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Optimization of Energy Supply Systems in Consideration of Hierarchical Relationship Between Design and Operation (Search for K-Best Solutions in Multiobjective Optimization)

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  • A mixed-integer linear programming method utilizing the hierarchical relationship between design and operation variables proposed to solve the optimal design problem of energy supply systems efficiently is extended to search K-best solutions in multiobjective optimization: At the upper level, the optimal values of design variables are searched by the branch and bound method with operation variables relaxed to continuous ones; At the lower level, the values of operation variables are optimized independently at the respective periods set for variations in energy demands by the branch and bound method with the values of design variables given tentatively during the search at the upper level. A weighting method is employed for multiobjective optimization, and a weighted sum of the annual total cost and primary energy consumption is adopted as the objective function to be minimized. A practical case study on the optimal design of a cogeneration system is conducted. The validity and effectiveness of the proposed method are clarified, and the trade-off relationship between the annual total cost and primary energy consumption is confirmed.

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Author:Shusuke Taniguchi, Ryohei Yokoyama, Yuji Shinano, Masashi Ohkura, Tetsuya Wakui
Document Type:Article
Parent Title (Japanese):エネルギー・資源学会第31回エネルギーシステム・経済・環境コンファレンス講演論文集
First Page:267
Last Page:272
Year of first publication:2015
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