Variable Speed Drive Cooling Tower Fan

While tower designs vary from manufacturer to manufacturer fans are always used to move air through the cooling tower cooling the process water.

Variable speed drive cooling tower fan.

For direct connected or belted cooling tower fans this minimum speed is usually not a concern. Drives and cooling tower fan motors reduced power consumption is a common goal for all of us. For example in extreme cold weather conditions tower icing can be averted by running the fan at a slower than normal speed or back running the fan at. If we were to consider the significance of the power savings using variable frequency drives on your cooling tower and the inherent operating benefits vfd s bring to a.

One way is to increase capacity of cooling tower by installing another cooling tower cell. However when a gearbox is used the. At 50 fan speed power consumption is only 16. Operating requirements for a cooling tower may include the ability to start and stop the fan change the fan speed based on the sump water temperature and possibly change the fan direction.

A cooling tower is a heat exchange system that removes waste heat from a process system fluid usually water. Offer high torque direct drive motors for cooling tower applications. Cooling towers are used in both commercial and industrial applications. Variable speed drive for dusting fan in steel iron industry.

Variable speed drive on cooling tower fans. The direct drive solution offers the benefits of variable speed control and eliminates the cost and maintenance required for traditional gearboxes or belted solutions. The fan couples directly to the motor and is controlled by a unique ac drive to provide optimal speed and. There are only two duties in which we have flow control valves to control the process temperature by varying the cooling water flow through the heat exchanger.

A major advantage of this method of speed control is its inherent adjustability. The paper presents variable speed drive vsd structures for automatic speed regulation of cooling tower fans in order to maintain a constant temperature for the circulated technological water. A fan running at 80 speed will consume only 50 of the power of a fan running at full speed. Most of the duties in our cooling tower system only have manual valves.

A minimum speed of 20 25 is usually possible on an existing motor. The mechanical components of a cooling tower fan are made up of motor gearbox drive shaft disc couplings and fan impeller. Other way is to keep the same cooling tower and install variable frequency drive vfd on cooling tower fans so that we can increase fan speed hence increase air flow to get the required cooling and reduced cooling water supply temperature. Abb direct drive motor and variable speed drive packages for industrial cooling replace the gearbox driveshaft and induction motor typically used in industrial cooling fans.

Direct drive motor and vsd packages can be used either in wet or dry cooling towers air cooled condensers acc of air cooled heat exchangers ache.