Differences in Operating Power Between Centrifugal Fans and High-Temperature Axial Fans

The operating power of centrifugal fans increases with rising air volume.

Reducing air volume decreases the operating power of high-temperature axial fans, placing centrifugal fans in an active state. In such cases, dampers must be fully closed before gradually adjusting to prevent the fan from directly overloading and burning out the generator.

High-temperature axial fans require full damper opening followed by gradual adjustment to the desired air volume. Centrifugal blowers are machines that rely on mechanical output, forward gas pressure, and gas flow—they are positive displacement fluid machinery.

Centrifugal blowers are widely used in workshops, tunnels, chimneys, cooling towers, vehicles, ships, and buildings for exhaust, dust removal, and cooling; in boilers and light industrial furnaces for forced ventilation; air conditioning equipment and household appliances for cooling and ventilation; drying and sorting grains; and as a source of airflow for charging and circulation.

Centrifugal blowers and high-temperature axial flow fans are not fundamentally different: the former typically mount the motor and fan along the same axis, while the latter usually positions the motor outside the fan housing; the former has simpler construction; and the former is commonly used in air conditioners, intake systems, boiler blowers, and similar applications. The latter are commonly found in ductwork, potentially at the front end of ducts.

Centrifugal blowers alter the flow direction of airborne media, while high-temperature axial fans maintain the flow direction of exhaust media. High-temperature axial fans, featuring axial blades like electric fans or air conditioning mechanical fans, operate as axial-flow fans. Their axial flow design enables efficient gas movement along the fan's rotational axis.

High-temperature axial fans are commonly used in low-pressure demand locations under high-pressure conditions. They operate by moving air and displacing the atmosphere.