From scidev.net http://www.scidev.net/Features/index.cfm?fuseaction=readFeatures&itemid=625&language=1:
"The Karavatti plant, built by India's National Institute of Ocean Technology, uses a process akin to rain formation. Warm surface water is pumped into an onshore vacuum chamber, where some of the water vaporises.
Cold water drawn from 350 metres below the sea's surface then condenses the vapour in an adjoining chamber.
Using this process, called low-temperature thermal desalination, the plant produces 100,000 litres of fresh water a day. Although the process consumes 30 per cent more energy than its rival technologies, installing more chambers should make it more efficient and — at US$1 per 1,000 litres — cheaper."
P.S. The usual name is "KAVARATTI"
"The Karavatti plant, built by India's National Institute of Ocean Technology, uses a process akin to rain formation. Warm surface water is pumped into an onshore vacuum chamber, where some of the water vaporises.
Cold water drawn from 350 metres below the sea's surface then condenses the vapour in an adjoining chamber.
Using this process, called low-temperature thermal desalination, the plant produces 100,000 litres of fresh water a day. Although the process consumes 30 per cent more energy than its rival technologies, installing more chambers should make it more efficient and — at US$1 per 1,000 litres — cheaper."
P.S. The usual name is "KAVARATTI"
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