Centrifugal Blower Selection Process by Xianrun Blower
The 2nd Stage of Selection:
The centrifugal fan model determines the performance curve, performance curve can be divided into dimensioned curve and dimensionless curve.
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Dimensioned curve is the basis to decide whether the centrifugal fan can meet the site requirements, while the dimensionless curve is the basis of depicting the fan performance. The dimensioned curve represents the particularity, dimensionless curve represents the universality.
In general, the dimensionless parameters are the airflow coefficient, pressure coefficient, the efficiency, specific speed.
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Airflow coefficient, pressure coefficient are the basis for calculating fan model; specific speed is the basis to select the fan model; the efficiency is to determine whether the centrifugal fan have high efficiency.
According to the specific speed, to select the fan model and determine whether the working points are in high efficient area. If the points are in high efficient area, it needs to preliminary calculation fan model according to airflow coefficient and pressure coefficient.