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Processes 2013, 1(3), 279-295; doi:10.3390/pr1030279

Flexible Design and Operation of Multi-Stage Flash (MSF) Desalination Process Subject to Variable Fouling and Variable Freshwater Demand

1
Maintenance and Projects Department, National Oil Corporation, P.O. Box 2655, Tripoli 00, Libya
2
Industrial Department, National Oil Corporation, P.O. Box 2655, Tripoli 00, Libya
3
School of Engineering Design & Technology, University of Bradford, Bradford, West Yorkshire BD7 1DP, UK
*
Author to whom correspondence should be addressed.
Received: 25 June 2013 / Revised: 1 August 2013 / Accepted: 13 August 2013 / Published: 11 October 2013
(This article belongs to the Special Issue Feature Papers)
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Abstract

This work describes how the design and operation parameters of the Multi-Stage Flash (MSF) desalination process are optimised when the process is subject to variation in seawater temperature, fouling and freshwater demand throughout the day. A simple polynomial based dynamic seawater temperature and variable freshwater demand correlations are developed based on actual data which are incorporated in the MSF mathematical model using gPROMS models builder 3.0.3. In addition, a fouling model based on stage temperature is considered. The fouling and the effect of noncondensable gases are incorporated into the calculation of overall heat transfer co-efficient for condensers. Finally, an optimisation problem is developed where the total daily operating cost of the MSF process is minimised by optimising the design (no of stages) and the operating (seawater rejected flowrate and brine recycle flowrate) parameters. View Full-Text
Keywords: freshwater demand; storage tank; dynamic optimisation; total operating cost freshwater demand; storage tank; dynamic optimisation; total operating cost
This is an open access article distributed under the Creative Commons Attribution License (CC BY 3.0).

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MDPI and ACS Style

Said, S.A.; Emtir, M.; Mujtaba, I.M. Flexible Design and Operation of Multi-Stage Flash (MSF) Desalination Process Subject to Variable Fouling and Variable Freshwater Demand. Processes 2013, 1, 279-295.

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