The difference between induced or forced draft

The difference between induced or forced draft

Fluid Cooling Systems

Induced draft implies an inlet fan placed on top of the cooling tower and the creation of low pressure. Axial fans are always used for this type of draft.

Forced draft means an exhaust fan placed at the base of the cooling tower which then causes overpressure. Both axial and centrifugal fans can be used.

Almeco’s cooling tower range contains all different types.

Advantages and disadvantages

Induced draft - Axial fan

+

  • Low absorbed capacity
  • Small foot print (requiring little space)

-

  • Higher noise level
  • Humid air stream drive
Forced draft - Axial fan

+

  • Low absorbed capacity
  • Easy maintenance
  • Dry air stream drive

-

  • Higher noise level
Forced draft - Centrifugal fan

+

  • Low noise level
  • Easy maintenance
  • Dry air stream drive

-

  • Higher absorbed capacity