What type of draft does a spray pond represent in cooling applications?

A spray pond represents a natural draft in cooling applications because it relies on the inherent properties of air movement driven by temperature differences rather than mechanical means. In a spray pond, water is spread out and exposed to the atmosphere, allowing it to evaporate. As the water evaporates, it cools down the remaining water in the pond and cool air is drawn in from the surrounding environment to replace the evaporated water vapor. This natural process of cooling occurs without the use of fans or blowers, making it distinctly different from forced or induced drafts where mechanical equipment is used to move air.

The concept of natural draft in spray ponds is essential for passive cooling systems in industrial and power generation applications, leveraging environmental conditions effectively to maintain operational efficiency.