Thermodynamic multi-objective optimization of a solar-dish Brayton system based on maximum power output, thermal efficiency and ecological performance

Release time:2021-04-29

DOI number:10.1016/j.renene.2016.04.052

Journal:RENEWABLE ENERGY

Key Words:Solar-dish brayton system; Multi-objective optimization; NSGA-II; Decision making

Abstract:A hierarchical structural decomposition analysis (SDA) model has been developed based on process-level input-output (I-O) tables to analyze the drivers of energy consumption changes in an integratedsteel plant during 2011-2013. By combining the principle of hierarchical decomposition into D&L method, a hierarchical decomposition model for multilevel SDA is obtained. The developed hierarchical IO-SDA model would provide consistent results and need less computation effort compared with the traditional SDA model. The decomposition results of the steel plant suggest that the technology improvement and reduced steel final demand are two major reasons for declined total energy consumption. The technical improvements of blast furnaces, basic oxygen furnaces, the power plant and the by-products utilization level have contributed mostly in reducing energyconsumption. A major retrofit of ancillary process units and solving fuel substitution problem in the sinter plant and blast furnace are important for further energy saving. Besides the empirical results, this work also discussed that why and how hierarchical SDA can be applied in a process-leveldecomposition analysis of aggregated indicators.

Indexed by:Journal paper

Discipline:Engineering

First-Level Discipline:Power Engineering and Engineering Thermal Physics

Volume:95

Page Number:465-473

ISSN No.:0960-1481

Translation or Not:no

Date of Publication:2016-09-29

Included Journals:SCI

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