How to use centrifugal fans in series
Centrifugal fans in series operation is an effective method. When a single centrifugal fan cannot meet the requirements of the conveying task, series operation can be adopted. Series operation refers to the working mode in which the outlet of the previous centrifugal fan conveys fluid to the inlet of another centrifugal fan. This method can improve efficiency and save energy.
When the centrifugal fans are in series operation, due to the continuity of the flow, the sum of the flow through the two fans is equal to the total flow of the system, and the sum of the pressure differences of the inlet and outlet of each centrifugal fan is the total pressure of the system. The series operation of centrifugal fans is mainly divided into the same suction, same discharge, and one suction and one discharge operation modes, which need to be selected according to actual conditions.
The series operation of centrifugal fans has the following characteristics:
After the centrifugal fans are in series, the original suction characteristics of the fan can still be maintained, the operation is stable, and the performance is stable.
The pressure of the centrifugal fans in series operation basically meets the superposition principle, but as the pipeline resistance decreases, the actual performance curve of the series operation gradually separates from the theoretical performance curve, and the gap between the two tends to increase. The actual pressure of the series operation is less than the theoretical pressure.
The total power of the centrifugal fans in series operation is less than the theoretical superposition power.
The series operation of centrifugal fans is suitable for operation under conditions with large pipeline resistance. When the pipeline resistance is large, the pressure and efficiency of series operation are greatly improved, and the series effect is more obvious.
In short, the series operation of centrifugal fans is an effective method to improve efficiency and save energy. In practical applications, it is necessary to select the appropriate operation mode according to the actual situation.
