Here’s a more detailed explanation:
Closed-circuit system:
Dry cooling towers are closed-circuit systems, meaning the fluid being cooled (often water or a water-glycol mixture) is contained within a closed loop and does not come into direct contact with the ambient air.
Heat transfer via heat exchanger:
Heat is transferred from the working fluid to the air through a heat exchanger, similar to a radiator in a car.
Air-cooled heat exchanger:
The heat exchanger consists of finned tubes through which the hot fluid flows. Ambient air is then passed over these tubes, either naturally or mechanically (using fans), to remove the heat.
No evaporation:
Unlike wet cooling towers, dry cooling towers do not utilize water evaporation for cooling, resulting in minimal water consumption and reduced water treatment requirements.
Applications:
Dry cooling towers are commonly used in power plants (especially in regions with water scarcity), industrial processes, and HVAC systems.
Advantages:
Reduced water consumption and minimal water treatment are key advantages.
Disadvantages:
Dry cooling towers are generally less efficient than wet cooling towers, particularly in hot and humid climates, and may require a larger footprint and higher initial investment.