The basic principle of operation of the axial fan is that the direction of air flow is parallel to the rotor shaft. The blades of the fans force air linearly to the shaft. They are known to create a high flow rate, and they are able to achieve a bigger volume of air flow. In their operation, the air movements they create is of lower pressure and generally require lower power input for operation.
How do they Operate?
- These fans are best suited for low air resistance and high flow usage conditions. There is a wide variation of axial fans in industry depending on the final usage. The blades can be forward curved, straight or backward curved. In usage, there is greater efficiency when the blades are curved backwards than the forward curved blades, but it has also been recorded that the forward oriented blades are better at self-cleaning that the backward oriented.
Features of Axial Fans
- The main distinguishing component of the axial fan is the axial impeller with the number of blades ranging from 2 to 20 depending on the design and performance requirements. This is connected to powerful drive motor, and these are assembled in a housing designed for parallel flow of air through the fan.
- These fans are highly energy efficient with the ability to generate greater air movement using considerably less energy, and therefore high cost savings to users. When compared to other types of fans, they are able to offer up to 40% savings on power usage.