What Are Cooling Towers?

What exactly are cooling towers anyway? They are heat rejection devices used to extract waste heat into the air from the cooling of a water stream to a lesser temperature. They are also referred to evaporate heat rejection devices. These devices provide lower water temperatures than an air cooled or heat rejection devices.
Cooling towers are [...]

Cooling tower closed circuit

This is how a cooling tower closed circuit looked like. See the cold water indicated by the blue arrows. The cool water is being pumped up to by a centrifugal pump. At the top of the cooling tower, the cool water is sprayed down. Hot air / hot vapour indicated by red arrows escape above [...]