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Application of response surface methodology to determine effects of operational conditions on in-bed combustion fraction in vortexing fluidized-bed combustor using different fuels

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  • Cao, Songshan
  • Duan, Feng
  • Zhang, Lihui
  • Chyang, ChienSong
  • Yang, ChihYun

Abstract

Distinct secondary gas injection modes of a vortexing fluidized-bed combustor (VFBC) affect combustion fraction distribution, resulting in different combustion and pollutant emissions characteristics. To determine the important operational conditions, correlations that consider most of the VFBC parameters were derived to predict the in-bed combustion fraction in VFBC. The predictions obtained using the regression correlation analysis were in good agreement with the results of present experiments and with previously published results. Response surface methodology (RSM) was used to analyze the sensitivity of different coded factors based on established model. A new correlation equation, with a fewer parameters, based on the sensitivity analysis, was also developed and exhibited a positive predictive accuracy. Results demonstrate that the primary gas ratio, particle size, and fuel type significantly affect the combustion fraction. The in-bed combustion fraction increases with increasing particle size, and decreases with increasing primary gas ratio and the ratio of volatile to fixed carbon.

Suggested Citation

  • Cao, Songshan & Duan, Feng & Zhang, Lihui & Chyang, ChienSong & Yang, ChihYun, 2017. "Application of response surface methodology to determine effects of operational conditions on in-bed combustion fraction in vortexing fluidized-bed combustor using different fuels," Energy, Elsevier, vol. 139(C), pages 862-870.
    • Handle: RePEc:eee:energy:v:139:y:2017:i:c:p:862-870
    DOI: 10.1016/j.energy.2017.08.057
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    References listed on IDEAS

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    1. Duan, Feng & Liu, Jian & Chyang, Chien-Song & Hu, Chun-Hsuan & Tso, Jim, 2013. "Combustion behavior and pollutant emission characteristics of RDF (refuse derived fuel) and sawdust in a vortexing fluidized bed combustor," Energy, Elsevier, vol. 57(C), pages 421-426.
    2. Zhang, Li-hui & Chyang, Chien-Song & Duan, Feng & Li, Pin-Wei & Chen, Sing-Yu, 2016. "Comparison of the thermal behaviors and pollutant emissions of pelletized bamboo combustion in a fluidized bed combustor at different secondary gas injection modes," Energy, Elsevier, vol. 116(P1), pages 306-316.
    3. Kuprianov, Vladimir I. & Kaewklum, Rachadaporn & Chakritthakul, Songpol, 2011. "Effects of operating conditions and fuel properties on emission performance and combustion efficiency of a swirling fluidized-bed combustor fired with a biomass fuel," Energy, Elsevier, vol. 36(4), pages 2038-2048.
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    Cited by:

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    2. Li, Pin-Wei & Chyang, Chien-Song & Ni, Hung-Wen, 2018. "An experimental study of the effect of nitrogen origin on the formation and reduction of NOx in fluidized-bed combustion," Energy, Elsevier, vol. 154(C), pages 319-327.

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