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유연한 중간저장탱크 사용이 가능한 공유된 중간 저장탱크 방안에서의 다품종 회분식 공정 생산계획
정재학,이인범,양대륙,장근수 ( Jae Hak Jung,In Beum Lee,Dae Ryook Yang Kun Soo Chang ) 한국화학공학회 1994 Korean Chemical Engineering Research(HWAHAK KONGHA Vol.32 No.2
In this study, we propose the common intermediate storage(CIS) policy which is more efficient than mixed intermediate storage(MIS) policy. The CIS policy is a form of shared storage system, which is extended to overall processes and can be applied to flexible inter-stage intermediate storage policies. Using this strategy, we developed a new completion time algorithm and applied it to two kinds of optimal or near optimal scheduling method; the combinatorial search and the simulated annealing method. We also extended the CIS policy for flexible operation of intermediate storage policy with proper on/off electronic valves and pumps. It thus can be accepted as a basic form of FMS(Flexible Manufacturing System) for operating various storage policies. Finally we suggested the PLC logic of safety interlock to complement the difficult application of CIS policy, i.e, complication of operation and safety, resulting in a part of basic batch process automation mode.
이호경,이인범,양대륙,장근수 ( Ho Kyung Lee,In Beum Lee,Dae Ryook Yang,Kun Soo Chang ) 한국화학공학회 1993 Korean Chemical Engineering Research(HWAHAK KONGHA Vol.31 No.1
For the change of market condition such as increase of demand and new selling price, an optimal retrofit method is proposed through adding new equipments to existing multiproduct batch plant. Until now, the optimum volume and the appropriate position of adding equipments are solved using mixed integer nonlinear program. In this paper, a heuristic procedure is presented which first determines the positions of adding equipments. Then a nonlinear programming is formulated to obtain their optimum sizes. The effectiveness of this method is verified by solving several literature problems.