What term is used for a chimney natural draft cooling tower?

A chimney natural draft cooling tower is commonly referred to as a hyperbolic tower. This design is characterized by its distinctive hyperbolic shape, which efficiently enhances the natural draft of air through the tower. The shape facilitates a greater airflow due to the difference in temperature between the warm air rising and the cooler air entering from below, thereby improving the cooling process of the water in the tower.

This design is crucial for optimizing the cooling performance without relying on mechanical fans, which can increase operational costs. The hyperbolic shape not only provides structural stability but also contributes to enhanced cooling efficiency. Other types of cooling towers do not specifically utilize this aerodynamic design, which is unique to hyperbolic structures.