A Steady State Model for Burning Coal Mine Methane in a Reverse Flow Burner
Abstract
:1. Introduction
2. Numerical Model
2.1. Geometry of the RFB
- (1)
- The gas flow in porous media is laminar and the working gas is non-radiating.
- (2)
- The packing bed is inert and has an optical thickness, and the solid radiation is computed by the Rosseland assumption.
- (3)
- Pressure drop in the packed bed is neglected.
2.2. Steady State Model
2.3. Boundary Conditions, Initial Condition and Solution Process
- (1)
- Inlet:
3. Model Verification
4. Results and Discussions
4.1. Temperature and Species Distribution at LCL
4.2. Effect of Heat Loss on Lean Combustibility Limit
4.3. Effect of Burner Length on Lean Combustibility Limit
4.4. Computational Time Comparison
5. Conclusions
Author Contributions
Funding
Institutional Review Board Statement
Informed Consent Statement
Data Availability Statement
Acknowledgments
Conflicts of Interest
Nomenclature
Abbreviations | |
c | specific heat, |
Di | diffusion coefficient of species i, cm2/s |
hi | the molar enthalpy of species i, |
T | temperature, K |
ug | gas mixture velocity, m/s |
x | coordinate, m |
dpore | pore diameter of porous media, m |
hv | convective heat transfer coefficient, |
t | time, s |
T0 | ambient temperature, K |
Wi | molecular weight of species i, |
Y | mass fraction |
Greek symbols | |
equivalent ratio | |
radiation conductivity, | |
density, | |
solid surface emissivity | |
heat loss coefficient, | |
thermal conductivity, | |
thermal conductivity of packed bed, | |
porosity | |
reaction rate of species i, | |
Stephan-Boltzmann constant, | |
subscripts | |
G | gas |
S | solid |
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Lv, J.; Shi, J.; Mao, M.; Kong, X.; Zhou, D. A Steady State Model for Burning Coal Mine Methane in a Reverse Flow Burner. Energies 2021, 14, 7957. https://doi.org/10.3390/en14237957
Lv J, Shi J, Mao M, Kong X, Zhou D. A Steady State Model for Burning Coal Mine Methane in a Reverse Flow Burner. Energies. 2021; 14(23):7957. https://doi.org/10.3390/en14237957
Chicago/Turabian StyleLv, Jinsheng, Junrui Shi, Mingming Mao, Xiangjin Kong, and Dan Zhou. 2021. "A Steady State Model for Burning Coal Mine Methane in a Reverse Flow Burner" Energies 14, no. 23: 7957. https://doi.org/10.3390/en14237957