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Numerical simulation of sub-bituminous coal and bituminous coal mixed combustion employing tabulated-devolatilization-process model

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  • Hashimoto, Nozomu
  • Shirai, Hiromi

Abstract

To investigate the cause of the increase in the unburned fraction when sub-bituminous coal is mixed with bituminous coal observed in previous experimental research using a 100 kg-coal/h-class coal combustion test furnace, numerical simulations of the mixed combustion of sub-bituminous coal and bituminous coal are performed. To take into account the effect of the particle heating rate on the devolatilization parameters, the tabulated-devolatilization-process model (TDP model) is employed. The results show that the simulation could qualitatively reproduce the experimental results, which are an increase in flame lift-off with increasing sub-bituminous coal mixing ratio and a maximum value of the unburned fraction at a sub-bituminous coal mixing ratio of 25%. Furthermore, it is clarified from the simulation results that the nonlinear increase in the overall unburned fraction in the case of sub-bituminous coal mixing with bituminous coal is caused by the steep increase in the unburned fraction of bituminous coal particles with increasing sub-bituminous coal mixing ratio.

Suggested Citation

  • Hashimoto, Nozomu & Shirai, Hiromi, 2014. "Numerical simulation of sub-bituminous coal and bituminous coal mixed combustion employing tabulated-devolatilization-process model," Energy, Elsevier, vol. 71(C), pages 399-413.
    • Handle: RePEc:eee:energy:v:71:y:2014:i:c:p:399-413
    DOI: 10.1016/j.energy.2014.04.091
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    References listed on IDEAS

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    Cited by:

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    2. Hashimoto, Nozomu & Watanabe, Hiroaki & Kurose, Ryoichi & Shirai, Hiromi, 2017. "Effect of different fuel NO models on the prediction of NO formation/reduction characteristics in a pulverized coal combustion field," Energy, Elsevier, vol. 118(C), pages 47-59.
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    5. Zhan, Honglei & Zhao, Kun & Xiao, Lizhi, 2015. "Spectral characterization of the key parameters and elements in coal using terahertz spectroscopy," Energy, Elsevier, vol. 93(P1), pages 1140-1145.

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