| 초록 |
A retrofit design problems of the existing batch plants occur when there’s change in the market condition such as new production targets and new selling profits. Previous researches concern only the ways to add new equipment which will be operated in-phase or in-sequence with an existing unit. But in some cases, altering the operating modes between existing units and/or between new ones gives the optimal result. So, a new retrofitting method formulated as MINLP is developed, equally treating the exiting units and the new ones, and considering mixed mode operation, the superstructure including both in-phase and in-sequence operations between any pairs of units.
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