Metro railway introduces air cool chillers to save ground water in Kolkata
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Kolkata: Metro Railway plans to introduce a modern alternative cooling system on the Blue Line to preserve groundwater in Kolkata.
Of the metro line's 15 underground stations, the cooling system of 11 will be changed from traditional water-cooled chillers to air-cooled chillers.
Bids have been invited for the Rs 150 crore project.
Work orders will be placed after the evaluation of the tender. "Work will commence in 2026 and be completed by 2029," a Metro spokesperson said.
He said the familiar scene of cooling towers outside metro stations is going to change forever, allowing Metro Railway to save 18 crore litres of groundwater consumption annually. This is the amount required to run the water-cooled chillers for making metro stations cool every year.
"Once chillers are replaced, huge amounts of water will be saved, which in turn will help protect the environment and water resources," the spokesperson said.
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"A KMC study on groundwater resources has shown that at Borough VII and Borough VIII, the groundwater level is declining at a rate of 30 cm per year compared to 11 cm per year in other boroughs. Metro's initiative will help to arrest the trend," the official added.
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Thirty chillers (a total of 46 chillers in 15 stations) at eight stations will be replaced in the first phase. The stations include Netaji Bhawan, Jatin Das Park, Maidan, and Mahatma Gandhi Road stations. Codal lives of chillers at Rabindra Sarobar, Kalighat, and Chandni Chowk are expiring in three years. They will be converted in the next phase.
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