When completed at the end of 2011, the Nemmeli seawater desalination plant will supply up to 100 million liters of potable water a day and reduce the stress on Chennai’s dwindling groundwater resources.
Chennai is India’s fourth largest city, with a population of around 4.6 million. The city is a booming information technology and IT services hub, and among the top ten car manufacturing centers in the world.
The company was awarded the contract in early 2010 by VA Tech Wabag, one of the world’s leading providers of water treatment facilities, for a turnkey electrical, System 800xA control and instrumentation solution for the Nemmeli seawater reverse osmosis desalination plant near Chennai, on the east coast of India.
The ABB solution was singled out for the extensive benefits it brings both to VA Tech Wabag during implementation of the project, and to the end user, Chennai Metro Water, in the form of energy efficiency and reduced operating and maintenance costs.
For VA Tech Wabag, ABB’s turnkey power and automation solution eliminates multi-ordering from different vendors and reduces lead times. ABB’s ability to complete the project in 18 months will be crucial to VA Tech Wabag delivering its largest desalination plant ever within just 24 months.
The scope of supply includes the electrical system for the desalination plant (motors, drives, switchgear, capacitor banks, transformers, cabling, lighting), a 110/11kilovolt ( kV) substation that connects the site to the power grid, the plant’s System 800xA distributed control system, wireless communication system, and the instrumentation for measuring, monitoring and analyzing the entire desalination process. System 800xA will handle all plant operations and provide a comprehensive information management platform for the entire facility.
ABB is also responsible for project engineering, commissioning, and related services.
ABB’s technology leadership in the products and systems that make up the integrated electrical, control and instrumentation solution will bring substantial operational benefits for Chennai Metro Water as well.
For instance, the use of their high-efficiency motors and variable speed drives to power the high pressure pumps and reverse osmosis process will significantly reduce energy consumption and electrical losses. The drives will lower the mechanical and electrical stress on pump components, speed up the long startup process after maintenance shutdowns, and reduce plant downtime compared with the traditional method of mechanical control.
ABB drives cut the energy consumption of pumps at desalination plants significantly compared to traditional suction valve control. They reduce the mechanical stress on pumps and electrical stress on motors and improve membrane life
Over the course of the plant’s lifetime these improvements in energy efficiency, plant productivity and reduced wear and tear will provide a huge and sustained boost to plant profitability.
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