What Does a Chilled Water Coil Do In AHU?

What does a chilled water coil do in AHU?

A chilled water coil is a component of an air handling unit (AHU) that is used to cool air as it passes through the unit. The chilled water coil works by circulating chilled water through a network of small tubes that are mounted within the AHU. As the air passes over these tubes, it is cooled by the chilled water, which absorbs heat from the air.

The chilled water coil is typically connected to a chiller, which is responsible for cooling the water that is circulated through the coil. The chiller can be a separate unit or may be integrated into the AHU itself.

The cooled air produced by the chilled water coil is then distributed through ductwork to various parts of a building to provide cooling. Chilled water coils are commonly used in large commercial buildings, such as office buildings, hospitals, and shopping malls, to provide efficient and effective cooling.

In addition to cooling the air, the chilled water coil also helps to dehumidify the air. As the air passes over the cold surface of the chilled water coil, moisture in the air condenses on the surface of the coil, and is drained away from the coil. This process reduces the humidity levels in the air, which is essential for maintaining a comfortable indoor environment.

The design of the chilled water coil can vary depending on the specific requirements of the AHU and the air conditioning system. The size, shape, and number of coils used will depend on factors such as the cooling load, air flow rate, and temperature requirements of the system.

Maintenance of the chilled water coil is important to ensure its efficient operation. Regular cleaning and inspection of the coil will help to prevent buildup of dirt, dust, or other contaminants that can reduce its performance. Proper water treatment is also essential to prevent the buildup of scale or corrosion on the surface of the coil.

Overall, the chilled water coil is an important component of an AHU that helps to maintain a comfortable and healthy indoor environment by cooling and dehumidifying the air that is circulated through the unit.