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

Processes

Said Alforjani Said²  Mansour Emtir¹ 

[1] Industrial Department, National Oil Corporation, P.O. Box 2655, Tripoli 00, Libya; E-Mail:;Maintenance and Projects Department, National Oil Corporation, P.O. Box 2655, Tripoli 00, Libya; E-Mail:

关键词: freshwater demand;    storage tank;    dynamic optimisation;    total operating cost;   

DOI  :  10.3390/pr1030279

来源: mdpi

【 摘 要 】

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.

【 授权许可】

CC BY   
© 2013 by the authors; licensee MDPI, Basel, Switzerland.