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System gains from widening the system boundaries: analysis of the material and energy balance during renovation of a coke oven battery
Author(s) -
Larsson Mikael,
Sandberg Peter,
Dahl Jan,
Söderström Mats,
Vourinen Henrik
Publication year - 2004
Publication title -
international journal of energy research
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.808
H-Index - 95
eISSN - 1099-114X
pISSN - 0363-907X
DOI - 10.1002/er.1013
Subject(s) - coke oven , process engineering , coke , production (economics) , process (computing) , engineering , steel mill , battery (electricity) , energy balance , material balance , power station , boundary (topology) , mechanical engineering , power (physics) , waste management , manufacturing engineering , computer science , metallurgy , economics , electrical engineering , materials science , mathematics , operating system , ecology , mathematical analysis , physics , quantum mechanics , biology , macroeconomics
The coke oven plant has a central role in the iron and steel making process in an integrated steel plant. The subject of this research is to study how the production and energy system at the steel industry, with a connected combined heat and power plant, is affected by renovation of the coke oven. The aim is to investigate the interaction between the different processes and how the choice of system boundary affects the operation practice for the steel plant. MILP‐based optimization models have been developed and used for the evaluation. The analysis shows that it is very important to take the interactions between the different production units in the system into consideration when making the analysis. A system optimization with a boundary including the whole system has a greater potential for minimizing the total system cost than one that only includes the processes where the actual changes are made. Conclusions are also drawn regarding the production practice for the specific system. Copyright © 2004 John Wiley & Sons, Ltd.