Forward Curved Centrifugal Fan Efficiency

These centrifugal fans are ideal for those companies looking for fans that can deliver medium to high airflow in their facilities.

Forward curved centrifugal fan efficiency.

Figure 1 centrifugal fan figure 2 axial fan each fan system has different types of wheels or impeller types. When there is no pressure in the system the fan is blowing freely a forward curved centrifugal fan will produce the greatest volume flow. Forward blade backward blade and radial blade. Forward curve sometimes referred to as a squirrel cage fan forward curve fans are used in most residential and light commercial hvac equipment.

The characteristic curve of three kinds of centrifugal fan is shown in figure 2 15. As a resistance to flow is applied to the suction or exhaust side of the fan the volume flow rate will drop. Because of this they tend to be noisier than axial fans and require more power to run. Centrifugal fans with forward curved blades always require a spiral housing.

Centrifugal fans with forward curved blades. Their characteristic features are a low noise level relatively small air flow with a high increase in static pressure and space saving application. The centrifugal fans with forward curved blades 2l 90 o are designed due to the small dimensions and good static pressure characteristics of fans and such a recommendation refers to the fans. Because of this they tend to be noisier than axial fans and require more power to run.

Forward curved centrifugal fans. Generally centrifugal fans have three types of blade. They are suitable for high pressure applications as compared with axial flow fans. Centrifugal fans are capable of generating relatively high pressures.