Some electronics manufacturers have made centrifugal fans with external rotor motors ( the stator is inside the rotor ), and the rotor is directly mounted on the fan wheel ( impeller ).
22.
Centrifugal fans are constant displacement devices or constant volume devices, meaning that, at a constant fan speed, a centrifugal fan will move a relatively constant volume of air rather than a constant mass.
23.
Centrifugal fans are constant displacement devices or constant volume devices, meaning that, at a constant fan speed, a centrifugal fan will move a relatively constant volume of air rather than a constant mass.
24.
Centrifugal fans use the kinetic energy of the impellers to increase the volume of the air / gas stream . which in turn moves them against the resistance caused by ducts, dampers and other components.
25.
If, for example, a centrifugal fan moves 1, 000 CFM at 70�F it will also move 1, 000 CFM at 200�F . The air volume delivered by the centrifugal fan is not affected by density.
26.
If, for example, a centrifugal fan moves 1, 000 CFM at 70�F it will also move 1, 000 CFM at 200�F . The air volume delivered by the centrifugal fan is not affected by density.
27.
For instance, a centrifugal fan is a constant CFM device or a constant volume device, meaning that, at a constant fan speed, a centrifugal fan will pump a constant volume of air rather than a constant mass.
28.
For instance, a centrifugal fan is a constant CFM device or a constant volume device, meaning that, at a constant fan speed, a centrifugal fan will pump a constant volume of air rather than a constant mass.
29.
When a centrifugal fan is specified for a given CFM and static pressure at conditions other than standard, an air density correction factor must be applied to select the proper size fan to meet the new condition.
30.
The fluid enters along the axis or center, is accelerated by the impeller and exits at right angles to the shaft ( radially ); an example is the centrifugal fan, which is commonly used to implement a vacuum cleaner.
