Difference between a ‘Force Draft’ and ‘Induced Draft’ cooling tower ?
Difference between a ‘Force Draft’ and ‘Induced Draft’ cooling tower ?
Difference between a ‘Force Draft’ and ‘Induced Draft’ cooling tower? : The most difference between force draft and actuated draft cooling towers lies within the arrangement of the fan(s) relative to the airflow heading inside the tower :
Force Draft Cooling Tower :
- In a force draft cooling tower, the fan(s) are situated at the air inlet or intake of the tower.
- The fan(s) force air into the tower, making positive pressure and pushing the air upward through the tower.
- As the air passes through the tower, it comes into contact with the water being cooled, encouraging heat exchange and evaporation.
- Drive draft towers typically have a shorter height compared to actuated draft towers, as the fans help in pushing air through the tower against gravity.
Induced Draft Cooling Tower :
- In an induced draft cooling tower, the fan(s) are found at the air discharge or outlet of the tower.
- The fan(s) make a negative pressure or suction at the beat of the tower, drawing air upward through the tower and over the heat trade surfaces.
- As the air is drawn through the tower, it encourages heat exchange with the water being cooled, advancing evaporation and cooling.
- Induced draft towers are ordinarily taller than constrain draft towers, as the fans depend on characteristic convection and the chimney effect to draw air through the tower.
Key differences and considerations between force draft and initiated draft cooling towers incorporate :
- Airflow Direction: Drive draft towers have airflow coordinated into the tower, whereas initiated draft towers have airflow drawn through the tower.
- Fan Placement: In drive draft towers, fans are situated at the tower’s air inlet, whereas in actuated draft towers, fans are found at the tower’s air outlet.
- Tower Height: Induced draft towers are ordinarily taller than force draft towers due to the common draft created by the fan placement.
- Fan Power Consumption: The power consumption of fans in force draft towers may be higher than induced draft towers, as they must overcome the resistance of pushing air through the tower.
- Maintenance Considerations: The area of fans in force draft towers may make them more helpless to introduction to water and environmental elements, requiring more frequent maintenance compared to induced draft towers.
Both force draft and induced draft cooling towers have their advantages and are appropriate for different applications depending on variables such as space availability, cooling requirements, and operating conditions.
