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Bottleneck of slab thermal efficiency in reheating furnace based on energy apportionment model

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  • Chen, Demin
  • Lu, Biao
  • Dai, FangQin
  • Chen, Guang
  • Zhang, Xihe

Abstract

To reveal distribution of slab thermal efficiency (STE) and its bottlenecks, a slab region thermal efficiency (SRTE) model and an STE model were established based on the energy apportionment model of a reheating furnace in this paper. The bottleneck index of the slab thermal efficiency (BISTE), which could be used to assess the influence of SRTE on STE in a particular region, was proposed. First, the regional energy balance equation was listed based on reheating furnace region division. Next, the SRTE and STE models were established. Second, the bottleneck of slab thermal efficiency (BSTE) was achieved through a partial correlation analysis (PCA) of billet samples, which were obtained according to the difference between billet loading temperature and its residence time in the reheating furnace. Next, the BISTE was advanced to accurately determine the BSTE. Finally, several suggestions or measures, that could improve SRTE, were proposed. The case study has demonstrated the validation of these models, and the BISTE was 42% (Preheating), 19% (Heating II), 18% (Soaking), 11% (Heating I) and 10% (Preheating & Heating), respectively. Therefore, the preheating zone is the key region used to improve STE.

Suggested Citation

  • Chen, Demin & Lu, Biao & Dai, FangQin & Chen, Guang & Zhang, Xihe, 2018. "Bottleneck of slab thermal efficiency in reheating furnace based on energy apportionment model," Energy, Elsevier, vol. 150(C), pages 1058-1069.
    • Handle: RePEc:eee:energy:v:150:y:2018:i:c:p:1058-1069
    DOI: 10.1016/j.energy.2018.02.149
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    2. Hu, Yukun & Tan, CK & Niska, John & Chowdhury, Jahedul Islam & Balta-Ozkan, Nazmiye & Varga, Liz & Roach, Paul Alun & Wang, Chunsheng, 2019. "Modelling and simulation of steel reheating processes under oxy-fuel combustion conditions – Technical and environmental perspectives," Energy, Elsevier, vol. 185(C), pages 730-743.
    3. Chen, Demin & Li, Jiaqi & Wang, Zhao & Lu, Biao & Chen, Guang, 2022. "Hierarchical model to find the path reducing CO2 emissions of integrated iron and steel production," Energy, Elsevier, vol. 258(C).

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