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Mechanism modeling of optimal excess air coefficient for operating in coal fired boiler

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  • Wang, Yanhong
  • Li, Xiaoyu
  • Mao, Tianqin
  • Hu, Pengfei
  • Li, Xingcan
  • GuanWang,

Abstract

Optimization of excess air coefficient is extremely significant for boiler operating performance. Currently theoretical modeling of optimal excess air coefficient is still an intractable technical issue for pulverized coal boiler, limits further efficient utilization of coal. In this work, a mechanistic optimization model considering influence mechanisms was developed to model optimal excess air coefficient under partial boiler loads. To investigate efficiency of analyzed steam boiler, indirect method and individual boiler losses computation was applied. The accuracy of model results was verified at three different partial loads. Subsequently, modeling approach is used for a case study on 660 MW boiler. Influence mechanism between excess air coefficient and boiler operating parameters was graphically analyzed and meticulously discussed. Optimum energy efficiency and exergy efficiency of boiler were determined and given accurately.

Suggested Citation

  • Wang, Yanhong & Li, Xiaoyu & Mao, Tianqin & Hu, Pengfei & Li, Xingcan & GuanWang,, 2022. "Mechanism modeling of optimal excess air coefficient for operating in coal fired boiler," Energy, Elsevier, vol. 261(PA).
    • Handle: RePEc:eee:energy:v:261:y:2022:i:pa:s0360544222020229
    DOI: 10.1016/j.energy.2022.125128
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    Cited by:

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    2. Wang, Yanhong & Zou, Zhihong & Lu, Ke & Li, Qi & Hu, Pengfei & Wang, Di, 2024. "Modeling for on-line monitoring of carbon burnout coefficient in boiler under partial load," Energy, Elsevier, vol. 288(C).
    3. Wang, Yanhong & Zou, Zhihong & Lu, Ke & Li, Qi & Li, Liyan, 2024. "Probing of operation economy for coal-fired unit under low loads with two fixed boundary conditions," Energy, Elsevier, vol. 288(C).

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