Dynamic modelling and modified eventdriven enabled control for sec minimized operation of swro desalination process

Abstract

Industrial desalination of seawater is the most viable and newlineeconomical solution to meet the growing demand for fresh water. Industrial newlinedesalination of seawater can be classified depending on the separation newlinetechniques as thermal and membrane processes. This thesis deals with newlinemembrane-based desalination process because this technique is now the newlineleading technology in many parts of the world due to following factors such newlineas lower maintenance and investment cost and also lower energy requirement newlinethan the other desalination processes. Membrane-based desalination process newlinealso known as reverse osmosis-based desalination process produces fresh newlinewater by removing salt and other impurities from seawater using a number of newlinesemi-permeable membranes operating on the principle of reverse osmosis. newlineThe phenomenon of reverse osmosis occurs by the pressurized flow of newlineseawater across the membrane. Seawater is pressurized above the osmotic newlinepressure using a high-pressure pump system. Despite the abundance of newlineseawater, the use of reverse osmosis-based seawater desalination process to newlinefill the gap between the demand and supply of fresh water is limited due to newlineenergy consumption and increased cost. The energy analysis of seawater newlinereverse osmosis desalination process in different literature shows that the newlineenergy required to drive high pressure pump is more than half of the total newlineenergy consumed by the process. Hence this research focuses on process newlinemodelling and development of a multi-loop control strategy f newline