Multi-objective optimization of energy distribution in steel enterprises considering both exergy efficiency and energy cost

Zhengbiao Hu, Dongfeng He and Hongbo Zhao

Energy, 2023, vol. 263, issue PB

Abstract: In integrated steel works, the core objective of system energy conservation techniques is to improve energy utilization and reduce energy costs. Currently, the research on energy distribution optimization of steel enterprises considers only the energy cost of the system and ignores the energy utilization efficiency. However, energy utilization efficiency and energy cost are equally important indicators. Therefore, in this study, a multi-objective optimization model for energy systems was established, which considered minimizing energy cost of the system and maximizing exergy efficiency as the objective functions. The case results indicate that after the optimization aiming at the minimum energy cost (Scheme A) and the maximum exergy efficiency (Scheme B), the energy cost of the two schemes reduced by 24.96% and 9.60%, respectively, and the exergy efficiency increased by 1.67% and 8.65%, respectively. Although Scheme A can significantly reduce the system energy cost, the increase of exergy efficiency is limited. Scheme B is opposite to Scheme A. However, after adopting multi-objective optimization, compared with previous optimization strategies, the energy cost reduced by 22.81%, the exergy efficiency increased by 7.71%, and the energy cost and exergy efficiency of the system were found to be in a better state.

Keywords: Iron and steel industry; Energy distribution; Multi-objective optimization; Equivalent electrical efficiency; Pareto optimality (search for similar items in EconPapers)
Date: 2023
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (3)

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Persistent link: https://EconPapers.repec.org/RePEc:eee:energy:v:263:y:2023:i:pb:s0360544222025099

DOI: 10.1016/j.energy.2022.125623

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