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Processes 2019, 7(2), 103;

Scheduling of Energy-Integrated Batch Process Systems Using a Pattern-Based Framework

Department of Chemical Engineering, Indian Institute of Technology Bombay, Powai, Mumbai 400076, India
Department of Chemical Engineering, Institute of Chemical Technology, Mumbai 400019, India
Author to whom correspondence should be addressed.
Received: 18 January 2019 / Revised: 6 February 2019 / Accepted: 8 February 2019 / Published: 15 February 2019
(This article belongs to the Special Issue Design and Control of Sustainable Systems)
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In this paper, a novel pattern-based method is developed for the generation of optimal schedules for energy-integrated batch process systems. The proposed methodology is based on the analysis of available schedules for the identification of repetitive patterns. It is shown that optimal schedules of energy-integrated batch processes are composed of several repeating sections (or building blocks), and their sizes and relative positions are dependent on the scheduling horizon and constraints. Based on such a decomposition, the proposed pattern-based algorithm generates an optimal schedule by computing the number and sequence of these blocks. The framework is then integrated with rigorous optimization-based approach wherein it is shown that the learning from the pattern-based solution significantly improves the performance of rigorous optimization. The main advantage of the pattern-based method is the significant reduction in computational time required to solve large scheduling problems, thus enabling the possibility of on-line rescheduling. Three literature examples were considered to demonstrate the presence of repeating patterns in optimal schedules of energy-integrated batch systems. The effectiveness of the proposed methodology was illustrated using an integrated reactor-separator system. View Full-Text
Keywords: batch scheduling; energy integration; mixed-integer optimization; patterns batch scheduling; energy integration; mixed-integer optimization; patterns

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Suresh Jogwar, S.; Mete, S.; Mathpati, C.S. Scheduling of Energy-Integrated Batch Process Systems Using a Pattern-Based Framework. Processes 2019, 7, 103.

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