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Enterprise-Wide Optimization of Natural Gas Refining Complex

Kheirandish, Nima | 2020

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  1. Type of Document: M.Sc. Thesis
  2. Language: Farsi
  3. Document No: 53466 (06)
  4. University: Sharif University of Technology
  5. Department: Chemical and Petroleum Engineering
  6. Advisor(s): Farhadi, Fathollah; Vafa, Ehsan
  7. Abstract:
  8. In the upstream part of the natural gas supply chain, the refinery is one of the most complex and energy-intensive sectors that has received little attention. Enterprise-wide optimization, that uses mathematical programming in a centralized and multi-scale point of view, and nonlinear models of the manufacturing sector, can provide optimal plans and operational variables for the production goals of the supply chain. In this research, a multi-scale formulation is presented with a production planning model in one to two-year horizon and six-month time periods and production operational scheduling models with six-month horizon to approach the enterprise-wide optimization of a general gas refining complex. The two models are hierarchically related to each other and are solved considering this feature. The planning part will achieve the production objectives of each period with the aim of maximizing profits in the whole planning horizon. the scheduling part will achieve an operational plan for the specified production objectives by considering the detailed models of the. Finally, through a numerical example the proposed models are implemented in GAMS modeling software and solved with several algorithms, including the state-of-the-art BARON algorithm, which finds the global optimal point at a reasonable CPU time. The results show that the implementation of enterprise-wide optimization for the natural gas refinery is not only easily replaceable with existing methods, but also the only approach to achieve feasible and optimal operational plans
  9. Keywords:
  10. Operational Planning ; Nonlinear Programming ; Production Planning ; Natural Gas Refining Complex ; Enterprise-Wide Optimization (EWO) ; MultiScale Optimization ; Tactical Production Planning

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