW input; the 89% cold-gas efficiency, observed at 16.6 kW input, decreases only slightly to 84% at the 9.5 MW scale. View Full-Text
Keywords:
Show Figures

Figure 1

MDPI and ACS Style

Schwabauer, A.; Mancini, M.; Poyraz, Y.; Weber, R. On the Mathematical Modelling of a Moving-Bed Counter-Current Gasifier Fuelled with Wood-Pellets. Energies 2021, 14, 5840. https://doi.org/10.3390/en14185840

AMA Style

Schwabauer A, Mancini M, Poyraz Y, Weber R. On the Mathematical Modelling of a Moving-Bed Counter-Current Gasifier Fuelled with Wood-Pellets. Energies. 2021; 14(18):5840. https://doi.org/10.3390/en14185840

Chicago/Turabian Style

Schwabauer, Andreas, Marco Mancini, Yunus Poyraz, and Roman Weber. 2021. "On the Mathematical Modelling of a Moving-Bed Counter-Current Gasifier Fuelled with Wood-Pellets" Energies 14, no. 18: 5840. https://doi.org/10.3390/en14185840

Find Other Styles
Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

1