Centrifugal fans have many advantages, but there are also some disadvantages. The following are the disadvantages of several common centrifugal fans:

(1) Noise: Centrifugal fans will produce higher noise levels at high speed. This is caused by the friction and compression between the impeller and the air when rotating.

(2) Size: Centrifugal fans are usually larger than axial fans with the same air volume. This is because the centrifugal fan needs to have a rotating impeller and a long inlet and outlet air duct. Therefore, in applications where space is limited, size limitations may need to be considered.

(3) Pressure characteristics: the wind pressure characteristics of the centrifugal fan are relatively gentle at the working point, and when the working point deviates from the design point, the change of wind pressure and air volume may be larger. This can be a challenge in some applications where precise wind pressure control is required.

(4) Energy efficiency: The energy efficiency of centrifugal fans is usually low. Due to the large volume and process design limitations, the aerodynamic efficiency of centrifugal fans is lower than that of axial flow fans. Therefore, in applications with high energy efficiency requirements, it may be necessary to consider other types of fans or take energy efficiency improvement measures.

Despite these drawbacks, centrifugal fans are still one of the most commonly used fan types in many industrial and commercial applications, as centrifugal fans typically have a higher air volume, higher pressure, higher reliability, and a wide range of adaptability.

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