An evaporative cooling tower is a heat exchanger that transfers heat from circulating water to the atmosphere. Warm water from the heat source is pumped to the top of the tower and will than flow down through plastic or wooden shells. As it falls downward across baffles, the water is broken into small droplets. Simultaneously, air is drawn in through the air inlet louvers at the base of the tower and travels upward through the wet deck fill opposite the water flow. A small portion of the water is evaporated which removes the heat from the remaining water causing it to cool down 10 to 20°C. The water falls down into a basin and will be brought back into the production process from there. Some of the water is lost to evaporation and thus the fresh water is constantly added to cooling tower basin to make up the difference
