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TRG-TRC013-EN 29
period two
Fan Types
notes
The static pressure produced by a fan is a function of the forward motion of the
air at the blade tip. The FC fan can perform, within its airflow and static pressure
range, at lower rotational speeds than other types of fans.
The typical application range of this type of fan is from 30 to 80 percent
wide-open airflow. Selecting an operating point that places the airflow below
approximately 30 percent wide open may place the fan in an area of instability.
Similarly, an operating point that places the airflow beyond 80 percent wide
open typically produces noise and inefficiency.
The maximum static efficiency of the FC fan is from approximately 50 to
65 percent and occurs just to the right of the maximum static-pressure point on
the fan performance curve.
application
application
range
range
30%
30%
80%
80%
airflow
airflow
static pressure
static pressure
Forward Curved Fan
static efficiency
static efficiency
50 to 65%
50 to 65%
Figure 42