An open circuit cooling tower operates on the principle of evaporative cooling. It brings hot process water into direct contact with ambient air to reject heat into the atmosphere. The process follows a highly efficient cycle: Distribution: Hot water from the facility’s condenser or process loop is pumped to the top of the tower and distributed via spray nozzles. The Fill Media: The water cascades down through a specialized honeycomb-like structure called 'fill' or 'wet deck.' This fill maximizes the surface area of the water and slows its descent. Air Interaction: A massive motorized fan draws or forces ambient air through the cascading water. Evaporation: As the air passes the water, a tiny fraction of the water evaporates. Because evaporation absorbs a massive amount of latent heat, the remaining water is rapidly and deeply cooled. Return: The chilled water collects in a cold-water basin at the bottom of the tower, ready to be pumped back to the facility to absorb more heat.
