Induced Draft Cooling Tower Louvers

Induced Draft Cooling Tower Louvers are essential components installed on the air-inlet sides of an induced draft cooling tower. They control airflow, retain water inside the tower, and protect internal components.

What Are Induced Draft Cooling Tower Louvers?

In an induced draft cooling tower, the fan is located at the top and pulls air upward through the fill. Induced Draft Cooling Tower Louvers are fixed or removable panels installed at the lower air-inlet openings of the tower casing.

Main Functions Of Induced Draft Cooling Tower Louvers

1. Prevent Water Splash-Out

  Stop water droplets from escaping the tower due to air velocity.

2. Ensure Uniform Airflow

  Direct incoming air evenly across the fill for better heat transfer.

3. Block Sunlight

  Reduce algae growth by limiting direct UV exposure inside the cold-water basin.

4. Reduce Drift Losses

  Work together with drift eliminators to minimize water loss.

5. Debris & Wildlife Protection

  Prevent leaves, birds, and large debris from entering the tower.

Common Induced Draft Cooling Tower Louvers Types

1. Fixed Louvers

* Most common for induced draft towers

* Installed permanently in tower panels

* Low maintenance and cost-effective

2. Removable Louvers

* Easy access for inspection and cleaning

* Used in industrial and petrochemical towers

3. Combination Louver + Inlet Screen

* Integrated insect and debris protection

* Often used in dusty environments

Induced Draft Cooling Tower Louver Materials

Design Considerations

* Air velocity (typically 1.5–3.0 m/s at inlet)

* Louver blade angle (optimized to minimize pressure drop)

* Free air area (higher free area = lower fan power)

* Compatibility with tower type (crossflow vs counterflow)

> Induced draft crossflow towers rely heavily on well-designed louvers since air enters horizontally through the louver panels.

Common Problems & Solutions

Maintenance Tips

* Inspect for cracks, warping, or missing blades

* Clean scale and biofouling every 6–12 months

* Ensure tight sealing between louver panels and casing

* Replace aged PVC louvers after long UV exposure