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A comment on This tech eliminates the need for water for air-conditioning of buildings. Parent comment

Re:This tech eliminates the need for water for air-condition... by yardie on Friday May 27, 2016 @12:30PM (#11787088)
It depends and yes.

Some systems will have a closed system using water or ammonia as the intermediary medium. The coolant is pumped to an air handler on each floor where it cools a condenser filled with refrigerant.

Most chillers are just a big empty box where water is poured over the coils. The evaporating effect cools the medium inside and vents as steam or water vapour.

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Re:This tech eliminates the need for water for air-condition... by psheets on Friday May 27, 2016 @12:44PM (#11787192)
"Chillers" are actually direct expansion cooling devices for liquid. They have a condenser and evaporator just like an air cooled air conditioning system. The evaporator will be on the chilled water supply side and the condenser can be cooled by water or air.

The big empty box with water is an evaporative cooling tower used to cool the condenser side water.

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