Large buildings don’t just use "giant air conditioners." They use a tag-team system: and Cooling Towers.
A small amount of water evaporates, which carries a massive amount of heat away into the sky (that's the white "steam" you see in winter).
The biggest enemy of this duo is Because cooling towers are open to the outside air, they act like giant air filters, catching dust and bugs. Regular water treatment is the "secret sauce" that keeps these systems from breaking down. Hvac Water Chillers and Cooling Towers
The chiller is the heart of the operation. It sits inside the building (usually in a basement or mechanical room) and performs one main job:
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The Dynamic Duo: How Chillers and Cooling Towers Keep Their Cool
For skyscrapers or hospitals, air-cooled systems would have to be impossibly large. Regular water treatment is the "secret sauce" that
Once the chiller has "captured" the heat, it needs to get rid of it. It transfers that heat to a second, separate loop of water that heads straight to the on the roof.