Natural Draught Cooling Tower Natural draught cooling towers are monumental structures designed to dissipate waste heat from industrial processes. These towers utilize the natural convection process, capitalizing on the density differences between the hot air inside the tower and the cooler ambient air to create an upward draught, which effectively cools the water. Structure and Design The square /rectangle shape of natural draught cooling towers serves both aesthetic and functional purposes. The widening base enhances the airflow velocity, maximizing the cooling efficiency. The top of the tower flares out to disperse the moist air high into the atmosphere, preventing it from mixing back into the intake air. There are three option for structures 1] timber 2] hot dip galvanized mild steel and pultruded. Working Principle The cooling process in a natural draught cooling tower is driven by the principle of convection: Hot Water Distribution: Hot water from industrial processes is sprayed over a distribution system at the top of the tower, creating a thin film that increases the surface area for heat exchange. Airflow Generation: The temperature differential between the warm, moist air inside the tower and the cooler outside air creates buoyancy, causing the warm air to rise through the tower. This natural upward draught draws in cooler air from the base. Heat Exchange: As the hot water descends through the tower, it comes into contact with the rising air. Heat is transferred from the water to the air through direct contact and evaporation, cooling the water. Water Collection: Cooled water is collected at the base of the tower and recirculated back into the industrial process for reuse. Moist Air Discharge: The warm, moist air is expelled from the top of the tower, where it dissipates into the atmosphere, thus completing the cooling cycle. Advantages and Applications Efficiency: Natural draught cooling towers are efficient in normal temperature difference. When Delta ‘T’ is higher than we suggest mechanical or artificial draught cooling tower Low Operating Costs: The absence of mechanical components significantly reduces maintenance and operating costs. It is working efficiently with any fills media or fan .So replacing fills , fan, motor spare cost is zero. Environmental Impact: These towers facilitate efficient thermal management and minimize the need for excessive water consumption.it is also save energy like not using electric motor is carbon production. Applications: Widely used in power generation, petrochemical industries, and other sectors where normal water temperature difference require.