AT Series Natural/Atmospheric Cooling Towers

The primary task of a cooling tower is to reject heat into the atmosphere. This heat rejection is accomplished through the natural process of evaporation that takes place when air and water is brought into direct contact in the cooling tower. The evaporation is most efficient when the maximum water surface area is exposed to the maximum flow of air in the longest possible period of time.

A natural cooling tower cools the hot water naturally by use of air. It does not contain any types of fans or fills so it is called a fill less and fanless cooling tower. Most of the early cooling towers achieve heat dissipation by natural ventilation. Here, the water temperature, wind speed, and wind direction cannot be controlled due to natural ventilation. Thus, these cooling towers are only used in cooling water recycling in some power plants, some chemical equipments.

In Natural type cooling towers water is chilled by increasing air traveling time, while water is sprayed with the help of spray nozzles at the top. These nozzles uniformly spread water across a broad spray angle. The entire tower is covered with louver covers which assists in guiding outside air to enter the tower chamber. The flow of water screen creates the pressure difference inside and outside the cooling tower to inhale the external air into the cooling tower. As there are no mechanical equipements involved in this approach, it saves money on running costs.