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A unified approach to heat integration in continuous chemical processing plants
Thesis (PhD)--University of Pretoria, 2015.
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| Format: | Thesis |
| Language: | English |
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University of Pretoria
2015
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| _version_ | 1867613530802356224 |
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| access_status_str | Open Access |
| author2 | Majozi, Thokozani |
| author_browse | Majozi, Thokozani |
| author_facet | Majozi, Thokozani |
| collection | Thesis |
| dc_rights_str_mv | © 2015 University of Pretoria. All rights reserved. The copyright in this work vests in the University of Pretoria. No part of this work may be reproduced or transmitted in any form or by any means, without the prior written permission of the University of Pretoria. |
| description | Thesis (PhD)--University of Pretoria, 2015. |
| format | Thesis |
| id | oai:repository.up.ac.za:2263/50676 |
| institution | University of Pretoria (South Africa) |
| language | English |
| last_indexed | 2026-06-10T12:37:37.270Z |
| license_str | Other — see source repository |
| provenance_str_mv | Harvested via OAI-PMH from UPSpace — University of Pretoria Institutional Repository |
| publishDate | 2015 |
| publishDateRange | 2015 |
| publishDateSort | 2015 |
| publisher | University of Pretoria |
| publisherStr | University of Pretoria |
| record_format | dspace |
| source_str | UPSpace — University of Pretoria Institutional Repository |
| spelling | oai:repository.up.ac.za:2263/50676 A unified approach to heat integration in continuous chemical processing plants Majozi, Thokozani shellybeangstrom@gmail.com Beangstrom, Sheldon Grant UCTD Heat integration Pinch analysis Process integration Engineering, built environment and information technology theses SDG-07 Engineering, built environment and information technology theses SDG-09 Engineering, built environment and information technology theses SDG-12 Thesis (PhD)--University of Pretoria, 2015. Heat integration is a popular method for minimising the energy needs of a chemical plant, and also for optimising the accompanying utility systems. In conventional practice, the regions of process-process heat integration, cooling water system design, and steam system design are treated in isolation from one another. Methods have been developed specific to each region, but fail to properly acknowledge the existence of the other regions, or the interaction between various regions of an energy system. This separated approach to process integration leads to suboptimal results. In this work, a new unified approach to heat integration on chemical plants is presented. Models are developed that simultaneously consider the process-process heat exchanger network together with the cooling water and steam networks. The operation of the cooling tower and steam turbines is also included, providing a holistic coverage of the associated utility systems, leading to a comprehensive utility system design. The models can be applied to two specific design cases. The first case involves existing utility systems, with the objective of designing an energy system that best utilises these utilities. The second case considers a grass roots design, in which the utility systems are optimised together with the heat exchanger networks. The advantage of the first case is that systems can be debottlenecked, including systems already debottlenecked using current techniques. The advantage of the second case is that new plants can exploit the improvements by reducing the construction costs of the utility systems. The new models were applied to two case studies to demonstrate their performance. The results show that the new unified approach provides consistent reductions in utility flowrates, compared to the case when the utilities are optimised separately from the process. In all cases, the minimum energy requirement of the process was not compromised in achieving these reductions. These results indicate that a unified approach to heat integration on chemical plants is a feasible method which is superior to current separated techniques. tm2015 mi2026 Chemical Engineering PhD Unrestricted SDG-07: Affordable and clean energy SDG-09: Industry, innovation and infrastructure SDG-12: Responsible consumption and production 2015-11-25T09:47:13Z 2015-11-25T09:47:13Z 2015/09/01 2015 Thesis Beangstrom, SG 2015, A unified approach to heat integration in continuous chemical processing plants, PhD Thesis, University of Pretoria, Pretoria, viewed yymmdd <http://hdl.handle.net/2263/50676> S2015 http://hdl.handle.net/2263/50676 en © 2015 University of Pretoria. All rights reserved. The copyright in this work vests in the University of Pretoria. No part of this work may be reproduced or transmitted in any form or by any means, without the prior written permission of the University of Pretoria. application/pdf University of Pretoria |
| spellingShingle | UCTD Heat integration Pinch analysis Process integration Engineering, built environment and information technology theses SDG-07 Engineering, built environment and information technology theses SDG-09 Engineering, built environment and information technology theses SDG-12 A unified approach to heat integration in continuous chemical processing plants |
| title | A unified approach to heat integration in continuous chemical processing plants |
| title_full | A unified approach to heat integration in continuous chemical processing plants |
| title_fullStr | A unified approach to heat integration in continuous chemical processing plants |
| title_full_unstemmed | A unified approach to heat integration in continuous chemical processing plants |
| title_short | A unified approach to heat integration in continuous chemical processing plants |
| title_sort | unified approach to heat integration in continuous chemical processing plants |
| topic | UCTD Heat integration Pinch analysis Process integration Engineering, built environment and information technology theses SDG-07 Engineering, built environment and information technology theses SDG-09 Engineering, built environment and information technology theses SDG-12 |
| url | http://hdl.handle.net/2263/50676 |