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Constructal design for supercharged boiler superheater

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  • Feng, Huijun
  • Xie, Zhuojun
  • Chen, Lingen
  • Wu, Zhixiang
  • Xia, Shaojun

Abstract

Constructal design of a SB superheater is carried out under the prerequisite of fixed total heat exchange area to realize its performance improvement. A complex function (CF) which consists of the heat transfer rate and power consumption of the SB superheater is considered as the optimization objective, and the tube outer diameter (TOD), number of tubes per row (NTPR) and number of the tube rows (NTR) are optimized, respectively. The optimal construct and corresponding optimal performance of the SB superheater are obtained. The influences of the heat preservation coefficient (HPC), excess air coefficient (ECA) and fuel consumption rate (FCR) on the optimization results are investigated. The research results indicate that compared with the initial performances of the superheater, the CFs after primary optimizations for the variables of TOD, NTPR and NTR are reduced by 2.6%, 0.9% and 2.6%, respectively. The CF can be further reduced by double and triple optimizations, respectively. Augmenting the HPC, ECA and FCR can all boost the overall performance of the boiler superheater. The weight coefficient has both quantitative and qualitative effects on the optimal results. The research results gained from this paper can be of theoretical assistances to the structure designs of different SB superheaters.

Suggested Citation

  • Feng, Huijun & Xie, Zhuojun & Chen, Lingen & Wu, Zhixiang & Xia, Shaojun, 2020. "Constructal design for supercharged boiler superheater," Energy, Elsevier, vol. 191(C).
    • Handle: RePEc:eee:energy:v:191:y:2020:i:c:s0360544219321796
    DOI: 10.1016/j.energy.2019.116484
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    References listed on IDEAS

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    6. Dongliang Li & Shaojun Xia & Jianghua Geng & Fankai Meng & Yutao Chen & Guoqing Zhu, 2022. "Discriminability Analysis of Characterization Parameters in Micro-Leakage of Turbocharged Boiler’s Evaporation Tube," Energies, MDPI, vol. 15(22), pages 1-20, November.
    7. Huijun Feng & Wei Tang & Lingen Chen & Junchao Shi & Zhixiang Wu, 2021. "Multi-Objective Constructal Optimization for Marine Condensers," Energies, MDPI, vol. 14(17), pages 1-18, September.
    8. Wang, Chaoyang & Liu, Ming & Zhao, Yongliang & Yan, Junjie, 2021. "Thermodynamic optimization of the superheater during switching the load transient processes," Energy, Elsevier, vol. 218(C).
    9. Zhu, Meng & Zhou, Jing & Chen, Lei & Su, Sheng & Hu, Song & Qing, Haoran & Li, Aishu & Wang, Yi & Zhong, Wenqi & Xiang, Jun, 2022. "Economic analysis and cost modeling of supercritical CO2 coal-fired boiler based on global optimization," Energy, Elsevier, vol. 239(PD).
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