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Processes 2019, 7(2), 103; https://doi.org/10.3390/pr7020103

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

1
Department of Chemical Engineering, Indian Institute of Technology Bombay, Powai, Mumbai 400076, India
2
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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Abstract

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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