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Development and Testing of an Optimization Model at Selected Eskom Sites for an Integrated Water Solution. Volume 1: Integrated Water and Membrane Network Systems
Expanded Title:Volume 1 in this two-volume series focuses on “Integrated Water and Membrane Network Systems”, whilst Volume 2, “Cooling Tower Model Development” is dedicated to cooling water system design that is characterized by multiple cooling towers. A cooling water system, in the context of this investigation, refers to a cooling tower with its associated set of heat exchangers. In Volume 1, the developed model was validated using Eskom Kriel Power Station. The choice of this 110 Ml/day site was informed by the availability of data and willingness of personnel to give guidance on testing and implementation of results. Preliminary results have shown potential savings of more than 12% in freshwater use. This facility operates on a zero liquid effluent discharge philosophy. Consequently, no mention is made of wastewater savings. As part of knowledge transfer, a workshop was conducted at Eskom, demonstrating the applications of process integration in water minimization. Graphical and mathematical optimization techniques were presented in detail. In particular, the attendees were taken through the entire thinking process that is necessary for identification of relevant streams for optimization, as well as characterization of streams into sources and sinks. The developed model has been successfully tested and applied to Eskom Kriel Power Station. Various scenarios were explored and analysed as potential sources for the final design. The most outstanding among the scenarios involved the reuse of blow-down from one cooling tower to the other and yielded almost 12% savings in freshwater use. This scenario was discussed in detail with the plant personnel and proved to be feasible.
Date Published:01/07/2016
Document Type:Research Report
Document Subjects:Water Resource Management/IWRM - Water Governance, Wastewater Management - Industrial
Document Keywords:Governance
Document Format:Report
Document File Type:pdf
Research Report Type:Standard
WRC Report No:2289/1/16
ISBN No:978-1-4312-0817-3
Authors:Buabeng-Baidoo E; Nezungai D; Mafukidze N; Abass M; Majozi T
Project No:K5/2289
Organizations:The University of the Witwatersrand
Document Size:1 288 KB
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