Multi-objective analysis for energy and resource conservation in process systems.

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  • NISHITANI HIROKAZU
    Department of Chemical Engineering, Faculty of Engineering Science, Osaka University
  • KUNUGITA EIICHI
    Department of Chemical Engineering, Faculty of Engineering Science, Osaka University

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Efficient use of both energy and resources in process design was studied by the multi-objective analysis. Exergy consumption and total investment cost are used to measure energy and resource conservation, respectively. A family of ε-constraint problems, in which the constraint is the exergy consumption, was formulated to obtain the trade-off between the two objectives and was solved successively by the max-sensitive method. The preferred solution is easily obtained for a specified condition by using the sensitivity profile along the non-inferior solution curve. An evaporator system for milk concentration is solved as an illustration.

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