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Optimisation-based approaches for multi-floor process plant layout

Ejeh, Jude O.; (2020) Optimisation-based approaches for multi-floor process plant layout. Doctoral thesis (Ph.D), UCL (University College London). Green open access

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The layout configuration of a chemical process plant has an immense impact on its efficiency of operation, energy consumption, environmental impact and safety levels. This design decision usually lasts throughout the life span of a plant but with the advent of smart manufacturing systems, changes can be made as often as required. At present, there is also a growing need for new chemical plants to meet the increasing demand for chemical products. Hence, automating the layout design process using highly efficient and realistic mathematical models is vital. To aid this, mixed integer linear programming (MILP) models are proposed in this thesis for the efficient determination of multi-floor chemical process plant layout designs. These MILP models proposed obtain the layout configurations factoring in equipment inter-connectivity by pipes, pumping, construction, land purchase and a more realistic description for tall equipment that span through floors, with/without the availability of pre-defined production sections. Using novel integer cuts, each model obtains globally optimal solutions for larger problem instances in short computational times. Safety factors are also introduced with risk being quantified using the Dow's fire and explosion index and the Domino Hazard Index. Hazardous events including jet fires, pool fires, fireballs, flash fires, explosions and/or the resulting blast wave effects are quantified as a function of inter-equipment distances. The associated financial risks in the event of an accident are also determined using a more accurate evaluation of the separation distance between equipment. The resulting MILP model estimates the optimal layout configuration and protection device choices for a chemical process plant. In each of these cases, the unique characteristics and limitations of the proposed models are shown using industry-relevant case studies having a varying number of equipment and requirements, with the models handling all features described with improved computational performance.

Type: Thesis (Doctoral)
Qualification: Ph.D
Title: Optimisation-based approaches for multi-floor process plant layout
Event: UCL (University College London)
Open access status: An open access version is available from UCL Discovery
Language: English
Additional information: Copyright © The Author 2020. Original content in this thesis is licensed under the terms of the Creative Commons Attribution 4.0 International (CC BY 4.0) Licence (https://creativecommons.org/licenses/by/4.0/). Any third-party copyright material present remains the property of its respective owner(s) and is licensed under its existing terms. Access may initially be restricted at the author’s request.
UCL classification: UCL
UCL > Provost and Vice Provost Offices > UCL BEAMS
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science > Dept of Chemical Engineering
URI: https://discovery.ucl.ac.uk/id/eprint/10109943
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