Full Text Available
Note: Clicking the button above will open the full text document at the original institutional repository in a new window.
Process integration of complex cooling water systems
Dissertation (MEng)--University of Pretoria, 2011.
Saved in:
| Other Authors: | |
|---|---|
| Format: | Thesis |
| Published: |
University of Pretoria
2013
|
| Subjects: | |
| Tags: |
No Tags, Be the first to tag this record!
|
| _version_ | 1867613585482448896 |
|---|---|
| access_status_str | Open Access |
| author2 | Majozi, Thokozani |
| author_browse | Majozi, Thokozani |
| author_facet | Majozi, Thokozani |
| collection | Thesis |
| dc_rights_str_mv | © 2011, 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 | Dissertation (MEng)--University of Pretoria, 2011. |
| format | Thesis |
| id | oai:repository.up.ac.za:2263/28879 |
| institution | University of Pretoria (South Africa) |
| last_indexed | 2026-06-10T12:38:29.059Z |
| license_str | Other — see source repository |
| provenance_str_mv | Harvested via OAI-PMH from UPSpace — University of Pretoria Institutional Repository |
| publishDate | 2013 |
| publishDateRange | 2013 |
| publishDateSort | 2013 |
| 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:2263/28879 Process integration of complex cooling water systems Majozi, Thokozani s29665893@tuks.co.za Gololo, Khunedi Vincent Cooling water systems Heat exchangers UCTD Dissertation (MEng)--University of Pretoria, 2011. Cooling water systems are generally designed with a set of heat exchangers arranged in parallel. This arrangement results in higher cooling water flowrate and low cooling water return temperature thus reducing cooling tower efficiency. Previous research on cooling water systems has focused mainly on heat exchanger network thus excluding the interaction between heat exchanger network and the cooling towers. The studies completed on cooling water system in which the interaction between the cooling tower and the heat exchanger network was taken into consideration were limited to systems with single cooling tower. The main aim of this study was to develop a design methodology for synthesis and optimization of cooling water systems with multiple cooling towers. The design intends to debottleneck the cooling towers by reducing the circulating water flowrate. The study focuses mainly on cooling systems consisting of multiple cooling towers that supply a common set of heat exchangers. In this work the mathematical optimization technique was developed for optimization and synthesis of cooling water system. The heat exchanger network was synthesized using the mathematical optimization technique. This technique is based on superstructure in which all opportunities for cooling water reuse are explored. The cooling tower model was used to predict the thermal performance of the cooling towers while taking the thermal conditions of the associated heat exchanger network into account. The propose technique debotlleneck the cooling towers by decreasing the circulating water flowrate. This implies that a given set of cooling towers can manage an increased heat load. From the case studies, 22% decrease in circulating water flowrate was realized. The blowdown and makeup were also decreased by 7%. Furthermore, the cooling tower effectiveness was also improved by 4%. A decrease in the overall circulation water has an added benefit of decreasing the overall power consumption of the circulating pumps. There is also a potential for the reduction of makeup and blowdown water flowrate. Chemical Engineering unrestricted 2013-09-07T14:24:17Z 2011-10-21 2013-09-07T14:24:17Z 2011-09-06 2011-10-21 2011-10-20 Dissertation Gololo, KV 2011, Process integration of complex cooling water systems, MEng dissertation, University of Pretoria, Pretoria, viewed yymmdd < http://hdl.handle.net/2263/28879 > E11/9/141/gm http://hdl.handle.net/2263/28879 http://upetd.up.ac.za/thesis/available/etd-10202011-160812/ © 2011, 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 | Cooling water systems Heat exchangers UCTD Process integration of complex cooling water systems |
| title | Process integration of complex cooling water systems |
| title_full | Process integration of complex cooling water systems |
| title_fullStr | Process integration of complex cooling water systems |
| title_full_unstemmed | Process integration of complex cooling water systems |
| title_short | Process integration of complex cooling water systems |
| title_sort | process integration of complex cooling water systems |
| topic | Cooling water systems Heat exchangers UCTD |
| url | http://hdl.handle.net/2263/28879 http://upetd.up.ac.za/thesis/available/etd-10202011-160812/ |