Two Stage Evaporative Cooling Machine System

Indirect/direct cooling, also known as two-stage evaporative cooling, uses both indirect and direct cooling techniques to cool the air. The first indirect "cooling step" uses cold recirculation water to pre-cool the ambient air in a heat exchanger.Evaporative coolers, also called swamp coolers, rely on this principle. By passing outdoor air over water-saturated pads, the water in the pads evaporate, reducing the air temperature by 15°- to 40°F-before it is directed into the home.